Unihedron SQM-LU-DL, Operator'S Manual

Page: 71 / 101

8.3 Calibration commands
Executing the command “
zcal5########.##x
” manually sets the light calibration offset to the value specified in
“
########.##
”. The units are
magnitudes
arcsecond
2
.
The format of the response is shown in table: 8.12:
Table 8.12: Response for manual setting of light calibration offset
Column Example value Description
0
z
Calibration response is being returned.
2
5
Manual Set Light Calibration Offset
4-15
00000017.60m
Value that was set into EEPROM
16-17 Carriage return (0x0d), Line feed (0x0a).
An example of the response is:
z,5,00000017.60m
0123456789 1234567
8.3.6 Manually set light calibration temperature
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.
The “Light calibration temperature” is the temperature of the meter when the meter was calibrated for its “Light
calibration offset”.
Executing the command “
zcal6########.##x
” manually sets the light calibration temperature to the value specified
in “
########.##
”. The units are
º
C.
Note: The meter records the temperature in a raw value with different resolution, so the reply back may not be exactly
the same as the value sent.
The format of the response is shown in table: 8.13:
Table 8.13: Response for manually setting of light calibration temperature
Column Example value Description
0
z
Calibration response is being returned.
2
6
Manual Set Light Calibration Offset
4-9
019.0C
Value that was set into EEPROM
10-11 Carriage return (0x0d), Line feed (0x0a).
An example of the response is:
z,6,019.0C
0123456789 1
8.3.7 Manually set dark calibration time period
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.
The “Dark calibration time period” is the amount of time that has elapsed for the light sensor to make one cycle while
in complete darkness. The meter sets a time limit of 300 seconds on this value.
Executing the command “
zcal7#######.###x
” manually sets the light calibration offset to the value specified in
“
#######.###
”. The units are in seconds.
The format of the response is shown in table: 8.14:
Unihedron SQM-LU-DL Operator’s Manual -
20220119
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