Vaisala HMT330 User Manual
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VAISALA _________________________________________________________________________ 5
Using Display/Keypad (Optional) ...................................... 144
Using Serial Line ............................................................... 146
Diagnostic Modbus Counters ............................................. 147
Viewing Counters Using Display/Keypad .......................... 147
Viewing Counters Using Service Port ............................... 148
Disabling Modbus ................................................................ 148
Periodic Maintenance .......................................................... 149
Cleaning ............................................................................ 149
Changing the Probe Filter ................................................. 149
Changing the Sensor ........................................................... 150
Error States ....................................................................... 151
Technical Support ................................................................ 153
Product Returns ................................................................... 153
CALIBRATION AND ADJUSTMENT ......................................................... 155
Opening and Closing the Adjustment Mode ..................... 155
Relative Humidity Adjustment ............................................ 157
Using Push Buttons ........................................................... 157
Using Display/Keypad ....................................................... 158
Using Serial Line ............................................................... 159
Multipoint Adjustment Using Serial Line ........................... 161
MPC Command Syntax ............................................... 161
Example Multipoint Adjustment Procedure .................. 162
Relative Humidity Adjustment after Sensor Change ........ 164
Using Display/Keypad ....................................................... 164
Using Serial Line ............................................................... 164
FCRH ........................................................................... 164
Temperature Adjustment ..................................................... 165
Using Display/Keypad ....................................................... 165
Using Serial Line ............................................................... 165
Analog Output Adjustment.................................................. 167
Using Display/Keypad ....................................................... 167
Using Serial Line ............................................................... 167
ACAL ............................................................................ 167
Feeding Adjustment Information ........................................ 168
Using Display/Keypad ....................................................... 168
Using Serial Line ............................................................... 168
CTEXT ......................................................................... 168
CDATE ......................................................................... 168
Specifications ....................................................................... 169
Performance ...................................................................... 169
Relative Humidity ......................................................... 169
Temperature (+ Operating Pressure Ranges) ............. 170
Optional Temperature Probe ....................................... 170
Calculated Variables .................................................... 171