Biral SWS-100-LW: SWS-200-LW, User Manual

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Commands and Responses Section 3
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Sensor Commands
3.1.2 Command T? - Send Instrument Times Message
Response: aaaa,bbbb,ccccc,dddd
aaaa : Measurement interval for each operational data message (10 to 300
seconds)
(default = 60).
bbbb : Auxiliary measurement sample period - time between measurement of
peripheral signals during measurement interval.
(2 to 20 seconds) (default = 5).
ccccc : Not used.
dddd : Not used.
Table 3-3 Command T? Response
3.1.3 TEST Command – Start / Stop Test Mode
The test mode allows the user to force the data message to contain user-defined
data for visibility, present weather, window contamination and fault status for a
fixed period of time. The test mode is identified by the first character in the self-
test data section of the message set to a ‘T’.
To initiate the Test Command send the command “ CO<crlf> ”, followed by the
TEST command in the format:
TEST,tt,vv.vv,f,c,ww<crlf>
Where:
tt = Duration of test in minutes – range 00-60 (00 will stop the test)
vv.vv = Visibility will be in km – range 0.01 to maximum range, 7.5
f = Fault Indicator – Digit (range 0-1) indicating Other fault status
(0=No Fault, 1 = Fault)
c = Contamination Indicator – digit (range0-2) indicating
contamination, (0=None, 1=Warning, 2=fault)
ww = Weather Code - corresponds to WMO 4680 weather code (00-89)
Example:
CO
TEST, 02 , 07.50 ,0,0 – Outputs a visibility of 7.5km for 2 min (Clear
conditions)
TEST, 06 , 00.10 ,0,0 – Outputs a visibility of 0 . 1km for 6 min (Foggy
conditions)
TEST,00 – Stops the test and resets the sensor.
The test settings will be output in the data message.
The output of the sensor will be the standard sensor message with the visibility,
weather code, window contamination and fault status set to the required values.
The sensor will exit test mode and reset at the end of the test duration.