LI-COR LI-3100C, Instruction Manual

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Voltage selector operation and characteristics
The voltage selector is located in the power connector module ( Figure 2-1 on
page 2-2). The selector is inspected for proper voltage by sliding the clear plastic win-
dow to a position over the power connector. The visible number on the small prin-
ted circuit board located under the fuse indicates the selected voltage as follows:
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Either 100 or 120 V for 105-126 VAC operation.
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Either 220 or 240 V for 210-252 VAC operation.
Notice that the visible number is not the actual operating voltage. The instrument
will not function on 100 VAC.
The voltage selector is changed by sliding the circuit board outward from its mount
and repositioning it so that a different number is visible as appropriate to the avail-
able voltage.
The frequency usually changes from 60 to 50 Hz when the voltage is shifted from
120 to 240 VAC. This will change the instrument calibration approximately 0.5%.
An instrument calibration should be performed after changing the voltage.
At locations with fluctuating main current frequency, calibration should be checked
often during operation.
The proper fuse selection is:
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105-126 V, use 1 amp fuse.
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210-252 V, use 1/2 amp fuse.
Section 2. Preparations
2-5 Voltage selector operation and characteristics