USER'S GUIDE ® Vaisala DRYCAP Dewpoint Transmitters DMT345 and DMT346 M210762EN-D
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 2009 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.......................................................................... 13 About This Manual ................................................................. 13 Contents of This Manual ..................................................... 13 Version Information ............................................................. 14 Related Manuals ...................................
USER'S GUIDE____________________________________________________________________ Probe and Cooling Set Mounting with Process Shut Down ..............................................................................38 Probe and Cooling Set Mounting with Process Running38 Removing the Transmitter for Maintenance ...................38 Wiring.......................................................................................39 Cable Bushings ...................................................................
________________________________________________________________________________ Wireless LAN Configuration ................................................ 78 Using Display/Keypad.................................................... 79 Using Serial Line ............................................................ 80 Telnet Settings .................................................................... 81 Web Configuration for LAN and WLAN............................... 81 Terminal Program Settings ...........
USER'S GUIDE____________________________________________________________________ AMODE/ASEL ..............................................................109 Analog Output Tests..........................................................110 ITEST ...........................................................................110 Analog Output Fault Indication Setting..............................111 AERR............................................................................111 Operation of Relays.............
________________________________________________________________________________ Adjustment Information ..................................................... 132 CTEXT and CDATE ..................................................... 132 Two-Point Relative Humidity Adjustment.......................... 133 Using Display/Keypad ....................................................... 133 Using Serial Line ............................................................... 134 FCRH ...................................
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________________________________________________________________________________ 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 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Fig
USER'S GUIDE____________________________________________________________________ Figure 55 Figure 56 Figure 57 Figure 58 Figure 59 Figure 60 Figure 61 Figure 62 Figure 63 Figure 64 Figure 65 Figure 66 Figure 67 Figure 68 Figure 69 Figure 70 Figure 71 Figure 72 Figure 73 Figure 74 Figure 75 Figure 76 Figure 77 Opening a Serial Connection....................................................83 Opening a Telnet Connection...................................................84 Pressure Set Buttons on Motherboard .
________________________________________________________________________________ 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 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 Table 25 Table 26 Table 27 Table 28 Table 29 Table 30 Table 31 Table 32 Table 33 Table 34 Table 35 Table 36 Table 37 Table 38 Table 39 Table 40 Table 41 Manual Revisions .....................................
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Chapter 1 ________________________________________________________ General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the manual and the product. About This Manual This manual provides information for installing, operating, and maintaining Vaisala DRYCAP® Dewpoint Transmitters DMT345 and DMT346. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the manual and the product.
USER'S GUIDE____________________________________________________________________ - Appendix A, Example Installation of DMT346, illustrates an example installation of DMT346 transmitter into a process. - Appendix B, Calculation Formulas, contains the formulas used for the calculated output quantities.
Chapter 1 ________________________________________________________ General Information Safety General Safety Considerations Throughout the manual, important safety considerations are highlighted as follows: WARNING Warning alerts you to a serious hazard. If you do not read and follow instructions very carefully at this point, there is a risk of injury or even death. CAUTION Caution warns you of a potential hazard.
USER'S GUIDE____________________________________________________________________ ESD for their intended use. However, it is possible to damage the product by delivering electrostatic discharges when touching, removing, or inserting any objects inside the equipment housing. To make sure you are not delivering high static voltages yourself: - Handle ESD sensitive components on a properly grounded and protected ESD workbench.
Chapter 1 ________________________________________________________ General Information reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
USER'S GUIDE____________________________________________________________________ Trademarks DRYCAP® is a registered trademark of Vaisala Oyj. Windows® is a registered trademark of Microsoft Corporation in the United States and/or other countries. License Agreement All rights to any software are held by Vaisala or third parties. The customer is allowed to use the software only to the extent that is provided by the applicable supply contract or Software License Agreement.
Chapter 2 __________________________________________________________ Product Overview CHAPTER 2 PRODUCT OVERVIEW This chapter introduces the features and advantages of the Vaisala DRYCAP® Dewpoint Transmitters DMT345 and DMT346. Introduction to DMT345 and DMT346 The DMT345 and DMT346 transmitters incorporate the advanced Vaisala DRYCAP® technology, which enables reliable and accurate dewpoint measurement.
USER'S GUIDE____________________________________________________________________ Quantity Temperature T Abbreviation Metric Unit T ºC Table 4 Optional Output Quantities and Their Abbreviations for Vaisala DRYCAP® Dewpoint Transmitter DMT345 Quantity Parts per million Absolute humidity (a) Absolute humidity in standard pressure and temperature (NTP) Wet bulb temperature (Tw) Water vapor pressure (Pw ) Water vapor saturation pressure (Pws) Enthalpy (h) Difference of T and Td/f (∆T) Table 5 Quantity Dewpo
Chapter 2 __________________________________________________________ Product Overview - AC mains power supply RS-485 serial line LAN and WLAN interfaces data logger module with real time clock additional analog output module alarm relay module Operating Principle The DMT345/346 transmitter incorporates the Vaisala DRYCAP® sensor, which uses an operating principle based on changes in capacitance as its thin polymer film absorbs water molecules together with a combined temperature measurement with a PT100
USER'S GUIDE____________________________________________________________________ Structure of the Transmitter 0604-005 Figure 1 Transmitter Body The numbers refer to Figure 1 above: 1 2 3 4 5 6 = = = = = = Signal + powering cable gland Cable gland for optional module, or WLAN antenna connector Cable gland for optional module Cover screw (4 pcs) Display with keypad (optional) Cover LED 22 __________________________________________________________________ M210762EN-D
Chapter 2 __________________________________________________________ Product Overview 0604-006 Figure 2 Inside the Transmitter Numbers refer to Figure 2 above: 1 2 3 4 = = = = 5 6 7 8 9 10 = = = = = = Service port (RS-232) Dip switches for analog output settings Power supply and signal wiring screw terminals Relay, data logger, RS-422/485, LAN, or WLAN module (optional) Grounding connector Power supply module (optional) Relay, data logger, or analog output module (optional) Dewpoint probe Output iso
USER'S GUIDE____________________________________________________________________ Probes and Cooling Set 0604-007 Figure 3 Probes, Cooling Set Figure 3 above shows from left to right: DMT345 probe, DMT346 probe and the cooling set. The probes are available with the following cable lengths: 2 m, 5 m, and 10 m.
Chapter 3 _______________________________________________________________ Installation CHAPTER 3 INSTALLATION This chapter provides you with information that is intended to help you install this product. Selecting Location Finding a suitable site for the dewpoint measurement probe is important for getting representative process or environmental measurements. The location of the probe should provide a good representation of the area of interest. Also select a location that is as clean as possible.
USER'S GUIDE____________________________________________________________________ 0804-066 Figure 4 Standard Mounting Wall Mounting with Wall Mounting Kit When mounting with wall mounting kit the mounting plate (Vaisala order code: 214829) can be installed directly on wall or onto a standard wall box (also US junction box). When wiring through back wall, remove the plastic plug from the wiring hole in the transmitter before mounting.
Chapter 3 _______________________________________________________________ Installation 0804-065 Figure 6 Dimensions of the Plastic Mounting Plate (mm/inch) Metal mounting plate is included in rain shield with installation kit and installation kit for pole or pipeline.
USER'S GUIDE____________________________________________________________________ 0604-012 Figure 8 Dimensions of the Metal Mounting Plate (in mm) Mounting with DIN Rail Installation Kit DIN rail installation kit includes a wall mounting kit, 2 clip-fasteners and 2 screws M4 × 10 DIN 7985 (Vaisala order code: 215094). 1. 2. 3. Attach two spring holders to the plastic mounting plate by using the screws provided in the installation kit.
Chapter 3 _______________________________________________________________ Installation 0604-013 Figure 9 Mounting with DIN Rail Installation Kit Pole Installation with Installation Kit for Pole or Pipeline Installation kit for pole or pipeline (Vaisala order code: 215108) includes the metal mounting plate and 4 mounting nuts for pole mounting. When mounting, the arrow in the metal mounting plate must point upwards, see Figure 7 on page 27.
USER'S GUIDE____________________________________________________________________ 0604-015 Figure 11 Horizontal Pole Installation Number refers to Figure 11 above: 1 = Mounting nuts M8 (4 pcs) Mounting Rain Shield with Installation Kit Vaisala order code for the rain shield: 215109.
Chapter 3 _______________________________________________________________ Installation Panel Mounting Frame To enable a neat and dirt free embedded installation of the transmitter, a panel mounting frame is available as an option (Vaisala order code: 216038). The frame is a thin, flexible plastic frame for the transmitter, with adhesive tape on one side. The frame is used to hide any rough edges of the installation hole, and provide a more finished look.
USER'S GUIDE____________________________________________________________________ 0804-083 Figure 14 Panel Mounting Dimensions (mm/inch) DMT345 Probe Mounting 0604-018 Figure 15 DMT345 Probe Dimensions (mm/inch) Installation with Flange The DMT345 is a small size (d = 12 mm) general purpose probe suitable for installation through process or duct walls with the flange installation kit available from Vaisala.
Chapter 3 _______________________________________________________________ Installation 0604-019 Figure 16 Flange Installation Kit The following numbers refer to Figure 16 above: 1 2 3 4 NOTE = = = = Process or duct wall Flange Sealing ring Probe When the temperature difference between the process or duct and the surroundings is large, the probe must be installed as deep in the process or duct as possible. This prevents errors caused by heat conduction in the probe cable.
USER'S GUIDE____________________________________________________________________ Description of the Cooling Set 304 164 112.5 40.6 ø105 ø118 ø28 ø20 ø88.9 8 15 120 27.5 sintered filter (fixed on top of the cooling set) 125 cooling element Figure 18 mounting flange cooling fins Cooling Set Dimensions (in mm) The cooling set consists of a cooling element and removable cooling fins.
Chapter 3 _______________________________________________________________ Installation When measuring temperature dependent quantities make sure that the temperature at the measurement point is equal to that of the process, otherwise the moisture reading may be incorrect. NOTE 0604-022 Figure 19 Measurement Ranges With and Without the Cooling Fins Parts of the Cooling Set A 15° 22 flange 172 104.
USER'S GUIDE____________________________________________________________________ max. 50 125 8 welding ø105 ø118 ø88.9 ø84.9 2 lengthening piece (pipe) mounting pipe M6×16 DIN912 (AISI 316) 0605-023 Figure 21 Mounting Flange Dimensions (in mm) General Probe and Cooling Set Mounting Instructions Follow these general mounting instructions to make the installation.
Chapter 3 _______________________________________________________________ Installation 5. Lock the probe in place by tightening the locking screws on the bar. sealing material (for example, mineral wool) ® DRYCAP sensor cooling sleeve cooling locking screws fins of the probe M4×6 DIN 916 (AISI 316) to be welded ø89.5 + 0.5 PROCESS (t max = 350 °C) mounting flange PROBE 120 marking hole O-ring FPM 125 (max. 175 mm) protective tube channel with mineral wool 8 40.
USER'S GUIDE____________________________________________________________________ Probe and Cooling Set Mounting with Process Shut Down Complete the entire mounting process as instructed on page 36. Probe and Cooling Set Mounting with Process Running Follow this procedure to reduce the amount of condensation that builds up in the installation hole. 1. 2.
Chapter 3 _______________________________________________________________ Installation Wiring Cable Bushings A single electrical cable with a screen and three to ten wires is recommended for power and analog/serial connections. The cable diameter should be 8 ... 11 mm. The number of cable bushings depends on the transmitter options.
USER'S GUIDE____________________________________________________________________ Cable Grounding Ground the screen of the electrical cable properly to achieve the best possible EMC performance. 0605-027 Figure 25 1. 2. 3. 4. 5. Grounding the Screen of Electrical Cable Cut back outer sheath to desired length. Cut back screen braiding or screen foil to dimension X (see Figure 25 A above).
Chapter 3 _______________________________________________________________ Installation 6. 7. 8. Mount lower part (item 5) on the housing. Push the seal with the contact socket of the gland (item 2 & 3) and flush into the lower part (item 5). Install the domed cap nut (item 1) onto the lower part (item 5). Transmitter Housing Grounding In case you need to ground the transmitter housing, the grounding connector is found inside the housing (see Figure 1 on page 22).
USER'S GUIDE____________________________________________________________________ WARNING Make sure that you connect only de-energized wires. 1. 2. 3. 4. NOTE Open the transmitter cover by taking out the four cover screws. Insert the power supply wires and signal wires through the cable bushing in the bottom of the transmitter; see the grounding instructions in the previous sections. Connect the analog output cables to terminals: Ch1 +, Ch1-, Ch2+, Ch2-.
Chapter 3 _______________________________________________________________ Installation 5. 6. 7. Connect the power supply wires to the connectors: POWER 10 ... 35 V = 24 V (+) and (–) terminals. ( If using AC voltage, always connect phase (~) to power supply (+) and 0 to power supply (–) ). When wiring the power supply module, see section Power Supply Module on page 45. Turn on the power. The indicator led on the cover lit continuously during normal operation.
USER'S GUIDE____________________________________________________________________ 0703-041 Figure 27 Connections to 24 VAC Power Supply 44 __________________________________________________________________ M210762EN-D
Chapter 3 _______________________________________________________________ Installation Optional Modules 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.
USER'S GUIDE____________________________________________________________________ 3. 4. 5. 6. 7. To attach the module, open the transmitter cover and fasten the power module to the bottom of the housing with four screws. See the position from section Basic Features and Options on page 20. Connect the wires from the terminals of the power supply module marked with + and – to the terminals POWER 10 ... 35V = 24 V~ on the motherboard of the transmitter.
Chapter 3 _______________________________________________________________ Installation Tämä tuote on pienjännitedirektiivin (2006/95/EEC) mukainen. - Vaihtovirtaliitännän saa kytkeä tehonsyöttömoduuliin ainoastaan valtuutettu sähköasentaja - Älä irrota tehonsyöttömoduulia lähettimestä, kun virta on kytkettynä. - Älä kytke verkkovirtaa tehonsyöttömoduuliin, jos kyseistä moduulia ei ole asennettu DMT345/346 lähettimeen. - Kytke aina maadoitusliittimet.
USER'S GUIDE____________________________________________________________________ Este producto cumple con la directiva de bajo voltaje (2006/95/EEC). - La conexión de la alimentación principal al módulo de alimentación sólo puede realizarla un electricista autorizado. - No desenchufe el módulo de alimentación del transmisor cuando esté encendido. - No conecte la alimentación principal al módulo de alimentación cuando no esté instalado en el transmisor DMT345/346.
Chapter 3 _______________________________________________________________ Installation - Nie wolno podłączać napięcia zasilającego do modułu zasilacza, kiedy nie jest on zamontowany w nadajniku DMT345/346. - Zawsze należy podłączać zabezpieczający zacisk uziemiający! Tento výrobek vyhovuje Směrnici pro nízké napětí (2006/95/EEC). - Připojení síťového napájení k napájecímu modulu smí provádět pouze oprávněný elektrikář. - Neodpojujte napájecí modul od snímače při zapnutém napájení.
USER'S GUIDE____________________________________________________________________ Third Analog Output 0503-030 Figure 30 Third Analog Output The following numbers refer to Figure 30 above: 1 2 3 = = = Flat cable pins Screw terminals for signal line DIP switches to select the output mode and range Installation and Wiring 1. 2. 3. 4. 5. 6. 7. NOTE Disconnect the power. In case the analog output module is installed in the factory, continue with the step 4.
Chapter 3 _______________________________________________________________ Installation 0508-029 Figure 31 8. 9. Third analog output selection Connect the power. Select the quantity and scale the channel via the serial line or display/keypad, see section Analog Output Quantities on page 108. For testing the analog output, see Section Analog Output Tests on page 110. For fault indication setting, see section Analog Output Fault Indication Setting on page 111.
USER'S GUIDE____________________________________________________________________ Selecting Relay Activation State The middlemost C terminal and either one of the terminals NO/NC shall be connected. The polarity can be freely selected. Normally open Common relay Normally closed NO C NC Relay NOT activated: C and NC outputs are closed, NO is open Relay IS activated: C and NO outputs are closed, NC is open. Connect the power and close the cover.
Chapter 3 _______________________________________________________________ Installation RS-422/485 Interface 0605-033 Figure 33 RS-485 Module Numbers refer to Figure 33 above: 1 2 3 NOTE = = = Flat cable pins Selection switches Screw terminals for wiring The markings on the module and in this manual are according to the line driver manufacturers’ application notes, where A is posive against B when measured with a voltmeter.
USER'S GUIDE____________________________________________________________________ Table 6 Connecting Twisted Pair Wires to Screw Terminals Screw terminal 1 2 3 4 5 6. NOTE Data line (2-wire RS-485) (not connected) (not connected) Data pair shield B A Data line (4-wire RS-485/422) RxB RxA Data pair shield TxB TxA If you use RS-485 (or RS-422) to connect just one DMT346 to a master computer, enable the internal termination of DMT346 by switching switches 1 and 2 ON.
Chapter 3 _______________________________________________________________ Installation 0605-034 Figure 34 4-Wire RS-485 Bus Connections, Part A Table 7 4-Wire (Switch 3:On) RS-485 master TxA TxB RxA RxB Data → → ← ← DMT346 RxA RxB TxA TxB VAISALA _______________________________________________________________________ 55
USER'S GUIDE____________________________________________________________________ 0605-035 Figure 35 4-Wire RS-485 Bus Connections, Part B Table 8 2-Wire (Switch 3:Off) RS-485 master A B 8. 9. Data ↔ ↔ DMT346 A B When operating in communication mode RS-422, set both switches 3 and 4 to ON position (4-wire wiring is required for RS-422 mode). Connect the power and close the cover. LAN Interface The optional LAN interface enables an Ethernet connection to the transmitter.
Chapter 3 _______________________________________________________________ Installation (10/100Base-T). Transmitters with the optional LAN interface are delivered pre-installed with a suitable cable and cable gland. The LAN interface can use both static and dynamic network settings. If the interface is configured to use dynamic settings, the network where the LAN interface is connected must have a DHCP server that provides the settings.
USER'S GUIDE____________________________________________________________________ Similarly to the LAN Interface, the WLAN interface can use both static and dynamic network settings. If the interface is configured to use dynamic settings, the network where the WLAN interface is connected must have a DHCP server that provides the settings.
Chapter 3 _______________________________________________________________ Installation during the interval, as well a data trend value that is averaged from samples taken during the interval (see Table 9 on page 59).
USER'S GUIDE____________________________________________________________________ The following numbers refer to Figure 38 on page 59: 1 2 = = Flat cable pins Battery After a reset or a power up, it will usually take at least 10 seconds before the data logger module is initialized. The real time clock and the data logging and reading functions are not available before the initialization is complete. The indicator LED on the module will blink green during normal operation.
Chapter 3 _______________________________________________________________ Installation PIN/Terminal 6 7 8 Wire Pink Blue Shield/Red Serial Signal Supply + Data in RX Cable shield Supply + B Cable shield Analog Signal Supply + Cable shield VAISALA _______________________________________________________________________ 61
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Chapter 4 ________________________________________________________________ Operation CHAPTER 4 OPERATION This chapter contains information that is needed to operate this product. Getting Started Within a few seconds after power-up the led on the cover of the transmitter is lit continuously indicating normal operation. When the transmitter is turned on the first time, the language selection window opens: Select the language with ▲▼ arrow buttons and press the SELECT button (the left-hand button).
USER'S GUIDE____________________________________________________________________ 0605-036 Figure 40 Basic Display The numbers refer to Figure 40 above: 1 2 = = 3 = The INFO shortcut button The GRAPH shortcut button changes the display into a curve mode Selected quantities Press the INFO button (in the basic display) to see the device information views, see section Device Information on page 98.
Chapter 4 ________________________________________________________________ Operation below. The period for the trend and max/min calculations depends on the selected graph window as follows: Table 11 Periods for Trend and Max/Min Calculations Observation Period Period for Trend/Max/Min Calculations (Resolution) 3 hours 1.
USER'S GUIDE____________________________________________________________________ Table 12 Graph Information Messages Failure Message Power outage No data Device failure T meas. failure RH meas. failure Adj. mode active Autocal Interpretation Power failure (marked also with dashed vertical line) Quantity has not been selected for the display General device failure.
Chapter 4 ________________________________________________________________ Operation 0706-011 Figure 43 Main Views Some menu items, such as Relay outputs in the Interfaces menu, are only shown if supported by the transmitter and the installed options. Changing the Language 1. Go back to the basic display by keeping the right-hand pressed for four seconds. 2. 3. Open the MAIN MENU by pressing any of the ▼▲◄► buttons. Scroll to the System menu option, and press the ► button.
USER'S GUIDE____________________________________________________________________ 2. 3. 4. Select ►Display and confirm by pressing the ► arrow button. Select Rounding and press ON/OFF button. Press EXIT to return to the basic display. Display Backlight Setting As a default the display backlight is always on. In the automatic mode the backlight stays on for 30 seconds from the last press of the button. When pressing any button, the light turns on again. 1. 2. 3. 4. 5.
Chapter 4 ________________________________________________________________ Operation 2. 3. 4. 5. Select ►System, press the ►arrow button. Select Menu PIN, press the ON button. Enter a PIN code by using the ▲▼ arrow buttons. Press OK to confirm the setting. Now the PIN lock is on and a key symbol is shown in a display. Press EXIT to return to the basic display. Returning to the menu is possible only by entering the correct PIN code.
USER'S GUIDE____________________________________________________________________ The configuration of the Display Alarms can only be done using the display/keypad option. An alarm is activated when the selected quantity goes higher than the high limit, or lower than the low limit, much in the same way as the relays. When an alarm is activated, an alarm note is displayed on the display, and the lights of the display will blink.
Chapter 4 ________________________________________________________________ Operation NOTE Changes you do on the alarm editing page will take effect immediately, and may cause an alarm to appear on the screen. 4. 5. To select a quantity for the alarm, press the Change button and select the quantity from the list. To modify or remove the alarm limit values, move the selection over the Act. above or Act. below field and press the Set button. You will be prompted to Modify or Remove the value.
USER'S GUIDE____________________________________________________________________ 3. 4. Start the MI70 Link program. Start using the program. There is usually no need to select a COM port manually, the MI70 Link software can detect it automatically. The MI70 Link program, and the optional connection cables, are available from Vaisala. See list of accessories in section Options and Accessories on page 148.
Chapter 4 ________________________________________________________________ Operation Table 13 Default Serial Communication Settings for User Port ANALOG OUTPUTS USER PORT POWER RS-232 10…36 V= 24 V~ Parameter Bauds Parity Data bits Stop bits Flow control Value 4800 Even 7 1 None + – RxD GND TxD Ch1+ 1 2 3 4 5 6 7 8 9 Ch1– Ch2+ Ch2– IOIOI 0506-033 Figure 48 Connection Example Between PC Serial Port and User Port Connections to pins 4,6,7 and 8 are required only if your software requires hardware
USER'S GUIDE____________________________________________________________________ Installing the Driver for the USB Cable Before taking the USB cable into use, you must install the provided USB driver on your PC. When installing the driver, you must acknowledge any security prompts that may appear. The driver is compatible with Windows® 2000, Windows® XP, Windows Server® 2003, and Windows® Vista. 1. Check that the USB cable is not connected. Disconnect the cable if you have already connected it. 2.
Chapter 4 ________________________________________________________________ Operation 3. Open a terminal program and set the communication settings as follows: Table 14 Communication Settings for the Service Port Parameter Bauds Parity Data bits Stop bits Flow control Value 19200 None 8 1 None For a detailed explanation of using a terminal program, see section Terminal Program Settings on page 82. 4. Power-up the DMT346.
USER'S GUIDE____________________________________________________________________ Table 15 IP Settings for the LAN and WLAN Interfaces Parameter Automatic configuration (DHCP) Web configuration IP Address Netmask Gateway Description If enabled, the transmitter will retrieve its network settings (including the IP Address) from a server in the network. If disabled, static network settings are used instead. If enabled, the settings of the interface can be changed using a web browser.
Chapter 4 ________________________________________________________________ Operation 5. In the IP configuration menu, select Automatic configuration (DHCP), or enter the IP address, Netmask and Gateway manually. If automatic configuration is enabled, manual configuration cannot be done. 0709-004 Figure 50 6. IP Configuration Menu To enter a value manually, use the the ▲▼ arrow buttons to select the parameter to change, and press Change. A cursor will appear in the first digit.
USER'S GUIDE____________________________________________________________________ where GATEWAY = IP address of the server that enables the transmitter to access other networks. Must be set manually if automatic configuration is not used. Examples: >net refresh OK DHCP : IP address : Subnet mask : Default gateway: Web config. : MAC address : Telnet : > >net on off DHCP : IP address : Subnet mask : Default gateway: Web config. : MAC address : Telnet : OK > OFF 192.168.0.101 255.255.255.0 192.168.0.
Chapter 4 ________________________________________________________________ Operation Table 16 Wireless LAN Settings Parameter SSID Security type Description The service set identifier (i.e. network name) of the wireless network to connect to. 1 … 32 characters. The security type of the wireless network. The options are: OPEN OPEN/WEP WPA-PSK/TKIP WPA-PSK/CCMP Security key All other choices except OPEN require a security key; see below.
USER'S GUIDE____________________________________________________________________ 0802-110 Figure 52 6. Entering Network SSID To change the currently selected Network type, select the Type entry and press the Change button. Select the new type from the list and press the Select button. 0802-112 Figure 53 7. 8. Selecting the Wireless Network Type If you have selected an encrypted network type (WEP or WPA), you must enter the security key to be used.
Chapter 4 ________________________________________________________________ Operation WLAN [SSID TYPE] Where SSID TYPE = = The network name in 1 … 32 characters The security type of the wireless network. The options are: OPEN OPEN/WEP WPA-PSK/TKIP WPA-PSK/CCMP Examples: >wlan ? Network SSID Type > : WLAN-AP : OPEN >wlan accesspoint wpa-psk/tkip Network SSID : accesspoint Type : WPA-PSK/TKIP WPA-PSK phrase ? thequickbrownfox Warning: Active connection will be disconnected.
USER'S GUIDE____________________________________________________________________ When accessing the web configuration page, you must first log in. Username: user Password: vaisala The web configuration page provides similar network configuration options as the serial line and the display/keypad. It also has additional options for advanced users. For example, there are more options for securing the wireless network.
Chapter 4 ________________________________________________________________ Operation Opening a Serial/USB Connection 1. 2. 3. Power up the transmitter and start the PuTTY application. Select the Serial & USB settings category, and check that the correct COM port is selected in the Serial or USB line to connect to field. Change the port if necessary. If you are using a Vaisala USB cable, you can check the port that it uses by clicking the USB Finder... button.
USER'S GUIDE____________________________________________________________________ Opening a Telnet Session (LAN/WLAN) NOTE The instructions below assume that the LAN/WLAN interface on the transmitter is correctly configured and the network connection is already done. 1. 2. 3. Power up the instrument and start the PuTTY application. If your transmitter acquires a network address using DHCP, wait for a minute for this to complete, then verify the address from the transmitter.
Chapter 4 ________________________________________________________________ Operation List of Serial Commands The bold text in the brackets indicates the default setting. Issue commands by typing them on your computer and pressing the Enter key. Table 17 Measurement Commands Command R S INTV [0 ... 255 S/MIN/H] SEND [0 ... 99] SMODE [STOP/RUN/POLL/SEND] SERI [baud p d s] ADDR [0 ... 99] NET WLAN OPEN [0 ...
USER'S GUIDE____________________________________________________________________ Table 20 Command PUR PURGE Table 21 Command AUTO AUTOCAL Table 22 Command FCRH AØ1 CT ACAL Table 23 Command ASEL ITEST AMODE AERR ASCL Table 24 Command RSEL RTEST Table 25 Command ? ?? CDATE CODE CTEXT DATE DSEND ECHO ERRS FIND HELP LOCK MODS PRES Purge Commands Description Purge settings Start manual purge Autocalibration Commands Description AutoCal settings Start manual AutoCal Calibration and Adjustment Commands De
Chapter 4 ________________________________________________________________ Operation Command RESET TEST TIME UNIT VERS XPRES MOL/MOLI Description Reset the device Self-diagnostics information Set time. Display output units Display the software version information Set pressure (temporarily) View/set mole weight parameter Getting Measurement Message from Serial Line Starting Continuous Outputting R Enter the R command to start the continuous output of measurements. Example: >r Tdf=-20.6 'C H2O= >r Tdf=-20.
USER'S GUIDE____________________________________________________________________ See command SMODE to change the default (power-up) operation mode. Formatting Serial Line Message FTIME and FDATE FTIME and FDATE commands will enable/disable output of time and date to the serial line. To add time to R and SEND outputs issue command FTIME [x]. Syntax: FTIME Syntax: to add date to R and SEND outputs: FDATE [x] where x = ON or OFF Example: >send RH= 16.2 %RH T= 22.0 'C >ftime on Form.
Chapter 4 ________________________________________________________________ Operation Example: >fst on Form. status >send w 0 Tdf= 'C > N H S A w : ON 0.6 'C x= 4.0 g/kg ... xxx = Normal operation ... xxx = Purge ... xxx = Sensor cooling after purge ... xxx = AutoCal ... xxx = Sensor warming SSR= 22.5 % Ts= 23.
USER'S GUIDE____________________________________________________________________ To select display units: 1. 2. 3. 4. 5. NOTE Open the MAIN MENU by pressing any of the ▲▼◄► arrow buttons. Press the ► arrow button to select Display. Use the ▲▼arrow buttons to select Units. Confirm the selection by pressing the right-hand arrow button. Use the ▲▼ arrow buttons to select display units. Confirm the selection by pressing CHANGE. The unit changes from metric to non-metric or the other way round.
Chapter 4 ________________________________________________________________ Operation Modifier "" #xxx Description String constant Special character, code "xxx" (decimal), for example #027 for ESC Unit field and length Transmitter address with two characters [00...99] Error flags for P, T, Ta, RH [0000 ... 1111], 0 = no error Transmitter status in 7 character field, for example: N 0 no heating h 115 probe heating active, power 115/255 H 159.0 purge heating active, temperature 159 ºC S 115.
USER'S GUIDE____________________________________________________________________ NOTE This command changes both the serial output and display units to either metric or non-metric units. When you want to output both metric and non-metric units simultaneously on the display, select the display units by using the display/keypad. Pressure Compensation Setting The pressure has an effect on humidity calculations and accuracy.
Chapter 4 ________________________________________________________________ Operation Using Buttons on Motherboard Pressure set buttons (Pchk and Pset) can be used to set the process pressure. 0504-052 Figure 57 Pressure Set Buttons on Motherboard Numbers refer to Figure 57 above: 1 2 = = Pressure set button Pressure check button Press check button (Pchk) and a red led will flash the current pressure setting in bara. Press the set button (Pset) to set the pressure value.
USER'S GUIDE____________________________________________________________________ Example: >pres Pressure >pres 1010 Pressure > Table 27 : 1013.00 hPa ? : 1010.00 hPa Multiplication Factors From mbar PaN/m2 mmHg torr inHg mmH2O inH2O atm at bar psia 1) To: hPa 1 0.01 1.333224 33.86388 0.09806650 2.490889 1013.25 980.665 1000 68.94757 1) psia = psi absolute Example: 29.9213 inHg = 29.9213 × 33.86388 hPa = 1013.
Chapter 4 ________________________________________________________________ Operation Using Serial Line To set time enter the TIME command. To set date enter the DATE command. TIME DATE These time and date settings are shown on the timestamps of PLAY command. When you want to include time and date in the R and SEND commands, use the FTIME and FDATE commands.
USER'S GUIDE____________________________________________________________________ 9. Use the arrow buttons to select ECHO. Press ON to turn to it on. Press OFF to turn it off. Press EXIT to return to the basic display. 10. SERI Use the serial line command SERI [b p d s] to set communication settings for the user port.
Chapter 4 ________________________________________________________________ Operation Table 28 Selection of Output Modes Mode STOP RUN POLL Output Only by command Automatic output Only with command SEND [addr] SEND One message at power-up Commands used All (default mode) Only command S Use with RS-485 buses, see RS-422/485 Interface on page 53. Selected output mode will be activated after power outages. INTV Use the command INTV[xxx yyy] to set the outputting interval for the RUN mode.
USER'S GUIDE____________________________________________________________________ Data Filtering The averaging data filter calculates a average over a certain period of time. The lowest measurement noise is achieved with the extended filtering. There are three filtering levels available.
Chapter 4 ________________________________________________________________ Operation - information on Purge settings Display Alarm settings serial interface information network settings and status of the LAN and WLAN interfaces analog output information relay output information 0706-012 Figure 58 Following Device Information on the Display Proceed in the information views by pressing the MORE button as many times as you get the desired information.
USER'S GUIDE____________________________________________________________________ Example: >? DMT340 / 3.01 Serial number : Batch number : Adjust. date : Adjust. info : Date : Time : Serial mode : Baud P D S : Output interval: Address : Echo : Pressure : Filter : Ch1 output : Ch2 output : Ch1 Tdf low : Ch1 Tdf high : Ch2 x low : Ch2 x high : Module 1 : Module 2 : > A3220001 A3120029 2005-08-09 Vaisala/HEL 2000-01-01 00:42:41 STOP 4800 E 7 1 0 s 0 ON 1000.00 hPa ON 4...20mA 4...20mA 0.00 'C 100.00 'C 0.
Chapter 4 ________________________________________________________________ Operation >ERRS FAIL Error: Temperature measurement malfunction Error: Humidity sensor open circuit > VERS Use the command VERS to display software version information. Example: >vers DMT346 / 3.01 > Resetting the Device Use the serial line to reset the device. Use the command RESET to reset the device. The user port switches to start-up output mode selected with command SMODE.
USER'S GUIDE____________________________________________________________________ Examples: >lock 1 4444 Keyboard lock > : 1 [4444] >lock 1 Keyboard lock > : 1 Data Recording Data recording function is always on and collects data automatically into the memory of the device. If the optional data logger module is installed, the transmitter uses it automatically. Recorded data does not disappear from the memory when the power is switched off.
Chapter 4 ________________________________________________________________ Operation Issue the command without parameters and press Enter to display current recording parameters. Example: >dsel tdf x Tdf x >dsel Tdf x > View Recorded Data If the device is provided with the optional display, the graphical display shows the data of the selected quantities, one at a time. See section Graphic History on page 64 for details about graphical display.
USER'S GUIDE____________________________________________________________________ Example (data logger module installed): >dir File 1 T 2 T 3 T 4 T 5 T 6 T 7 Tdf 8 Tdf 9 Tdf 10 Tdf 11 Tdf 12 Tdf > description (90 s intervals) (12 min intervals) (2 h intervals) (12 h intervals) (3 d intervals) (12 d intervals) (90 s intervals) (12 min intervals) (2 h intervals) (12 h intervals) (3 d intervals) (12 d intervals) Oldest data available 2007-05-30 05:25:30 2007-05-29 05:48:00 2007-05-19 02:00:00 2007-03-23 12:0
Chapter 4 ________________________________________________________________ Operation where start_time = end_date = end_time = Starting time of the interval to be outputted. Must be given in the following format: hh:mm:ss Ending date of the interval to be outputted. Must be given in the following format: yyyy-mm-dd Ending time of the interval to be outputted.
USER'S GUIDE____________________________________________________________________ 3. CAUTION Select Clear graph memories by pressing the CLEAR button. Press the YES button to confirm the selection. This function clears the entire data history of the transmitter, including all graphs and the content of the optional data logger module. UNDELETE Similarly to the DELETE command, the UNDELETE command is used without any arguments. It will recover all deleted data that has not been overwritten yet.
Chapter 4 ________________________________________________________________ Operation 0503-045 Figure 59 Current/Voltage Switches of Output Modules Numbers refer to Figure 59 above: NOTE 1 2 = = 3 = Current/voltage selection output switches (from 1 to 2) Current/voltage range selection switches (from 3 to 7) in analog output 1 and 2. Switches for service use only. Keep in OFF position always. Only one of the switches, 1 or 2, must be ON at a time.
USER'S GUIDE____________________________________________________________________ Example: 0 ... 5 V voltage output selected for channel 1 and 4 ... 20 mA selected for channel 2. 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 NOTE OFF █ ON Selection █ Voltage output selected █ 0 ... 5 V selected █ Current output selected █ 4 ...
Chapter 4 ________________________________________________________________ Operation 5. 6. 7. 8. 9. Select Quantity by pressing the ▲▼ arrow buttons. Confirm your selection by pressing CHANGE. Select the quantity by using the arrow buttons. Press SELECT to confirm your selection. Select Scale, lower limit, by pressing the ▲▼arrow buttons. Press SET to confirm your selection. Press OK to confirm your setting. Select the upper limit by pressing the ▲▼arrow buttons.
USER'S GUIDE____________________________________________________________________ Analog Output Tests Use the display/keypad for testing to test the operation of the analog by forcing the outputs to known values. Measure then the values with a current/voltage meter. Use the display/keypad for testing. 1. 2. 3. 4. 5. 6. Open the MAIN MENU by pressing any of the ▲▼◄► arrow buttons. Select System by pressing the ► arrow button. Select Diagnostics by pressing the ► arrow button.
Chapter 4 ________________________________________________________________ Operation Analog Output Fault Indication Setting Factory default state for analog outputs during error condition is 0 V/ 0 mA. Please be careful when selecting the new error value. The error state of the transmitter should not cause unexpected problems in process monitoring. Use the display/keypad to set the analog output fault indication. 1. 2. 3. 4. 5. 6. Open the MAIN MENU by pressing any of the ▲▼◄► arrow buttons.
USER'S GUIDE____________________________________________________________________ Operation of Relays Quantity for Relay Output A relay monitors the quantity chosen for the relay output. Any of the quantities available can be chosen. Measurement-Based Relay Output Modes Relay Setpoints When the measured value is in between the "above" and "below" values, the relay is passive.
Chapter 4 ________________________________________________________________ Operation Mode 4 is usually used if an alarm needs to be triggered when the measured value exceeds a safe range. The relay is active when measurement is in range, and is released if the value goes out of range or the measurement fails. NOTE If the measurement of the selected quantity fails or the transmitter loses its power, the relay is released.
USER'S GUIDE____________________________________________________________________ Relay Indicating Transmitter Error Status You can set a relay to follow the operation status of the device.
Chapter 4 ________________________________________________________________ Operation 0610-077 Figure 61 FAULT/ONLINE STATUS Relay Output Modes FAULT/ONLINE STATUS relays are usually used in conjunction with an analog output to obtain validity information for the output value. NOTE If transmitter loses its power, all status-based relays are released similarly to the case of an instrument failure.
USER'S GUIDE____________________________________________________________________ Setting Relay Outputs NOTE When having only one relay module installed, its relays are called 'relay 1' and 'relay 2'.
Chapter 4 ________________________________________________________________ Operation RSEL Use the serial line to select the quantity, setpoints and hysteresis or enable/disable the relay outputs. Issue the RSEL command. Syntax: RSEL [q1 q2 q3 q4] where q1 q2 q3 q4 = = = quantity for the relay 1 or Fault/Online quantity for the relay 2 or Fault/Online quantity for the relay 3 or Fault/Online quantity for the relay 4 or Fault/Online Factory setting: all relays disabled.
USER'S GUIDE____________________________________________________________________ Example of using relay 1 as fault alarm: Selecting relay 1 to follow the fault status and relay 2 to follow the temperature measurement. >rsel fault ts Rel1 FAUL above: Rel1 FAUL below: Rel1 FAUL hyst : Rel1 FAUL enabl: Rel2 Ts above: Rel2 Ts below: Rel2 Ts hyst : Rel2 Ts enabl: > ON ? on 140.00 'C ? 140 80.00 'C ? 80 2.00 'C ? 2 ON ? on Testing Operation of Relays Testing activates relays even if they are disabled.
Chapter 4 ________________________________________________________________ Operation Operation of the RS-485 Module RS-485 interface enables communication between RS-485 network and DMT346 transmitter. The RS-485 interface is isolated and offers a maximum communications rate of 115 200 bits/s. (For maximum bus length of 1 km, use bit rate 19200 b/s or less.
USER'S GUIDE____________________________________________________________________ ECHO Use the ECHO [x] command to enable/disable echo of characters received over the serial line. Syntax: ECHO [x] where x = ON/OFF (default = OFF) When using 2-wire connection, echo must be always disabled. SMODE Use the SMODE [xxxx] command to set the serial interface mode.
Chapter 4 ________________________________________________________________ Operation Sets the RUN mode output interval. The time interval is used only when the RUN mode is active. 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. ADDR Addresses are required only for POLL mode (see serial line command SMODE on page 96). Use the ADDR [aa] command to input the RS-485 transmitter address.
USER'S GUIDE____________________________________________________________________ Example: >OPEN 2 (opens the line to transmitter 2, other transmitters stay in POLL mode) >CRH(for example, calibration performed) ... >CLOSE (line closed) SDELAY With the sdelay command you can set delay (response time) for user port (RS-232 or RS-485), or view currently set delay value. Value corresponds to tens of milliseconds (eg. 5 = 0.050s minimum answer delay). The value can be set between 0...254.
Chapter 4 ________________________________________________________________ Operation If the adjustment in the AutoCal reaches a preset maximum value or if the AutoCal correction fails, for example, because of unstable conditions, a new AutoCal will take place later (if the automatic AutoCal is turned on). Automatic AutoCal As a default, the automatic AutoCal in DMT345 and DMT346 is turned on.
USER'S GUIDE____________________________________________________________________ Sensor Purge Sensor Purge is available for DMT345 and DMT346. The Purge should be carried out to achieve the shortest response times and the best longterm stability. Sensor Purge is an automatic procedure, in which the sensor is dried. Thus, the sensor will response very fast when installing the probe from an ambient to a dry gas.
Chapter 4 ________________________________________________________________ Operation Interval Purge When DMT345 and DMT346 leave the factory the interval Purge takes place repeatedly with the time intervals set in the factory. The user can change the interval in which the purge takes place by using serial commands or with the optional display/keypad. This can be needed if the measuring environment contains high concentrations of interfering chemicals.
USER'S GUIDE____________________________________________________________________ NOTE When Purge in power up is enabled, wait about 5 min after power up before taking measurements. The output channels are locked for the first operation minutes to the initial measured values. PURGE Use the command PURGE to start the manual Purge. Issue command PURGE to start Purge immediately. Example: >purge Purge started, press any key to abort. > The prompt '>' appears when the heating period is over.
Chapter 5 ______________________________________________________________ Maintenance CHAPTER 5 MAINTENANCE This chapter provides information that is needed in basic maintenance of the product. Possible error states and situations, their probable causes and remedies are described in this chapter. This chapter also contains contact information for Vaisala Technical Support and Vaisala Service Centers.
USER'S GUIDE____________________________________________________________________ 0706-017 Figure 66 Error Indicator and Error Message Number refers to Figure 66 above: 1 = Error Indicator - The error indicator disappears when the error state is over and you have checked the error message. Press the INFO button to display the error message. Table 30 Error Messages Error Code Error Message 0 Humidity sensor measurement malfunction.
Chapter 5 ______________________________________________________________ Maintenance Error Code Error Message 14 Device internal temperature out of range 15 Operating voltage out of range 18 Internal ADC reference voltage out of range 19 20 … 23 24 … 25 26 28 … 29 30 31 Internal analog output reference voltage out of range Configuration switches for analog output 1/2/3 set incorrectly EEPROM failure on add-on module 1 (or 2) Communication module installed in incorrect add-on module slot Unknown/incomp
USER'S GUIDE____________________________________________________________________ 3. 4. 5.
Chapter 6 ___________________________________________________Calibration and Adjustment CHAPTER 6 CALIBRATION AND ADJUSTMENT This chapter provides you with instructions on how to calibrate and adjust Vaisala DRYCAP® Dewpoint Transmitters DMT345 and DMT346. Calibration DMT345 and DMT346 are fully calibrated and adjusted as shipped from the factory. The typical calibration interval is one year.
USER'S GUIDE____________________________________________________________________ Opening and Closing Adjustment Mode Open the transmitter cover. The buttons needed in the adjustment are on the left-hand side of the motherboard, see Figure 2 on page 23. Press the ADJ button to enable the adjustment mode. The indicator led indicates the adjustment availability.
Chapter 6 ___________________________________________________Calibration and Adjustment Example: >ctext Adjust. info > : (not set) ? -60ºC Use the command CDATE to input date to the adjustment information field. Set the adjustment date in format YYYY-MM-DD. Example: >cdate Adjust. date > : (not set) ? 2004-05-21 Press the adjustment button on the motherboard inside the transmitter to disable the adjustment function.
USER'S GUIDE____________________________________________________________________ 5. 6. Wait at least 30 minutes for the sensor to stabilize. Follow the stabilization from the GRAPH display. Press EXIT to return to the previous display. Press READY when stabilized. Enter the reference value by using the arrow keys. 0706-019B Figure 68 7. 8. Waiting for Readings to Stabilize Now proceed to the adjustment at the wet end reference condition (30 ...
Chapter 6 ___________________________________________________Calibration and Adjustment 8. When the reading is stabilized, give the reference humidity after the question mark and press Enter. >fcrh RH : 11.25 Ref1 ? RH : 11.25 Ref1 ? RH : 11.25 Ref1 ? RH : 11.24 Ref1 ? RH : 11.24 Ref1 ? 11.3 Press any key when ready ... 9. 10. 11. Now the device is waiting for the wet end reference. Insert the probe in the wet end reference condition (30 ... 75 %RH). Press any key when ready.
USER'S GUIDE____________________________________________________________________ One-Point Dewpoint Adjustment One-Point Dewpoint Adjustment Using Display/Keypad NOTE This is a highly critical adjustment, to be performed only in laboratory conditions. Preferably use the display/keypad interface to perform one-point dewpoint Td/f adjustment. Before proceeding with the Td/f adjustment you must perform the RH adjustment.
Chapter 6 ___________________________________________________Calibration and Adjustment 0706-044 Figure 70 5. 6. Proceeding with T d/f Adjustment Enter the actual reference frostpoint temperature. The transmitter performs Td/f adjustment. This may take up to six (6) minutes. 0706-045 Figure 71 7. NOTE Completing T d/f Adjustment The adjustment is now completed. Several AutoCals can be necessary after this adjustment has been performed until the transmitter reaches full accuracy.
USER'S GUIDE____________________________________________________________________ Example: >a01 Tf : -34.25 'C Ref ? -33 Wait for Purge data...OK > 4. NOTE Press the ADJ button on the motherboard inside the transmitter to disable adjustments. Several AutoCals can be necessary after this adjustment has been performed until the transmitter reaches full accuracy. Adjusting Temperature NOTE Temperature adjustment in process conditions is possible only with DMT345.
Chapter 6 ___________________________________________________Calibration and Adjustment 8. Press OK to return to the adjustment menu 9. Press EXIT to return to the basic display. Adjusting Temperature Using Serial Line CT Use the serial line command CT to adjust the temperature. 1. 2. 3. 4. Press the ADJ button on the motherboard to open the adjustment mode. Remove the probe filter and insert the probe into the reference temperature. Type CT and press Enter.
USER'S GUIDE____________________________________________________________________ Adjusting Analog Outputs In the analog output calibration the analog output is forced to the following values: current output voltage output = 2 mA and 18 mA = 10 % and 90 % of the range Connect DMT346 to a calibrated current/voltage meter in order to measure either current or voltage depending on the selected output type. Use the display/keypad or the serial line to do this. Adjusting Analog Outputs Using Display/Keypad 1.
Chapter 6 ___________________________________________________Calibration and Adjustment Adjusting Analog Outputs Using Serial Line ACAL Use the serial line to perform the analog output adjustment. Use the ACAL command and enter the multimeter reading. Example (current outputs): >ACAL Ch1 Ch1 Ch2 Ch2 > I1 I2 I1 I2 (mA) (mA) (mA) (mA) ? ? ? ? 2.046 18.087 2.036 18.071 Press the adjustment button on the motherboard inside the transmitter again to disable the adjustment function.
USER'S GUIDE____________________________________________________________________ CHAPTER 7 TECHNICAL DATA This chapter provides the technical data of the product. Specifications Performance Table 32 Dewpoint Specifications DMT345 Property Sensor Measurement range Accuracy Response time 63% [90%] flow rate 1l/min and 1 bar pressure from dry to wet from wet to dry including autocalibration Description / Value Vaisala DRYCAP®180S -40 ... +100 °C (-40 … +212 °F) Td ±2 °C (±3.
Chapter 7 ____________________________________________________________ Technical Data 0605-043 Figure 72 Dewpoint Measurement Accuracy Graph DMT345 Table 33 Temperature Specifications DMT345 Property Measurement range with sensor warming Accuracy Temperature sensor Table 34 Relative Humidity Specifications DMT345 Property Measurement range with sensor warming Accuracy below 10% RH above 10% RH Table 35 Description / Value 0 ... +180 °C (+32 ...
USER'S GUIDE____________________________________________________________________ Table 36 Dewpoint Specifications DMT346 Property Sensor Measurement range Accuracy Response time 63% [90%] flow rate 1l/min and 1 bar pressure from dry to wet from wet to dry including autocalibration Description / Value Vaisala DRYCAP®180S -25 … +100 °C (-13 … +212 °F) Td ±2 °C (±3.
Chapter 7 ____________________________________________________________ Technical Data Complies with EMC standard EN61326-1:1997 + Am1:1998 + Am2:2001 Industrial Environment Table 39 Inputs and Outputs Specifications (Both Models) Property Operating voltage with optional power supply module Default start-up time initial reading after power-up full operation after sensor Purge and AutoCal Power consumption @ 20 °C (Uin 24 VDC) Uout 2 × 0 ... 1V / 0 ... 5V / 0 ... 10V Iout 2 × 0 ...
USER'S GUIDE____________________________________________________________________ Technical Specifications of Optional Modules Power Supply Module Operating voltage Connections Bushing Operating temperature Storage temperature UL file number 100 ... 240 VAC 50/60 Hz screw terminals for 0.5 ... 2.5 mm2 wire (AWG 20 ... 14) for 8 ... 11 mm diameter cable -40 ... +60 °C (-40 ... +140 °F) -40 ... +70 °C (-40 ...
Chapter 7 ____________________________________________________________ Technical Data RS-485 Module Operating temperature range Operating modes Operating speed max Bus isolation Power consumption @ 24V External loads standard loads Storage temperature range Max wire size -40 ... +60 ºC (-40 ... +140 ºF) 2-wire (1-pair) half duplex 4-wire (2-pair) full duplex 115.2 kbaud 300VDC max 50 mA 32 RL> 10kohm -55 ... +80 ºC (-67 ... +176 ºF) 1.
USER'S GUIDE____________________________________________________________________ Options and Accessories Table 41 Options and Accessories Item MODULES Relay module Analog Output Module Isolated RS485 Module Power Supply Module Galvanic Isolation Module FILTERS for DMT345 Sintered Filter AISI 316L for DMP246CS Sintered Filter AISI316L D=20mm TRANSMITTER MOUNTING ACCESSORIES Wall Mounting Kit Installation Kit for Pole or Pipeline Rain Shield with Installation Kit DIN Rail Clips with Installation Plate Pane
Chapter 7 ____________________________________________________________ Technical Data Dimensions (mm/inch) 0605-044 Figure 74 DMT345/346 Transmitter Body Dimensions VAISALA ______________________________________________________________________ 149
USER'S GUIDE____________________________________________________________________ 0804-035 Figure 75 WLAN Antenna Dimensions 150 _________________________________________________________________ M210762EN-D
Appendix A ______________________________________________Example Installation of DMT346 APPENDIX A EXAMPLE INSTALLATION OF DMT346 This Appendix illustrates an example installation of DMT346 transmitter into a process. 0605-045 Figure 76 1. 2. 3. Cooling Set Installation Make a round 89.5 + 0.5 mm hole on the process wall. Weld the tube of the mounting flange tightly on the inner metal plate of the process wall. If the process wall is more than 125 mm thick, a lengthening piece (max.
USER'S GUIDE____________________________________________________________________ 4. NOTE Unfasten the locking screws on the cooling bar so that you can push the probe into the bar. Push the probe deep enough: make sure that the marking hole meets the end of the bar. 5. Lock the probe in place by tightening the locking screws on the bar. Probe and Cooling Set Mounting with Process Shut Down - Complete the entire mounting process as instructed on page 36.
Appendix B ______________________________________________________ Calculation Formulas APPENDIX B CALCULATION FORMULAS This Appendix contains the formulas used for the calculated output quantities. The DMT346 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: Dewpoint: Td Tn m 1 Pw log A (1) Pw is the water vapor pressure.
USER'S GUIDE____________________________________________________________________ Absolute humidity: a 216.68 Pw T (3) Enthalpy: h (T 273.15) (1.01 0.00189 x) 2.5 x (4) The water vapor saturation pressure Pws is calculated by using two equations (5 and 6): 3 T CiT i (5) i o where: T Ci C0 C1 C2 C3 = = = = = = temperature in K coefficients 0.4931358 -0.46094296 × 10-2 0.13746454 × 10-4 -0.
Appendix B ______________________________________________________ Calculation Formulas The water vapor pressure is calculated using: Pw RH Pws 100 (7) Parts per million by volume is calculated using: ppmv 106 Pw p Pw (8) Symbols: Td Pw Pws RH x p a T h = = = = = = = = = dewpoint temperature (°C) water vapour pressure (hPa) water vapour saturation pressure (Pa) relative humidity (%) mixing ratio (g/kg) atmospheric pressure (hPa) absolute humidity (g/m3) temperature (K) enthalpy (kJ/
USER'S GUIDE____________________________________________________________________ 156 _________________________________________________________________ M210762EN-D
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