User`s guide

_________________________________________________________________________________
VAISALA _________________________________________________________________________ 9
List of Tables
Table 1 Manual Revisions ..................................................................... 12
Table 2 Application, Location Classes .................................................. 15
Table 3 Quantities Measured by MMT330 ............................................ 19
Table 4 Optional Quantities Measured by MMT330.............................. 19
Table 5 MMT338 Probe Dimensions ..................................................... 42
Table 6 Connecting the Twisted Pair Wires to the Screw Terminals .... 58
Table 7 4-Wire (Switch 3: On) ............................................................... 59
Table 8 2-Wire (Switch 3: Off) ............................................................... 60
Table 9 Observation Periods and Resolution ........................................ 63
Table 10 Wiring of the Optional 8-Pin Connector .................................... 65
Table 11 Periods for Trend and Max/Min Calculations ........................... 68
Table 12 Graph Information Messages in Cursor Mode ......................... 69
Table 13 ALSEL Parameters ................................................................... 77
Table 14 Default Serial Communication Settings for the User Port ........ 80
Table 15 Communication Settings for the Service Port .......................... 82
Table 16 IP Settings for the LAN and WLAN Interfaces ......................... 83
Table 17 Wireless LAN Settings .............................................................. 86
Table 18 Measurement Commands ........................................................ 93
Table 19 Formatting Commands ............................................................. 93
Table 20 Data Recording Commands ..................................................... 94
Table 21 Calibration and Adjustment Commands ................................... 94
Table 22 Setting and Testing the Analog Outputs .................................. 94
Table 23 Setting and Testing the Relays ................................................ 94
Table 24 Other Commands ..................................................................... 95
Table 25 FORM Command Modifiers.................................................... 100
Table 26 Filtering Levels ....................................................................... 103
Table 27 Selection of Output Modes ..................................................... 110
Table 28 Relay State Examples ............................................................ 125
Table 29 Supported Modbus Variants ................................................... 131
Table 30 Error Messages ...................................................................... 146
Table 31 Indicator Led Functions .......................................................... 151
Table 32 Standard Probe Cable Lengths and Approximate
Transmitter Weight (in kg/lb) .................................................. 162
Table 33 Spare Parts and Accessories ................................................. 164
Table 34 Supported Function Codes..................................................... 171
Table 35 MMT330 Modbus Register Blocks ......................................... 172
Table 36 Measurement Data Registers................................................. 174
Table 37 Status Registers ..................................................................... 174
Table 38 Configuration Parameter Registers ........................................ 175
Table 39 Configuration Flag Registers .................................................. 175
Table 40 MMT330 Exception Status Outputs ....................................... 175
Table 41 MMT330 Modbus Diagnostics ................................................ 176
Table 42 MMT330 Modbus Device Identification .................................. 177
Table 43 MMT330 Modbus Exception Responses ............................... 177