Vaisala HMP240 - Manual (Page 4)

HMP240 series
User's guide
M210300en
ii
5.4.2 Output via the serial bus ................................................................. 36
5.4.2.1 Starting the measurement output.................................................... 36
5.4.2.2 Stopping the measurement output .................................................. 36
5.4.2.3 Outputting the reading once............................................................ 37
5.4.2.4 Setting the output interval for the RUN mode .................................. 37
5.4.2.5 Serial bus settings .......................................................................... 37
5.4.2.6 Selecting the output units ............................................................... 38
5.4.2.7 Setting the averaging time .............................................................. 38
5.4.2.8 Setting the transmitter address ....................................................... 39
5.4.2.9 Setting the calculation mode........................................................... 39
5.4.2.10 Resetting the transmitter ................................................................ 39
5.4.3
Operating the transmitter via the serial bus..................................... 40
5.4.3.1 Setting the serial interface .............................................................. 40
5.4.3.2 OPEN & CLOSE ............................................................................. 41
6. CALIBRATION ......................................................................................................... 42
6.1 Humidity calibration .................................................................................... 42
6.1.1
One point humidity calibration......................................................... 43
6.1.1.1 With serial commands .................................................................... 44
6.1.1.2 With display / keypad commands................................................... 44
6.1.1.3 With LED commands ...................................................................... 45
6.1.2 Two point humidity calibration......................................................... 45
6.1.2.1 With serial commands .................................................................... 45
6.1.2.2 With display / keypad commands.................................................... 46
6.1.2.3 With LED commands ...................................................................... 47
6.1.3 Humidity calibration procedure after sensor change........................ 48
6.1.3.1 With serial commands .................................................................... 48
6.1.3.2 With display / keypad commands.................................................... 48
6.1.3.3 With LED commands ...................................................................... 49
6.1.4 Humidity calibration table................................................................ 50
6.2 Temperature calibration .............................................................................. 50
6.2.1
One point offset calibration ............................................................. 51
6.2.1.1 With serial commands .................................................................... 51
6.2.1.2 With display / keypad commands.................................................... 51
6.2.1.3 With LED commands ...................................................................... 51
6.2.2 Two point temperature calibration................................................... 52
6.2.2.1 With serial commands .................................................................... 52
6.2.2.2 With display / keypad commands.................................................... 53
6.2.2.3 With LED commands ...................................................................... 53
6.3 Calibration of analogue outputs ................................................................. 54
6.3.1
With serial commands .................................................................... 54
6.3.2 With display / keypad commands.................................................... 54
6.3.3 With LED commands ...................................................................... 55
7. MAINTENANCE........................................................................................................ 56
7.1 Reference measurements ........................................................................... 56
7.2 Self-diagnostics........................................................................................... 56
7.3 Replacing the composite sensor ................................................................ 57
7.4 Temperature channel (additional) adjustment with Pt 100 simulators ..... 57
7.4.1
With serial commands .................................................................... 58
7.4.2 With display commands.................................................................. 58
7.4.3 With LED commands ...................................................................... 58
7.5 Temperature channel adjustment with Pt 100 simulators (composite sensor)
...................................................................................................................... 59
7.5.1.1 With serial commands .................................................................... 60
7.5.1.2 With display commands.................................................................. 60