Vaisala PTU300 - Page 7

________________________________________________________________________________
VAISALA________________________________________________________________________ 5
PURGE ...................................................................142
PUR.........................................................................142
Setting Sensor Heating .....................................................144
Setting Humidity Sensor Heating using
Display/Keypad............................................................144
Using Serial Line..........................................................145
XHEAT....................................................................145
CHAPTER 5
MODBUS....................................................................................................147
Overview of MODBUS Protocol Support ...........................147
Taking MODBUS into Use ................................................148
Enabling Serial MODBUS ....................................................149
Using Display/Keypad (Optional)......................................149
Using Serial Line...............................................................149
Enabling Ethernet MODBUS ...............................................151
Using Display/Keypad (Optional)......................................151
Using Serial Line...............................................................152
Diagnostic MODBUS Counters...........................................154
Viewing Counters using Display/Keypad .......................... 154
Viewing Counters using Service Port................................154
Disabling MODBUS ..............................................................155
CHAPTER 6
MAINTENANCE .........................................................................................157
Periodic Maintenance ..........................................................157
Cleaning............................................................................157
Changing the Probe Filter .................................................157
Changing the Sensor...........................................................158
Error States.......................................................................159
Technical Support................................................................161
Product Returns ...................................................................161
CHAPTER 7
CALIBRATION AND ADJUSTMENT.........................................................163
Pressure................................................................................163
Opening and Closing the Adjustment Mode .....................164
Pressure Adjustment...........................................................165
One-Point Adjustment Using Display/Keypad...................165
One-Point Adjustment using Serial Line ...........................166
LCI...........................................................................166
LC............................................................................166
MPCI.......................................................................167
MPC ........................................................................168
Relative Humidity Adjustment ............................................169
Using Push Buttons...........................................................169
Using Display/Keypad.......................................................170
Using Serial Line...............................................................171
CRH .............................................................................171
Relative Humidity Adjustment After Sensor Change.......173