User's Guide ______________________________________________________________________
6 ___________________________________________________________________ M210566EN-J
Transmitter Weight.......................................................171
Technical Specifications of Optional Modules...................171
Power Supply Module ..................................................171
Analog Output Module..................................................171
Relay Module ...............................................................172
RS-485 Module ............................................................172
LAN Interface Module...................................................172
WLAN Interface Module ...............................................172
Data Logger Module.....................................................173
Options and Accessories ....................................................173
Dimensions (mm/inch).........................................................175
HMT331.............................................................................177
HMT333.............................................................................178
HMT334.............................................................................178
HMT335.............................................................................179
HMT337.............................................................................179
HMT338.............................................................................180
Temperature Probe ...........................................................180
APPENDIX A
PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES .........181
Duct Installation Kits (for HMT333/337/335).......................181
Duct Installation Kit for Temperature Probe
(for HMT337)..........................................................................182
Pressure Tight Swagelok Installation Kits (for HMT337)..183
RH Probe Installation.........................................................183
Temperature Probe Installation.........................................183
Examples of Vapor Tight Installations with Cable Gland.184
RH-Probe Installations (for HMT333/337).........................184
T- Probe Installations (HMT337) .......................................185
Example of Climate Chamber Installation.........................186
Example of Installation Through Roof...............................187
Ball Valve Installation Kit for HMT338................................188
Meteorological Installation Kit (for HMT337).....................190
APPENDIX B
CALCULATION FORMULAS.....................................................................191
APPENDIX C
MODBUS REFERENCE.............................................................................195
Function Codes.....................................................................195
Register Map.........................................................................196
Data Encoding...................................................................196
32-Bit Floating Point Format ........................................196
16-Bit Integer Format ...................................................197
Measurement Data (Read-Only) .......................................198
Status Registers (Read-Only) ...........................................199
Configuration Registers.....................................................199
Exception Status Outputs....................................................200
Diagnostic Sub-Functions...................................................201
Device Identification Objects ..............................................202
Exception Responses ..........................................................202
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