THE STANDARD IN PRECISION MEASUREMENT
User Manual
Receptacle Testers
Model 20250-61 (Circuit Tester)
Model 20250-62 (GFCI Tester)
20250-61 20250-62
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Introduction
The Digi-Sense Circuit Tester (Model 20250-61) and GFCI
Tester (Model 20250-62) are easy to use. These receptacle
testers detect nearly all common improper wiring conditions for 110 to 125 VAC outlets. These instruments comply
with UL 61010-01, CAT. II 125 V, and pollution 2. Careful use
of these meters will provide years of reliable service.
Safety Precautions
Note: For use on 110 and 125 VAC receptacles only.
• Always refer to this manual for correct use. Incorrect use
may result in damage to the device or its components.
• All appliances or equipment on the circuit to be tested
should be unplugged to help avoid erroneous reading.
• This tester is not a comprehensive diagnostic instrument,
but a simple instrument to detect nearly all probable
common improper wiring conditions.
• Refer all indicated problems to a qualied electrician.
• Tester will not indicate quality of ground.
• Tester will not detect 2 hot wires in a circuit.
• Tester will not detect a combination of defects.
• Tester will not indicate reversal of grounded and
grounded conductor.
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Safety Notes
• Measurement Category II is for measurements performed
on circuits directly connected to the low voltage installation.
• Testers conform to UL STD.61010-1.
• Testers are protected throughout by double insulation.
Unpacking
Check individual parts against the list of items below. If
anything is missing or damaged, please contact your
instrument supplier immediately.
1. Tester
2. User manual
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Circuit Tester Description (Model 20250-61)
1. Plug blades
2. Fault indicator table
3. Indicator lights
GFCI Tester Description (Model 20250-62)
1. Plug blades
2. Test button
3. Receptacle power
indicator
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4. Fault indicator table
5. Indicator lights
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Setup and Operation
Circuit Tester (Model 20250-61)
Note: For use on 110 to 125 VAC receptacles only.
1. Make sure the receptacle to be tested was installed in
accordance with the manufacturer’s specifications.
2. Check for correct wiring of the receptacle and all
remotely connected receptacles on the branch circuit by
plugging the tester into each receptacle.
3. Plug the tester in the receptacle you wish to test.
4. Compare the LED lights on the tester to the fault
indicator table.
Caution: The tester may not indicate properly when
plugged into a 2-wire (non-grounded) receptacle.
GFCI Tester (Model 20250-62)
Note: For use on 110 to 125 VAC receptacles only.
1. Make sure the GFCI receptacle to be tested was installed
in accordance with the manufacturer’s specifications.
2. Check for correct wiring of the GFCI receptacle and all
remotely connected receptacles on the branch circuit by
plugging the tester into each receptacle.
3. Press the test button on the GFCI receptacle and verify
it trips. If it does not trip, then do not use the tester, do
not use the receptacle, and consult an electrician.
4. If the GFCI receptacle does trip when the test button is
pressed, reset the receptacle and plug in the tester.
5. Compare the LED lights on the tester to the fault
indicator table.
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6. Press the test button on the tester for a mínimum of
6 seconds, the indicator lights on the tester should go
off when the GFCI receptacle trips.
7. If the tester does not trip the GFCI receptacle, either the
GFCI receptacle is defective or it is wired improperly,
consult an electrician.
Caution: When testing a GFCI receptacle installed in a
2-wire (non-grounded) system, the tester may indicate a
faulty GFCI receptacle. If this happens, press the test and
reset buttons on the GFCI receptacle to verify operation.
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Fault Indicator Table
Indicator Fault Reason for wiring fault
Open ground Ground contact not connected
Open neutral Neutral contact not connected
Open hot Hot contact not connected
Hot/ground
reversed
Hot/neutral
reversed
Correct wiring Receptacle is wired correctly
Hot and ground contacts
interchanged
Hot and neutral contacts
interchanged
Specifications
Voltage range 100 to 125 VAC
Altitude <2000 m
Operating conditions 32 to 104°F (0 to 40°C), <80% RH
Storage conditions 14 to 122°F (–10 to 50°C), <70% RH
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For Product and Ordering Information, Contact:
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Toll-Free: 1-800-323-4340
Phone: 1-847-549-7600
Fax: 1-847-247-2929
ColeParmer.com/Digi-Sense
1065DGMAN_20250-61, -62
Toll-Free: 1-800-358-5525
Phone: 1-847-327-2000
Fax: 1-847-327-2700
Davis.com/Digi-Sense
Manual Part No. 00101-96
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