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CE318-T Photometer
User Operation Manual
Revision V4.10 October 2021
89
If this procedure does not solve the problem, it means that the sensor head cord is
probably damaged.
Please contact Cimel technical support for any damaged sensor head cord or if the
procedure is not solving the problem.
What to do when there is a
“InGaAs / silicon
discrepancy
”?
If the photometer is declared in AERONET network, “InGaAs / Silicon discrepancy”
warning flags may be emitted. They will be emitted on this website:
http://aeronet.gsfc.nasa.gov/cgi-bin/weekly_report_v2
If not declared, it is difficult to detect this discrepancy easily. A measure with the 1020
nm is done either on the silicon and the InGaAs channel. Algorithms are checking the
ratio in between the two measures and it should be constant.
The main cause that may lead to these discrepancies is:
•
One of the channels or both channels are obstructed by something (spider web,
insects…).
Procedure to follow:
•
Clean the collimator with dry air or a bottlebrush and make sure that nothing is
obstructing the channels.
If this procedure does not solve the problem, please contact CIMEL technical support.
What to do when there is a
“High dark current”?
If the photometer is declared in AERONET networ
k, “high dark current” warning flags
may be emitted. They will be emitted on this website:
http://aeronet.gsfc.nasa.gov/cgi-bin/weekly_report_v2
The dark current is regularly measured when a BLACK scenario is done on both
InGaAs and silicon channel with AUREOLE and SKY gain.
The dark current should always be low, and under a certain threshold.
The main cause that may lead to a high dark current:
•
An electronic component is damaged, defective or not correctly plugged.
Procedure to follow:
Содержание CE318-T
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