EKO INSTRUMENTS CO., LTD. - Pyranometer MS-60/60S - Instruction Manual Ver. 4
Pg. 23
6 - 3 . Tr o u b l e s h o o t i n g
Read the following in case of any sensor trouble. If any questions should remain, please contact EKO for
further technical support.
Table 6-3. Troubleshooting
Failure
Action
There is no output.
MS-60
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 in the specification
table.
MS-60S
Make sure that the sensor is properly connected, and type of power
supply and voltage values are appropriate. Also check the
communication settings [i.e. port, baud rate, converter ID] are
appropriate.
Output value is too low
The glass dome maybe soiled with rain or dust. Clean the glass dome
with a soft cloth.
The output may be decreased due to regular change. Recalibrate
periodically.
Negative
output
signal
during
night-time.
Pyranometers generate an output signal, which is proportional to the
temperature differences
between the sensor’s so-called hot and cold
junctions. Night-time offset can occur when the dome temperature will
cool down below the temperature of the detector.28587
Unusual noise
Check the shield connection and make sure it is connected securely.
Check to make sure the output cable is not swinging by wind; take
necessary measure by fixing or lining the cables through metal pipe.
Check for any objects which emit electromagnetic wave around the
instrument and or cable.
Attach 2 or more ferrite cores at the end of the cable.