Digi-Sense 20250-60 Instruction Manual

THE STANDARD IN PRECISION MEASUREMENT

User Manual

Insulation Tester

Model 20250-60

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Introduction

The Digi-Sense Insulation Tester (Model 20250-60) is
versatile and easy to use. The instrument is a must-have
on your electrical tool belt. It safely measures insulation
resistance of electrical devices such as cables or motor
coils up to 4000 MΩ, as well as providing a means of
measuring AC/DC voltages and circuit continuity. Careful
use of this meter will provide years of reliable service.

Safety Precautions

•

Read the following safety information carefully before

attempting to operate or service the meter.

• To avoid damages to the instrument do not apply the

signals which exceed the maximum limits shown in the
technical specifications tables.

• Do not use the meter or test leads if they look damaged.

Use extreme caution when working around bare
conductors or bus bars.

• Accidental contact with the conductor could result in

electric shock.

• Use the meter only as specified in this manual; otherwise,

the protection provided by the meter may be impaired.

• Read the operating instructions before use and follow

all safety Information.

• Caution when working with voltages above 60 VDC or

30 VAC RMS. Such voltages pose a shock hazard.

• Before taking resistance measurements or testing

acoustic continuity, disconnect circuit from main power
supply and all loads from the circuit.

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Safety Symbols

Caution refer to this manual before using the
meter.

Dangerous voltages.

Meter is protected throughout by double insulation
or reinforced insulation.

CE Compliance with EN-61010-1
Note: When servicing, use only specified replacement

parts.

Unpacking

Check individual parts against the list of items below. If
anything is missing or damaged, please contact your
instrument supplier immediately.

1. Instrument

2. Test probes

3. Carrying case

4. Six AA batteries

5. User manual

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Meter Description

750V

1000V

Insulation Tester

400

125V

250V

500V

1000V

TEST

LOBAT

HV

(1)

POL1

(2)

(1)

OHM

BZ

(2)

(2)

POL2

4

(1)

BAR

1

8

5

1

2

3
4

6

7

8

9

10

CEM

DT-5505

5

1. Digital display

2. Data Hold button; Max./Min.

3. Lock button

4. Backlight button; Zero

5. Test button

6. Rotary function
switch

7. VΩ Jack

8. COM input jack

9. Pothook

10. Battery cover / flip stand

How It Works

How to Connect Test Leads

When the rotary function switch is on MΩ range, 400 Ω/BZ,
ACV, or DCV, connect the red test lead into the VΩ terminal
and the black lead into the COM terminal.

Test Leads Check

Set the range select switch to the 400 Ω range. With the tip
and alligator clip of the test leads connected, the indicator
should read 00.0 Ω. When the leads are not connected, the
display will read infinity indicated by “OL“. This will ensure
that test leads are in good working condition.

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Rotary Function Switch Positions

Turn the tester on by selecting any measurement setting.

HOLD Max/Min Button

Instant-pressing the HOLD button the first time will hold
the values at that instant in the primary display. Pressing
it a second time will return it to current reading. Pressing
and holding the button for 2 seconds will allow reading
the MAX value, and an additional instant-pressing will
switch it to display the MIN measured value. These can
be toggled by instant-pressing the button. To go back to
reading current values, press and hold the button again
for 2 seconds.

Lock Button
Used when testing insulation resistance. Press the

LOCK button and then push down the TEST button.

This will apply the high-voltage source and display the
test result. Pressing the TEST button again will shut off
the high-voltage and exit from the insulation resistance
testing.

Test Button

Used when testing insulation resistance. Pressing the
TEST button will apply the high-voltage source and
display the test result. Pressing the TEST button again
will shut off the high-voltage and exit from the insulation
resistance testing.

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