Vaisala HMT330 - Manual (Page 8)

User's Guide _______________________________________________________________________
6 ____________________________________________________________________ M210566EN-K
Accuracies of Calculated Variables ................................... 171
Accuracy of Dewpoint Temperature °C ........................ 171
Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013
mbar) ............................................................................ 171
Accuracy of Wet Bulb Temperature °C ........................ 172
Accuracy of Absolute Humidity g/m³ ............................ 172
Dewpoint Temperature (HMT337 Warmed Probe Option) 173
Operating Environment...................................................... 173
Inputs and Outputs ............................................................ 174
Mechanics ......................................................................... 175
Technical Specifications of Optional Modules ................... 176
Power Supply Module .................................................. 176
Analog Output Module .................................................. 176
Relay Module ............................................................... 176
RS-485 Module ............................................................ 177
LAN Interface Module ................................................... 177
WLAN Interface Module ............................................... 177
Data Logger Module ..................................................... 177
Spare Parts and Accessories .............................................. 178
Dimensions (mm/inch) ......................................................... 180
HMT331 ............................................................................. 182
HMT333 ............................................................................. 183
HMT334 ............................................................................. 183
HMT335 ............................................................................. 183
HMT337 ............................................................................. 184
HMT338 ............................................................................. 184
Temperature Probe ........................................................... 184
APPENDIX A
PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES ......... 185
Duct Installation Kits (for HMT333/337/335) ....................... 185
Duct Installation Kit for Temperature Probe (for HMT337)
................................................................................................ 186
Pressure Tight Swagelok Installation Kits (for HMT337) .. 187
RH Probe Installation ......................................................... 187
Temperature Probe Installation ......................................... 187
Examples of Vapor Tight Installations with Cable Gland . 188
RH-Probe Installations (for HMT333/337) ......................... 188
T- Probe Installations (HMT337) ....................................... 189
Example of Climate Chamber Installation ......................... 190
Example of Installation Through Roof ............................... 191
Ball Valve Installation Kit for HMT338 ................................ 192
Meteorological Installation Kit (for HMT337) ..................... 194
APPENDIX B
CALCULATION FORMULAS ..................................................................... 195
APPENDIX C
MODBUS REFERENCE ............................................................................. 199
Function Codes..................................................................... 199
Register Map ......................................................................... 200
Data Encoding ................................................................... 200
32-Bit Floating Point Format ......................................... 200