Vaisala HMP240 - Manual (Page 88)

HMP240
Appendix 1: Serial commands
M210300en
86
4. OTHERS
ITEST Testing the analogue outputs
ITEST <cr>
or
ITEST a b <cr>
a = current/voltage of channel 1
b = current/voltage of channel 2
The operation of the analogue outputs can be tested by forcing the outputs to
given values which can then be measured with a current/voltage meter from
the analogue outputs. The response to ITEST command gives six out-
puts/parameters. Only the first two are relevant; they show the channel current
or voltage in mA or V. The other four figures contain information for service
purposes only.
Examples:
• reading the channel outputs and parameters
>itest <cr>
1.9438 2.3483 1.00694 10.64634 1.97374 2.17665
>
• forcing outputs 0.5 V and 4 V to channels 1 and 2
>itest 0.5 4 <cr>
0.5000 4.0000 1.00694 10.62970 1.23336 3.01722
>
• releasing the forced control and reading the outputs
>itest <cr>
1.9427 2.3392 1.00731 10.62428 1.97157 2.16978
>
FILT Setting the averaging time
Disconnect the security lock jumper!
FILT nnnn <cr>
nnnn = averaging time (0 - 1024 seconds)
This command is used to set and inspect the averaging time during which the
individual measurement samples are integrated to get an averaged reading.