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Related Manuals for Vaisala DRYCAP DMT345
Summary of Contents for Vaisala DRYCAP DMT345
- Page 1 USER'S GUIDE Vaisala DRYCAP® Dewpoint Transmitters DMT345 and DMT346 M210762EN-E...
- Page 2 The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of...
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Page 3: Table Of Contents
DMT346 Probe and Cooling Set Mounting......35 Description of the Cooling Set..........36 Parts of the Cooling Set ..........37 General Probe and Cooling Set Mounting Instructions..38 Probe and Cooling Set Mounting with Process Shut Down ................40 VAISALA ________________________________________________________________________ 3... - Page 4 USER'S GUIDE____________________________________________________________________ Probe and Cooling Set Mounting with Process Running ................40 Removing the Transmitter for Maintenance ....40 Wiring..................41 Cable Bushings ..............41 Cable Grounding ..............42 Transmitter Housing Grounding ..........43 Signal and Power Supply Wiring .........43 Connections to a 24 VAC Power Supply......45 Optional Modules ..............46 Power Supply Module ............46 Installation ..............47...
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Page 5: Vaisala
Locking Menu/Keypad Using Serial Line ......109 LOCK ................109 Serial Output Settings............110 Using Display/Keypad ............110 Using Serial Line ............... 111 SERI................111 SMODE ................ 112 ADDR ................112 INTV ................113 SDELAY ............... 113 ECHO................113 Data Recording..............114 VAISALA ________________________________________________________________________ 5... - Page 6 USER'S GUIDE____________________________________________________________________ Selecting Data Recording Quantities ........114 DSEL ................114 View Recorded Data ............115 DIR ................115 PLAY ................116 Deleting Recorded Files ............117 UNDELETE ..............117 Analog Output Settings ............118 Changing Output Mode and Range........118 Analog Output Quantities ..........120 AMODE/ASEL ..............120 Analog Output Tests............121 ITEST ................122 Analog Output Fault Indication Setting......122 AERR................123...
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Page 7: Vaisala
RS-485 Module ............168 LAN Interface Module ..........168 WLAN Interface Module..........168 Data Logger Module ............ 169 Options and Accessories ............ 170 Dimensions (mm/inch)............171 APPENDIX A EXAMPLE INSTALLATION OF DMT346 ..........173 APPENDIX B CALCULATION FORMULAS ..............175 VAISALA ________________________________________________________________________ 7... - Page 8 USER'S GUIDE____________________________________________________________________ APPENDIX C MODBUS REFERENCE ................179 Function Codes..............179 Register Map .................180 Data Encoding ..............180 32-Bit Floating Point Format ........180 16-Bit Integer Format ...........181 Measurement Data (Read-Only) ........182 Status Registers (Read-Only) ...........183 Configuration Registers.............183 Exception Status Outputs............184 Diagnostic Sub-Functions ...........185 Device Identification Objects ..........186 Exception Responses ............186 8 ___________________________________________________________________ M210762EN-E...
- Page 9 Service Port Connector and User Port Terminal on the Motherboard ................76 Figure 49 Connection Example between PC Serial Port and User Port .................. 77 Figure 50 Network Interface Menu ............81 Figure 51 IP Configuration Menu.............. 81 Figure 52 Wireless LAN Settings.............. 84 VAISALA ________________________________________________________________________ 9...
- Page 10 USER'S GUIDE____________________________________________________________________ Figure 53 Entering Network SSID.............84 Figure 54 Selecting the Wireless Network Type........84 Figure 55 Web Configuration Interface for WLAN ........87 Figure 56 Opening a Serial Connection............88 Figure 57 Opening a Telnet Connection...........89 Figure 58 Pressure Set Buttons on Motherboard ........102 Figure 59 Device Information on Display..........105 Figure 60...
- Page 11 Table 48 Configuration Parameter Registers........183 Table 49 Configuration Flag Registers..........184 Table 50 Exception Status Outputs............184 Table 51 MODBUS Diagnostics ............185 Table 52 MODBUS Device Identification ..........186 Table 53 MODBUS Exception Responses..........186 VAISALA _______________________________________________________________________ 11...
- Page 12 USER'S GUIDE____________________________________________________________________ This page intentionally left blank. 12 __________________________________________________________________ M210762EN-E...
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Page 13: General Information
Vaisala Technical Support. - Chapter 7, Calibration and Adjustment, provides you with instructions on how to calibrate and adjust Vaisala DRYCAP® Dewpoint Transmitters DMT345 and DMT346. - Chapter 8, Technical Data, provides the technical data of the product. -
Page 14: Version Information
HyperTerminal. Removed Humicap 180L2 sensor option. Related Manuals Table 2 Related Manuals Manual Code Manual Name M010091EN Vaisala DRYCAP® Hand-Held Dewpoint Meter DM70 User's Guide M210185EN Humidity Calibrator HMK15 User's Guide Documentation Conventions Throughout the manual, important safety considerations are highlighted as follows: WARNING Warning alerts you to a serious hazard. -
Page 15: Safety
ESD Protection Electrostatic Discharge (ESD) can cause immediate or latent damage to electronic circuits. Vaisala products are adequately protected against 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. -
Page 16: Regulatory Compliances
USER'S GUIDE____________________________________________________________________ Regulatory Compliances EU Declaration of Conformity The Vaisala Vaisala HUMICAP® Humidity and Temperature Transmitters DMT345 and DMT346 are in conformity with the provisions of the following EU directives: - Low Voltage Directive - EMC-Directive Conformity is shown by compliance with the following standards:... -
Page 17: Transmitters With Wlan Interface
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. -
Page 18: Warranty
USER'S GUIDE____________________________________________________________________ Warranty Visit our Internet pages for more information and our standard warranty terms and conditions: www.vaisala.com/services/warranty.html. Please observe that any such warranty may not be valid in case of damage due to normal wear and tear, exceptional operating conditions, negligent handling or installation, or unauthorized modifications. -
Page 19: Chapter 2 Product Overview
350 °C. DMT346 also outputs sensor saturation rate (SSR) and temperature (T ) of the cooled Vaisala DRYCAP® sensor. Because the sensor is Sensor cooled, these values do not represent true process conditions, hence they cannot be used for process control. -
Page 20: Basic Features And Options
USER'S GUIDE____________________________________________________________________ Table 3 Output Quantities for DMT345 Quantity Abbreviation Metric Unit Non-Metric Unit Dewpoint/frost point temperature (T ºC ºF Mixing ratio (x) g/kg gr/lb Relative humidity RH Temperature T ºC ºF Table 4 Optional Output Quantities and for DMT345 Quantity Abbreviation Metric Unit Non-Metric Unit... -
Page 21: Operating Principle
- Additional analog output module - Alarm relay module Operating Principle The DMT345/346 transmitter incorporates the Vaisala DRYCAP® sensor together with a combined temperature measurement with a PT100 resistive temperature sensor. The operating principle of the DRYCAP® sensor is based on the changes in capacitance as its thin polymer film absorbs water molecules. -
Page 22: Structure Of The Transmitter
USER'S GUIDE____________________________________________________________________ Structure of the Transmitter 1104-001 Figure 1 Transmitter Body The following numbers refer to Figure 1 above: 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-E... -
Page 23: Figure 2 Inside The Transmitter
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 isolation module (optional) Adjustment button and Manual AutoCal buttons with indicator LED and pressure set buttons. VAISALA _______________________________________________________________________ 23... -
Page 24: Probes And Cooling Set
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. Optional mounting flange for DMT345 probe 24 __________________________________________________________________ M210762EN-E... -
Page 25: Chapter 3 Installation
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. Air should circulate freely around the sensor. VAISALA _______________________________________________________________________ 25... -
Page 26: Mounting The Housing
USER'S GUIDE____________________________________________________________________ Mounting the Housing The housing can be mounted either without the mounting plate or with optional mounting plates. Standard Mounting without Mounting Plate Mount the housing without the mounting plate by fastening the transmitter to the wall with 4 screws, for example, M6 (not provided). 0804-066 Figure 4 Standard Mounting... -
Page 27: Wall Mounting With Wall Mounting Kit
Chapter 3 _______________________________________________________________ Installation 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. -
Page 28: Figure 7 Mounting With Metal Wall Mounting Plate
USER'S GUIDE____________________________________________________________________ Metal mounting plate is included in rain shield with installation kit and installation kit for pole or pipeline. 0604-011 Figure 7 Mounting with Metal Wall Mounting Plate The following numbers refer to Figure 7 above: Mount the plate to wall with 4 screws M8 (not provided) Fasten the transmitter to the mounting plate with 4 fixing screws M6 (provided) Note the position of the arrow when mounting. -
Page 29: Figure 8 Dimensions Of The Metal Mounting Plate (In Mm)
Chapter 3 _______________________________________________________________ Installation 0604-012 Figure 8 Dimensions of the Metal Mounting Plate (in mm) VAISALA _______________________________________________________________________ 29... -
Page 30: Mounting With Din Rail Installation Kit
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). Attach two spring holders to the plastic mounting plate by using the screws provided in the installation kit. -
Page 31: Pole Installation With Installation Kit For Pole Or Pipeline
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 upward, see Figure 7 on page 28. -
Page 32: Mounting Rain Shield With Installation Kit
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. -
Page 33: Figure 13 Panel Mounting Frame
Chapter 3 _______________________________________________________________ Installation 0704-002 Figure 13 Panel Mounting Frame The following numbers refer to Figure 13 above: Panel (not included) Panel mounting frame 0804-083 Figure 14 Panel Mounting Dimensions (mm/inch) VAISALA _______________________________________________________________________ 33... -
Page 34: Dmt345 Probe Mounting
Vaisala. The duct installation kit includes a flange, a sealing ring and screws for attaching the flange to the process or duct wall (Vaisala order code: 210696). 0604-019... -
Page 35: Dmt346 Probe And Cooling Set Mounting
DMT346 Probe and Cooling Set Mounting 334.5 ø1 22.5 ø13.5 0604-020 Figure 17 DMT346 Probe Dimensions (in mm) The following numbers refer to Figure 17 above: Stainless steel grid Cable (length 2 m, 5 m or 10 m) VAISALA _______________________________________________________________________ 35... -
Page 36: Description Of The Cooling Set
USER'S GUIDE____________________________________________________________________ Description of the Cooling Set 27.5 112.5 40.6 sintered filter (fixed on top of the cooling set) mounting cooling element cooling fins flange Figure 18 Cooling Set Dimensions (in mm) The cooling set consists of a cooling element and removable cooling fins. The cooling fins are meant to be installed in applications where the process temperature and dewpoint are continuously in the range indicated in Figure 19 on page 37 (Measurement Ranges with and without the... -
Page 37: Parts Of The Cooling Set
Measurement Ranges with and without the Cooling Fins Parts of the Cooling Set cooling 15° 104.5 profile flange screen tube cooling cooling bush flange SECTION M6×60 DIN912 (AISI 316) 0604-023 Figure 20 Parts of the Cooling Set (Dimensions in mm) VAISALA _______________________________________________________________________ 37... -
Page 38: General Probe And Cooling Set Mounting Instructions
USER'S GUIDE____________________________________________________________________ lengthening max. 50 piece (pipe) welding mounting ø105 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. Note the additional instructions in the following sections regarding specific situations (mounting with process shut down, mounting with process running, removing the transmitter for maintenance). -
Page 39: Figure 22 Installing The Probe Through Process Wall
< 160 wall thickness 0604-025 Figure 23 Installing Probe through Thick Walls VAISALA _______________________________________________________________________ 39... -
Page 40: Probe And Cooling Set Mounting With Process Shut Down
USER'S GUIDE____________________________________________________________________ Probe and Cooling Set Mounting with Process Shut Down Complete the entire mounting process as instructed on page 38. Probe and Cooling Set Mounting with Process Running Follow this procedure to reduce the amount of condensation that builds up in the installation hole. -
Page 41: Wiring
NOTE When there is high electric noise level (for example near powerful electric motor) in the operating environment it is recommended to use shielded cable or take care that the signal cables are separated from other cables. VAISALA _______________________________________________________________________ 41... -
Page 42: Cable Grounding
USER'S GUIDE____________________________________________________________________ Cable Grounding Ground the screen of the electrical cable properly to achieve the best possible EMC performance. 0605-027 Figure 25 Grounding the Screen of Electrical Cable Refer to Figure 25 on page 42 when performing the procedure below. Cut back outer sheath to desired length. -
Page 43: Transmitter Housing Grounding
Connector on page 64. 0605-028 Figure 26 Screw Terminal Block on the Motherboard The following numbers refer to Figure 26 above: Supply terminals POWER 10 ... 35 VDC = 24 V~ User port (RS-232 terminals) Analog signal terminals VAISALA _______________________________________________________________________ 43... - Page 44 USER'S GUIDE____________________________________________________________________ WARNING Make sure that you connect only de-energized wires. 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.
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Page 45: Connections To A 24 Vac Power Supply
To prevent fire and/or damage, if either 24 VAC wire is grounded or connected to a "-", "0", or "GND" terminal of any other device, you must connect the same wire on the "-" terminal also on this instrument. 0703-041 Figure 27 Connections to 24 VAC Power Supply VAISALA _______________________________________________________________________ 45... -
Page 46: Optional Modules
USER'S GUIDE____________________________________________________________________ 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. 0605-030 Figure 28 Power Supply Module The following numbers refer to Figure 28 above: = Connect AC mains voltage wires to these terminals = Grounding terminal... -
Page 47: Installation
Do not detach the power supply module from the transmitter when the power is on. WARNING Do not connect the mains power to power supply module when it is not installed in the transmitter. Always connect protective ground terminal. WARNING VAISALA _______________________________________________________________________ 47... -
Page 48: Warnings
USER'S GUIDE____________________________________________________________________ Warnings Dieses Produkt entspricht der Niederspannungsrichtlinie (2006/95/EWG). Das Netzmodul darf nur von einem dazu befugten Elektriker angeschlossen werden. Trennen Sie das Netzmodul nicht vom Messwertgeber, wenn der Strom eingeschaltet ist. Verbinden Sie das Netzmodul nur mit der Spannungsquelle, wenn es im Messwertgeber DMT345/346 montiert ist. - Page 49 Ez a termék megfelel a Kisfeszültségű villamos termékek irányelvnek (2006/95/EGK). A hálózati feszültséget csak feljogosított elektrotechnikus csatlakoztathatja a tápegységmodulra. A bekapcsolt távadóról ne csatolja le a tápegységmodult. Ne csatlakoztassa a hálózati feszültséget a tápegységmodulhoz, ha az nincs beépítve a DMT345/346 távadóba. Feltétlenül csatlakoztasson földelő védőkapcsot! VAISALA _______________________________________________________________________ 49...
- Page 50 USER'S GUIDE____________________________________________________________________ Šis produktas atitinka direktyvą dėl žemos įtampos prietaisų (2006/95/EB). Elektros tinklą su energijos tiekimo moduliu sujungti gali tik įgaliotas elektrikas. Niekada neišimkite energijos tiekimo modulio iš siųstuvo, kai maitinimas yra įjungtas. Jei energijos tiekimo modulis nėra įmontuotas DMT345/346 siųstuve, nejunkite jo į elektros tinklą.
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Page 51: Galvanic Isolation For Output
Galvanic Output Isolation Module Third Analog Output 0503-030 Figure 30 Third Analog Output The following numbers refer to Figure 30 above: Flat cable pins Screw terminals for signal line DIP switches to select the output mode and range VAISALA _______________________________________________________________________ 51... -
Page 52: Installation And Wiring
USER'S GUIDE____________________________________________________________________ Installation and Wiring Disconnect the power. In case the analog output module is installed in the factory, continue with the step 4. Open the transmitter cover and and fasten the analog output module to the position for MODULE 2 with four screws. Refer to Figure 2 on page 23. -
Page 53: Alarm Relays
C and NO outputs are closed, NC is open. Connect the power and close the cover. For instructions on how to operate the relay (for example, selecting quantity for the relay output and setting the relay setpoints), see section Operation of Relays on page 123. VAISALA _______________________________________________________________________ 53... -
Page 54: Figure 32 Relay Module
USER'S GUIDE____________________________________________________________________ 0605-032 Figure 32 Relay Module The following numbers refer to Figure 32 above: Indication led for the relay 1 or 3 Relay test buttons Flat cable pins Indication led for relay 2 or 4 The relay module may contain dangerous voltages even if the transmitter WARNING power has been disconnected. -
Page 55: Rs-422/485 Interface
A and B instead of D1+ and D0-. When the line is idle, D1+ has positive voltage compared to D0-. When connecting the module, be prepared to swap the D1+ and D0- wires if you have a communication problem. VAISALA _______________________________________________________________________ 55... -
Page 56: Installation And Wiring
USER'S GUIDE____________________________________________________________________ Installation and Wiring Disconnect the power. In case the RS-422/485-module is installed in the factory, continue with the item 4. To attach the module, open the transmitter cover and fasten the RS-422/485 module to the bottom of the housing with four screws. Connect the flat cable between the RS-422/485 module and the motherboard's pins MODULE1 (Communications). -
Page 57: Figure 34 4-Wire Rs-485 Bus Connections, Part A
Figure 34 4-Wire RS-485 Bus Connections, Part A Table 7 4-Wire (Switch 3: On) RS-485 master Data DMT345/346 → Tx D1+ Rx D1+ → Tx D0- Rx D0- ← Rx D1+ Tx D1+ ← Rx D0- Tx D0- VAISALA _______________________________________________________________________ 57... -
Page 58: Figure 35 2-Wire Rs-485 Bus
USER'S GUIDE____________________________________________________________________ Termination 120R Common Stub RS485 bus master Junction box Address NN Switch Term off Term off Common 2/4 wire off RS422 off Stub RS485-1 Junction box Twisted pair Address MM Switch Term off Term off Common 2/4 wire off RS422 off 120R Stub... -
Page 59: Lan Interface
RS-232 User Port is disabled. The LAN interface module must be installed at the factory (when ordering the transmitter), or by a Vaisala Service Center. Once installed, the module is automatically used by the transmitter. The physical connection to the network is made to the RJ45 connector on the LAN interface module, using a standard twisted pair Ethernet cable (10/100Base-T). -
Page 60: Wlan Interface
USER'S GUIDE____________________________________________________________________ 0709-003 Figure 36 LAN Interface Module The following numbers refer to Figure 36 above: Flat cable connector RJ45 connector with indicator LEDs for link and activity WLAN Interface The optional WLAN interface enables a wireless Ethernet connection (IEEE 802.11b) to the transmitter. The user can establish a virtual terminal session using a Telnet client program such as PuTTY or by using MODBUS TCP protocol. -
Page 61: Attaching The Wlan Antenna
Attaching the WLAN Antenna The LAN interface module must be installed at the factory (when ordering the transmitter), or by a Vaisala Service Center. Before taking the transmitter into use, you must attach the antenna of the WLAN interface into the RP-SMA connector on the transmitter cover. The location of the antenna is shown in Figure 81 on page 172. -
Page 62: Table 9 Observation Periods And Resolution
USER'S GUIDE____________________________________________________________________ Table 9 Observation Periods and Resolution Observation Period Period for Trend/Max/Min Calculations (Resolution) 3 hours 90 seconds 1 day 12 minutes 10 days 2 hours 2 months 12 hours 1 year 3 days 4 years 12 days The quantities that are logged are the same that have been selected for measurement using the display/keypad or the serial line. -
Page 63: Figure 38 Data Logger Module
The data logger module must be installed at the factory (when ordering the transmitter), or by a Vaisala Service Center. Once installed, the module is automatically used by the transmitter. When the module requires a new battery, the transmitter must be sent to Vaisala for maintenance. VAISALA _______________________________________________________________________ 63... -
Page 64: 8-Pin Connector
USER'S GUIDE____________________________________________________________________ 8-Pin Connector 1104-126 Figure 39 Pinout of the Optional 8-Pin Connector Table 10 Wiring of the Optional 8-Pin Connector Wire Serial Signal Analog Signal RS-232 (EIA-232) RS-485 (EIA-485) White Data out TX Brown (Serial GND) (Serial GND) Signal GND (for both channels) Green Ch 2 +... -
Page 65: Chapter 4 Operation
6 minutes due to the sensor self diagnostics procedure (Sensor Purge and AutoCal). The frozen output value will be the value the transmitter reached during the 10 seconds of measurement. After the self diagnostics procedure the outputs are operational again. VAISALA _______________________________________________________________________ 65... -
Page 66: Display/Keypad
USER'S GUIDE____________________________________________________________________ Display/Keypad Basic Display Display shows you the measurement values of the selected quantities in the selected units. You can select 1 ... 4 quantities for the numerical basic display (see section Changing Quantities and Units on page 98). 0605-036 Figure 40 Basic Display... -
Page 67: Graphic History
The right upper corner shows the time from the present to the chosen moment (without the logger module), or the date and time at the cursor position (when the logger module is installed). VAISALA _______________________________________________________________________ 67... -
Page 68: Figure 42 Graphical Display With Data Logger
USER'S GUIDE____________________________________________________________________ - If the optional data logger module is installed, you can scroll the cursor off the screen to move to a new point on the time axis. The new date will be displayed, and the cursor will be centered at the date where the cursor scrolled off the screen. -
Page 69: Menus And Navigation
Adjustment menu is displayed only when ADJ button (on the motherboard inside the transmitter) is pressed. 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. VAISALA _______________________________________________________________________ 69... -
Page 70: Changing The Language
USER'S GUIDE____________________________________________________________________ Changing the Language Go back to the basic display by keeping the right-hand button pressed for four seconds. Open the Main Menu by pressing any of the ▼▲◄► buttons. Scroll to the System menu option, and press the ► button. The menu option is indicated with the wrench symbol. -
Page 71: Display Contrast Setting
PIN code and select ►System, Menu PIN, press OFF button. In case you have forgotten the PIN code, open the transmitter cover and press the ADJ button once. Wait for a few seconds and the adjustment menu opens. Select Clear menu PIN, press CLEAR. VAISALA _______________________________________________________________________ 71... -
Page 72: Factory Settings
USER'S GUIDE____________________________________________________________________ NOTE You can also disable the keypad completely with serial command LOCK. See section Locking Menu/Keypad Using Serial Line on page 109. Factory Settings Use the display/keypad to restore the factory settings. This operation does not affect the adjustments. Only settings available in the menus are restored. -
Page 73: Configuring A Display Alarm
Enter the Main Menu by pressing an arrow key on the keypad. Use the arrow keys to select Display, followed by Alarms, to open the Display Alarms menu. The Display Alarms menu shows the currently enabled and disabled alarms. VAISALA _______________________________________________________________________ 73... -
Page 74: Figure 46 Display Alarms
USER'S GUIDE____________________________________________________________________ 0802-069 Figure 46 Display Alarms Use the arrow keys to select an alarm to configure. The alarm editing page opens. Changes you do on the alarm editing page will take effect immediately, NOTE and may cause an alarm to appear on the screen. To select a quantity for the alarm, press the Change button and select the quantity from the list. -
Page 75: Mi70 Link Program For Data Handling
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 170. VAISALA _______________________________________________________________________ 75... -
Page 76: Serial Line Communication
USER'S GUIDE____________________________________________________________________ Serial Line Communication Connect the serial interface by using either the user port or the service port. For permanent interfacing to host system, use the user port. You can change the serial settings and operate in RUN, STOP, POLL, and MODBUS modes. -
Page 77: User Port Connection
- In POLL or MODBUS mode, the transmitter does not output anything after power-up. For a description of the modes, see section SMODE on page 112. RS-232 User Port cannot be used when a communication module NOTE (LAN, WLAN, or RS-422/485 Interface) has been installed. VAISALA _______________________________________________________________________ 77... -
Page 78: Service Port Connection
Link detects the USB connection automatically. There is no reason to uninstall the driver for normal use. However, if you wish to remove the driver files and all Vaisala USB cable devices, you can do so by uninstalling the entry for Vaisala USB Instrument Driver from the Add or Remove Programs (Programs and Features in Windows Vista) in the Windows Control Panel. -
Page 79: Using The Service Port
LAN and WLAN interfaces; refer to section List of Serial Commands on page 90. For instructions on how to connect using a terminal program, see section Terminal Program Settings on page 87. VAISALA _______________________________________________________________________ 79... -
Page 80: Ip Configuration
USER'S GUIDE____________________________________________________________________ IP Configuration The IP settings of the LAN and WLAN interfaces are described in Table 15. The current settings can be viewed on the serial line or using the device information display; see section Device Information on page 105. Table 15 IP Settings for the LAN and WLAN Interfaces Parameter... -
Page 81: Using Display/Keypad
Move the cursor using the ◄► arrow buttons, and change the value under the cursor using the ▲▼ arrow buttons. Confirm the selection by pressing OK. After configuring the desired parameters, press EXIT to apply the changes and return to the basic display. VAISALA _______________________________________________________________________ 81... -
Page 82: Using Serial Line
USER'S GUIDE____________________________________________________________________ Using Serial Line Use the serial line command NET to view or set the network settings for the LAN and WLAN interfaces. You can also refresh the network information or disconnect all active connections. NET [REFRESH] [DISCONNECT] [DHCP WEB] [DHCP IP SUBNET GATEWAY WEB]<cr>... -
Page 83: Wireless Lan Configuration
The security type of the wireless network. The options are: OPEN OPEN/WEP WPA-PSK/TKIP WPA-PSK/CCMP All other choices except OPEN require a security key; see below. Security key The encryption key or passphrase that is used with an encrypted network. VAISALA _______________________________________________________________________ 83... -
Page 84: Using Display/Keypad
USER'S GUIDE____________________________________________________________________ Using Display/Keypad You can configure the Wireless LAN settings using the display/keypad as follows: Press any of the arrow buttons to open the Main Menu. Press the ► arrow button to select Interfaces. Press the ► arrow button to select Network settings. There will be a delay as the transmitter refreshes the network information. -
Page 85: Using Serial Line
Security type of the wireless network. The options are: OPEN OPEN/WEP WPA-PSK/TKIP WPA-PSK/CCMP Examples: >wlan ? Network SSID : WLAN-AP Type : OPEN > >wlan accesspoint wpa-psk/tkip Network SSID : accesspoint Type : WPA-PSK/TKIP WPA-PSK phrase ? thequickbrownfox Save changes (Y/N) ? y > VAISALA _______________________________________________________________________ 85... -
Page 86: Communication Protocol
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. -
Page 87: Terminal Program Settings
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. This opens the Vaisala USB Instrument Finder program that has been installed along with the USB drivers. -
Page 88: Figure 56 Opening A Serial Connection
USER'S GUIDE____________________________________________________________________ Check that the other serial/USB line settings are correct for your connection, and change if necessary. The default settings (shown in Figure 1) are used by the Service Port of the transmitter. 0810-070 Figure 56 Opening a Serial Connection Click the Open button to open the connection window and start using the serial line. -
Page 89: Opening A Telnet Session (Lan/Wlan)
Telnet session. If PuTTY is unable to connect the IP address you entered, it will show you an error message instead. If this happens, check the IP address and the connections, restart PuTTY, and try again. VAISALA _______________________________________________________________________ 89... -
Page 90: List Of Serial Commands
USER'S GUIDE____________________________________________________________________ List of Serial Commands All commands can be issued either in uppercase or lowercase. In the command examples, the keyboard input by the user is in bold type. The notation <cr> refers to pressing the carriage return (Enter) key on your computer keyboard. -
Page 91: Table 19 Data Recording Commands
Configure analog output quantities and scales ITEST Test analog outputs AMODE Display analog output mode AERR Change the error output ASCL Analog output scaling Table 24 Setting and Testing the Relays Command Description RSEL Configure relay settings RTEST Test relays VAISALA _______________________________________________________________________ 91... -
Page 92: Table 25 Other Commands
USER'S GUIDE____________________________________________________________________ Table 25 Other Commands Command Description Output the information about the device Output the information about the device in POLL-state CDATE Display the output date/set date when adjustment enabled CODE Display the order configuration code of the transmitter CTEXT Display the adjustment information text/set information text when adjustment enabled... -
Page 93: Getting Measurement Message From Serial Line
Use the S command to end the RUN mode. After this command all other commands can be used. You can also press the Esc button or reset the transmitter to stop the outputting. See command SMODE to change the default (power-up) operation mode. VAISALA _______________________________________________________________________ 93... -
Page 94: Outputting Reading Once
USER'S GUIDE____________________________________________________________________ Outputting Reading Once Use the SEND command to output the reading once in STOP mode. The output format depends on which parameters the transmitter can output. SEND<cr> Examples: >send Tdf= -5.8 'C H2O= 3715 ppmV x= 2.3 g/kg >send Tdf= -5.9 'C Td= -6.6 'C Tdfa= -5.9 'C Tda= -6.6 'C H2O= 3696 ppmV x=... -
Page 95: Communicating With A Transmitter In Poll Mode
Address of the transmitter (0 ... 255) CLOSE The CLOSE command switches the transmitter back to the POLL mode. Example: >OPEN 2 (opens the line to transmitter 2, other transmitters stay in POLL mode) >CRH (for example, calibration performed) >CLOSE (line closed) VAISALA _______________________________________________________________________ 95... -
Page 96: Formatting Serial Line Message
USER'S GUIDE____________________________________________________________________ Formatting Serial Line Message NOTE Instead of using the FTIME, FDATE and FST commands described in this section, you can use the FORM command with modifiers TIME, DATE, and STAT. See section FORM on page 99. FTIME and FDATE FTIME and FDATE commands will enable/disable output of time and date to the serial line. -
Page 97: Fst
= Sensor temperature (ºC) ... xxx = Sensor cooling where xxx = Sensor temperature (ºC) after purge ... xxx = AutoCal where xxx = Sensor temperature (ºC) ... xxx = Sensor warming where xxx = Sensor heat power VAISALA _______________________________________________________________________ 97... -
Page 98: General Settings
USER'S GUIDE____________________________________________________________________ General Settings Changing Quantities and Units To change quantities and units use serial commands or the optional display/keypad. See Table 5 on page 20 for available quantities. NOTE Only the quantities selected when ordering the device can be selected as an output quantity. -
Page 99: Using Serial Line
Pressure stability indicator, two characters [OK or " "] Modulus-256 checksum of message sent so far, ascii encoded hexadecimal notation Modulus-65536 checksum of message sent so far, ascii encoded hexadecimal notation NMEA xor-checksum of message sent so far, ascii encoded hexadecimal notation VAISALA _______________________________________________________________________ 99... -
Page 100: Unit
USER'S GUIDE____________________________________________________________________ Example: >form "SSR=" 4.2 ssr U5 #t "Ts=" ts U3 #r #n >send SSR= 22.51% 23.14'C > Command 'FORM /' will return the default output format. The default output format depends on the device configuration. >form / >send Tdf= 0.5 'C x= 4.0 g/kg... -
Page 101: Pressure Compensation Setting
O at 4°C. NOTE Pressure compensation is intended to be used in normal air only. When measuring in other gases, please contact Vaisala for further information. NOTE Fixed pressure compensation value of 1013.25 hPa is used when in adjustment mode. -
Page 102: Using Buttons On Motherboard
USER'S GUIDE____________________________________________________________________ Using Buttons on Motherboard Pressure set buttons (P and P ) can be used to set the process pressure. 0504-052 Figure 58 Pressure Set Buttons on Motherboard The following numbers refer to Figure 58 above: Pressure set button Pressure check button Press check button (P ) and a red led will flash the current pressure... -
Page 103: Date And Time
You can also change the date and time formats that are shown in the graphs. The selected formats are only used in graphical display, they do not change the formats that are used in the serial communication. Press EXIT to return to the basic display. VAISALA ______________________________________________________________________ 103... -
Page 104: Using Serial Line
USER'S GUIDE____________________________________________________________________ Using Serial Line To set time enter the TIME command. To set date enter the DATE command. TIME<cr> DATE<cr> 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. -
Page 105: Filt
Proceed in the information views by pressing the MORE button as many times as you get the desired information. You can browse through the information displays also with arrow buttons. Press OK to return to the basic display. VAISALA ______________________________________________________________________ 105... - Page 106 USER'S GUIDE____________________________________________________________________ Use the serial line command ? to check the current transmitter configuration. Command ?? is similar but can also be used if the transmitter is in POLL mode. Example: >? DMT340 / 5.10.0 Serial number : D1120014 Batch number : D0750009 Adjust.
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Page 107: Light
CLOSE CTEXT DATE DELETE DSEL DSEND ECHO ERRS FCRH FILT FORM HELP INTV ITEST LIGHT LOCK MODBUS MODS PLAY PRES PURGE RESET SCOM SDELAY SEND SERI SMODE SWARM SYSTEM TEST TIME UNDELETE UNIT VERS XHEAT XPRES > VAISALA ______________________________________________________________________ 107... -
Page 108: Errs
USER'S GUIDE____________________________________________________________________ ERRS Use the ERRS command to display transmitter error messages, see Table 32 on page 149. Example (no active errors): >errs No errors > Example (showing active error): >errs Error: E2 Humidity sensor open circuit. > VERS Use the VERS command to display software version information. Example: >vers DMT340 / 5.10... -
Page 109: Locking Menu/Keypad Using Serial Line
2 - Keypad completely disabled yyyy = 4-digit PIN code. The code can only be set when keypad locking level is 1. Examples: >lock 1 4444 Keyboard lock : 1 [4444] > >lock 1 Keyboard lock > VAISALA ______________________________________________________________________ 109... -
Page 110: Serial Output Settings
USER'S GUIDE____________________________________________________________________ Serial Output Settings The communication settings for the user port can be changed via the serial line or by using the optional display/keypad. The communication settings for the service port are fixed and not changeable. NOTE If a communication module (LAN, WLAN, or RS-422/RS-485 Interface) has been installed, the user port is not accessible. -
Page 111: Using Serial Line
The settings can be changed one parameter at a time or all parameters at once. Example (changing all parameters): >SERI 600 N 8 1 600 N 8 1 > Example (changing parity only): >SERI O 4800 O 7 1 VAISALA ______________________________________________________________________ 111... -
Page 112: Smode
USER'S GUIDE____________________________________________________________________ SMODE Use the SMODE command to set the user port start-up operating mode. SMODE [xxxx]<cr> where xxx = STOP, RUN, POLL, or MODBUS. Table 29 Selection of Output Modes Mode Measurement Output Available Commands STOP Only with the SEND command. All (default mode). Automatic output. -
Page 113: Intv
: 0 ? 10 >sdelay Serial delay : 10 ? ECHO Use the ECHO command to set the user port echo. The command either enables or disables echo of characters received. ECHO [x]<cr> where ON (enabled, default) or OFF (disabled) VAISALA ______________________________________________________________________ 113... -
Page 114: Data Recording
USER'S GUIDE____________________________________________________________________ NOTE When using the RS-485 Interface with a 2-wire connection, always disable echo. When using a RS-232, RS-422/485 4-wire connection, LAN, or WLAN, you can enable or disable it as you wish. Data Recording Data recording function is always on and collects data automatically into the memory of the device. -
Page 115: View Recorded Data
(12 h intervals) 2008-02-04 12:03:41 (3 d intervals) 2007-03-04 00:03:41 (90 s intervals) 2008-04-11 20:41:11 (12 min intervals) 2008-04-10 21:03:41 (2 h intervals) 2008-03-31 18:03:41 (12 h intervals) 2008-02-04 12:03:41 10 Tdf (3 d intervals) 2007-03-04 00:03:41 > VAISALA ______________________________________________________________________ 115... -
Page 116: Play
USER'S GUIDE____________________________________________________________________ PLAY Use the PLAY command to output the selected file to the serial line. If the data logger module is installed, you can specify an interval to be outputted. Data in the output is <TAB> delimited. This is compatible with most spreadsheet programs. -
Page 117: Deleting Recorded Files
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. VAISALA ______________________________________________________________________ 117... -
Page 118: Analog Output Settings
USER'S GUIDE____________________________________________________________________ Analog Output Settings The analog outputs are set in the factory according to the order form. In case you want to change the settings, follow these instructions. Changing Output Mode and Range Both output channels have their own dip switch module with 8 switches, see the position in Figure 2 on page 23 (dip switches for analog output settings). - Page 119 █ █ █ If you have customized the error output setting (AERR), check that the NOTE set error values are still valid after changing the output mode/range. See section Analog Output Fault Indication Setting on page 122. VAISALA ______________________________________________________________________ 119...
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Page 120: Analog Output Quantities
USER'S GUIDE____________________________________________________________________ Analog Output Quantities NOTE The relative humidity and temperature readings are not those of the process itself but the ones measured after the cooling process. Therefore, they should not be selected as output quantities. They are meant to be used in calibration or during installation. Use the display/keypad to change and scale the analog output quantities. -
Page 121: Analog Output Tests
Select one of the testing options Force 0 %/50%/100% of scale. Press TEST to confirm your selection. All outputs are tested simultaneously. The actual output value depends on the selected range. Press OK to stop testing. Press EXIT to return to the basic display. VAISALA ______________________________________________________________________ 121... -
Page 122: Itest
USER'S GUIDE____________________________________________________________________ ITEST Use the serial line to test the operation of the analog outputs. Use the ITEST [aa.aaa bb.bbb] command to force the analog outputs to entered values. The set values remain valid until you issue the command ITEST without parameters or reset the transmitter. -
Page 123: Aerr
"below" value, the relay is passive when the measured value is not between the setpoints. You can also set only one setpoint. See Figure 61 on page 124 for illustrative examples of the different measurement-based relay output modes. VAISALA ______________________________________________________________________ 123... -
Page 124: Figure 61 Measurement-Based Relay Output Modes
USER'S GUIDE____________________________________________________________________ 1102-007 Figure 61 Measurement-Based Relay Output Modes 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. -
Page 125: Hysteresis
FAULT STATUS Normal operation: relay active (C and NO outputs are closed) Not measuring state (error state or power off): relay released (C and NC outputs are closed) VAISALA ______________________________________________________________________ 125... -
Page 126: Figure 62 Fault/Online Status Relay Output Modes
USER'S GUIDE____________________________________________________________________ ONLINE STATUS Live measurement (data available): relay active (C and NO outputs are closed) No live data (for example: error state, chemical purge or adjustment mode): relay released (C and NC outputs are closed) See Figure 62 on page 126 for illustrative examples of the FAULT/ONLINE STATUS relay output modes. -
Page 127: Enabling/Disabling Relays
When you have two relay modules, the relays of the module connected to slot MODULE 1 are called “relay 1” and “relay 2” and relays connected to slot MODULE 2 are called “relay 3” and “relay 4”. VAISALA ______________________________________________________________________ 127... -
Page 128: Rsel
USER'S GUIDE____________________________________________________________________ 0706-029 Figure 63 Relay Availability Arrow in Figure 63 above shows where enabled relays are listed on the display. Activation state shown in black. Disabled relays are not shown. Use the display/keypad to set the relay outputs. Open the Main Menu by pressing any of the ▲▼◄► arrow buttons. - Page 129 Rel1 FAUL hyst : - Rel1 FAUL enabl: ON ? on Rel2 Ts above: 140.00 'C ? 140 Rel2 Ts below: 80.00 'C ? 80 Rel2 Ts hyst : 2.00 'C ? 2 Rel2 Ts enabl: ON ? on > VAISALA ______________________________________________________________________ 129...
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Page 130: Testing Operation Of Relays
USER'S GUIDE____________________________________________________________________ Testing Operation of Relays Testing activates relays even if they are disabled. Use the module push buttons to activate the relays. Press the REL 1 or REL 2 button to activate the corresponding relay. Use the display/keydpad to test the operation of relays. Open the Main Menu by pressing any of the ▲▼◄►... -
Page 131: Sensor Functions
In this mode, the calibration takes place automatically if the dewpoint or temperature changes significantly, typically more than 10 ºC. However, if there are no changes in the conditions, the AutoCal will take place repeatedly after one hour from the last AutoCal. VAISALA ______________________________________________________________________ 131... -
Page 132: Manual Autocal
USER'S GUIDE____________________________________________________________________ Manual AutoCal To ensure that AutoCal has taken place for obtaining the most accurate measurement in a very dry environment, you can perform Autocal manually before measuring as follows: Open the Main Menu by pressing any of the ▲▼◄► arrow buttons. -
Page 133: Sensor Purge
Figure 65 Sensor Purge Settings - Start the sensor purge manually by selecting Start purge now and pressing START. - Select Purge on power-up by using the arrow buttons. Press On/Off to turn the start-up purge on/off. VAISALA ______________________________________________________________________ 133... -
Page 134: Using Serial Line
USER'S GUIDE____________________________________________________________________ - Set the automatic purge interval by selecting Interval: ..., press SET. Set the purge interval and the unit (minutes/hours) by using the arrow buttons. The interval must be 10 min … 48 h. Press OK. - If you have the data logger module installed, you can also specify the Date and Time when the purge is performed next. - Page 135 Do not change the settings for duration, settling, temperature, temperature difference, or purge triggering unless instructed by Vaisala personnel. Type PUR and press ENTER to proceed. Skip unchanged values by pressing ENTER.
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Page 136: Sensor Warming
USER'S GUIDE____________________________________________________________________ Sensor Warming DMT345 and DMT346 contain a sensor warming function, that is, when humidity reaches a set limit (default: 80%RH), sensor warming operation is activated automatically. Sensor warming continues as long as the humidity is above that limit. When the warming starts, the sensor operation indicator is displayed on the optional display and relays configured as "online status"... -
Page 137: Chapter 5 Modbus
Design the system so that only one MODBUS TCP client accesses the transmitter. - MODBUS TCP can process reliably only one MODBUS transaction at a time. Reduce the polling rate of the client to avoid nested transactions. VAISALA ______________________________________________________________________ 137... -
Page 138: Taking Modbus Into Use
(optional) or a PC connected to the serial line. For example, you can connect to the service port using the USB service cable (Vaisala order code: 219685). The transmitter must be powered from a suitable power supply during configuration. -
Page 139: Enabling Serial Modbus
Connect the USB service cable between a computer and the service port of the transmitter. Start the Vaisala USB Instrument Finder program (which has been installed on the computer along with the USB service cable driver), and check the COM port that the cable is using. - Page 140 USER'S GUIDE____________________________________________________________________ Open a terminal program, and connect to the service port. The fixed settings serial line settings of the service port are 19200, 8, 1, N. Use the SMODE command to enable the MODBUS mode: > smode modbus Serial mode : MODBUS >...
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Page 141: Enabling Ethernet Modbus
Press the EXIT button to save the changes. Note that the device address setting is not relevant for MODBUS TCP. In the MODBUS mode, the transmitter will respond to all valid MODBUS messages with any “unit identifier” value. VAISALA ______________________________________________________________________ 141... -
Page 142: Using Serial Line
Connect the USB service cable between a computer and the service port of the transmitter. Start the Vaisala USB Instrument Finder program (which has been installed on the computer along with the USB service cable driver), and check the COM port that the cable is using. - Page 143 For a description of the available settings, see section Wireless LAN Configuration on page 83. The MODBUS configuration is now complete. Reset or power cycle the transmitter to enable the MODBUS mode, and proceed with the installation of the transmitter. VAISALA ______________________________________________________________________ 143...
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Page 144: Diagnostic Modbus Counters
USER'S GUIDE____________________________________________________________________ Diagnostic MODBUS Counters DMT345/346 has diagnostic counters that can be used to pinpoint MODBUS problems. The counters are always active when the MODBUS protocol is enabled. Viewing Counters Using Display/Keypad You can use the display/keypad option to view and clear the counters. Enter the Main Menu and navigate to System ►... -
Page 145: Disabling Modbus
Alternatively, you can enter the Main Menu using the display/keypad option, and change the mode from the Interfaces submenu. The other communication settings of the output interface (User Port, LAN interface, or WLAN interface) will remain as configured, but the MODBUS protocol will be disabled. VAISALA ______________________________________________________________________ 145... - Page 146 USER'S GUIDE____________________________________________________________________ This page intentionally left blank. 146 _________________________________________________________________ M210762EN-E...
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Page 147: Chapter 6 Maintenance
Changing the Cooling Set Filter Turn the filter counter-clockwise to remove it. Install a new filter on the cooling set and tighten it. New filters can be ordered from Vaisala, see Available Options and Accessories Table 43 on page 170. VAISALA ______________________________________________________________________ 147... -
Page 148: Error States
Press the INFO button to display the error message. You can also check the error message via the serial interface by using the command ERRS. In case of constant error, please contact Vaisala Technical Support. 148 _________________________________________________________________ M210762EN-E... -
Page 149: Table 32 Error Messages
Internal transmitter failure. Remove the transmitter and return the faulty unit to Vaisala Service. Internal system voltage out of range Check that the supply voltage is correct and the power supply can provide enough power for the instrument. VAISALA ______________________________________________________________________ 149... -
Page 150: Technical Support
USER'S GUIDE____________________________________________________________________ Technical Support For technical questions, contact the Vaisala technical support by e-mail at helpdesk@vaisala.com. Provide at least the following supporting information: - Name and model of the product in question - Serial number of the product - Name and location of the installation site... -
Page 151: Calibration And Adjustment
It is recommended that the device should be sent to a Vaisala Service Center for calibration and adjustment. For contact information of Vaisala Service Centers, see www.vaisala.com/services/servicecenters.html. -
Page 152: Opening And Closing Adjustment Mode
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. -
Page 153: Two-Point Relative Humidity Adjustment
NOTE Reference humidities must be ~0 %RH and 30 ... 75 %RH. A suitable product for the two point RH calibration is for example the Vaisala Humidity Calibrator HMK15. Press the ADJ button (see Figure 2 on page 23) to open the ADJUSTMENT MENU: measurement, press ►... -
Page 154: Using Serial Line
Using Serial Line NOTE Reference humidities must be ~0 %RH and 30 ... 75 %RH. A suitable product for the two point RH calibration is for example the Vaisala Humidity Calibrator HMK15. Connect the DMT345/346 to a PC. See section Serial Line Communication on page 76. - Page 155 (date and text) to the memory of the transmitter, see section Adjustment Information on page 152. Press the ADJ button on the motherboard to close the adjustment mode. Take the probe out of the reference conditions and replace the filter. VAISALA ______________________________________________________________________ 155...
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Page 156: One-Point Dewpoint Adjustment
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 T adjustment. Before proceeding with the Td/f adjustment you must perform the RH adjustment. -
Page 157: Figure 77 Completing T
This may take up to six (6) minutes. 0706-045 Figure 77 Completing T Adjustment The adjustment is now completed. Several AutoCals can be necessary after this adjustment has been NOTE performed until the transmitter reaches full accuracy. VAISALA ______________________________________________________________________ 157... -
Page 158: One-Point Dewpoint Adjustment Using Serial Line
USER'S GUIDE____________________________________________________________________ One-point Dewpoint Adjustment Using Serial Line Let the sensor stabilize for at least one (1) hour. Press the ADJ button on the motherboard to enable adjustments. Use the AØ1 command to perform the adjustment. AØ1<cr> Example: >a01 Tf : -34.25 'C Ref ? -33 Wait for Purge data...OK... -
Page 159: Adjusting Temperature
Note that the difference between the two temperature references must be at least 30 ºC. Press OK. Press YES to confirm the adjustment. Press OK to return to the adjustment menu Press EXIT to return to the basic display. VAISALA ______________________________________________________________________ 159... -
Page 160: Adjusting Temperature Using Serial Line
USER'S GUIDE____________________________________________________________________ Adjusting Temperature Using Serial Line Use the serial line command CT to adjust the temperature. Press the ADJ button on the motherboard to open the adjustment mode. Remove the probe filter and insert the probe into the reference temperature. -
Page 161: Adjusting Analog Outputs
Measure the second analog output value with a multimeter. Enter the measured value by using the arrow buttons. Press OK. Press OK to return to the adjustment menu. Press EXIT to close the adjustment and to return to the basic display. VAISALA ______________________________________________________________________ 161... -
Page 162: Adjusting Analog Outputs Using Serial Line
USER'S GUIDE____________________________________________________________________ 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 (mA) ? 2.046 (mA) ? 18.087 (mA) ? 2.036 (mA) ? 18.071... -
Page 163: Chapter 8 Technical Data
163. Response time 63% [90%] flow rate 1l/min and 1 bar pressure from dry to wet 5s [10 s] from wet to dry including auto- calibration 45s [5 min] 0605-043 Figure 78 Dewpoint Measurement Accuracy Graph DMT345 VAISALA ______________________________________________________________________ 163... -
Page 164: Table 35 Temperature Specifications Dmt345
±12 % of reading Table 38 Dewpoint Specifications DMT346 Property Value Sensor Vaisala DRYCAP®180S Measurement range -25 … +100 °C (-13 … +212 °F) T Accuracy ±2 °C (±3.6 °F) T See the accuracy graph in Figure 79 on page 165... -
Page 165: Figure 79 Dewpoint Measurement Accuracy Graph Dmt346
-40 … +80 °C (-40 … +176 °F) Pressure range for probes Slight pressure difference (~ 200 mbar) Measured gases Non-corrosive gases Electromagnetic compatibility EN61326-1: Electrical equipment for measurement, control, and laboratory use – EMC requirements – for use in industrial locations VAISALA ______________________________________________________________________ 165... -
Page 166: Table 41 Inputs And Outputs Specifications (Both Models)
USER'S GUIDE____________________________________________________________________ Table 41 Inputs and Outputs Specifications (Both Models) Property Value Operating voltage 10 ... 35 VDC, 24 VAC with optional power supply module 100 ... 240 VAC 50/60 Hz Default start-up time initial reading after power-up full operation after sensor Purge and Approximately 6 min AutoCal Power consumption at 20 °C... -
Page 167: Technical Specifications Of Optional Modules
0 ..1 V > 2000 ohms 0 ... 5 V and 0 ... 10 V > 10 000 ohms Storage temperature range -55 ... +80 °C (-67 ... +176 ºF) 3-pole screw terminal Max wire size 1.5 mm (AWG16) VAISALA ______________________________________________________________________ 167... -
Page 168: Relay Module
USER'S GUIDE____________________________________________________________________ Relay Module Operating temperature range -40 ... +60 ºC (-40 ... +140 ºF) Operating pressure range 500 ... 1300 mmHg Power consumption at 24 V max 30 mA Contacts SPDT (change over), for example, Contact arrangement Form C Imax 0.5 A 250 VAC Imax... -
Page 169: Data Logger Module
13.7 million points / parameter Accuracy of the clock better than ±2 min/year Battery lifetime at -40 ... +30 ºC (-40 ... +86 ºF) 7 years at +30 ... +60 ºC (+86 ... +140 ºF) 5 years VAISALA ______________________________________________________________________ 169... -
Page 170: Options And Accessories
USER'S GUIDE____________________________________________________________________ Options and Accessories Table 43 Options and Accessories Item Order Code MODULES Relay module RELAY-1 Analog Output Module AOUT-1 Isolated RS485 Module RS485-1 Power Supply Module POWER-1 Galvanic Isolation Module DCDC-1 FILTERS for DMT345 Sintered Filter AISI 316L HM47280SP for DMP246CS Sintered Filter AISI316L D=20mm... -
Page 171: Dimensions (Mm/Inch)
Chapter 8 ____________________________________________________________ Technical Data Dimensions (mm/inch) 0605-044 Figure 80 DMT345/346 Transmitter Body Dimensions VAISALA ______________________________________________________________________ 171... -
Page 172: Figure 81 Wlan Antenna Dimensions
USER'S GUIDE____________________________________________________________________ 0804-035 Figure 81 WLAN Antenna Dimensions 172 _________________________________________________________________ M210762EN-E... -
Page 173: Example Installation Of Dmt346
(max. 50 mm) can be welded on the mounting tube (for walls thicker than 175 mm, see Figure 23 on page 39). The cooling set is mounted in a vertical position. Tighten the screws properly in order to ensure a thermal contact. VAISALA ______________________________________________________________________ 173... -
Page 174: Figure 83 Insulation With Mineral Wool
USER'S GUIDE____________________________________________________________________ Unfasten the locking screws on the cooling bar so that you can push the probe into the bar. NOTE Push the probe deep enough: make sure that the marking hole meets the end of the bar. Lock the probe in place by tightening the locking screws on the bar. -
Page 175: Appendix Bcalculation Formulas
7.5000 237.3 50 ... 100 °C 5.9987 7.3313 229.1 100 ... 150 °C 5.8493 7.2756 225.0 150 ... 180 °C 6.2301 7.3033 230.0 1) Used for frostpoint calculation if the dewpoint is negative Mixing ratio: VAISALA ______________________________________________________________________ 175... - Page 176 USER'S GUIDE____________________________________________________________________ Absolute humidity: Enthalpy: . 1 ( 00189 The water vapor saturation pressure P is calculated by using two equations (5 and 6): where: temperature in K coefficients 0.4931358 -0.46094296 ×...
- Page 177 Parts per million by volume is calculated using: Symbols: dewpoint temperature (°C) water vapour pressure (hPa) water vapour saturation pressure (Pa) relative humidity (%) mixing ratio (g/kg) atmospheric pressure (hPa) absolute humidity (g/m temperature (K) enthalpy (kJ/kg) VAISALA ______________________________________________________________________ 177...
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Page 179: Appendix Cmodbus Reference
1 and some class 2 commands are also supported giving better compatibility and allowing more efficient communication when needed. MODBUS diagnostic and device identification data can be read out only with the function codes dedicated for those purposes (08 and 43 / 14). VAISALA ______________________________________________________________________ 179... -
Page 180: Register Map
USER'S GUIDE____________________________________________________________________ Register Map All data available via the MODBUS interface is grouped in six contiguous blocks of registers as described in Table 45 below. Table 45 DMT345/346 MODBUS Register Blocks Address Data Format Description 0001…0068 32-bit IEEE float Measurement data (read-only) 0257…0290 16-bit signed integer 0513…0517... -
Page 181: 16-Bit Integer Format
However, most of the measurement data values do not need any offset. A zero 16-bit value is returned for unavailable values. There is no way to distinguish missing values from actual zero values if the zero value is included in the valid measurement range of the parameter. VAISALA ______________________________________________________________________ 181... -
Page 182: Measurement Data (Read-Only)
USER'S GUIDE____________________________________________________________________ NOTE If your MODBUS master supports 32-bit floating point values, always use them instead of 16-bit integer registers. The use of 16-bit integer values is not recommended in critical applications because you cannot distinguish true zero values from zero values generated by measurement failures. -
Page 183: Status Registers (Read-Only)
0771...0772 (1026) instead of the permanent setting at register 0769…0770 (1025). Set the temporary value to zero to return to the default pressure setting. Non-metric units are not available on MODBUS. If they are needed, calculate the conversion outside the transmitter. VAISALA ______________________________________________________________________ 183... -
Page 184: Exception Status Outputs
USER'S GUIDE____________________________________________________________________ Configuration flags are used to select some basic options of the instrument and to manually start the sensor operations. Table 49 Configuration Flag Registers Name Address Description Standard filtering on/off 1281 1 = Filtering on Extended filtering on/off 1282 1 = Extended filtering on Automatic sensor purge on/off... -
Page 185: Diagnostic Sub-Functions
DMT345/346 supports the same diagnostic functions also on MODBUS TCP. NOTE Resetting, powering up the transmitter, or reselecting the MODBUS mode (by serial command or with the user interface) resets all MODBUS diagnostic counters and cancels any “Listen Only” mode. VAISALA ______________________________________________________________________ 185... -
Page 186: Device Identification Objects
MODBUS Application Protocol Specification V1.1b. Both stream access and individual access to the objects is supported. Table 52 MODBUS Device Identification Object Id Object Name Description 0x00 VendorName “Vaisala” 0x01 ProductCode Product code (e.g. “DMT340”) 0x02 MajorMinorVersion Software version (e.g. “5.10”) 0x03 VendorUrl “http://www.vaisala.com/”... - Page 188 *M210762EN*...