Chapter 7 ___________________________________________________Calibration and Adjustment
VAISALA______________________________________________________________________ 163
Analog Output Adjustment
In the analog output calibration the analog output is forced to the
following values:
- Current output: 2 mA and 18 mA
- Voltage output: 10 % and 90 % of the range
Connect HMT330 to a calibrated current/voltage meter in order to
measure either current or voltage depending on the selected output type.
Using Display/Keypad
1. Press the ADJ button to open the ADJUSTMENT MENU.
2. Select Adjust analog outputs, press ► button.
3. Select the output to be adjusted Adjust analog output 1/2, press
START.
4. Measure the first analog output value with a multimeter. Give the
measured value by using the arrow buttons. Press OK.
5. Measure the second analog output value with a multimeter. Give
the measured value by using the arrow buttons. Press OK.
6. Press OK to return to the adjustment menu.
7. Press EXIT to close the adjustment mode and to return to the basic
display.
Using Serial Line
Enter the ACAL command and type the multimeter reading for each
case. Continue by pressing ENTER.
ACAL
Example (current outputs):
>acal
Ch1 I1 (mA) ? 2.046
Ch1 I2 (mA) ? 18.087
Ch2 I1 (mA) ? 2.036
Ch2 I2 (mA) ? 18.071
>
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