Figure 2-2. Model 540B Thermal Transfer Standard and
Model A54-2 Voltage Plug-in Unit
b. The instrument utilizes a search circuit that gives a visual indication of
the input voltage as a percentage of the voltage range selected. If the instrument
was set up for the 1000-volt range and there was a 500-volt input, the visual
indication would be 50 percent; if there was a 250-volt input, the percent input
meter would read 25 percent.
c. Refer to Figure 2-3 throughout the following explanation of the Model 540B
front panel.
The POWER switch provides battery power to the instrument when all
the way clockwise to ON.
When in the BATTERY CHECK, REFERENCE, GALV, or SEARCH
positions the meter immediately above the POWER switch will indicate the condition
of each set of batteries.
Figure 2-3.
Model 540B and Model A54-2 controls, terminals, and indicators
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