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EXT TRIG INPUT
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Calibration Interval
30dV(r)C+ACpeak)
30V (DC + AC peak)
To maintain instrument accuracy, perform the calibration
of the V-212[V-211] at least every 1000 hours of opera
tion, or every six months if used infrequently.
4. CONTROLS AND CONNECTORS
□
(1) Power supply and CRT
Operating voltage and fuse
This model can be operated from either a 100-volt, a
120-volt, a 220-volt or a 240-volt nominal line voltage
source.
The line Voltage Selector on the rear panel, converts the
instrument from one operating range to another. In addi
tion, this Selector changes the primary connections of the
power transformer to allow selection of one of four regu
lating ranges. The Selector also includes the line fuse. Use
the following procedure to convert this instrument be
tween nominal line voltage or regulating ranges.
1. Disconnect the instrument from the power source.
2. To convert from 100-volts nominal to 220-volts
nominal line voltage or vice versa, pull out the Volt
age Selector switch, and plug it back into the desired
holes. Change power-cord set to match the power-
source outlet.
3. Before applying power to the instrument, check the
voltage indicator tabs on the Selector.
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