Michell Instruments Optidew User Manual page 46

APPENDIX B
Current outputs:
•
opl=X
•
oph=X
•
outdp
•
outrh
•
outM3
•
outKG
•
otl=X
•
oth=X
•
fourma
•
zeroma
•
out
Alarm:
•
alv=X
•
alp=X
NOTE: Some commands may not feature in all versions of the fi rmware.
Optidew Status String
The measured values and status information can also be read as one string by entering
the command
For continuous monitoring, send
soon as it has been updated by the instrument. To stop this output send
The data string is fi xed length of 35 characters and returns the following values:
• The fi rst character '
• Characters 2 to 5 represent the dew-point value multiplied by 10.
In this example the value is 0207, or 20.7°Cdp.
NOTE: Negative values for dp are displayed using the following format:
• Characters 6 to 9 represent the ambient temperature value multiplied
by 10.
In this example the value is 0211, or 21.1°C.
38
sets output1 minimum, where X = an integer between -200 & 200
sets output1 maximum, where X = an integer between -200 & 200
sets current output1 to indicate DEWPOINT
sets current output1 to indicate %RH
sets current output1 to indicate gm
sets current output1 to indicate gkg
sets output2 (temperature only) minimum,
where X = an integer between -200 & 200
sets output2 (temperature only) maximum,
where X = an integer between -200 & 200
sets current outputs to 4 to 20mA
sets current outputs to 0 to 20mA
returns current output setting
sets alarm setpoint where X = -200 to +212
sets alarm parameter 0=dp, 1=RH, 2=gm
4=Temp-DP, 5=Temp, 6=OFF
, which will output the information in the following format:
y<cr>
:020702110975012405892116160897201<cr>
x<cr>
' is the start character of the data string.
:
Dew point = (8000 – value) / 10
e.g. 7999 = -0.1°C/F or 7793 = -20.7°C/F etc ...
Optidew Series User's Manual
-3
-1
, 3=gkg
-3
which outputs the status string continuously as
97430 Issue 2, March 2017
,
-1
.
st<cr>