Vaisala HMP260 User Manual
Page 73
HMP260 SERIES
Appendix 1: Serial commands
HMP260-U017en-1.5
In one-point offset correction, the Ref2 prompt is acknowledged with <cr>:
CT <cr>
T : 0.80 Ref1 ?
0.0 <cr>
Press any key when ready ...
T : 75.50
Ref2 ?
<cr>
If the stabilization of the sensor to the temperature of the calibrator or the reference
needs to be monitored, the measurement output can be repeated by giving command
c<cr> at Ref1 and Ref2:
CT <cr>
T : 0.80 Ref1 ?
c <cr>
T : 0.40 Ref1 ?
0.00 <cr>
Press any key when ready ...
T : 56.20
Ref2 ?
55.0 <cr>
ACAL
Calibrating the analogue outputs
Disconnect the security lock jumper!
ACAL <cr>
Calibrates the outputs selected on channels 1 and 2. The output is measured and the
measured values (mA or V) entered as calibration coefficients.
For example, calibrating the outputs when 0...10 V signal has been selected on both
channels (set with AMODE command)
ACAL <cr>
Ch1
U1
(V ) ?
0.123 <cr>
Ch1
U2
(V ) ?
9.98 <cr>
Ch2
U1
(V ) ?
0.120 <cr>
Ch2
U2
(V ) ?
9.98 <cr>
L
Outputting linear correction coefficients
L <cr>
With the help of command L the user can check how the transmitter has been
adjusted after it has been calibrated at the factory.
L <cr>
RH
offset
: 0.000
RH
gain
: 1.000
T
offset
: 0.000
T
gain
: 1.000