Keysight U1452AT, U1452A, U1451A Quick Start Manual

Keysight U1452A/U1452AT/
U1451A Insulation Tester

Quick Start Guide

U1452A/U1452AT/U1451A Insulation Tester

NOTE

Standard accessories included in your purchase

Standard accessories included in your purchase

The following accessories are shipped standard with the
U1452A, U1452AT, and U1451A testers:

✔ Hard carrying case
✔ Alligator clips (red and black)
✔ Test leads (red and black)
✔ 19 mm probes (red and black)
✔ 4 mm probes (red and black)
✔ IR to USB cable
✔ Four 1.5 V AA alkaline batteries
✔ Printed copy of the U1452A/U1452AT/U1451A

Quick Start Guide (this document)

Model U1452A also includes the following accessories:

✔ Remote switch probe and adapter
✔ U1117A IR to Bluetooth adapter
✔ Printed copy of the U1117A Operating Instructions

If any item is missing or damaged, keep the shipping materials
and contact the nearest Keysight Sales Office.

The descriptions and instructions in this guide apply to the
U1452A, U1452AT, and U1451A Insulation Tester.

Model U1452A appears in all illustrations. The word tester is
used to represent all models.

All related documents and software are available for download
at www.keysight.com/find/hhTechLib.

U1452A/U1452AT/U1451A Quick Start Guide 1

U1452A/U1452AT/U1451A Insulation Tester

1 2

3 4

Install or Change the Batteries

Install or Change the Batteries

The tester is powered by four 1.5 V AA alkaline batteries
(included in the shipment).

Before installing or changing the batteries, pull from a corner
and stretch the orange rubber holster to remove it.

Turn On the Tester

2 U1452A/U1452AT/U1451A Quick Start Guide

Turn the rotary switch
from the position
to any other position
to begin making
measurements.

U1452A/U1452AT/U1451A Insulation Tester

Red LED indicator

Keypad

Rotary switch

Fuse access

Tilt stand

Display screen

Input terminals

Test lead/probe holders

IR communication port

(Under the orange rubber holster)

Battery access

(Under the orange rubber holster)

The Tester at a Glance

The Tester at a Glance

U1452A/U1452AT/U1451A Quick Start Guide 3

U1452A/U1452AT/U1451A Insulation Tester

NOTE

WARNING

Using the Rotary Switch

Using the Rotary Switch

Press [T DAR PI] to select the alternate measurement func­tion(s) or test methods for insulation resistance tests.

Legend Measurement function

50 V insulation resistance test,

T, DAR, PI

100 V insulation resistance test,

T, DAR, PI

250 V insulation resistance test,

T, DAR, PI

500 V insulation resistance test,

T, DAR, PI

1000 V insulation resistance test,

T, DAR, PI

Earth-bond resistance, T

Resistance, Continuity

Capacitance

Auto (V), DC V, AC V

[1]

[1]

[1]

[1]

[1]

Model

U1452A U1452AT U1451A

✔✔

✔✔

✔

✔

✔

-

-

-

-

-

✔

✔

✔

✔✔✔

✔✔✔

✔✔✔

✔✔✔

[1]

DAR and PI tests for models U1452A and U1452AT only.

Remove the test leads from the measuring source or target
before changing the rotary switch position.

Refer to the U1452A/U1452AT/U1451A User’s Guide for a
complete list and description of all rotary switch labels.

4 U1452A/U1452AT/U1451A Quick Start Guide

Using the Keypad

U1452A/U1452AT/U1451A Insulation Tester

Using the Keypad

Legend

Key response when pressed for:

Less than 1 second More than 1 second

IR Test: Initiates an insulation test

[1]

as long as [Te s t ] is
held ( is shown) — the tester sources (outputs) a high
voltage and measures insulation resistance

EBR Test: Initiates an earth-bond resistance test

[2]

as long

as [Te s t] is held ( is shown)

Auto Hold: Automatically

Trig Hold: Freezes the present

reading in the display

[3]

freezes the present read­ing once the reading is

[3]

stable

Lock: Locks the insulation test

or earth-bond resistance test

Hz: Displays the frequency
(when the rotary switch is in
the V position)

[4]

View (U1452A and
U1452AT): Enters the Log

review menu

Esc: Discards the changes
made in the Setup menu

Selects the alternate measure­ment function(s)

T/Time: Configures the tester
for a timed test

DAR (U1452A and U1452AT):
Configures the tester for a
dielectric absorption ratio

[1][5]

test

[4][5]

Log (U1452A and
U1452AT): Starts the data

Log

PI (U1452A and U1452AT):
Configures the tester for a
polarization index test

Limit: Enables Limit compari­son

[1][5]

Smooth: Enables Smooth

Range: Sets a manual range

Auto: Enables autorang-

Leak (U1452A and U1452AT):

Displays the leakage current

[4]

ing

U1452A/U1452AT/U1451A Quick Start Guide 5

U1452A/U1452AT/U1451A Insulation Tester

WARNING

Using the Input Terminals

Legend

Key response when pressed for:

Less than 1 second More than 1 second

Null: Enables Null -

: Enable or disable the LCD

backlight

[1]

When the rotary switch is in one of the Ω

[2]

When the rotary switch is in the Ω EB position.

[3]

When the rotary switch is NOT in one of the Ω

[4]

When the rotary switch is in one of the Ω

[5]

Press [Te s t] to start the test.

Using the Input Terminals

Setup: Enters the Setup

menu

position.

Mega

or the Ω EB position.

Mega

or the Ω EB position.

Mega

To avoid damaging this device, do not exceed the input limit.

Rotary position Input terminals Overload protection

1000 Vrms

1000 Vrms for
short circuit <0.3 A

440 mA/1000 V, 30 kA
fast-acting fuse

6 U1452A/U1452AT/U1451A Quick Start Guide

U1452A/U1452AT/U1451A Insulation Tester

CAUTIONCAUTION

3

2

1

Select a

test voltage

Remote
Switch
Probe

Insulation Resistance (IR) Test

Insulation Resistance (IR) Test

Ensure that the device-under-test (DUT) is de-energized before
performing any resistance measurement.

The tester automatically detects if the circuit is energized. If
the external voltage is detected to be greater than 30 V, the
test is inhibited and the voltage hazard symbol ( ) is shown on
the display.

DO NOT perform insulation resistance test in distribution sys­tems with voltages higher than 600 V.

U1452A/U1452AT/U1451A Quick Start Guide 7

U1452A/U1452AT/U1451A Insulation Tester

4

Test will continue until

[Te s t] is released.

Hold

NOTE

=

2

1

Press [Te s t] or [Lock]
again to unlock and
stop the test.

Press once

Insulation Resistance (IR) Test

When an insulation test is in progress, the red LED indicator at
the top of the tester will blink every 2 seconds (if the Limit
function is not enabled).

Using the Remote Switch Probe

Locking the Test for IR/EBR Tests

8 U1452A/U1452AT/U1451A Quick Start Guide

U1452A/U1452AT/U1451A Insulation Tester

1

2

3

OR

NOTE

Performing PI/DAR/T Tests

Insulation Resistance (IR) Test

Polarization Index (PI) = IR

10 minutes

Dielectric Absorption Ratio (DAR) = IR

(default; can be changed to IR

Timed (T) = IR

•Press [Range] or [Limit] to toggle the display between the

1 minute

(default; can be changed in Setup)

60 seconds

/IR

1 minute

60 seconds

/IR

15 seconds

/IR

30 seconds

in Setup)

timer and the measured value during PI, DAR, or T tests.

• Err is shown on the display if the IR is greater than the
maximum range or less than 0.001 MΩ after t1/t15/t30; if
the test is interrupted by the user; or if the tester’s battery is
low.

U1452A/U1452AT/U1451A Quick Start Guide 9

U1452A/U1452AT/U1451A Insulation Tester

NOTE

Insulation Resistance (IR) Test

Viewing Leakage Current

Press [Range] after the IR test to view the leakage current; or
press [Range] during the IR test to view the leakage current if
the IR test is locked (see page 8).

Viewing the leakage current for DAR, PI, or T tests:

Press [Range] first before selecting the PI, DAR, or T test.
Then, press [Test] to view leakage current.

10 U1452A/U1452AT/U1451A Quick Start Guide

U1452A/U1452AT/U1451A Insulation Tester

CAUTIONCAUTION

3

2

1

Remote
Switch
Probe

4

>

Hold

OR

Earth-Bond Resistance (EBR) Test

Earth-Bond Resistance (EBR) Test

The tester automatically detects if the circuit is energized. If
the external voltage is detected to be greater than 2 V, the test
is inhibited. Disconnect the tester and remove power from the
circuit before proceeding.

U1452A/U1452AT/U1451A Quick Start Guide 11

U1452A/U1452AT/U1451A Insulation Tester

The symbol blinks during the identification

DC

AC

The AC+DC value is shown in the secondary display

AC

3

DC

2

1

Voltage Measurements

Voltage Measurements

The Auto function is able to automatically

• Identify the signal component (AC or DC) of an electrical

source to be indicated on the primary display, and

• Select a suitable measurement range according to the
AC+DC reading

12 U1452A/U1452AT/U1451A Quick Start Guide

U1452A/U1452AT/U1451A Insulation Tester

3

2

1

2

1

Resistance Measurement

Resistance Measurement

Removing Test Lead Resistance

U1452A/U1452AT/U1451A Quick Start Guide 13

U1452A/U1452AT/U1451A Insulation Tester

CAUTIONCAUTION

2

1

3

ON

(closed)

OFF

(open)

4

Continuity Test

Continuity Test

To avoid possible damage to your tester or to the equipment
under test, disconnect the circuit power and discharge all
high-voltage capacitors before performing continuity tests.

14 U1452A/U1452AT/U1451A Quick Start Guide

U1452A/U1452AT/U1451A Insulation Tester

CAUTIONCAUTION

1

3

+

–

2

NOTE

Capacitance Measurement

To avoid possible damage to the tester or to the equipment
under test, disconnect circuit power and discharge all
high-voltage capacitors before measuring capacitance.

Before proceeding with capacitance measurements, first use
the DC V function to confirm that the capacitor is fully
discharged.

Capacitance Measurement

The cable length equivalent of the circuit under test is shown
in the secondary display. The default scale is 1 km per 40 nF.

U1452A/U1452AT/U1451A Quick Start Guide 15

U1452A/U1452AT/U1451A Insulation Tester

Capacitance Measurement

THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

16 U1452A/U1452AT/U1451A Quick Start Guide

Contacting Keysight

CAUTIONCAUTION

WARNING

CAT III

1000 V

CAT IV

600 V

You can contact Keysight Technologies at one of the following telephone
numbers for warranty, service, or technical support information:

• In the United States: [phone]

• In Canada: [phone]

• In China: 800-810-0189

• In Europe: 31 20 547 2111

• In Japan: 0120-421-345

Or use our Web link for information on contacting Keysight worldwide:

www.keysight.com/find/assist

Or contact your Keysight Technologies Representative.

Safety Notices

A CAUTION notice denotes
a hazard. It calls attention
to an operating procedure,
practice, or the like that, if
not correctly performed or
adhered to, could result in
damage to the product or
loss of important data. Do
not proceed beyond a CAU-
TION notice until the indi­cated conditions are fully
understood and met.

A WARNING notice
denotes a hazard. It calls
attention to an operating
procedure, practice, or the
like that, if not correctly
performed or adhered to,
could result in personal
injury or death. Do not pro­ceed beyond a WARNING
notice until the indicated
conditions are fully under­stood and met.

EMC designed in compliance with IEC
61326-1:2005/EN 61326-1:2006. Use with
standard or compatible test probes.

Safety Symbols

Earth (ground) terminal

Equipment protected
throughout by double insula­tion or reinforced insulation

Caution, risk of electric
shock

Caution, risk of danger (refer
to the instrument manual for
specific Warning or Caution
information)

Category III 1000 V overvolt­age protection

Category IV 600 V overvolt­age protection

Do not use in distribution
systems with voltages
higher than 600 V

Safety and EMC Information

This meter is safety-certified in compliance
with IEC/EN 61010-1:2010 for Category III
1000 V and Category IV 600 V; and IEC/EN
61557-1, IEC/EN 61557-2, IEC/EN 61557-4.

For more details on any information not found in this document, refer to the

Keysight U1452A/U1452AT/U1451A Insulation Tester User’s Guide

This information is subject to change without notice.

© Keysight Technologies 2013, 2014

Edition 2, August 2014

*U1451-90001*

U1451-90001

www.keysight.com