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Calibration Procedures
Section 5
CALIBRATION CHECK NOTES
PLEASE READ THESE NOTES BEFORE CONTINUING
The EXCO (Extinction Coefficient) values depend heavily on the location and
prevailing weather conditions and should only be carried out with the sensor:
1.
MOUNTED OUTSIDE AND ON A CLEAR DAY (VISIBILITY>10KM)
2.
POWERED FOR AT LEAST 1 HOUR
3.
NOT LOCATED NEAR A WALL OR OTHER OBSTRUCTION
4.
NOT RECEIVING OPTICAL REFLECTIONS (FROM SURFACES OR
CLOTHING)
Assembly of the calibration plaque to the sensor
The calibration reference plaque should first be attached to the arm. Confirm that the serial
number marked on the calibration reference plaque matches that on the label on the calibration
arm. If not, do NOT use this assembly as it may not give a true calibration. This assembly
should then be attached to the sensor as shown in Figure 5-1 - Assembly of Calibration
Reference Plaque.
Note: All commands should be terminated with <Carriage Return> and <Line Feed> <crlf>,
(see Paragraph 1.3).
The figure shows the calibration plaque assembly fixed to a VPF730, but the same
configuration is used for the VPF710 and VPF750.
Calibration
Reference Plaque
Calibration arm
Figure 5-1 - Assembly of Calibration Reference Plaque
(Example of calibration plaque in-situ on VPF730)
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Calibration Check