UNI-T UT511 Operating Manual

Model UT511

OPERATING MANUAL

TITLE PAGE

Model UT511: OPERATING MANUAL

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Introduction
Unpacking the Meter
Safety Information
International Electrical Symbols
Battery Saver (Sleep Mode)
Battery Indication
The Meter Structure
Display
Key Functions

Measurement Operation

A.Measuring Voltages
B.Measuring Insulation Resistance
a) Continuous Measurement
b) Timed Measurement
c) Polarization Index (PI) Measurement
d) Compare Function
C. Low Resistance Measurement

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Model UT511: OPERATING MANUAL

TITLE PAGE

The Use of Power Adaptor

Maintenance

A. General Service
B. Replacing the Battery

Specifications

Safety and Compliances
Physical Specifications
General Specifications
Feature Summary
Detailed Accuracy Specifications
A. Voltage Measurement
B. Insulation Resistance Measurement
C. Low Resistance Measurement

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Model UT511: OPERATING MANUAL

Table Title Page

1. Unpacking Inspection

2. International Electrical Symbols

3. Battery Indication

4. Meter Front Description

5. Meter Side Description

6. Display Description

7. Key Description

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Model UT511: OPERATING MANUAL

Figure Title Page

1. The Meter Front Structure

2. The Meter Side Structure

3. The Display

4. Voltage Measurement

5. Insulation Resistance Measurement

6. Low Resistance Measurement

7. The Use of Power Adaptor

8. Battery Replacement

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Model UT511: OPERATING MANUAL

Introduction

Uni-Trend Model UT511 insulation resistance tester
(hereafter, “the Meter”) is a handheld instrument
designed primarily to make resistance/ insulation
resistance measurement.

Unpacking the Meter

The Meter includes the following items:

Table 1. Unpacking Inspection

Item

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2
3

4
5
6

Description

English Operating Manual
One plug test lead to one alligator
Two plugs test lead to one
alligator

1.5V Battery (R14 or LR14)
Tool Box
Power adaptor (optionally,
available at extra cost)

Qty

1 piece
2 pieces
1 piece

8 pieces
1 piece
1 piece

In the event you find any missing or damage, please
contact your dealer immediately.

Safety Information

This Meter complies with the standards IEC61010 safety
measurement requirement: in pollution degree 2,
overvoltage category (CAT. III 600V, CAT.II 1000V) and
double insulation.

CAT II: Local level, appliance, PORTABLE EQUIPMENT
etc., with smaller transient voltage overvoltages than
CAT. III
CAT III: Distribution level, fixed installation, with smaller
transient overvoltages than CAT. IV

Use the Meter only as specified in this operating manual,
otherwise the protection provided by the Meter may be
impaired.

Danger identifies conditions and actions that pose
hazard(s) to the user.

Warning identifies avoiding electric shock.
Caution identifies conditions and actions that may

damage the Meter and carrying out accurate
measurement.

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Model UT511: OPERATING MANUAL

International electrical symbols used on the Meter and
in this Operating Manual are explained on page 4~5.

Danger

Use of instrument in a manual not specifed by
the manufactuer may impair safety features/
protection provided by the equipment. Read the
following safety information carefully before using
or servicing the instrument.

Do not apply more than 1000VDC or 750V AC.
Do not use the Meter around explosive gas,
vapor or dust.
Do not use the Meter in a wet environment.
When using the test leads, keep your figures
away from the lead contacts. Keep your
figures behind the finger guards on the leads.
Do not use the Meter with any parts or cover
removed.
When carrying out insulation measurement,
do not contact the circuit under test.

Warning

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Do not use the Meter if it is damaged or metal
part is exposed. Look for cracks or missing
plastic.
Be careful when working above 30V rms, 42V
ac rms and 60V DC. Such voltages pose a
shock hazard.
Discharge all loading of circuit under test after
measuring high voltage.
Do not change battery when the Meter is in
wet environment.
Place test leads in proper input terminals.
Make sure all the test leads are firmly
connected to the Meter’s input terminals.
Make sure the Meter is turned off when
opening the battery compartment.

Caution

l When performing resistance tests, remove all

power from the circuit to be measured and
discharge all the power.

Risk of electric shock
Equipment protected by double or
reinforced insulation.
DC Measurement
AC Measurement
Grounding
See Manual
Empty of Built-In Battery
Conforms to Standards of European Union

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Model UT511: OPERATING MANUAL

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When servicing the Meter, use only the same
model number or identical electrical
specifications of test leads and power adaptor.
Do not use the Meter if the battery indicator
( ) shows a battery empty condition. Take
the battery out from the Meter if it is not used
for a long time.
Do not use or store the Meter in an
environment of high temperature, humidity,
explosive, inflammable and strong magnetic
field. The performance of the Meter may
deteriorate after dampened.
Soft cloth and mild detergent should be used
to clean the surface of the Meter when
servicing. No abrasive and solvent should be
used to prevent the surface of the Meter from
corrosion, damage and accident.
Dry the Meter before storing if it is wet.

International Electrical Symbols

International symbols on the Meter and in this manual
are explained in Table 2.

Table 2. International Electrical Symbols

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Model UT511: OPERATING MANUAL

Battery Saver (Sleep Mode)

The Meter enters the Sleep Mode and blanks the display
if there is no button press for 15 minutes. This is done
to conserve battery power. The Meter comes out of
Sleep Mode when ON/OFF button is pressed two times.

The 15 minutes timer is disabled during any insulation
resistance measurement. The time period starts
immediately following any measurement.

Battery Indication

There is a battery indicator shows on the display upper
left hand corner. Below Table 3 is the explanation:

Battery Voltage

8.5V or less. It means the battery is
empty, don’t use the Meter as it cannot
guarantee accuracy.

8.6V~9.0V . It means the battery is nearly
empty, replacing battery is necessary.
Accuracy will not be affected.

9.1V~10.2V

10.3V or more

Table 3. Battery Indication

Battery
Indicator