2.2 OPERATING PROCEDURE
2.2.1 Power Requirements
Before turning the power ON, make sure the instrument is set to the proper line voltage.
The Model 252 contains an internal slide switch to select the nominal line voltage
(see Figure 2-3). In its up position, the switch selects 100 to 125VAC, 50/60Hz operation. In
the down position it selects 200 to 250VAC, 50/60Hz operation.
WHEN CHANGING FROM 110VAC OPERATION TO 220VAC OPERATION (OR
IN OPPOSITE ORDER), BE SURE TO REPLACE THE REAR PANEL AC FUSE
WITH THE PROPER VALUE FOR THE LINE VOLTAGE SELECTED.
Figure 2-3. Line Voltage Switch
2-4
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