Vaisala HMP260 - Manual (Page 84)

HMP260 SERIES
HMP260-U017en-1.5 Appendix 1: Serial commands
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 outputs/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
>
MTIM Setting the measurement integration time
MTIM nnn <cr>
nnn = number of cycles measured (4...255)
By lengthening the measurement integration time any stray changes in the output can be
filtered out: the transmitter calculates the average of a number of measurement cycles
defined by the user. The command can be given in two ways: