Kipp & Zonen CSD1, Instruction Manual

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3. TROUBLE SHOOTING
The following contains a procedure for checking the instrument in case it
appears that it does not function as it should, i.e. the sunshine duration
signal fails or shows improbable results:
Check the instrument orientation. The tilt angle should be equal to the local
latitude, the top should point North in the northern hemisphere, South in the
southern hemisphere, both with an accuracy better than ± 10 degrees.
Check the instrument location. Are there obstructions that cast a shadow on
the instrument by blocking the direct sun in some part of the day?
Check the window, it should be clear and clean. If water is deposited on the
inside change the desiccant. If too much water is deposited, the instrument
should be dried inside.
If the orientation and window are satisfactory, check the power supply. The
voltage input between the connections J15 and J16/J17 should be minimum
9 VDC and maximum 15 VDC.
Check the input current. It should be between 0.2 mA and 2 mA.
If the above tests are passed, the CSD1 should be transferred to an indoor
facility. Here the instrument can be opened by unscrewing the bottom plate,
and inspected. Any damage should be reported to Kipp & Zonen, who will
suggest appropriate action.
If inspection does not show any clear signs of damage, check the response
of each individual detector to light with a power supply connected. The
response of detector D1 to an ordinary desk-type lamp can be measured at
connector J18, across pins 1 and 2; for D2 across pins 5 and 2; for D3
across pins 6 and 2 (see figure 4.1).