Simpson 160 User Manual

12
4.6 Meas ur ing DC Vol ta g es , 1 , 000 Vol t Ra ng e Only
Use extreme care when working in high voltage circuits. Even though the
Instrument and test leads are well insulated for this voltage, do not handle
when power is on in the circuit.
1. Set the range switch to the 1,000 VDC position (common with the 500
VDC position).
2. Connect the black test lead to the COM (–) jack and the red test lead to
the 1,000 VDC jack.
3. Set the polarity switch to the + DC position.
4. Connect the black test lead to the negative (–) side of the circuit and the
red test lead to the positive (+) side.
5. If the pointer deflects to the left side of zero, the actual circuit polarity is
the reverse of that anticipated. (In this case see Paragraph 4.5, step d.)
6. Read the voltage, using the 0-10 scale on the black arc marked DC and
multiply the reading by 100.
4.7 Measuring AC Voltages, 2.5 Through 500 Volt
Ra ng e
The 160 rectifier circuit responds to the full wave rectified average value of
the AC voltage being applied. The Instrument dial, however, is calibrated in
terms of RMS voltage, which will be correct for all sinusoidal waveforms.
NOTE : Since the 160 will respond to DC voltage when set on any AC volt
range an external blocking capacitor must be employed where measurements
of AC superimposed on DC are encountered.
1. Connect the black test lead to the COM – jack and the red test leads to
the + jack.
2. Set the range switch for any of the five VAC range positions desired. These
are marked 2.5 VAC, 10 VAC, 50 VAC, 250 VAC, and 500 VAC. When in
doubt as to which range to use, always start with the highest voltage
range as a protection to the Instrument.
3. Turn the power on in the circuit to be tested. Read the voltage on the red
arc marked AC.
0-2 . 5 VAC ra ng e : Read the value directly on the special arc marked
2.5 VAC.
10 and 50 VAC ranges: Read the red arc marked AC, and use the corre-
sponding black numbers immediately below the arc.
250 VAC range: Read the red arc marked AC using the 0-2.5 figures
and multiply the reading by 100.
500 VAC range: Read the red arc marked AC using the 0-50 figures
and multiply the reading by 10. If the voltage is within
a lower range, the switch may be set for the lower
range to obtain a more accurate reading.

Simpson 160 Specifications

General

Brand	Simpson
Model	160
Category	Measuring Instruments
Language	English