EKO INSTRUMENTS CO., LTD. - Pyranometers MS-802/802F/402/402F/602 - Instruction Manual Ver.13
Read the following in case of trouble with the instrument. If any questions should remain, please contact EKO
for further technical support.
Table 6-2. Troubleshooting
Make sure that the sensor cable is connected properly to the instrument.
To verify the connection, measure the impedance of output cable
(between the “+” and the “-” wires) and check if the measured
impedance is within the proper range as shown on the specification.
(See 7. Specifications)
The glass dome maybe soiled with rain or maybe contaminated. Clean
the glass dome with a soft cloth.
Output signal during night time is not
zero
Pyranometers generate an output signal which is proportional to the
temperature differences between the sensor’s so-called hot and cold
junctions; hence, small differences in temperatures between, for
example, the housing and the sensor generate in some cases a small
voltages. This is an instrument-intrinsic phenomenon, which has no
significance related to the quality of the instrument.
Silica gel has changed its color
(not applicable for MS-602)
Replace the silica gel. Remove the drying cartridge from the
pyranometer housing, open the cap at the inner end of the small tube
and replace the silica gel.
Unusual noise coming from the
ventilation unit (only applicable to
pyranometers with ventilation system)
Possibly some objects, such as leaves or trash, got stuck in the
ventilation unit. Stop the ventilation unit and check for any objects near
or in the ventilator. The noise of the ventilation unit may increase due
to aging. In such a case, contact EKO for replacement.
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