Vaisala HMP260 - Manual (Page 4)

HMP260 SERIES
Operating Manual
HMP260-U017en-1.5
ii 1997-11-25
5.4. Serial commands ......................................................................................... 32
5.4.1.
Analogue output commands............................................................ 32
5.4.1.1. Setting the analogue outputs ....................................................... 32
5.4.1.2. Selecting and scaling the analogue output quantities .................. 33
5.4.1.3. Scaling the analogue outputs ...................................................... 33
5.4.2. Output via the serial bus ................................................................. 34
5.4.2.1. Starting the measurement output ................................................ 34
5.4.2.2. Stopping the measurement output............................................... 34
5.4.2.3. Outputting the reading once ........................................................ 34
5.4.2.4. Setting the output interval for the RUN mode .............................. 35
5.4.2.5. Serial bus settings....................................................................... 35
5.4.2.6. Selecting the output units ............................................................ 36
5.4.2.7. Setting the transmitter address ................................................... 36
5.4.2.8. Resetting the transmitter ............................................................. 36
5.4.4. Operating the transmitter via the serial bus ..................................... 36
5.4.4.1. Setting the serial interface........................................................... 36
5.4.4.2. OPEN & CLOSE ......................................................................... 37
6. CALIBRATION .......................................................................................................... 38
6.1. Humidity calibration .................................................................................... 38
6.1.1.
One point humidity calibration ......................................................... 39
6.1.1.1 Using serial commands ............................................................... 39
6.1.1.2 Using display/keypad commands ................................................ 39
6.1.1.3 Using LED commands................................................................. 40
6.1.2. Two point humidity calibration ......................................................... 40
6.1.2.1 Using serial commands ............................................................... 40
6.1.2.2 Using display/keypad commands ................................................ 41
6.1.2.3 Using LED commands................................................................. 41
6.1.3. Calibration procedure after sensor change...................................... 42
6.1.3.1 Using serial commands ............................................................... 42
6.1.3.2 Using display/keypad commands ................................................ 43
6.1.3.3 Using LED commands................................................................. 43
6.1.4. Humidity calibration table ................................................................ 44
6.2. Temperature calibration .............................................................................. 44
6.2.1
One point offset correction .............................................................. 45
6.2.2.1 Using serial commands ............................................................... 45
6.2.2.2 Using display/keypad commands ................................................ 45
6.2.2.3 Using LED commands................................................................. 46
6.2.2 Two point temperature calibration ................................................... 46
6.2.2.1 Using serial commands ............................................................... 46
6.2.2.2 Using display/keypad commands ................................................ 47
6.2.2.3 Using LED commands................................................................. 47
6.3. Calibration of analogue outputs ................................................................. 48
6.3.1
Using serial commands................................................................... 48
6.3.2 Using display/keypad commands .................................................... 48
6.3.3 Using LED commands .................................................................... 50
7. MAINTENANCE ........................................................................................................ 50
7.1. Reference measurements ............................................................................ 50
7.2. Self-diagnostics ........................................................................................... 50
7.3. Changing the HUMICAP® sensor and the filter .......................................... 51
7.4. Measurement of output currents using test points.................................... 51
7.5. Adjusting the contrast of the display.......................................................... 52