Unihedron SQM-LU-DL, Operator'S Manual

Page: 70 / 101

8 Commands and responses
8.3.3 Dark calibration command
Dark Calibration is done at the factory along with Light calibration and calibration temperature recording.
Executing the dark calibration command “
zcalBx
” arms the dark calibration mode.
Dark calibration is performed in a completely dark environment. Check a reading to ensure that the period is correct
after entering the dark environment, it could take a few minutes to collect an accurate dark period. A dark period of only
a few seconds is too small.
The format of the response is shown in table 8.10:
Table 8.10: Dark calibration response
Column Example value Description
0
z
Calibration response is being returned.
1
B
Dark Calibration.
2
a
Armed.
3
L
L = Locked; Wait for unlock before calibrating after Arm command,
firmware upgrades are disabled.
U = Unlocked; Calibrate immediately after Arm command, Enable
firmware upgrade.
4-5 Carriage return (0x0d), Line feed (0x0a).
An example of the response is:
zBaL
012345
8.3.4 Disarm calibration command
The Disarm calibration command “
zcalDx
” disarms calibration modes from being triggered by the unlock mode.
The format of the response is shown in table 8.11:
Table 8.11: Disarm calibration response
Column Example value Description
0
z
Calibration response is being returned.
1
x
Indicates “All” calibration modes.
2
d
Disarmed.
3
L
L = Locked; Wait for unlock before calibrating after Arm command,
firmware upgrades are disabled.
U = Unlocked; Calibrate immediately after Arm command, Enable
firmware upgrade.
4-5 Carriage return (0x0d), Line feed (0x0a).
An example of the response is:
zxdL
012345
8.3.5 Manually set light calibration offset
Calibration is done at the factory, however, in the case where calibration values must be restored or set to something else,
this command allows a new calibration value to be placed into the meter.
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Unihedron SQM-LU-DL Operator’s Manual -
20220119