Vaisala HMP240 User Manual
Page 5
HMP240 series
M210300en
User's guide
iii
7.5.2
With LED commands ...................................................................... 60
7.6
Measurement of output currents using test points.................................... 60
7.7
Adjusting the contrast of the display.......................................................... 61
8.
TECHNICAL DATA ................................................................................................... 62
8.1
Dewpoint temperature ................................................................................. 62
8.2
Temperature (with additional T sensor head)............................................. 63
8.3
Calculated variables .................................................................................... 63
8.3.1
Relative humidity (with additional T sensor head) ............................ 63
8.3.2
Accuracy of other calculated variables ............................................ 64
8.4
Outputs ......................................................................................................... 65
8.5
Electronics ................................................................................................... 65
8.6
Mechanics .................................................................................................... 66
8.7
Electromagnetic compatibility..................................................................... 67
SPARE PARTS AND ACCESSORIES............................................................................... 68
APPENDIX 1: SERIAL COMMANDS ................................................................................ 69
APPENDIX 2: INSTALLING AND USING THE RS 485/422 SERIAL PORT MODULE ...... 91
APPENDIX 3: INSTALLING AND USING THE DIGITAL CURRENT LOOP MODULE .... 102
APPENDIX 4: ERROR MESSAGES ................................................................................ 110
APPENDIX 5: CALCULATION FORMULAS ................................................................... 116
APPENDIX 6: HMP240 WIRING DIAGRAM .................................................................... 118
APPENDIX 7: RE-GAINING ............................................................................................ 119