HP 740B Operating And Service Manual page 13

Section ill
Model740B
INDEX NO.
1
2
3
4
5
6
NAME
FUNCTION Rotary Switch
RANG E Rotary Switch
Digital Readout Tubes
Decimal Point Indicators
VOLTS Meter
ZERO Adjustment
FUNCTION
Selects one of the three basic modes of operation:
STD - DC Standard
t.VM - DC Differential Voltmeter
VM - DC Voltmeter
Selects one of seven full scale ranges in the Dif-
ferential Voltmeter and DC Voltmeter modes of
operation; selects one of four output ranges in
the DC Standard mode of operation.
Display the first five digits in the Differential Volt-
meter and DC Standard modes of operation.
Light to indicate position of decimal point in first
five significant digits in DC Standard and Dif-
ferential Voltmeter modes of operation.
Indicates sixth digit of input voltage in Differential
Voltmeter mode of operation; indicates sixth digit
of output voltage in DC Standard mode of operation;
indicates value of input voltage in DC Voltmeter
mode of operation.
Adjusts meter to 0 with input shorted in Differential
Voltmeter and DC Voltmeter modes of operation;
used to zero the output or null out external offset
voltages in DC Standard mode of operation.
3-2
Figure 3-3. Front and Rear Panel Controls, Indicators and Connectors
01794-1