Ct temperature calibration, Temperature calibration – Vaisala HMP230 User Manual
Page 91
HMP230 SERIES
M210225en-B
Appendix 1: Serial commands
85
The command can also be divided into two commands, so the computer can be
used for other purposes while waiting for the sensor to stabilize to the higher
humidity.
>FCRH 1
RH
:
1.90
Ref1 ?
11.3
FCRH 2
RH
:
76.30
Ref2 ?
74.9
If the stabilization of the sensor to the humidity in the calibrator needs to be
monitored, the measurement output can be repeated by giving command c
at Ref1 and Ref2:
>FCRH
RH
:
12.00
Ref1 ?
c
RH
:
11.70
Ref1 ?
c
RH
:
11.50
Ref1 ?
11.3
Press any key when ready ...
RH
:
76.00
Ref2 ?
75.5
CT
Temperature calibration
Disconnect the security lock jumper!
CT
Using this command the transmitters can be calibrated against an accurate ref-
erence, such as a Pt 100 simulator. A two-point calibration is performed as
follows:
>CT
T
:
0.80
Ref1 ?
0.0
Press any key when ready ...
T
:
56.20
Ref2 ?
55.0
In one-point offset correction, the Ref2 prompt is acknowledged with
>CT
T
:
0.80
Ref1 ?
0.0
Press any key when ready ...
T
:
75.50
Ref2 ?
If the stabilization of the sensor to the temperature of the calibrator or the ref-
erence needs to be monitored, the measurement output can be repeated by giv-
ing command c
>CT
T
:
0.80
Ref1 ?
c
T
:
0.40
Ref1 ?
0.00
Press any key when ready ...
T
:
56.20
Ref2 ?
55.0