Owner's manual

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VAISALA ________________________________________________________________________ 11
List of Tables
Table 1 Manual Revisions ..................................................................... 14
Table 2 Related Manuals ...................................................................... 14
Table 3 Output Quantities for DMT345 ................................................. 20
Table 4 Optional Output Quantities and for DMT345 ............................ 20
Table 5 Output Quantities for DMT346 ................................................. 20
Table 6 Connecting Twisted Pair Wires to Screw Terminals ............... 55
Table 7 4-Wire (Switch 3: On) ............................................................... 56
Table 8 2-Wire (Switch 3: Off) ............................................................... 57
Table 9 Observation Periods and Resolution ........................................ 60
Table 10 Wiring of the Optional 8-Pin Connector .................................... 62
Table 11 Periods for Trend and Max/Min Calculations ........................... 65
Table 12 Graph Information Messages ................................................... 66
Table 13 ALSEL Parameters ................................................................... 74
Table 14 Default Serial Communication Settings for User Port .............. 77
Table 15 Communication Settings for the Service Port .......................... 79
Table 16 IP Settings for the LAN and WLAN Interfaces ......................... 80
Table 17 Wireless LAN Settings .............................................................. 83
Table 18 Measurement Commands ........................................................ 90
Table 19 Formatting Commands ............................................................. 90
Table 20 Data Recording Commands ..................................................... 91
Table 21 Purge Commands .................................................................... 91
Table 22 Autocalibration Commands ...................................................... 91
Table 23 Calibration and Adjustment Commands ................................... 91
Table 24 Setting and Testing the Analog Outputs .................................. 91
Table 25 Setting and Testing the Relays ................................................ 91
Table 26 Other Commands ..................................................................... 92
Table 27 FORM Command Modifiers...................................................... 99
Table 28 Conversion Factors for Pressure Units .................................. 102
Table 29 Filtering Levels ....................................................................... 104
Table 30 Selection of Output Modes ..................................................... 112
Table 31 Relay State Examples ............................................................ 127
Table 32 Supported Modbus Variants ................................................... 137
Table 33 Error Messages ...................................................................... 147
Table 34 Indicator Led Functions .......................................................... 150
Table 35 Dewpoint Specifications DMT345 .......................................... 161
Table 36 Temperature Specifications DMT345 ..................................... 162
Table 37 Relative Humidity Specifications DMT345 ............................. 162
Table 38 Mixing Ratio Specifications DMT345 ..................................... 162
Table 39 Dewpoint Specifications DMT346 .......................................... 162
Table 40 Mixing Ratio Specifications DMT346 ..................................... 163
Table 41 Operating Environment Specifications (Both Models) ........... 163
Table 42 Inputs and Outputs Specifications (Both Models) .................. 164
Table 43 Mechanics Specifications (Both Models) ............................... 165
Table 44 Standard Probe Cable Lengths and Approximate Transmitter
Weight (in kg/lb) ..................................................................... 165
Table 45 Spare Parts and Accessories ................................................. 168
Table 46 Supported Function Codes..................................................... 177
Table 47 DMT345/346 Modbus Register Blocks ................................... 178
Table 48 Measurement Data Registers................................................. 180
Table 49 Status Registers ..................................................................... 181
Table 50 Configuration Parameter Registers ........................................ 181
Table 51 Configuration Flag Registers .................................................. 182
Table 52 Exception Status Outputs ....................................................... 182