USER'S GUIDE ® Vaisala HUMICAP Humidity and Temperature Transmitter Series HMT130 M211280EN-A
PUBLISHED BY Vaisala Oyj P.O. Box 26 FI-00421 Helsinki Finland Phone (int.): +358 9 8949 1 Fax: +358 9 8949 2227 Visit our Internet pages at http://www.vaisala.com/ © Vaisala 2010 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.
________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION............................................................................ 7 About This Manual ................................................................... 7 Contents of This Manual ....................................................... 7 Version Information ............................................................... 8 Related Manuals ...............................
User's Guide ______________________________________________________________________ CHAPTER 4 OPERATION.................................................................................................27 Using the Service Port ...........................................................27 Installing the Driver for the USB Cable................................27 Terminal Application Settings..............................................28 List of Serial Commands ...............................................
________________________________________________________________________________ Operating the User Port (RS-485) ......................................... 50 Networking Commands....................................................... 50 SERI............................................................................... 50 SERI2............................................................................. 50 ECHO............................................................................. 51 SMODE ...........
User's Guide ______________________________________________________________________ APPENDIX A CALCULATION FORMULAS.......................................................................85 Dewpoint Temperature...........................................................85 Dew/frostpoint Temperature..................................................86 Mixing Ratio ............................................................................87 Absolute Humidity....................................................
________________________________________________________________________________ List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 HMT130 Components .............................................................. 16 HMT130 Wall Mounting............................................................
User's Guide ______________________________________________________________________ List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Manual Revisions .......................................................................8 Related Manuals.........................................................................8 Wiring Table..............................................................................
Chapter 1 ________________________________________________________ General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the manual and HMT130. About This Manual This manual provides information for installing, operating, and maintaining the Humidity and Temperature Transmitter HMT130. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the manual and HMT130.
User's Guide ______________________________________________________________________ Version Information Table 1 Manual Code M211280EN-A Manual Revisions Description November 2010. First version.
Chapter 1 ________________________________________________________ General Information Safety The Humidity and Temperature Transmitter HMT130 delivered to you has been tested for safety and approved as shipped from the factory. Note the following precautions: CAUTION Do not modify the unit. Improper modification can damage the product or lead to malfunction. ESD Protection Electrostatic Discharge (ESD) can cause immediate or latent damage to electronic circuits.
User's Guide ______________________________________________________________________ Regulatory Compliances Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT130 is in conformity with the provisions of the following EU directives: - EMC-Directive (2004/108/EC) Conformity is shown by compliance with the following standards: - EN 61326-1: Electrical equipment for measurement, control and laboratory use – EMC requirements – for use in industrial locations.
Chapter 1 ________________________________________________________ General Information Warranty For certain products Vaisala normally gives a limited one-year warranty. Visit our Internet pages for more information and our standard warranty terms and conditions: www.vaisala.com/services/warranty.html. For certain products Vaisala normally gives a limited one-year warranty.
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Chapter 2 __________________________________________________________ Product Overview CHAPTER 2 PRODUCT OVERVIEW Thank you for choosing the Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT130. This chapter introduces you to its features. The Vaisala range of relative humidity measurement instruments covers all the applications from ventilation to process control in demanding conditions.
User's Guide ______________________________________________________________________ Accessories The following accessories are optionally available: - Duct installation kit Rain shield with installation kit Rain/solar radiation shield installation kit (for pole installation) Probe mounting flange Probe mounting clamp Constant output probe (HMP110REF, gives constant RH and T values) Fixed and Remote Probe Models The HMT130 is available either with a fixed probe directly attached to the transmitter housing
Chapter 2 __________________________________________________________ Product Overview Constant Output Probe The constant output probe is a testing accessory that can be used to check transmitter's functions and measurement signal transfer chain all the way to the control system. The constant output probe does not measure humidity and temperature; instead, it outputs constant humidity and temperature readings. The values output by the constant output probe are specified when ordering.
User's Guide ______________________________________________________________________ Transmitter Components Figure 1 below illustrates the main features of HMT130. On the left is a remote probe model without display, and on the right is a fixed probe model with the optional display. The numbers and arrows indicate the main components of the transmitters.
Chapter 3 _______________________________________________________________ Installation CHAPTER 3 INSTALLATION Mounting Wall Mounting 1. 2. Open the HMT130 cover by pushing the releasing button at the bottom of the transmitter housing and gently pulling the bottom part of the cover towards yourself. Make sure that the HMT130 Humidity and Temperature Transmitter is correctly aligned and attach it directly to the wall with up to four screws (not included in the package).
User's Guide ______________________________________________________________________ NOTE Select the size and type of the fastening screws according to the wall material (wood, stone, etc.). Even though using all four screws is strongly recommended, the HMT130 enclosure fastening holes are initially covered with a thin plastic membrane, so less than four screws could be also be used without sacrificing the ingress protection (IP) class of the enclosure.
Chapter 3 _______________________________________________________________ Installation Installation with Radiation Shield DTR502 with probe installation kit includes a rain/solar radiation shield DTR502 and a plastic installation support for the humidity probe. Vaisala order code: DTR502B. If you already have the DTR502 shield and need only the installation support for the probe, it is available with Vaisala order code 210623. 1. 2. 3.
User's Guide ______________________________________________________________________ Duct Installation Kit The duct installation kit includes a plastic pipe with a flange (Vaisala order code: 215619). To install the HMP110 probe with the duct installation kit, drill a hole to the duct wall, assemble the probe to the duct installation kit, slide the probe head through the hole, and attach the flange to the duct wall with four screws.
Chapter 3 _______________________________________________________________ Installation Probe Assembly with Duct Installation Kit 1 2 3 0505-177 Figure 6 Assembly of the Probe with Duct Installation Kit The following numbers refer to Figure 6 above: 1 2 3 1. 2. 3. = = = HMP110 Duct installation kit Probe cable Slide the probe cable through the duct installation kit plastic pipe. Attach the probe cable to the HMP110 Humidity Probe. Attach probe assembly to the duct.
User's Guide ______________________________________________________________________ Drill the holes for the duct installation kit as follows: 1. 2. Use a 24-mm drill bit to drill a hole to the duct wall for the humidity probe. Drill holes for the duct installation kit mounting screws around the hole in a square arrangement, 42 mm apart from each other. Use a 3.2-mm drill bit to drill the holes for the mounting screws (four ST4.2×16-C-Z DIN 7981 screws).
Chapter 3 _______________________________________________________________ Installation Probe Mounting Clamp The optional mounting clamp (Vaisala order code: 226067) makes it easy to install the probe on the wall of the measurement environment. The probe can be detached for calibration simply by loosening the lower screw. Installing the entire probe in the measurement environment prevents heat conduction to the sensor, and is the recommended installation method.
User's Guide ______________________________________________________________________ Connections 1 C A L 2 RH T ADJ 3 + CH1 SGND 4 CH2 - 485 TERM 485+ VIN + 485- VIN – SERVICE PORT SHIELD 5 GND REL 6 7 8 9 1011-162 Figure 10 HMT130 Component Board The following numbers refer to Figure 10 above: 1 2 3 4 5 6 7 8 9 = = = = = = = = = Optional LCD display Indicator LEDs Adjustment buttons RS-485 bus termination switch Service port Relay terminals RS-485 bus Analog outputs Power suppl
Chapter 3 _______________________________________________________________ Installation - V VIN+ Close the cover by keeping it slightly tilted and first attaching it to the fixing snaps at the top of the enclosure base and then pushing the lower part of the cover firmly forward until it locks. The transmitter is ready for use. SGND 5. VIN- 4. SHIELD 3. CH2 2. Open the transmitter cover by pressing the releasing button at the bottom side of the transmitter.
User's Guide ______________________________________________________________________ 7 485- 8 485+ 9 GND 10 REL 11 1011-164 Figure 12 Serial Communication and Relay Table 3 Wiring Table Terminal 1 2 3 4 5 6 7 8 9 10 11 Description SGND (signal ground) CH1+ (signal +) CH2+ (signal +) Cable shield (optional) Vin- (power supply - or VAC) Vin+ (power supply + or VAC) 485485+ GND (ground) Relay Relay Numbers 1 ...
Chapter 4 ________________________________________________________________ Operation CHAPTER 4 OPERATION This chapter contains information that is needed to operate the HMT130. Using the Service Port HMT130 motherboard has an 8-pin RJ-45 connector for service use. Service port uses RS-232 signaling levels. Vaisala offers an optional USB cable (Vaisala order code 219685) for connecting the transmitter to your PC. NOTE The service port is intended for short-term use such as calibration.
User's Guide ______________________________________________________________________ 2. Insert the media that came with the cable, or download the driver from www.vaisala.com. 3. Execute the USB driver installation program (setup.exe), and accept the installation defaults. The installation of the driver may take several minutes. 4. After the driver has been installed, connect the USB cable to a USB port on your PC. Windows will detect the new device, and use the driver automatically. 5.
Chapter 4 ________________________________________________________________ Operation 3. 4. 5. 6. Select the Serial settings category, and check that the correct COM port is selected in the Serial line to connect to field. Note: You can check which port the USB cable is using with the Vaisala USB Instrument Finder program that has been installed in the Windows Start menu. Check that the other serial settings are correct for your connection, and change if necessary.
User's Guide ______________________________________________________________________ List of Serial Commands All commands can be issued either in uppercase or lowercase. The notation refers to pressing the carriage return (ENTER) key on your computer keyboard. Enter a to clear the command buffer before starting to enter commands. Whenever you change any of the parameters and want to store the changes permanently, use the SAVE command.
Chapter 4 ________________________________________________________________ Operation Device Information and Status Show Device Information The ? command outputs a listing of device information. ? Example: >? Device Name SW Name SW model SW version Serial number Address Unit Ch1 Status Ch2 Status Probe name Probe SW Probe SW date Probe SN > : : : : : : : : : : : : : HMT130 HMT120/130 HMT130 0.9.3.389 "F2220101" 0 METRIC ON ON "HMP110" "1.01.
User's Guide ______________________________________________________________________ NOTE Single-parameter transmitters HMT130H and HMT130T have only one quantity (T for HMT130T, and RH, TD, TDF, A, X, H, TW, PWS, PW for HMT130H.) Set/Show Calibration Date Use the CDATE command to show or set the calibration date field. (Calibration refers to the calibration of the HMT130's analog outputs.
Chapter 4 ________________________________________________________________ Operation Show Analog Output Status The AOUT command shows the following information: - - Analog out mode is the output mode for the channel, for example 0 ... 10 V. Error level is the level that the analog output is set to in case of transmitter error. Status indicates the current status of the channel. The statuses are ON: Normal measurement operation. OFF: No quantity selected for the channel using the ASEL command.
User's Guide ______________________________________________________________________ Show System Information SYSTEM Example: >system Device Name SW Name SW model SW version Serial number > : : : : : HMT130 HMT120/130 HMT130 1.0.0.500 A1234567 Show Firmware Version VERS Example: >vers HMT130 / 0.1.0.103 > Serial Line Output Commands Start Continuous Outputting Use the R command to start the continuous outputting of measurement values as an ASCII text string to the serial line.
Chapter 4 ________________________________________________________________ Operation Stop Continuous Outputting Use the S command to stop the continuous measurement output: S Set/Show Output Interval Use the INTV command to show or set the output interval of the serial line measurement messages (applies when R command or RUN mode is used). The shortest output interval is one second. This command has no effect on the operation of the analog outputs.
User's Guide ______________________________________________________________________ Calibration Commands Serial commands that are related to calibration are described below. For the actual calibration procedures, see section Calibration and Adjustment on page 58. Calibrate Humidity Measurement Use the CRH command to perform a one-point or two-point humidity (RH) calibration. CRH When performing a one-point calibration, you need to place the probe in a single humidity reference with RH < 50%.
Chapter 4 ________________________________________________________________ Operation Restore Probe RH Factory Calibration Use the CRHCLR to restore the probe RH factory calibration. CRHCLR Example: >crhclr OK > Calibrate Temperature Measurement Use the CT command to perform a one-point or two-point temperature (T) calibration. CT When performing a one-point calibration, you need to place the probe in a single temperature reference.
User's Guide ______________________________________________________________________ Restore Probe T Factory Calibration Use the CTCLR to restore the probe T factory calibration. CTCLR Example: >ctclr OK > Calibrate Analog Output Use the ACAL command to calibrate the analog voltage outputs. ACAL After you give this command, the CH1 analog output of the transmitter is set to the low limit (0V). Measure the output and enter the measured value.
Chapter 4 ________________________________________________________________ Operation Configuring Serial Line Operation Set/Show Serial Line Settings Use the SERI command to show or set the serial line settings for the serial port that you are currently using (service port or user port). Use the SAVE command after changing the settings to store them. The new settings will be taken into use when the transmitter is reset or powered up.
User's Guide ______________________________________________________________________ Set/Show Serial Interface Mode Use the SMODE command to show or set the serial interface mode. Note that a separate SAVE command is not needed to store the new serial interface mode setting. SMODE [STOP/RUN] In STOP mode: outputting only when command is issued, any command can be used. In RUN mode: outputting automatically, only command S can be used.
Chapter 4 ________________________________________________________________ Operation Configuring Analog Output Set/Show Analog Output Mode Use the AMODE command to show or set the analog output mode.
User's Guide ______________________________________________________________________ Set/Show Analog Output Error Levels Use the AERR command to show or set the analog output error levels. AERR [level1 level2] where level1 level2 = Error levels for analog output channel Examples: >aerr Ch1 Error level Ch2 Error level > : 0.0 : 0.0 >aerr 10.8 10.8 Ch1 Error level Ch2 Error level > : 10.8 : 10.
Chapter 4 ________________________________________________________________ Operation Examples: >asel Ch1 Quantity RH lo RH hi Ch2 Quantity T lo T hi > : : : : : : RH 0 100 T -60 100 >asel rh td Ch1 Quantity RH lo RH hi Ch2 Quantity Td lo Td hi > : : : : : : RH 0 100 TD -40 60 >asel t td 0 60 -20 60 Ch1 Quantity : T T lo : 0 T hi : 60 Ch2 Quantity : TD Td lo : -20 Td hi : 60 > >asel rh none Ch1 Quantity RH lo RH hi Ch2 Quantity > : : : : >asel none none Ch1 Quantity Ch2 Quantity > : NONE : NONE RH
User's Guide ______________________________________________________________________ Test Analog Outputs Use the ATEST command to test the analog outputs. The ATEST command will force the output to the given value, which can then be measured with a calibrated multimeter. ATEST command affects only the analog outputs and hence it does not disable measurement functions. ATEST without parameters will exit the test mode and let the measurement continue.
Chapter 4 ________________________________________________________________ Operation Set/Show Relay Operating Mode Use the RMODE command to set/show relay mode, low and high limits. Relay modes are OFF, LO_OPEN and HI_OPEN. Low and high values specify relay operation limits for the selected quantity.
User's Guide ______________________________________________________________________ Other Commands Set/Show Displayed Quantities After you have defined the quantities with the CALCS command, use the DSEL command to show or set the displayed quantities. Number of parameters determine the display mode (ie. one or two rows). If one quantity is given, display will switch to one row mode. If two quantities are given, two row mode is used. Valid quantities are: RH, T, TD, TDF, A, X, H, TW, PWS and PW.
Chapter 4 ________________________________________________________________ Operation Set/Show Output Formatting After you have defined the quantities with the CALCS command, use the FORM command to set the output format for SEND and R commands. FORM [format] where format = A formatting string, which can consist of following fields: “” String constant x.y Value length modifier. x is numbers before dot and y is numbers after dot. Ux Unit field length. U…U format is also supported. Q Quantity name (e.g.
User's Guide ______________________________________________________________________ Display Command List Use the HELP command to display a list of available commands. HELP Display Active Errors Use the ERRS command to display the currently active error codes. For troubleshooting active errors, see Table 7 on page 75. ERRS Example (no active errors): >errs No errors. > Save Changed Settings Use the SAVE command to save changed settings to the transmitter FLASH memory.
Chapter 4 ________________________________________________________________ Operation Restore Saved Settings Use the RESTORE command to restore saved settings from transmitter FLASH memory to RAM. All unsaved changes will be lost. RESTORE Example: >restore Restoring default settings...done > Reset Transmitter Use the RESET command to reset the transmitter. Upon reset or powerup, the transmitter enters the serial mode that has been set with the SMODE command.
User's Guide ______________________________________________________________________ Set/Show Output Unit Use the UNIT command for output unit selection (metric or non-metric). UNIT [METRIC/NON_METRIC] Example: >unit Unit > : METRIC >unit non_metric Unit > : NON_METRIC Operating the User Port (RS-485) The RS-485 interface enables communication between RS-485 network and HMT130 transmitter. The RS-485 interface is not isolated.
Chapter 4 ________________________________________________________________ Operation ECHO Use the ECHO command to enable/disable echo of characters received over the serial line. ECHO [x] where x = ON/OFF (default = OFF) When using 2-wire connection, echo must be always disabled. SMODE Use the SMODE command to set the default serial interface mode.
User's Guide ______________________________________________________________________ INTV Use the INTV command to set the RUN mode output interval. INTV [n xxx] where n = xxx = 1 - 255 S, MIN or H This command sets the RUN mode output interval. The time interval is used only when the RUN mode is active. For example, the output interval is set to 10 minutes. >INTV 10 min Output intrv. > : 10 min Setting RUN output interval to zero enables the fastest possible output rate.
Chapter 4 ________________________________________________________________ Operation OPEN When all transmitters on the RS-485 bus are in POLL mode the OPEN command sets one transmitter temporarily to STOP mode so that other commands can be entered. OPEN [aa] where aa = address of the transmitter (0 ... 99) CLOSE The CLOSE command switches the transmitter back to the POLL mode. CLOSE Example: >OPEN 2 (opens the line to transmitter 2, other transmitters stay in POLL mode) >CRH ...
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Chapter 5 ______________________________________________________________ Maintenance CHAPTER 5 MAINTENANCE This chapter provides information that is needed in basic maintenance of the product. Replacing the HUMICAP® Sensor Fixed and Remote Probe Models 1. 2. 3. 4. Remove the filter (plastic grid or sintered stainless steel). Remove the damaged sensor and insert a new one. Recalibrate the probe. Replace a dirty filter to ensure a maximum lifetime and a fast response for the sensor.
User's Guide ______________________________________________________________________ Removing and Fastening the Probe Fixed Probe Model Remove and replace the probe as follows: 1. Loosen the metal locking bushing by carefully turning it counter clockwise. Remove the probe from the transmitter by pulling it gently downwards. Attach the new probe to the four pin M8 panel connector at the transmitter (only one position possible).
Chapter 5 ______________________________________________________________ Maintenance Remote Probe Model 1. 2. Unscrew the small sleeve that secures the probe in place at the end of the probe cable and pull out the probe. Replace the probe and screw the small sleeve back on, securing the probe tightly in place.
User's Guide ______________________________________________________________________ Calibration and Adjustment Calibrate and adjust the HMT130 using the push-buttons on the motherboard, serial line commands, or with portable humidity meters HM70 or HMI41. A calibrator kit is needed for calibration against saturated salt solutions. The HMK15 Humidity Calibrator and pre-measured certified salts are available from Vaisala. For further information, please contact your Vaisala representative.
Chapter 5 ______________________________________________________________ Maintenance difference between the two humidity reference points must be at least 30 %RH. The difference between the two temperature reference points must be at least 30 °C. NOTE In push-button calibration, the transmitter outputs are by default relative humidity in the range 0…100% RH in CH1 and temperature in the range -40…+60°C in CH2 regardless what the actual transmitter settings are.
User's Guide ______________________________________________________________________ NOTE If you do not wish to perform the two-point RH adjustment at this time, press the ADJ button one more time. The green indicator LED turns off and the red indicator LED begins to blink slowly (800ms cycle time) to indicate T calibration state. Now you can continue following the instructions from step 7 onwards.
Chapter 5 ______________________________________________________________ Maintenance NOTE Do not touch the adjustment buttons before the conditions have stabilized. 11. 12. Using the - and + buttons, make the temperature gain adjustment by making sure the Uout voltage is correct (you have to press either - or + at least once even if the value is correct). Press the ADJ button one more time. The red indicator LED turns off and the transmitter returns to normal mode.
User's Guide ______________________________________________________________________ Adjustment with HM70 You can check and adjust the HMT130 relative humidity measurement with the HM70 Hand-Held Humidity and Temperature meter. A HM70connection cable is needed. Vaisala order code: 211339. There are four types of adjustments available: field checking and adjustment using a calibrated reference probe, one-point adjustment using a calibrator, two-point adjustment using a calibrator, and LiClNaCl adjustment.
Chapter 5 ______________________________________________________________ Maintenance NOTE From this point onward, the local adjustment buttons at HMT130 are disabled and adjustment is carried out using the MI70 indicator. HMT130 display and analog outputs will always follow the actual measured RH/T value when in MI70 adjustment mode. When operating the MI70, do not press the buttons too quickly or the calibration may fail. Wait for one second between each press. 6. 7. Press OK to start adjustment.
User's Guide ______________________________________________________________________ 10. Choose 1-point adjustment from the MI70 adjustment menu and press SELECT. 0505-185 Figure 18 Example of the MI70 Adjustment Menu 11. Press READY when the reading has stabilized in the reference condition (may take 30 minutes or more). You can follow the stabilization from the GRAPH display. 0505-186 Figure 19 Example of the MI70 Adjustment Mode Graph Display 12.
Chapter 5 ______________________________________________________________ Maintenance Two-Point Adjustment Using a Calibrator Note that the difference between the two reference humidities must be at least 50 %. MI70 indicator is used now only as a terminal for visualizing and setting the transmitter's RH reading. Follow steps 1 to 7 on page 62 and continue as follows: 8. Remove the filter from the transmitter's probe and insert the probe head into the lower humidity reference condition. 9.
User's Guide ______________________________________________________________________ 10. Choose LiCl-NaCl autom. from the MI70 adjustment menu and press SELECT. Press OK to accept the note telling about references. 11. Press READY when the reading has stabilized in the LiCl salt chamber (may take 30 minutes or more). You can follow the stabilization from the GRAPH display. 12. Remove the probe from the LiCl salt chamber and insert the probe head into the NaCl salt chamber. 13.
Chapter 5 ______________________________________________________________ Maintenance Adjustment with HMI41 You can check and adjust the HMT130 relative humidity measurement with the HMI41 indicator and HMP41/45/46 probes. A HMI41connection cable is needed. Vaisala order code: 25917ZZ. There are three adjustment modes available: offset (dry point), gain (wet point), and two-point adjustment.
User's Guide ______________________________________________________________________ Connections and Selecting the Calibrator Function 1. To select the calibrator function from the HMI41, press the ON/OFF button until you can see some text on the display. Then release the ON/OFF button and within 1 ... 2 seconds, press both ENTER and MODE buttons until the following display appears: 2.
Chapter 5 ______________________________________________________________ Maintenance Offset and Gain Adjustments Offset and gain adjustments are performed in the same way (they differ only in internal calculations), so this section is valid for both methods. 4. 5. 6. Connect the 25917ZZ HMI41-connection cable to the SERVICE PORT connector on the HMT130 motherboard (see Figure 10 on page 24).
User's Guide ______________________________________________________________________ HMI41 as a Reference Meter The HMI41 humidity probe is used to show the correct humidity value (be sure that the reference probe has previously been adjusted). Connect the cable and select the appropriate adjustment method as previously explained, and continue according to the following instructions. 8.
Chapter 5 ______________________________________________________________ Maintenance HMI41 as a Terminal The HMI41 can also be used for visualizing and setting the transmitter's RH reading manually. 8. A display similar to the one below should be visible: RH % The numbers on the first line indicate the transmitter reading, and the numbers on the second line indicate the HMI41 probe reading. 9. Let the readings stabilize and press MODE.
User's Guide ______________________________________________________________________ Troubleshooting Table 6 presents a summary of the error messages that may appear during adjustment with the HMI41. Table 6 Common Problems During Adjustment and Their Remedies Error Message RH Probable Cause This message may appear, for example, if the difference between the reference humidities is too small (< 50 %RH). This message may appear during adjustment when the HMI41 is trying to contact the transmitter.
Chapter 5 ______________________________________________________________ Maintenance Analog Output Tests HMT130 has a built-in software function for testing the analog outputs. To test the outputs, do the following: - V VIN+ SGND VIN- Press the - adjustment button (see Figure 16 on page 58). This sets the output voltage level to the low point of the analog output range (for example 0 V). The output stays at this level for about 30 seconds after the - adjustment button has been pressed. SHIELD 3.
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Chapter 6 ___________________________________________________________ Troubleshooting CHAPTER 6 TROUBLESHOOTING This chapter describes error messages and analog output error behavior, introduces some common problems, their probable causes and remedies and provides contact information for Technical Support.
User's Guide ______________________________________________________________________ Solving Typical Problems You can check the error message via the serial interface by using the ERRS command; see section Error Codes on page 75. In case of constant error, please contact Vaisala technical support.
Chapter 6 ___________________________________________________________ Troubleshooting Analog Output Error Notification If the transmitter is unable to operate due to an error, the analog outputs will be set to an error level. Default output voltage in error state is 0 V. Error voltage value can be changed via the serial interface by using the AERR command; see section Set/Show Analog Output Error Levels on page 42.
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Chapter 7 ____________________________________________________________ Technical Data CHAPTER 7 TECHNICAL DATA This chapter provides the technical data of the product. Specifications Table 9 Relative Humidity Measurement Specifications Property Measurement range Accuracy (including non-linearity, hysteresis, and repeatability): at 0 ... +40 °C (+32 ... +104 °F) Description/Value 0 ... 100 % RH ±1.7 %RH (0 ... 90 % RH) ±2.5 %RH (90 ... 100 % RH) at -40 ... 0 °C and +40 ... +80 °C (-40 ...
User's Guide ______________________________________________________________________ Table 11 Operating Environment Specifications Property Operating temperature range Transmitter body, no display Transmitter body, with display HMP110 probe Storage temperature range Electromagnetic compatibility Description/Value -40 ... +60 °C (-40 ... +140 °F) -20 ... +60 °C (-4 ... +140 °F) -40 ... +80 °C (-40 ... +176 °F) -50 ... +70 °C (-58 ...
Chapter 7 ____________________________________________________________ Technical Data Table 13 Mechanical Specifications Property Material Transmitter housing Display window Probe body Probe grid filter Housing classification Connections Voltage outputs and RS-485 Probe interface Probe cable lengths Display (optional) Weight (Wall model, including probe) Weight (10m cable model) Description / Value PBT plastic PC plastic Chrome coated aluminum Chrome coated ABS plastic IP65 (NEMA 4) Screw terminals 0.
User's Guide ______________________________________________________________________ Transmitter Dimensions 1011-158 Figure 22 Dimensions of the Fixed Probe Model in mm (inches) 82 __________________________________________________________________ M211280EN-A
Chapter 7 ____________________________________________________________ Technical Data 1011-159 Figure 23 Dimensions of the Remote Probe Model in mm (inches) VAISALA _______________________________________________________________________ 83
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Appendix A ______________________________________________________ Calculation Formulas APPENDIX A CALCULATION FORMULAS This appendix contains the formulas used for the calculated output quantities. HMT130 transmitter receives relative humidity and temperature from the HMP110 probe. From these values dewpoint, frostpoint, absolute humidity, mixing ratio, enthalpy, wet bulb temperature, saturation vapor pressure and vapor pressure in normal pressure are calculated using the following equations.
User's Guide ______________________________________________________________________ Pw is the water vapor pressure (see the equation below). The parameters A, m, and Tn depend on temperature according to the following table: T A 6.119866 6.1078 5.9987 5.8493 6.2301 … 0 °C 0 ... 50 °C 50 ... 100 °C 100 ... 150 °C 150 ... °C m 7.926104 7.5000 7.3313 7.2756 7.3033 Tn 250.4138 237.30 229.10 225.00 230.
Appendix A ______________________________________________________ Calculation Formulas Mixing Ratio The mixing ratio (mass of water vapour/mass of dry gas) is calculated using: x B Pw p-Pw g / kg (3) where B = 621.9907 g/kg The value of B depends on the gas. 621.9907 g/kg is valid for air. Absolute Humidity Absoute humidity is defined as the mass of water vapour in a certain volume. If ideal gas behaviour is assumed the absolute humidity can be calculated using: a C Pw T 273.
User's Guide ______________________________________________________________________ Saturation Vapor Pressure The saturation vapor pressure (Pws) is the equilibrium water vapor pressure in a closed chamber containing liquid water. It is a function only of temperature, and it indicates the maximum amount of water that can exist in the vapor state.
Appendix A ______________________________________________________ Calculation Formulas Water Vapor Pressure Vapor pressure refers to the vapor pressure of water in air or other gas. Water vapor has a partial pressure Pw which is part of the total pressure of the gas.
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Appendix A __________________________________________________________________INDEX INDEX A Accessories Active Errors Display Analog Output Calibrate Configuration Analog Output Error Levels Set Show Analog Output Error Notification Analog Output Quantity and Scaling Set Show Analog Output Status Show Analog Outputs Test F 14, 81 48 73 38 41 42 42 77 42 42 33 44 C Calculation Formulas Calibration Commands Calibration Information Set Show Command List Display Commands Other Component Board Components C
User's Guide ______________________________________________________________________ Output Interval Set Show Output Quantities Output Unit Set Show S 35 35 13 50 50 P Probe Mounting Clamp Probe Mounting Flange Probe RH Restore Factory Calibration Probe T Restore Factory Calibration PuTTY 23 22 37 38 28 Q Quantity Set Show Available 30 40 40 39 34 39 39 27 49 48 34 T 31 31 R Radiation Shield Installation Rain Shield Installation Reading Output Once Recycling Relay Operating Mode Set Show Relay Se
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