HMP230 Series Transmitters USER'S GUIDE M210225en-B May 2002
PUBLISHED BY Vaisala Oyj P.O. Box 26 FIN-00421 Helsinki Finland Phone : Fax: (+358 9) 894 91 (+358 9) 8949 2227 Visit our Internet pages at http://www.vaisala.com/ © Vaisala 2002 No part of this manual may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holder. The contents are subject to change without prior notice.
HMP230 SERIES User's Guide M210225en-B Contents 1. PRODUCT DESCRIPTION ................................................................................................... 1 2. TO BE NOTED WHEN MEASURING HUMIDITY.................................................................. 3 3. INSTALLATION ................................................................................................................... 4 4. 5. 3.1. Selecting the place of installation.........................................
HMP230 SERIES User's Guide 6.3.7.2. 6.3.7.3. 6.3.7.4. 6.4. 7. 8. Setting the pressure for pressure compenstion of the HUMICAP sensor and for mixing ratio, wet bulb and enthalpy calculations ........................ 43 Setting the date ........................................................................................ 44 Setting the time ........................................................................................ 44 Serial commands ......................................................
M210225en-B 9. HMP230 SERIES User's Guide 8.4. Temperature channel adjustment with Pt 100 simulators................................... 67 8.4.1. Adjustment using serial commands .......................................................... 67 8.4.2. Adjustment using display commands........................................................ 68 8.4.3. Adjustment using LED commands............................................................ 68 8.5. Measurement of output currents using test points............
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HMP230 SERIES User's Guide M210225en-B 1. PRODUCT DESCRIPTION The HMP230 series transmitters are microprocessor based instruments for the measurement of relative humidity and temperature; from these variables they can calculate dewpoint temperature, absolute humidity, mixing ratio, wet bulb temperature and enthalpy. The transmitters have two analogue outputs and they can be connected to a serial bus via the RS 232C interface or through an RS 485/422 serial module or a current loop module.
HMP230 SERIES User's Guide Options Calculation variables Power supply Serial interface Display cover Filters Cable length Alarm output unit Cable connectors Installation aids 2 M210225en-B dewpoint temperature, mixing ratio, absolute humidity, wet bulb temperature, enthalpy 24 VDC (standard), (for 24 VAC, see page 23) 115/230 VAC RS 232C (standard), RS 485/422, current loop cover with or without local display & keypad sintered filter, PPS grid with steel netting, PPS grid 2, 5 or 10 metres Not with 115
HMP230 SERIES User's Guide M210225en-B TO BE NOTED WHEN MEASURING HUMIDITY In the measurement of humidity and especially in calibration it is essential that temperature equilibrium is reached. Even a small difference in temperature between the measured object and the sensor causes an error. If the temperature is +20 °C (+68 °F) and the relative humidity 50 %RH, a difference of ±1 °C between the measured object and the sensor causes an error of ±3 %RH.
HMP230 SERIES User's Guide M210225en-B 3. INSTALLATION 3.1. Selecting the place of installation Choose a place which gives a true picture of the environment or process, and is as clean as possible. Air should circulate freely around the sensor. A rapid air flow is recommended; it ensures that the sensor head and the ambient air are at the same temperature. Install the transmitter in a place where no cold or hot spot can develop.
HMP230 SERIES User's Guide M210225en-B 3.2. Mounting 3.2.1. Mounting the HMP231 The best position for mounting the HMP231 is with the probe head pointing downwards. Due to internal heat transfer, the transmitter should not be mounted with the probe pointing upwards. 133 104 Ø 6.5 Figure 2 Mounting holes in the HMP230 transmitter housing. 3.2.2.
HMP230 SERIES User's Guide M210225en-B NOTE During installation the sensor head must not be unsoldered from and again resoldered to the main printed board of the transmitter. This procedure may damage the humidity calibration of the transmitter. 3.2.3. HMP233 transmitter The HMP233 can be installed in ducts and channels with the help of the installation kit available; the kit consists of a flange, a supporting bar for the sensor head cable and screws for attaching the flange to the wall of a duct.
HMP230 SERIES User's Guide M210225en-B The sensor head can also be installed vertically. Figure 4 When a bushing is used, its size is selected according to the diameter of the sensor head; the diameter of the cable is increased by using e.g. tape at the bushing Vertical installation of the HMP233 sensor head 3.2.4. HMP234 transmitter The atmospheric pressure has an effect on mixing ratio, wet bulb temperature and enthalpy.
HMP230 SERIES User's Guide M210225en-B sealing washer fitting body nut tightening cone 4. Mark both the fitting body and the nut hex. A pen nut fitting body 5. Tighten the nut a further 30° (1/12 turn) or if you have a torque spanner tighten it with a torque of 80 ±10 Nm. NOTE: after detachment the nut must be tightened without increased effort. 30° 6. The tightening cone of the fitting body has to be cleaned and greased after every tenth detachment.
HMP230 SERIES User's Guide M210225en-B Fasten by threaded sleeve M22x1.5 Sealing by Metal sealing washer DIN 7603 threaded sleeve M22x1.5/Ø40 x15 sheet metal s=3...6mm Ø22+0.3 Check the thickness of the sheet metal according to the pressure of the chamber (boring) Fasten by Nut DIN 80705 nut DIN 80705-M22x1.5 (AISI 316) tightening torque=150 Nm ±10 Nm sealing by Metal sealing washer DIN 7603 1/2 -14 NPT NPT Conical pipe threaded connection ANSI/ASME B1.20.
HMP230 SERIES User's Guide M210225en-B 3.2.5.
HMP230 SERIES User's Guide M210225en-B Figure 8 Mounting the sensor head on a duct or channel. When the sensor head is installed in a duct or channel, the temperature difference between the air in the duct and outside it must be small as the sensor head conducts heat. 3.2.6. HMP237 transmitter HMP237 has a small size probe made of stainless steel. The sensor head withstands temperatures -40...180 ºC (-40...356 ºF) and pressure up to 10 bar (1MPa, 145 psi).
HMP230 SERIES User's Guide M210225en-B Temperature < 180ºC Pressure < 10 bar Figure 10. HMP237 cable installation. 1. Make a hole as described in duct installation, Figure 9. 2. Take out the rubber sealing from the AGRO Nr 1013.30.91. Drill a 6 mm hole in the middle of the rubber sealing. Cut the jacket of the sealing. 3. Thread the probe through the AGRO-fitting body and nut (without the cut rubber). 4. Set the cut rubber sealing through the cable between the fitting body and the nut. 5.
HMP230 SERIES User's Guide M210225en-B PROBE PUSHED DOWN PROBE UP cable length 2, 5 or 10 m ø5.5 clasp nut fitting body non leaking screw (A) (factory setting) or leak screw (B) (included in the package) 178 adjustment range120 mm 149 31 R1/2 ISO 7/1 29 ø13.5 Figure 11 HMP238 Probe dimensions (in mm) NOTE Take care not to damage the pipe of the probe. If the pipe is damaged, the probe head is less tight and it will not go through the clasp nut. 3.2.7.1.
HMP230 SERIES User's Guide M210225en-B The fitting body can be installed e.g. on standard pipe fittings (G 1/2 ISO 228/1) or on a thread in the process wall. If the wall thickness is more than 10.5 mm, it is recommended to use a welded sleeve (see Figure 14). Note that the minimum recommended distance of the fitting body and probe head is 40 mm (see Figure 12).
HMP230 SERIES User's Guide M210225en-B capped nut DIN 917-M22x1.
HMP230 SERIES User's Guide 3.2.7.2. M210225en-B Installing the probe through the ball valve assembly The best way to install the sensor head is through the ball valve assembly. Use a 1/2” ball valve assembly with a ball hole of ∅14 mm or more. In this kind of installation, it is not necessary to empty or shut down the process for installing or removing the sensor head. If the sensor head is installed in a process pipe, please note that the nominal size of the pipe must be at least 1 inch.
HMP230 SERIES User's Guide M210225en-B See Figure 16 through Figure 18 for detailed description of installation through the ball valve assembly. This installation is possible provided that the process pressure is less than 10 bars. Note also that if the sensor head is installed in a process pipe, the nominal size of the pipe must be at least 1 inch. • STEP I: mount the probe with the ball valve assembly closed; tighten the clasp nut manually bushing R1/2 cone/G1/2(40 bar) e.g.
HMP230 SERIES User's Guide M210225en-B 148 mm manual press tool adjustment range 120mm • STEP 2: open the ball valve assembly probe pipe ø5.5 marking groove clasp nut (hex 27 mm) 61 handle fitting ferrule fitting body (hex. 24 mm) leak screw (B) (hex. 1.5 mm) ø14 15 29 (40) ball of the ball valve O-ring > = ø13.
HMP230 SERIES User's Guide M210225en-B • STEP 3: push the probe head through the ball valve assembly into the process. If the pressure is high, use a manual press tool. Note that the sensor head must be pushed so deep that the filter is completely inside the process flow.
HMP230 SERIES User's Guide M210225en-B Figure 19 Installing the sensor head for by-pass measurements. When pushing the probe head through the ball valve assembly, be careful not to break the sintered filter. Open and close the ball valve assembly with the marking groove always in sight. In by-pass measurements, the clasp nut is tightened manually prior to pressing the probe through the valve. When the probe has been pressed through and the valve is open, the nut is tightened 50...
HMP230 SERIES User's Guide M210225en-B • slip the brass disk that has the bigger hole in it over the braid so that it rests against the cable insulation • slip the other brass disk over the wires to the middle of the braid flexible wires 0.5 mm² (AWG 20), stranded wires recommended 3 140 165 braid shielding tube brass disks braid 25 brass disks rubber ring nut D = Ø 7...
HMP230 SERIES User's Guide M210225en-B NOTE When the cable is grounded as above, the metallic parts of the sensor head, the shield of its cable, the transmitter housing and the shield of the signal cable to external system are all connected to each other. After this the whole system can be grounded from one point only. If the grounding is made via several points (sensor head, transmitter housing, signal cable), make sure that the different groundings are made to the same grounding potential.
HMP230 SERIES User's Guide M210225en-B Power supply 24 VDC 24 VAC (see page 23) with power supply module 115/230 VAC Output signals 0...20 mA, 4...20 mA 0...1 V, 0...5 V, 0...10 V Power supply ground (-) is connected to the housing with parallel connection of 15 nF capacitor and 300 kΩ resistor. See Appendix 2 on how to connect the power supply module to the transmitter. 3.4.1. Connection to a 24 VAC supply The HMP230 transmitters can also be connected to a 24 VAC supply without an external rectifier.
HMP230 SERIES User's Guide 4. M210225en-B COMMISSIONING When HMP230 transmitters leave the factory, their measurement ranges and output signals have already been scaled according to the order form completed by the customer. Units are calibrated at the factory and ready to operate when the power is turned on. If you take into use active current, voltage or serial bus outputs, make these connections first; Appendix 9 describes them in detail.
HMP230 SERIES User's Guide M210225en-B X15 CHANGE OF SETTINGS DISABLED OPENED COVER OF THE HMP 230 Figure 22 Location of the security lock jumper When the security lock jumper is connected, some commands cannot be used, see Chapter 5. If you wish to take into use variables that are not included in the configuration of your transmitter, contact Vaisala or a Vaisala representative. 4.3.
HMP230 SERIES User's Guide CH1 CH2 M210225en-B CH1 CH2 CH1 CH2 CURRENT OUTPUTS 0 ... 20 / 4 ... 20 mA CH1 CH2 CH1 CH2 VOLTAGE OUTPUTS 0 ... 5 V / 0 ... 10 V CH1 CH2 CH1 CH2 VOLTAGE OUTPUTS 0 ... 1 V CH1 CH2 CH1 0 ... 1 VOLTAGE OUTPUT CH2 CURRENT OUTPUT X15 OPENED COVER OF THE HMP230 Figure 23 Selecting the analogue outputs with jumpers. The software also has to be informed which outputs are in use.
HMP230 SERIES User's Guide M210225en-B X55 spare jumpers OPENED COVER OF THE HMP230 Figure 24 4.4. Spare jumpers Connecting the RS 232C serial bus RX GND TX NC X6 OPENED COVER OF THE HMP230 Figure 25 Serial bus connections To connect a PC to the HMP230 transmitters via the RS 232C serial bus, one of the following cables is required. The type of cable depends on the terminal and the connector type.
HMP230 SERIES User's Guide M210225en-B D9S PC 2 5 3 4 6 7 8 3 7 2 D25S 5 6 8 20 TERMINAL 3 D25P 7 2 Figure 26 TXD RXD TXD RXD TXD RXD TX GND RX TX GND RX HMP 230 TX GND RX Connection of cables When the serial bus has been connected between the PC and the transmitter, the PC is switched on. When using a PC, a terminal emulation program (e.g. Procomm Plus, Datastorm or Windows terminal) is started.
HMP230 SERIES User's Guide M210225en-B In calibrating or changing the settings of the transmitter it can be more convenient to use the connector X17, if connector X6 is already in use. This connector, however, transfers only RS 232C signals. If an RS 485/422 serial port module or a current loop module has been installed, it has to be removed before communicating through the X17 connector.
HMP230 SERIES User's Guide M210225en-B When the jumper is inserted the serial line factory settings become valid, but only temporarily. The transmitter must be given new settings; otherwise the transmitter uses the old, unknown settings after power-up. When the new settings have been given, the transmitter must be reset. The jumper must be removed before the transmitter is reset; if the jumper is in place when power is turned on, the transmitter does not work.
HMP230 SERIES User's Guide M210225en-B 5. CONNECTION TO PC Connect a serial connection cable to the appropriate connectors on your PC and in the HMP230 (see Appendix 11, connector X6). 5.1. Giving the communication parameters Give the communication parameters when using this terminal session for the first time; save them for future use. See instructions in the following tables. Giving parameters in Windows 3.
HMP230 SERIES User's Guide M210225en-B NOTE: select the connector according to your computer. Select the connector first and give then other parameters Giving the communication parameters in Windows 3.
M210225en-B HMP230 SERIES User's Guide Selecting the parameters in Windows 95 and NT 33
HMP230 SERIES User's Guide 6. M210225en-B COMMANDS The HMP230 transmitters use microprocessors; therefore their configuration can be set according to the user's needs. This is done through commands, either utilizing the menus on the local display or giving commands through the serial interface (see Appendix 1). Most often the commands are used to change the settings of the two analogue channels.
HMP230 SERIES User's Guide M210225en-B 6.2. LED commands NOTE If the transmitter has a display/keypad cover, the LED commands cannot be used. LED commands can be used to operate the transmitters in the field. These commands can be used in humidity and temperature calibration and calibration of the analogue outputs. Open the housing and press any one of the three press switches. The LEDs will light up for 2...3 seconds.
HMP230 SERIES User's Guide 6.3. M210225en-B Display/keypad commands 6.3.1. Display mode In the display mode the transmitters output measurements on the display; different quantities can be scrolled with the arrow keys according to the variables selected when ordering the transmitter. The first line is scrolled with button σ and the second line with button τ. All selections are stored with ENTER. The selected quantities appear on the display also after power failure.
HMP230 SERIES User's Guide M210225en-B 6.3.4. Analogue output commands 6.3.4.1. Selecting the output (mA/V) Disconnect the security lock jumper! • Select Mode in the main menu and Analog outputs in the Mode menu: • Select Mode ( mA / V ). The current settings for channel 1 are displayed: • If the settings are correct, press ENT.
HMP230 SERIES User's Guide M210225en-B 6.3.4.2. Selecting and scaling the analogue output quantities Disconnect the security lock jumper! • Select Mode in the main menu and Analog outputs in the Mode menu: • Select Scale. The quantity and scaling for channel 1 are displayed: • If the settings are correct, press ENT.
HMP230 SERIES User's Guide M210225en-B 6.3.5. Output via the serial bus 6.3.5.1. Turning the serial interface echo ON/OFF • Select More in the main menu, select More in the More menu and select Echo in the second More menu. • Use the arrow keys to select the right alternative and press ENT. 6.3.5.2. Serial bus settings • Select Seri in the main menu; the currently valid serial interface settings are displayed: • If the settings are correct, press ENT; the program returns to the display mode.
HMP230 SERIES User's Guide M210225en-B Selecting stop bits: Full duplex/half duplex: The processor does not allow the following combinations: • no parity, 7 data bits, 1 stop bit: if this combination is given the HMP230 program will change the number of stop bits to 2 • even or odd parity, 8 data bits, 2 stop bits: if this combination is given the program changes the number of stop bits to 1 NOTE The serial bus settings become effective only after reset. 6.3.5.3.
HMP230 SERIES User's Guide M210225en-B 6.3.5.4. Selecting the output units • Select Unit in the main menu: • Use the arrow keys to select the right alternative and press ENT. quantity RH = relative humidity T = temperature Td = dewpoint temperature a = absolute humidity x = mixing ratio h = enthalpy Tw = wet bulb temperature 6.3.5.5.
HMP230 SERIES User's Guide M210225en-B the connection returns the transmitter to POLL state. In POLL state the transmitter outputs measurement only when requested (command SEND aa). If the user has forgotten the address of the transmitter and the transmitter does not have a display, the transmitter has to be reverted to the factory settings (see Chapter 4.4.1). If the transmitter has a display, the settings can be checked through it. 6.3.6.1.
HMP230 SERIES User's Guide M210225en-B 6.3.7. Others 6.3.7.1. Setting the averaging time Disconnect the security lock jumper! With command FILT the transmitter can be given the averaging time during which the individual measurement samples are integrated to get an averaged reading. The time can be set in seconds within the range of 0 - 1024 (0 = no averaging time = factory setting).
HMP230 SERIES User's Guide M210225en-B • Select More in the main menu: • Select Pres: • Pressing ENT returns the program to the main menu without changing the pressure reading. • If the pressure needs to be changed, press CL; enter the new pressure with the arrow keys 6.3.7.3. Setting the date • Select More in the main menu; select Date in the More menu: • If the date is correct, acknowledge it by pressing ENT; this takes the program back to the More menu.
HMP230 SERIES User's Guide M210225en-B • If the time needs to be changed, press CL. − first the hours (14) start flashing; use the arrow keys to change them and press ENT − the minutes (25) start flashing; use the arrow keys to change them and press ENT − the seconds (32) start flashing; use the arrow keys to change them and press ENT NOTE The transmitter does not have a real-time clock with backup battery. This means that the date and time settings are not permanent.
HMP230 SERIES User's Guide 6.4. M210225en-B Serial commands More detailed descriptions of the serial commands can be found in Appendix 1. Here only the most commonly used command sequences are described. The instructions on how to connect the HMP230 transmitters to serial bus are given in Chapter 4.4. Pressing ESC always interrupts any serial command being given. In the commands means carriage return. 6.4.1. Analogue output commands 6.4.1.1.
HMP230 SERIES User's Guide M210225en-B 6.4.1.2. Selecting and scaling the analogue output quantities Disconnect the security lock jumper! ASEL xxx yyy xxx yyy = = channel 1's quantity channel 2's quantity: RH = relative humidity T = temperature Td = dewpoint temperature Abs = absolute humidity Mix = mixing ratio h = enthalpy Tw = wet bulb temperature Example: relative humidity selected on channel 1 and temperature on channel 2 >ASEL RH T Ch1(RH) lo Ch1(RH) hi Ch2(T ) lo Ch2(T ) hi 6.4.1.
HMP230 SERIES User's Guide M210225en-B 6.4.2. Output via the serial bus 6.4.2.1. Starting the measurement output R Starts output of measurements to the peripheral devices (RUN mode); the only command that can be used is S (stop). The output mode can be changed with command FORM (see Appendix 1). 6.4.2.2. Stopping the measurement output S Ends the RUN mode; after this command all other commands can be used. 6.4.2.3.
HMP230 SERIES User's Guide M210225en-B 6.4.2.4. Setting the output interval for the RUN mode INTV xxx yyy xxx = yyy = output interval (0...255) 0: no pause between outputs unit (s, min or h) Example: output interval is changed into 10 minutes >INTV 10 min Output intrv. : 10 min 6.4.2.5.
HMP230 SERIES User's Guide M210225en-B 6.4.2.6. Selecting the output units UNIT x x = m(etric units) n(on-metric units) quantity RH = relative humidity T = temperature Td = dewpoint temperature a = absolute humidity x = mixing ratio h = enthalpy Tw = wet bulb temperature 6.4.2.7.
HMP230 SERIES User's Guide M210225en-B 6.4.2.9. Setting the calculation mode Disconnect the security lock jumper! FROST ON/OFF This command is used to select whether the transmitter calculates the frostpoint or the dewpoint (default) reading at dewpoint temperatures below 0 °C. Select FROST ON for frostpoint and FROST OFF for dewpoint calculations. For example: >Frost Frost : ON >Frost off Frost : OFF >Frost on Frost : on > 6.4.2.10. Resetting the transmitter RESET 6.4.3.
HMP230 SERIES User's Guide M210225en-B Example: setting STOP state >SMODE STOP Serial mode : STOP 6.4.3.2. OPEN & CLOSE OPEN nn nn = address of the transmitter (0...
HMP230 SERIES User's Guide M210225en-B 7. CALIBRATION The HMP230 transmitters have been fully calibrated at the factory and there should be no immediate need to calibrate them again. The transmitters should be calibrated only if there is reason to believe that the adjustments of the transmitter have changed. The adjustments of the temperature measurement channel and the analogue outputs are particularly stable and in normal circumstances there is no need to recalibrate them.
HMP230 SERIES User's Guide M210225en-B 7.1.1. One point calibration procedure The HMI38 humidity data processor or the HMI41 indicator can be used as a one-point field calibrator. Two point calibration using the HMI38 is also possible if two different humidity points (differing more than 50 %RH from each other) can be provided. The HMI38 is connected to an HMP230 transmitter using an appropriate reference connection cable. The necessary correction factors are automatically stored in the HMP230 memory.
HMP230 SERIES User's Guide M210225en-B 7.1.1.2. • With display/keypad commands Make sure that the sensors of the transmitter and the reference instrument are close to each other. Allow enough time for the sensor heads to stabilize to the measurement conditions. Disconnect the security lock jumper! • 7.1.1.3. • Select Cali in the main menu and then RH cal; select Not changed and then one-point offset correction RH 1 point cal.
HMP230 SERIES User's Guide M210225en-B 7.1.2.1. • With serial commands Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize. Remove the filter cap on the transmitter. Disconnect the security lock jumper! • Insert the sensor head into a measurement hole of the LiCl chamber in the humidity calibrator. • Wait at least 30 minutes. • Give command CRH , enter the first point value and press . >CRH RH : xx.
HMP230 SERIES User's Guide M210225en-B • Insert the sensor head into a measurement hole of the NaCl chamber. • Wait at least 30 minutes. • If necessary, change the second point reading with the arrow keys and press ENT. 7.1.2.3. • With LED commands Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize. Remove the filter cap on the transmitter.
HMP230 SERIES User's Guide M210225en-B • Give command FCRH , enter the first point value and press : >FCRH RH : xx.x Ref1 ? yy.y Press any key when ready... • The stabilization of the sensor to the reference humidity can be monitored by giving c : RH : 11.9 Ref1 ? RH : 11.5 Ref1 ? RH : 11.5 Ref1 ? Press any key when c c 11.3 ready... • Insert the sensor head into a measurement hole of the NaCl chamber. • Wait at least 30 minutes.
HMP230 SERIES User's Guide M210225en-B • Wait at least 30 minutes. • Connect an ammeter/voltmeter to the analogue outputs (connector X2). Give command l¡¡¡. At the first calibration point the LED on the left flashes; adjust the first point with the arrow switches to the value given in the calibration table (Chapter 7.1.4) and press ENT switch. • Insert the sensor head into a measurement hole of the NaCl chamber. • Wait at least 30 minutes.
HMP230 SERIES User's Guide 7.2. M210225en-B Temperature calibration The temperature channel has been calibrated at the factory and since it is very stable, calibration should be performed only when there is strong reason to believe that the adjustments have changed. Temperature calibration should be done against some accurate temperature reference. It can be done either using the press switches inside the housing, through the serial bus or the menus on the local display.
HMP230 SERIES User's Guide M210225en-B • If you want to see how the sensor stabilizes to the reference temperature, enter c instead of the first reference: T : 0.90 Ref1 ? c T : 0.55 Ref1 ? c T : 0.55 Ref1 ? 0.0 Press any key when ready... • 7.2.1.2. • After giving the correct temperature value (Ref1) and pressing , press any key and press .
HMP230 SERIES User's Guide M210225en-B 7.2.2. Two point temperature calibration 7.2.2.1. • With serial commands Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize. Remove the filter cap prior to calibration. Disconnect the security lock jumper! • Check the transmitter against the lower reference. • Give command CT , enter the first point value and press : >CT T : xx.x Ref1 ? yy.
HMP230 SERIES User's Guide M210225en-B • Check that the reading corresponds with the reading of the reference instrument. If not, adjust the second point. • If necessary, change the second point reading with the arrow keys and press ENT. 7.2.2.3. • With LED commands Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize. Remove the filter cap prior to calibration. Disconnect the security lock jumper! 7.3.
HMP230 SERIES User's Guide M210225en-B >ACAL Ch1 U1 ( Ch1 U2 ( Ch2 U1 ( Ch2 U2 ( V V V V ) ) ) ) ? ? ? ? 2.233 8.25 2.218 8.23 7.3.2. With display/keypad commands Disconnect the security lock jumper! • Connect an ammeter/voltmeter to the output of channel 1, select Cali in the main menu and Analog outputs in the Cali menu. The following is displayed (the quantity can be either mA or V): • Enter the measured lower end current/voltage on channel 1.
HMP230 SERIES User's Guide M210225en-B • the LED on the left flashes; set the low end of channel 1 with the arrow keys and press ENT • the second LED from the left flashes; set the high end of channel 1 with the arrow keys and press ENT • the LED on the left flashes; set the low end of channel 2 with the arrow keys and press ENT • the second LED from the left flashes; set the high end of channel 2 with the arrow keys and press ENT The analogue outputs are calibrated to ensure that outputs are corr
HMP230 SERIES User's Guide 8. MAINTENANCE 8.1. Reference measurements M210225en-B Reference measurements are needed to verify whether the transmitter readings are within specifications. This way the user can check if the transmitter needs calibration or service. The reference meter should preferably use the same technology as the instrument checked, i.e. transmitters with capacitive sensors should be checked with instruments using capacitive sensors.
HMP230 SERIES User's Guide M210225en-B When errors have occurred, the transmitter outputs the error code (see Appendix 5 for all error messages): >ERRS E40 f ( all ) > 8.3. out of range Changing the HUMICAP® sensor and the filter Remove the damaged sensor and insert a new one. Handle the sensor by the plastic socket. DO NOT TOUCH THE SENSOR PLATE. After sensor change the humidity calibration must be made according to the instructions in Chapter 7.1.3.
HMP230 SERIES User's Guide M210225en-B Set the Pt 100 simulator at the highest temperature to be calibrated and press any key. Enter the second point (gain) reference reading. If second reference is not needed, press to complete one point offset correction. 8.4.2. Adjustment using display commands Select Cali in the main menu and then T cal; select two-point calibration T 2 point cal. Change the first point reading with the arrow keys and press ENT.
HMP230 SERIES User's Guide M210225en-B Measurement of output currents using test points CH2- CH2+ CH1- If a current output has been connected e.g. to a process computer, the output current cannot be measured at the output connector X2 without disconnecting the external load. The output current can, however, be measured at test points CH1+/CH1- and CH2+/CH2- without disconnecting the output wires.
HMP230 SERIES User's Guide 8.6. M210225en-B Adjusting the contrast of the display The contrast of the display can be adjusted using the trimmer "LCD display contrast" located next to the press switches.
HMP230 SERIES User's Guide M210225en-B 9. TECHNICAL DATA 9.1. Relative humidity Measuring range 0...100 %RH Accuracy (including nonlinearity and repeatability) maximum achievable accuracy when calibrated against high quality, certified humidity standards: ±1 %RH (0...90 %RH) ±2 %RH (90...100 %RH) when calibrated against salt solutions (ASTM E104-85): ±2 %RH (0...90 %RH) ±3 %RH (90...100 %RH) Response time (90 %) at +20 °C in still air (with sintered filter) Sensors HUMICAP®K: HUMICAP®KC: 9.2. 9.3.
HMP230 SERIES User's Guide M210225en-B Typical ranges - HMP233/234/235/237/238 dewpoint temperature -40...+100 °C mixing ratio 0...500 g/kg dry air absolute humidity 0...600 g/m3 wet bulb temperature 0...+100 °C enthalpy -40…+1500 kJ/kg Accuracies of the calculated quantities depend on the accuracies of the measured quantities: relative humidity and temperature. In the tables below their accuracies are ±2 %RH and ±0.2 °C. Accuracy of dewpoint temperature (°C) Temp.
HMP230 SERIES User's Guide M210225en-B Accuracy of wet bulb temperature (°C) Temp. -40 -20 0 20 40 60 80 100 120 140 160 Relative humidity 10 20 0.20 0.20 0.21 0.21 0.27 0.28 0.45 0.45 0.84 0.77 1.45 1.20 2.23 1.64 3.06 2.04 3.85 2.40 4.57 2.73 5.25 3.06 30 0.20 0.22 0.28 0.45 0.72 1.03 1.32 1.58 1.81 2.03 2.25 40 0.20 0.22 0.29 0.44 0.67 0.91 1.13 1.31 1.48 1.65 1.82 50 0.20 0.22 0.29 0.44 0.64 0.83 0.99 1.14 1.28 1.41 1.55 60 0.20 0.22 0.29 0.44 0.61 0.76 0.89 1.01 1.13 1.25 1.37 70 0.20 0.23 0.
HMP230 SERIES User's Guide 9.6. M210225en-B Electronics User interface 3 keys and 4 LEDs inside the housing or local display keypad Display 2 x 16 character alphanumeric high-contrast, wide view angle LCD 3.85 mm (0.15") character height 74 Keyboard 1 x 4 keypad Connections screw terminals, 0.5 mm2 wires (AWG 20), stranded wires recommended Operating voltage 24 VDC (20...
HMP230 SERIES User's Guide M210225en-B Mechanics Housing material G-AlSi12 (DIN 1725) Housing classification IP 65 (NEMA 4) Bushing for 7...10 mm diameter cable (8 x 0.5 mm2 shielded cable) Sensor protection stainless steel sintered filter (part no. 16452) PPS grid with stainless steel netting (part no. 16720) PPS grid (part no. 16562) Housing dimensions 145 x 120 x 65 mm Sensor head dimensions See figures 34 to 37. HMP233 cable diameter +80 °C cable +120 °C cable 6 mm 5.
HMP230 SERIES User's Guide M210225en-B M22x1.5 HMP233 sensor head dimensions Ø 13.5 Figure 34 29 Fitting body hex=27 14 120 170 Ø 25 Ø 13.5 HMP234 sensor head dimensions Ø 13.5 Figure 35 cable length 2000, 5000 or 10000 mm Nut hex=32 29 Ø 9.5 2.5 30 Ø 50 Ø 75 220 Figure 36 HMP235 sensor head dimensions Figure 37 HMP237 sensor head dimensions. HMP238 sensor head dimensions, see page 13.
HMP230 SERIES User's Guide M210225en-B 9.8. Electromagnetic compatibility HMP230 series transmitters fulfill the standard EN 61326-1:1997 +Am 1:1998, Electrical equipment for measurement, control and laboratory use EMC requirements; Industrial environment (Generic environment for HMP233 with low temperature sensor cable).
HMP230 SERIES User's Guide 10.
M210225en-B 11. HMP230 SERIES User's Guide FACTORY CALIBRATION AND REPAIR SERVICE Vaisala SSD Service Centres Vaisala SSD Service, Vanha Nurmijärventie 21 FIN-01670 Vantaa, FINLAND. Phone: +358 9 8949 2758, Fax +358 9 8949 2295, ssdservice@vaisala.com Vaisala KK, 42 Kagurazaka 6-Chome, Shinjuku-Ku, Tokyo 162-0825, JAPAN. Phone: +81 3 3266 9611, Fax +81 3 3266 9610, aftersales.asia@vaisala.com Vaisala Inc., 100 Commerce Way, Woburn, MA 01801-1068, USA.
HMP230 SERIES Appendix 1: Serial commands M210225en-B SERIAL COMMANDS 1. ANALOGUE OUTPUT COMMANDS .................................................................................. 81 AMODE Setting the analogue outputs.................................................................... 81 ASEL Scaling the analogue outputs ................................................................... 82 ASCL Scaling the analogue outputs ................................................................... 83 2.
HMP230 SERIES Appendix 1: Serial commands M210225en-B 1. ANALOGUE OUTPUT COMMANDS AMODE Setting the analogue outputs Disconnect the security lock jumper! AMODE a bb.bbb cc.ccc d ee.eee ff.fff a = bb.bbb = cc.ccc = d = ee.eee = ff.fff = channel 1: U = voltage output I = current output lower limit of channel 1 upper limit of channel 1 channel 2: U = voltage output I = current output lower limit of channel 2 upper limit of channel 2 The bb.bbb, cc.ccc, ee.eee and ff.
HMP230 SERIES Appendix 1: Serial commands ASEL M210225en-B Scaling the analogue outputs Disconnect the security lock jumper! ASEL xxx yyy xxx yyy = = channel 1's quantity channel 2's quantity: RH = relative humidity T = temperature Td = dewpoint temperature Abs = absolute humidity Mix = mixing ratio h = enthalpy Tw = wet bulb temperature Example: relative humidity selected on channel 1 and temperature on channel 2 >ASEL RH T Ch1 (RH) lo 0.000 %RH? Ch1 (RH) hi 100.
HMP230 SERIES Appendix 1: Serial commands M210225en-B ASCL Scaling the analogue outputs Disconnect the security lock jumper! ASCL Scales the outputs selected on channels 1 and 2. For example, scaling relative humidity on the range of 0...100 %RH and temperature -40...+160 °C: >ASCL Ch1 (RH) lo Ch1 (RH) hi Ch2 (T ) lo Ch2 (T ) hi 0.000 %RH? 100.000 %RH ? 0.000 'C ? -40 100.000 'C ? 160 The output scales can also be given directly with the ASCL command. ASCL aaa.a bbb.
HMP230 SERIES Appendix 1: Serial commands 2. M210225en-B CALIBRATION COMMANDS CRH Relative humidity calibration Disconnect the security lock jumper! CRH With this command the transmitters can be calibrated against a reference. A one-point calibration can be done against an accurate transfer standard in the field and a two-point calibration using saturated salt solutions in controlled conditions. A two-point calibration is performed as follows: >CRH RH : 12.00 Ref1 ? 11.
HMP230 SERIES Appendix 1: Serial commands M210225en-B The command can also be divided into two commands, so the computer can be used for other purposes while waiting for the sensor to stabilize to the higher humidity. >FCRH 1 RH : 1.90 Ref1 ? 11.3 FCRH 2 ... RH : 76.30 Ref2 ? 74.9 If the stabilization of the sensor to the humidity in the calibrator needs to be monitored, the measurement output can be repeated by giving command c at Ref1 and Ref2: >FCRH RH : 12.
HMP230 SERIES Appendix 1: Serial commands ACAL M210225en-B Calibrating the analogue outputs Disconnect the security lock jumper! ACAL Calibrates the outputs selected on channels 1 and 2. The output is measured and the measured values (mA or V) entered as calibration coefficients. For example, calibrating the outputs when 0...10 V signal has been selected on both channels (set with AMODE command): >ACAL Ch1 U1 (V Ch1 U2 (V Ch2 U1 (V Ch2 U2 (V L ) ) ) ) ? ? ? ? 0.123 9.98 0.
HMP230 SERIES Appendix 1: Serial commands M210225en-B NOTE The temperature unit in offset correction is always degrees Centigrade, even if the transmitter is using nonmetric units (Fahrenheit) in its measurement output. 3. OUTPUT VIA THE SERIAL BUS R Starting the measurement output R Starts output of measurements to the peripheral devices (PC display or printer); output interval is set with command INTV. The output format depends on the transmitter configuration and which variables are in use.
HMP230 SERIES Appendix 1: Serial commands SEND M210225en-B Outputting a reading once SEND in STOP state or SEND aa aa = in POLL state address of the transmitter when more than one transmitter is connected to a serial bus (0...99; set with command ADDR) Outputs the current measurement readings via the serial line. The output format depends on which parameters the transmitter can output. Output types are: RH= 21.9 %RH T= 23.9 'C RH= 21.9 %RH T= 23.9 'C Td=0.9 'C RH= 21.9 %RH T=23.9 'C a=4.
HMP230 SERIES Appendix 1: Serial commands M210225en-B If there are no error messages, only a prompt is displayed: >ERRS > If errors have occurred, the transmitter outputs the error code (see Appendix 5 for error messages): >ERRS E40 f ( all ) > ECHO out of range Turning the serial interface echo ON/OFF ECHO xxx xxx = ON or OFF When the echo is off, the commands given through the serial interface or the prompt > cannot be seen on the display.
HMP230 SERIES Appendix 1: Serial commands FORM M210225en-B Setting the output format FORM "xxx...xxx" ? zzz...zzz xxx...xxx zzz...zzz = = old format new format The FORM command sets the format of the outputs generated in RUN state and by SEND command. Please note that capital and small letters have different meanings. \UU..UU\ \TT..TT\ \DD..DD\ \AA..AA\ \XX..XX\ \WW..WW\ \HH..HH\ \uu..
HMP230 SERIES Appendix 1: Serial commands M210225en-B The output is then: 47.4 22.4 10.6 9.4 8.0 15.4 FTIME Adding time to output FTIME xxx xxx = ON or OFF When FTIME is activated, the current time is output at the beginning of the output line. The time is set with command TIME. After RESET or power on the current time is 00:00:00. Activating the time output >ftime on Form. time : ON >intv 5 s Output intrv. : 5 >r 09:31:13 RH= 19.4 %RH 09:31:18 RH= 19.
HMP230 SERIES Appendix 1: Serial commands FDATE M210225en-B Adding date to output FDATE xxx xxx = ON or OFF When FDATE is activated, the current date is output at the beginning of the output line. The time is set with command DATE. After RESET or power on the current date is 1991-01-01. Activating the date output >fdate on Form. date >r 1995-03-10 1995-03-10 1995-03-10 1995-03-10 1995-03-10 ... : RH= RH= RH= RH= RH= ON 21.1 21.3 23.1 22.2 20.6 %RH %RH %RH %RH %RH T= T= T= T= T= 26.0 26.
HMP230 SERIES Appendix 1: Serial commands M210225en-B The processor does not allow the following combinations: • no parity, 7 data bits, 1 stop bit: if this combination is given the HMP230 programme will change the number of stop bits to 2 • even or odd parity, 8 data bits, 2 stop bits: if this combination is given the programme changes the number of stop bits to 1 NOTE The serial bus settings become effective only after reset. When the half-duplex mode is set, it will automatically turn the echo off.
HMP230 SERIES Appendix 1: Serial commands ADDR M210225en-B Setting the transmitter address ADDR aa aa = address (0...99) The address is used when more than one transmitter is connected to one serial bus. The ADDR command makes it possible to communicate with one transmitter at a time in POLL state.
HMP230 SERIES Appendix 1: Serial commands M210225en-B 3.1 Operation modes SMODE Setting the serial interface SMODE xxxx xxxx = STOP, RUN or POLL In STOP mode: measurements output only by command, all commands can be used In RUN mode: outputting automatically, only command S can be used In POLL mode: measurements output only with command SEND.
HMP230 SERIES Appendix 1: Serial commands M210225en-B When more than one transmitter is connected to the same serial bus, the POLL mode makes it possible to communicate with the transmitters. For example, a relative humidity calibration is performed at transmitter 2 ( = ASCII 7): >OPEN 2 'HMP nn line opened >CRH ...
HMP230 SERIES Appendix 1: Serial commands M210225en-B 4. OTHERS ITEST Testing the analogue outputs ITEST or ITEST a b a b = = current/voltage of channel 1 current/voltage of channel 2 The operation of the analogue outputs can be tested by forcing the outputs to given values which can then be measured with a current/voltage meter from the analogue outputs. The response to ITEST command gives six outputs/parameters.
HMP230 SERIES Appendix 1: Serial commands FILT M210225en-B Setting the averaging time Disconnect the security lock jumper! FILT nnnn nnnn = averaging time (0 - 1024 seconds) This command is used to set and inspect the averaging time during which the individual measurement samples are integrated to get an averaged reading. The time can be set in seconds within the range of 0 - 1024 (0 = no averaging time).
HMP230 SERIES Appendix 1: Serial commands M210225en-B When the command is given, the transmitter first gives the currently used pressure; after this a new value can be entered or the old one acknowledged: >PRES Pressure : 1013.25 ? 1000.00 When the currently used pressure is known, a new pressure can also be entered directly: >PRES 1010 Pressure : 1010 NOTE If the pressure setting is frequently adjusted, e.g.
HMP230 SERIES Appendix 1: Serial commands DATE M210225en-B Setting the date DATE For example, to enter a new date: >DATE Current date is 1993-01-30 Enter new date (yyyy-mm-dd) : 1993-06-12 When the current date is asked, the new date is passed with .
HMP230 SERIES Appendix 1: Serial commands M210225en-B TIME Setting the time TIME For example, to enter a new time: >TIME Current time is 01:35:54 Enter new time (hh:mm:ss) : 13:25:56 When the current time is asked, the new time is passed with . VERS Name and version of the programme VERS For example: >VERS HMP 230 / x.yy where x.yy is the programme version. ? Outputting the transmitter settings ? For example: >? HMP 230 / 3.
HMP230 SERIES Appendix 1: Serial commands ?? M210225en-B Outputting the transmitter settings also in POLL mode ?? Command ?? outputs the same information as command ? but it works also when the transmitter has been set to POLL mode. However, if there are more than one addressed transmitters connected to the serial bus, they all will respond at the same time and the output on the screen will be chaotic.
HMP230 series Appendix 2: Installing the power supply module M210225en-B INSTALLING THE POWER SUPPLY MODULE The mains power connection may be connected to the power supply module only by an authorized electrician. A readily accessible disconnect device shall be incorporated in the fixed wiring (IEC 950). 1. Remove the plastic plug in the transmitter housing and replace it with the cable gland. 2. Fasten the power supply module to the bottom of the housing with four screws 3.
HMP230 series Appendix 2: Installing the power supply module M210225en-B Peel the correct power supply voltage from the sticker enclosed in the power supply module package and attach it on the instrument label to indicate that the supply voltage has been changed. NOTE 1 The power supply module is not recommended to be used in the HMP231 transmitters NOTE 2 The power supply module cannot be used in transmitters with the regaining option.
M210225en-B HMP230 series Appendix 2: Installing the power supply module TECHNICAL SPECIFICATIONS Operating voltage 115 VAC (93...127 V) 230 VAC (187...253 V) Connections screw terminals for 0.5... 2.5 mm2 wire (AWG 20...14) Bushing for 7...12 mm diameter cable Indicator PWR ON LED on power supply module board Operating temperature range -40...+45 °C Storage temperature range -40...
HMP230 SERIES Appendix 3: RS 485/422 serial port module M210225en-A INSTALLING AND USING THE RS 485/422 SERIAL PORT MODULE 1. INSTALLATION ...................................................................................................... 107 2. OPERATION ........................................................................................................... 108 3. NETWORK CONFIGURATION ............................................................................... 110 Single loop operation....
HMP230 SERIES Appendix 3: RS 485/422 serial port module M210225en-A 1. INSTALLATION Switch the transmitter off. Resistors R2, R3 and R4 between connectors X4 and X5 in the component board in the cover of the transmitter are removed with side-cutting pliers. The module is plugged in connectors X4 and X5 on the main board of the HMP230 transmitter; connector X1 on the module board to connector X4 and connector X2 to connector X5.
HMP230 SERIES Appendix 3: RS 485/422 serial port module 2. M210225en-A OPERATION The HMP230 transmitters can either be given an address or operated without an address. Both single and dual loop wiring with half duplex connection can be used. No address is needed when only one HMP230 transmitter is used; when several transmitters are connected to the same line, each transmitter must be given an address in the initial configuration.
M210225en-A HMP230 SERIES Appendix 3: RS 485/422 serial port module The RS 485/422 module has separate lines for transmitting and receiving, but they can be connected together with jumpers. Dual loop connection is the factory setting; when a single loop connection is used, the positions of jumpers in connector X4 on the module must be changed. The HI of the receiving line is approx. 0.6 V and its LO is approx. 0 V in order to reduce noise on the lines when no data is transferred (idling).
HMP230 SERIES Appendix 3: RS 485/422 serial port module 3. M210225en-A NETWORK CONFIGURATION Single loop operation Bi-directional data on one pair is one of the great advantages of the RS 485 line. Set jumpers in connector X4 on the module board as shown in the figure below. X1 X2 X4 X4 This jumper setting connects RX HI to TX HI and RX LO to TX LO and selects only one common line termination. The HI and LO terminals of the RX pair can now be used for operation.
HMP230 SERIES Appendix 3: RS 485/422 serial port module M210225en-A • Set the address of the transmitter; it can be any number between 1 and 99. In this example the address is 22: >addr 22 Address : • 22 Set the serial bus settings according to your network specifications. This setting will become valid after next RESET or power off: >seri 2400 e 7 1 h 2400 E 7 1 HDX • Set the transmitter in POLL mode: >smode poll Serial mode : POLL NOTE 1 The SMODE command must be given last.
HMP230 SERIES Appendix 3: RS 485/422 serial port module M210225en-A Dual loop operation The following procedure must be repeated with all transmitters. • Open the transmitter cover. • Pull out the RS 485/422 serial port module, if it is already mounted. • Set the serial port of the terminal to 4800 baud, even parity, seven data bits and one stop bit, full duplex (4800 E 7 1 FDX). • The serial settings of the transmitter must also be 4800 E 7 1 FDX and the transmitter must be in STOP mode.
HMP230 SERIES Appendix 3: RS 485/422 serial port module M210225en-A NOTE 1 The SMODE command must be given last. NOTE 2 The transmitter outputs no prompt (>) after the SMODE POLL command and it only reacts to commands which include its address. • Check that the transmitter responds to its address: >send 22 RH= 24.4 %RH T= 29.1 'C • Disconnect the terminal. • Check that the jumpers in connector X4 are in the correct places: X1 X2 X4 X4 • Remount the RS 485/422 serial module. • Close the cover.
HMP230 SERIES Appendix 3: RS 485/422 serial port module 4. M210225en-A CHECKING THE SERIAL PORT NETWORK OPERATION Normally measurement readings are asked when the transmitter is in POLL mode; then the command must include the address of the transmitter. If the settings need to be changed, the transmitter is switched to STOP mode with command OPEN; commands can then be given without address. When the line to the transmitter is closed, it returns to POLL mode.
HMP230 SERIES Appendix 3: RS 485/422 serial port module M210225en-A POLL mode If a transmitter has been set to POLL mode, it will respond only to commands sent with its address: send 22 RH= 24.4 %RH T= 29.1 'C Addresses from 1 to 99 can be used. According to the RS 485/422 standard a maximum of 32 devices can be connected on same bus, but the number can be increased if the line length and/or baud rate is reduced. More than one baud rate can be used on an RS 485 line. E.g.
HMP230 SERIES Appendix 3: RS 485/422 serial port module 5. SPECIFICATIONS Connections on the main board Berg sockets screw terminals 0.5 mm² wires, stranded wires recommended Assembly plug-in module Board dimensions 40 x 28 mm Operating mode (single or dual pair wiring) half duplex Network: network type cable type line length max. number of devices data speed operating mode common mode voltage range 116 M210225en-A daisy chain twisted pair 1000 m (3000 ft) 32 devices on line 9600 baud max.
M210225en-B HMP230 SERIES Appendix 4: Digital current loop module INSTALLING AND USING THE DIGITAL CURRENT LOOP MODULE 1. INSTALLATION.......................................................................................................118 2. OPERATION............................................................................................................119 3. NETWORK CONFIGURATION ................................................................................121 Single loop operation .........
HMP230 SERIES Appendix 4: Digital current loop module 1. M210225en-B INSTALLATION Switch the transmitter off. Resistors R2, R3 and R4 between connectors X4 and X5 in the component board in the cover of the transmitter are removed with side-cutting pliers. The module is plugged in connectors X4 and X5 on the main board of the HMP230 transmitter; connector X1 on the module board to connector X4 and connector X2 to connector X5.
HMP230 SERIES Appendix 4: Digital current loop module M210225en-B 2. OPERATION The HMP230 transmitters can either be given an address or operated without an address. Both single and dual loop wiring with half duplex connection can be used. No address is needed when only one HMP230 transmitter is used; when several transmitters are connected to the same line, each transmitter must be given an address in the initial configuration.
HMP230 SERIES Appendix 4: Digital current loop module M210225en-B The digital current loop module has separate lines for transmitting and receiving. Both single loop wiring and dual loop wiring can be used (see figure). With dual loop connection, it is possible to have a few more transmitters on the same loop pair. A single loop connection has simpler wiring. Data transmission is achieved by switching the loop current on and off.
HMP230 SERIES Appendix 4: Digital current loop module M210225en-B 3. NETWORK CONFIGURATION Single loop operation Bi-directional data on one pair and galvanic isolation are the advantages of the current loop. Single pair/dual pair use is configured through wiring (see figure on page 3). Supplying power from the same end to the loops prevents crossover voltages. • Connect wires to the transmitter's serial connector. • Check the wiring. The following procedure must be repeated with all transmitters.
HMP230 SERIES Appendix 4: Digital current loop module • M210225en-B Set the transmitter in POLL mode: >smode poll Serial mode : POLL NOTE 1 The SMODE command must be given last. NOTE 2 The transmitter outputs no prompt (>) after the SMODE POLL command and it only reacts to commands which include its address. • Check that the transmitter responds to its address: send 22 RH= 24.4 %RH T= 29.1 'C • Disconnect the terminal. • Remount the digital current loop module. • Close the cover.
HMP230 SERIES Appendix 4: Digital current loop module M210225en-B Dual loop wiring • Set the address of the transmitter, it can be any number between 1 and 99. In this example the address is 22: >addr 22 Address : • 22 Set the serial bus settings according to your system.
HMP230 SERIES Appendix 4: Digital current loop module 4. M210225en-B CHECKING THE SERIAL PORT NETWORK OPERATION Normally measurement readings are asked when the transmitter is in POLL mode; then the command must include the address of the transmitter. If the settings need to be changed, the transmitter is switched to STOP mode with command OPEN; commands can then be given without address. When the line to the transmitter is closed, it returns to POLL mode.
HMP230 SERIES Appendix 4: Digital current loop module M210225en-B POLL mode If a transmitter has been set to POLL mode, it will respond only to commands sent with its address: send 22 RH= 24.4 %RH T= 29.1 'C Addresses from 1 to 99 can be used. According to the 20 mA current loop standard current flows with no transmission on line. A maximum of 6 devices can be connected on same single loop line, but the number can be increased to 9 by using dual loop wiring.
HMP230 SERIES Appendix 4: Digital current loop module 5. SPECIFICATIONS Galvanic isolation 1500 VAC/DC max. (1 min) Loop supply voltage 40 V max. Loop supply current must be current limited 20 mA nominal Operating loop voltage requirement 4 V/each transmitter (TX+/TX-) on the loop 2 V/each receiver (RX+/RX-) on the loop Loop current 12...30 mA (space) 0...2 mA (mark) 30 mA max. Connections on the main board Berg sockets screw terminals 0.
M210225en-B HMP230 SERIES Appendix 5: Error messages ERROR MESSAGES 1. ERROR TYPES .......................................................................................................128 1.1 Errors after reset ........................................................................................128 1.2 Errors during operation .............................................................................
HMP230 SERIES Appendix 5: Error messages 1. M210225en-B ERROR TYPES The HMP230 transmitters go through a self-diagnostics procedure when the power is switched on. When the procedure does not reveal any errors or faults, the transmitter starts operating normally. If errors or faults are found, the transmitter outputs an error message. Possible errors can also be checked with command ERRS (see Appendix 1).
HMP230 SERIES Appendix 5: Error messages M210225en-B E21 PRB EEPROM ackn. error - no connection to the EEPROM including calibration information can be formed. Send the transmitter to Vaisala for repair. E22 PRB EEPROM checksum error ackn. error checksum error = = EEPROM is faulty check sum is erroneous - possibly due to an electrical disturbance an erroneous calibration parameter value or an incorrect checksum has been stored in the EEPROM including the calibration information.
HMP230 SERIES Appendix 5: Error messages 1.2 M210225en-B Errors during operation Two types of errors are possible during operation of the transmitters. The first type indicates that no frequency comes from the converter. Display: Serial bus: E40 f (all) out of range - the measurement hybrid is probably damaged. Send the transmitter to Vaisala for repair. E41 f (T) out of range - the temperature measurement cannot be completed. Check the temperature sensor and its solderings.
HMP230 SERIES Appendix 5: Error messages M210225en-B E44 f (Rk2 ) out of range - the temperature measurement cannot be completed. Check the temperature sensor and its solderings. Check the temperature measurement wires and their solderings on the component board (TP5,TP6,TP7 and TP8). If you cannot find any faults, send the transmitter to Vaisala for repair. E45 f (Ud1 ) out of range - the humidity measurement cannot be completed.
HMP230 SERIES Appendix 5: Error messages M210225en-B The second error type indicates erroneous y-values (used in internal calculations): Display: Serial bus: E51 T y-value out of range - the temperature measurement cannot be completed. Check the temperature sensor and its solderings. Check the temperature measurement wires and their solderings on the component board (TP5,TP6,TP7 and TP8). If you cannot find any faults, send the transmitter to Vaisala for repair.
HMP230 SERIES Appendix 6: Calculation formulas M210225en-B CALCULATION FORMULAS The HMP230 series transmitters measure relative humidity and temperature. From these values dewpoint, mixing ratio, absolute humidity and enthalpy in normal pressure are calculated using the following equations Tn m −1 RH ö logæç Pws ⋅ ÷ è 100 ⋅ A ø dewpoint: Td = mixing ratio: x = 621.98 ⋅ RH ⋅ absolute humidity: a = 216.68 ⋅ RH ⋅ enthalpy: h = T ⋅ (1.01 + 0.00189 ⋅ x) + 2.
HMP230 SERIES Appendix 6: Calculation formulas M210225en-B The vapour pressure (in Pascals) is calculated using equation: 3 ln Pws = å bi Θ i + b4 ln Θ (6) i = −1 where: bi = coefficients b-1 = -0.58002206 * 104 b0 = 0.13914993 * 101 b1 = -0.48640239 * 10-1 b2 = 0.41764768 * 10-4 b3 = -0.14452093 * 10-7 b4 = 6.5459673 The parameters A, m, and Tn depend on temperature according to the following table: t 0 ... 50 °C 50 ... 100 °C 100 ... 150 °C 150 ... 180 °C A 6.1078 5.9987 5.8493 6.
HMP230 SERIES Appendix 7: Alarm output unit M210225en-B ALARM OUTPUT UNIT The alarm output unit consists of two alarm relays and two opto-isolated outputs (see Figure 1). The relay output 1 is available at screw terminal X1 and the relay output 2 at screw terminal X2. The opto-outputs are activated simultaneously with the corresponding relays and available at screw terminal X5. Figure 1 Relay and opto-outputs When the relay is not activated, the C and NC outputs of the screw terminal are closed.
HMP230 SERIES Appendix 7: Alarm output unit M210225en-B ribbon cable X16 M3 screws (4 pcs) for mounting (prefix with fibre washers) X3 M4 screw and washer for protective ground terminal +- ++- replace the plastic plug with cable gland for ¢7...
HMP230 SERIES Appendix 7: Alarm output unit M210225en-B Setting and activating the outputs with menu commands • Select MORE in the main menu and then ALARM; the following is displayed: • If the settings need to be changed, press CL: - the quantity starts blinking; it can be changed with arrow switches, and acknowledged with ENT. - the third parameter (in this example HI ON) starts blinking. This parameter determines whether the alarm output is in use or not, and when it is activated.
HMP230 SERIES Appendix 7: Alarm output unit M210225en-B The currently valid settings of the alarm output unit can be checked with command ALARM: >alarm Ch1 RH LO Ch2 RH HI > OFF OFF 0.00 100.00 0.00 %RH 0.00 %RH This is an example of the factory setting (both alarm outputs are in OFF mode, i.e. not in use). The settings can be changed with command ALARM: >alarm Ch1 Td Ch2 RH > 1 HI HI Td OFF OFF HI -20 5 -20.00 5.00 'C 100.00 0.00 %RH When giving this command, first enter the channel number i.
HMP230 SERIES Appendix 7: Alarm output unit M210225en-B with commands ALARM 1 ON and ALARM 2 ON: >alarm Ch1 Td Ch2 T >alarm Ch1 Td Ch2 T > 1 HI HI 2 HI HI ON ON OFF ON ON ON -20.00 30.00 5.00 'C 5.00 'C -20.00 30.00 5.00 'C 5.
HMP230 SERIES Appendix 8: Connectors M210225en-B CONNECTORS 140 1.1 Connector options ...............................................................................................141 1.2 Analogue outputs.................................................................................................141 1.3 Serial connections ...............................................................................................142 1.4 Instructions for connecting and mounting the counter pieces .........
HMP230 SERIES Appendix 8: Connectors M210225en-B 1.1 Connector options The HMP230 series transmitters can be ordered with various connector configurations meaning that the sleeve or plug of the standard transmitter has been replaced with a connector. In the following, various options and signals. FEMALE Figure 1 1.2 MALE Connector location Analogue outputs Analogue outputs are selected when ordering the transmitter (order form has options for 0... 20 mA, 4... 20 mA, 0... 1V, 0.... 5V and 0... 10V).
HMP230 SERIES Appendix 8: Connectors 1.3 M210225en-B Serial connections Also an RS232C serial bus can be connected to the connector; in this case, the connector is used mainly for maintenance and calibration purposes. Alternatively, a two wire RS 485 net can be built through the connector; in this case, also the power supply (24 VDC) is chained through transmitters. RS232C connection Part # 19371 1 2 3 4 5 Connection X6/Rx X6/Tx X6/GNDX1/NC X1/NC The male connector (part n.
HMP230 SERIES Appendix 8: Connectors M210225en-B 1.4 Instructions for connecting and mounting the counter pieces The counter piece has to be grounded as shown in Figure 1.4 in order to maintain a complete EMC protection. The recommended cable is a shielded cable with an outer diameter of 4 - 6 mm, e.g. PFSK 6 x 0.22 mm. bend the sheath over the pole piece no strands on the O-ring O-ring first tightening Figure 1.4 Figure 1.
HMP230 SERIES Appendix 9: Re-gaining M210225en-B RE-GAINING 1. GENERAL............................................................................................................... 145 2. TO BE NOTED IN RE-GAINING.............................................................................. 146 3. LED COMMANDS ................................................................................................... 147 4. DISPLAY/KEYPAD COMMANDS............................................................
HMP230 SERIES Appendix 9: Re-gaining M210225en-B GENERAL In some applications the sensor gain may decrease gradually due to an interference caused by some chemical present in the ambient (see Figure 1). The sensor polymer absorbs the interfering chemical; this reduces the polymer's ability to absorb water molecules and so decreases the sensor gain. In re-gaining the interfering chemical is evaporated by heating the humidity sensor to a temperature level of approximately +160 °C.
HMP230 SERIES Appendix 9: Re-gaining 2. M210225en-B TO BE NOTED IN RE-GAINING Re-gaining cannot be started automatically or manually unless the security lock jumper is on. This is to prevent automatic re-gaining from starting during a sensor calibration (when the security lock jumper must be removed). Furthermore, re-gaining can be started only if the sensor temperature is below 100 °C. At higher temperatures the chemicals are evaporated from the sensor spontaneously, and the re-gaining is not needed.
HMP230 SERIES Appendix 9: Re-gaining M210225en-B suitable in an ambient with a gas flow rate of 2 m/s or more around the sensor head. Furthermore, if the settling time is very long and the temperature difference small (close to zero) and the ambient temperature changes during re-gaining, the sensor may not reach the temperature difference within the settling time and the transmitter will remain inactive for a long period of time. 3.
HMP230 SERIES Appendix 9: Re-gaining 4. M210225en-B DISPLAY/KEYPAD COMMANDS Press the CL key to enter the command mode. Select More from the first menu using the arrow keys and press ENT key. Select again More from the second menu and press ENT. The following menu is displayed: Select Regen and press ENT. To change or inspect the re-gaining parameter settings select Regen. settings and press ENT. To start re-gaining manually select Regeneration and press ENT. 4.1.
M210225en-B HMP230 SERIES Appendix 9: Re-gaining Use arrow keys to change the status of the automatic re-gaining and press ENT. Acknowledge the current setting by pressing ENT. To change the interval press CL. Using arrow keys select the new time interval digit by digit and acknowledge each digit using ENT key. Using CL key you can correct the entry by deleting the digits one by one. When you have entered the whole time interval, press ENT for the second time.
HMP230 SERIES Appendix 9: Re-gaining 5. M210225en-B SERIAL COMMANDS REG Re-gaining settings REG REG nnn nnn = ON or OFF Command REG is used to check the re-gaining parameter settings and to activate or inactivate the automatic re-gaining. Examples: checking the current settings >reg REG OFF Interval min Duration s Temp diff Settl time s k % > automatic re-gaining is inactive : : : : : 720 120 0.50 240 95.
HMP230 SERIES Appendix 9: Re-gaining M210225en-B CRI Changing re-gaining parameters Disconnect the security lock jumper! CRI With command CRI the values of the re-gaining parameters can be changed. Example: changing the re-gaining interval to 480 min and the settling time after sensor heating to 360 s >cri Interval min Duration s Temp diff Settl time s k % > : : : : : 720 120 0.50 240 95.00 ? 480 ? ? ? 360 ? NOTE To activate new parameter settings immediately, command RESET must be given.
HMP230 SERIES Appendix 9: Re-gaining M210225en-B Example: activating status display >fst on Form. status : >r N 0 RH= 20.8 N 0 RH= 20.7 N 0 RH= 20.7 N 0 RH= 20.8 H 163 RH= 20.8 H 163 RH= 20.8 H 163 RH= 20.8 H 163 RH= 20.8 S 163 RH= 20.8 S 163 RH= 20.8 S 163 RH= 20.8 S 163 RH= 20.8 N 163 RH= 20.8 N 163 RH= 15.0 N 163 RH= 16.7 N 163 RH= 17.4 H 160 RH= 17.7 H 160 RH= 17.7 ON %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH %RH T= T= T= T= T= T= T= T= T= T= T= T= T= T= T= T= T= T= 25.
HMP230 SERIES Appendix 9: Re-gaining M210225en-B Example: >regen Regeneration started, press >r S 162 RH= 20.0 %RH T= 26.5 S 162 RH= 20.0 %RH T= 26.5 S 162 RH= 20.0 %RH T= 26.5 ... N 162 RH= 18.4 %RH T= 27.7 N 162 RH= 18.5 %RH T= 27.6 N 162 RH= 18.8 %RH T= 27.
HMP230 SERIES Appendix 9: Re-gaining 6. M210225en-B TECHNICAL DATA Power consumption during re-gaining (without alarm output unit) 170 mA maximum (24 VDC) NOTE The optional power supply module cannot be used in a a transmitter which includes the re-gaining option. Sensor RH & T composite sensor (part no. 17550HM) Sensor protection PPS grid with stainless steel netting (part no. 16720HM) stainless steel sintered filter (part no. 16452) For other properties of the sensor heads see Chapter 8.
HMP230 Transmitter Appendix 10 PRESSURE UNIT CONVERSION CHART Multiplication factors NOTE: conversions from mmHg and inHg are defined at 0°C and for mmH2O and inH2O at 4°C. FROM: TO: hPa/mbar 0.01 PaN/m2 mmHg torr 1.333224 33.86388 inHg 0.09806650 mmH2O 2.490889 inH2O 1013.25 atm 980.665 at 1000 bar 68.94757 psi psia = psi absolute Example: 29.9213 inHg = 29.9213 x 33.86388 = 1013.
APPENDIX 11 WIRING DIAGRAM Note ! The cable shield has to be connected to the cable bushing for full EMC protection. Main board HMP230 and HMP260 In automation system the galvanically isolated inputs are recommended for current signals X2 To control system RS 232C (To control system) 1 Channel1+ 2 Channel1- 3 Channel2+ 4 Channel2- D igital c urrent loo p RS 485/422 RX GND +RX -RX HI TX LO TX NC +TX -TX HI RX LO X1 1 Supply voltage 24 VDC max.
Warranty Vaisala hereby represents and warrants all Products manufactured by Vaisala and sold hereunder to be free from defects in workmanship or material during a period of twelve (12) months from the date of delivery save for products for which a special warranty is given.
