Vaisala DMT152 - Calibrate Analog Output; Extend Analog Output Range

Chapter 5 ________________________________________________________ Serial Line Operation
VAISALA ________________________________________________________________________ 51
Calibrate Analog Output
Use the ACAL command to force the analog outputs to the following
values:
- Current output: 2 mA and 18 mA
- Voltage output: 10 % and 90 % of the range
After entering the ACAL command, use a calibrated current/voltage
meter to measure the output, and enter the values. Note that the
calibration is only valid for the currently selected analog output modes.
ACAL [channel]
where
Channel
=
Analog output channel: 1 or 2
Example:
acal 1
Ch1:
I1 ( mA ) ? 0.166
I2 ( mA ) ? 18.1
3.61058569E+02 1.40927863E+03
Extend Analog Output Range
Use the AOVER command to allow the analog output channels to
exceed their specified range by 10%. The scaling of the quantity remains
as before; the extra range is used for additional measurement range in the
wet end.
AOVER [ON/OFF]<cr>
The following example illustrates how the analog output is affected.
Channel 1 outputs T
d
with voltage output 0 … 5 V (-80 °C … -30 °C).
After giving the AOVER ON command, the range is 0 … 5.5 V (-80 °C
… -25 °C). Note that the -30 °C T
d
point is still at 5 V.
Example:
aover on
: ON