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6.0
CALIBRATION
6.1
DC VOLTAGE RANGES
1. Remove the front lens. Insert a blade screwdriver under the notch at the
bottom of the lens and gently pry it off.
2. Short the input signal connections and verify that the display reads zero.
3. Apply an input voltage equal to 95% of the high end of the range selected.
4. Locate the Span potentiometer (R23) in Figure 3-2. Adjust until the display
reads 1900 ±1 count.
6.2
AC VOLTAGE RANGES
1. Follow steps 1 and 2 from above.
2. Apply an input voltage equal to 110.0 V ac at 50 or 60 Hz on 200 V ac range
or 220 V ac at 50 or 60 Hz on 650 V ac range.
3. Locate the Span potentiometer (R23) in Figure 3-2. Adjust until the display
reads:
110.0 on 200 V ac range
220 on 650 V ac range
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