Vaisala DM70 - Manual (Page 5)

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Changing the Battery ..................................................... 57
Changing the Filter......................................................... 59
Changing the Fuses ....................................................... 60
CHAPTER 8
MEASURING MOISTURE IN SF
6
GAS-INSULATED EQUIPMENT ........... 61
Overview ................................................................................. 61
Operating Environment ....................................................... 62
Measuring............................................................................ 62
CHAPTER 9
CALIBRATION, ADJUSTMENT, AND MAINTENANCE............................. 65
Calibration............................................................................... 65
User Calibration and Adjustment ........................................ 65
Adjusting DM70.............................................................. 66
Adjusting DMT340 Series Transmitters Using DM70 as
Reference or Terminal ................................................... 66
Adjusting Dewpoint................................................................ 67
Two-Point Relative Humidity Adjustment............................ 67
Two-Point Relative Humidity Adjustment of DMT340
Series Transmitters Using DM70 ................................... 68
Adjusting Dewpoint T
d/f
........................................................ 70
T
d/f
Adjustment of DM70................................................. 70
T
d/f
Adjustment of DMT340 Series Transmitters using
DM70.............................................................................. 71
To Same as T
d/f I/II
...................................................... 72
1-Point Adjustment.................................................... 73
Adjusting Temperature .......................................................... 74
Temperature Adjustment of DM70 ...................................... 74
One-Point Adjustment.................................................... 74
Two-Point Adjustment .................................................... 75
Temperature Adjustment of DMT340 Series Using DM70 . 75
To Same as T
I/II
.............................................................. 76
1-Point Adjustment......................................................... 76
2-Point Adjustment......................................................... 77
Vaisala Service Centers......................................................... 78
CHAPTER 10
DE-COMMISSIONING, DISMANTLING, AND DISPOSAL ......................... 79
CHAPTER 11
TECHNICAL SPECIFICATIONS.................................................................. 81
Measured Variables................................................................ 81
Dewpoint Temperature........................................................ 81
Temperature................................................................... 83
PPM (ppm
v
or ppm
w
) ...................................................... 83
Absolute Humidity (DMP74A Probe Recommended) .... 84
Mixing Ratio (DMP74A Probe Recommended) ............. 84
Relative Humidity (DMP74A) ......................................... 84
Measurement Environment............................................ 84
Probe General................................................................ 85
VAISALA ________________________________________________________________________ 3