Vaisala HMT120 User Manual Page 5

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  • TROUBLESHOOTING
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_________________________________________________________________________________
VAISALA _________________________________________________________________________ 3
Field Checking and Adjustment Using a Calibrated
Reference Probe ............................................................ 55
One-Point Adjustment Using a Calibrator ...................... 55
Two-Point Adjustment Using a Calibrator ...................... 56
LiCl-NaCl Adjustment ..................................................... 57
Temperature Field Check and Adjustment by Using a
Calibrated Reference Probe .......................................... 58
Adjustment with HMI41 ....................................................... 59
Connections and Selecting the Calibrator Function ....... 60
Offset and Gain Adjustments ......................................... 61
HMI41 as a Reference Meter .................................... 62
HMI41 as a Terminal ................................................. 63
Troubleshooting ............................................................. 64
Analog Output Tests .............................................................. 65
CHAPTER 6
TROUBLESHOOTING ................................................................................. 67
Error Codes ............................................................................. 67
Solving Typical Problems...................................................... 68
Analog Output Error Notification .......................................... 69
Technical Support .................................................................. 69
CHAPTER 7
TECHNICAL DATA ...................................................................................... 71
Options and Accessories ...................................................... 73
Transmitter Dimensions ........................................................ 74
APPENDIX A
CALCULATION FORMULAS ...................................................................... 77
Dewpoint Temperature .......................................................... 78
Dew/frostpoint Temperature ................................................. 78
Mixing Ratio ............................................................................ 79
Absolute Humidity .................................................................. 79
Enthalpy .................................................................................. 79
Saturation Vapor Pressure .................................................... 80
Water Vapor Pressure ............................................................ 81
Accuracies of Calculated Variables ..................................... 81
Accuracy of Dewpoint Temperature °C ............................... 81
Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013
mbar) ................................................................................... 81
Accuracy of Wet Bulb Temperature °C ............................... 82
Accuracy of Absolute Humidity g/m³ ................................... 82
INDEX ........................................................................................................... 83
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