Vaisala HMP230 - Manual (Page 4)

HMP230 SERIES
User's Guide
M210225en-B
ii
6.3.7.2. Setting the pressure for pressure compenstion of the HUMICAP

sensor
and for mixing ratio, wet bulb and enthalpy calculations ........................ 43
6.3.7.3. Setting the date ........................................................................................ 44
6.3.7.4. Setting the time ........................................................................................ 44
6.4. Serial commands ................................................................................................... 46
6.4.1.
Analogue output commands ..................................................................... 46
6.4.1.1. Setting the analogue outputs .................................................................... 46
6.4.1.2. Selecting and scaling the analogue output quantities ................................ 47
6.4.1.3. Scaling the analogue outputs.................................................................... 47
6.4.2. Output via the serial bus ........................................................................... 48
6.4.2.1. Starting the measurement output.............................................................. 48
6.4.2.2. Stopping the measurement output ............................................................ 48
6.4.2.3. Outputting the reading once...................................................................... 48
6.4.2.4. Setting the output interval for the RUN mode ............................................ 49
6.4.2.5. Serial bus settings .................................................................................... 49
6.4.2.6. Selecting the output units ......................................................................... 50
6.4.2.7. Setting the averaging time ........................................................................ 50
6.4.2.8. Setting the transmitter address ................................................................. 50
6.4.2.9. Setting the calculation mode..................................................................... 51
6.4.2.10. Resetting the transmitter .......................................................................... 51
6.4.3.
Operating the transmitter via the serial bus............................................... 51
6.4.3.1. Setting the serial interface ........................................................................ 51
6.4.3.2. OPEN & CLOSE ....................................................................................... 52
7. CALIBRATION ................................................................................................................... 53
7.1. Humidity calibration .............................................................................................. 53
7.1.1.
One point calibration procedure ................................................................ 54
7.1.1.1. With serial commands .............................................................................. 54
7.1.1.2. With display/keypad commands................................................................ 55
7.1.1.3. With LED commands ................................................................................ 55
7.1.2. Two point calibration procedure ................................................................ 55
7.1.2.1. With serial commands .............................................................................. 56
7.1.2.2. With display/keypad commands................................................................ 56
7.1.2.3. With LED commands ................................................................................ 57
7.1.3. Calibration procedure after sensor change ............................................... 57
7.1.3.1. With serial commands .............................................................................. 57
7.1.3.2. With display/keypad commands................................................................ 58
7.1.3.3. With LED commands ................................................................................ 58
7.1.4. Humidity calibration table.......................................................................... 59
7.2. Temperature calibration ........................................................................................ 60
7.2.1.
One point offset correction ....................................................................... 60
7.2.1.1. With serial commands .............................................................................. 60
7.2.1.2. With display/keypad commands................................................................ 61
7.2.1.3. With LED commands ................................................................................ 61
7.2.2. Two point temperature calibration............................................................. 62
7.2.2.1. With serial commands .............................................................................. 62
7.2.2.2. With display/keypad commands................................................................ 62
7.2.2.3. With LED commands ................................................................................ 63
7.3. Calibration of the analogue outputs ..................................................................... 63
7.3.1.
With serial commands .............................................................................. 63
7.3.2. With display/keypad commands................................................................ 64
7.3.3. With LED commands ................................................................................ 64
8. MAINTENANCE.................................................................................................................. 66
8.1. Reference measurements ..................................................................................... 66
8.2. Self-diagnostics..................................................................................................... 66
8.3. Changing the HUMICAP® sensor and the filter ................................................... 67