Vaisala HMP240 - Manual (Page 78)

HMP240
Appendix 1: Serial commands
M210300en
76
L Outputting linear correction coefficients
L
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
RH
offset : 0.000
RH gain : 1.000
Ts offset : 0.000
Ts gain : 1.000
Ta offset : 0.000
Ta gain : 1.000
where: Ts = temperature of the humidity sensor head
Ta = temperature of the temperature sensor head
LI Entering linear correction coefficients
Disconnect the security lock jumper!
LI
The LI command is one way of calibrating the transmitter.
>LI
RH
offset : 0.000 ? 0.1
RH gain : 1.000 ?
Ts offset : 0.000 ?
Ts gain : 1.000 ?
Ta offset : 0.000 ? -0.05
Ta gain : 1.000 ?
where: Ts = temperature of the humidity sensor head
Ta = temperature of the temperature sensor head
The factory settings are offset 0 and gain 1. The transmitter can be returned to
its factory calibration by giving these values .
NOTE
The temperature unit in offset correction is always de-
grees Centigrade, even if the transmitter is using non-
metric units (Fahrenheit) in its measurement output.