Vaisala HMP240 User Manual
Page 73
HMP240
M210300en
Appendix 1: Serial commands
71
For example, relative humidity is selected to be output on channel 1 and tem-
perature on channel 2; the temperature range is scaled to 0...100
°
C:
>ASEL RH T <cr>
Ch1
(RH)
lo 0.000 %RH
? <cr>
Ch1
(RH)
hi 100.000 %RH
? <cr>
Ch2
(T )
lo -40.000 'C
? 0 <cr>
Ch2
(T )
hi +160.000 'C
? 100 <cr>
When the ASEL command is given on its own, the transmitter outputs its cur-
rent settings:
>ASEL <cr>
Ch1
(RH)
lo
0.000 %RH
Ch1
(RH)
hi
100.000 %RH
Ch2
(T )
lo
-40.000 'C
Ch2
(T )
hi
+160.000 'C
The outputs and their scales can also be given directly with the ASEL com-
mand.
ASEL xxx yyy aaa.a bbb.b ccc.c ddd.d <cr>
xxx
=
channel 1's quantity
yyy
=
channel 2's quantity
aaa.a
=
lower limit of channel 1
bbb.b
=
upper limit of channel 1
ccc.c
=
lower limit of channel 2
ddd.d
=
upper limit of channel 2
ASCL
Scaling the analogue outputs
Disconnect the security lock jumper!
ASCL <cr>
Scales the outputs selected on channels 1 and 2.
For example, scaling relative humidity on the range of 0...100 %RH and tem-
perature -40...+160 °C:
>ASCL <cr>
Ch1
(RH)
lo
0.000 %RH ? <cr>
Ch1
(RH)
hi
100.000 %RH
? <cr>
Ch2
(T )
lo
0.000 'C ? -40 <cr>
Ch2
(T )
hi
100.000 'C
? 160 <cr>