Triplett 1101a - Manual (Page 13)

7.1 DC Voltage Measurement:
7:
MEASUREMENT PROCEDURES
WARNING!
If the magnitude of the voltage to be measured is unknown, always start
by setting the meter to the highest range, and then to lower ranges,
until a satisfactory reading is obtained.
Do not rotate the RANGE switch with the input applied to the meter.
If the input voltage is higher than 500VDC, or exceeds the limitations
of a CAT I 600V measurement, do not attempt to measure!
WARNING!
This meter will display voltages that exceed the maximum voltage that
can safely be applied to the meter. The fact that the meter displays the
voltages does not mean that it is safe to measure these voltages.
7.1.1 Connect the black test lead to the COM jack and the red test lead to
the V/Ω /mA / F jack.
7.1.2
Set the RANGE switch to a V position. If the magnitude of the
voltage is unknown, set the RANGE switch to the 500 position. If the
input voltage is higher than 500VDC, or exceeds the limitations of a
CAT I 600V measurement, do not attempt to measure!
7.1.3 With power disconnected from the circuit to be measured, connect the
test probes to the measurement points. Apply power to the circuit.
The LCD will display the DC voltage.
7.1.4
If the display indicates overrange, i.e. "1- - -", remove power from the
circuit, disconnect the test probes, and rotate the RANGE switch to
the next higher position. Reconnect the test probes, reapply power,
and read the voltage on the LCD display. If the RANGE switch is
already at the highest position (i.e. 500 VDC), the input voltage
exceeds the measurement capability of the meter and should not be
measured.
7.1.5
If the displayed value is less than "200" (decimal point not shown), a
more accurate reading may be obtained by setting the RANGE switch
to a lower range. Remove power from the circuit, disconnect the test
13