Simpson 160 User Manual

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4.8 Measuring AC Voltages, 1000 Volt Range 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 at 1,000 VAC position (common with the 500 VAC
position).
2. Turn off power in the circuit being measured.
3. Connect the black test lead to the COM (–) jack, and the red test lead to
the 1,000 VAC jack.
4. Turn on power in the circuit being measured.
5. Read the voltage on the red arc marked AC using the 0-10 figures and
multiply the reading by 100.
4.9 Measuring Decibels
The decibel scale at the bottom of the dial is numbered from –20 to +10. To
measure decibels, proceed according to instructions for AC voltages, and
read the dB arc. The dB scale is calibrated for direct reading on the 2.5V
range. Scale factors for other ranges and dB reference at 0.006 watts into 500
ohms are given in the table below.
Range 1 mW @ 600 6 mW @ 500
2.5V direct –7
10 V +12 +5
50 V +26 +19
250 V +40 +33
4.10 Measuring Resistance
When resistances are measured, the internal batteries of the 160 furnish power
for the measuring circuit. Correction for battery deterioration over long peri-
ods of time is provided by means of the Zero Adjust control which is part of
the ohmmeter circuit.
1. Set the range switch at the desired resistance range position.
2. Connect the black test lead to the COM (–) jack, and the red test lead to
the + jack.
3. Connect the contact ends of the test leads together.
4. Observe the Instrument indication. Look for a reading of “0” on the OHMS
arc, which is at the top of the dial.
5. If the pointer does not read “0”, rotate the ZERO OHMS knob at the lower
left on the front panel until it does. If the pointer cannot be brought up to
the “0” mark, replace the appropriate battery.
NOTE: Disconnect power from any resistor or circuit to be measured before
measuring resistance. Do not apply any power until the measurements are
completed and test leads are disconnected.

Simpson 160 Specifications

General

Brand	Simpson
Model	160
Category	Measuring Instruments
Language	English