Kipp & Zonen CSD1, Instruction Manual

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The sensitivity of FD1 is adjusted at the factory at 50 microvolt per Watt
per square meter. This offers the opportunity to check the intensity of the
beam. At 500 Watt per square meter, the output voltage should be 25
millivolts.
3. Now take the test CSD1 that needs to be checked, and put it in the
position of the reference.
4. Take 4 readings of D1 of the CSD1 (J18-1 and J18-2) at 90 degree
intervals. The average is called FD1.
5. Put D2 of the test CSD1 in the position of D1. Take the readings of D2 of
the test CSD1 (J18-2 and J18-5) in 2 opposite directions. The average is
called FD2.
6. Put D3 of the test CSD1 in the position of D2. Take the readings of D3 of
the test CSD1 (J18-2 and J18-6) in 2 opposite directions. The average is
called FD3.
7. FD1 should equal REF1. If the deviation is more than 5% it is suggested
to replace the resistors at location 1, RES1 to adjust the sensitivity. The
value of the replacement resistors is a function of the resistors that are
present, and the ratio REF1/FD1. First the resistors at location 1 are
removed, and their total resistance is measured. After this the value of
the replacement resistors REP1 can be calculated according to the
following formula:
REP1 = total old resistance * ( REF1 / FD1 )
Note: T
he calibration resistance consists of two separate resistors.
The total value can be calculated by adding the two resistor values.
8. FD2 should equal 3.3 times REF1. If the deviation is more than 5% it is
suggested to replace the resistors at location 2, RES2 to adjust the
sensitivity. The value of the replacement resistors is a function of the
resistors that are present, and the ratio REF1/FD2.