Vaisala HMT120 - Manual (Page 37)

Chapter 4 _______________________________________________________________ Service Port
VAISALA ________________________________________________________________________ 35
Restore Probe T Factory Calibration
Use the CTCLR to restore the probe T factory calibration.
CTCLR
Example:
>ctclr
OK
>
Calibrate Analog Output
Use the ACAL command to calibrate the analog current loop outputs.
ACAL
After you give this command, the CH1 analog output of the transmitter
is set to the low limit (4mA). Measure the output and enter the measured
value. After entering the low limit, you must measure and enter the high
limit (20mA) also. The same procedure is then repeated with CH2.
Calculated coefficients are printed after the measured values are given.
Example:
>acal
Ch1 I1 (mA) ? 5.60
Ch1 I2 (mA) ? 18.40
-1.40562890E+03 a0
1.41171900E+03 a1
OK
Ch2 I1 (mA) ? 5.60
Ch2 I2 (mA) ? 18.40
-1.40562890E+03 a0
1.41171900E+03 a1
OK
>
NOTE Question mark is displayed after certain stabilization time has expired.
Values should be entered only after question mark is displayed. Values
entered before question mark will be discarded.