Keysight Technologies U1452A User manual

Keysight U1452A/
U1452AT/U1451A
Insulation Tester
Quick Start
Guide

Contacting Keysight
www.keysight.com/find/assist
(worldwide contact information for
repair and service)
Safety and EMC Information
This meter is safety-certified in
compliance with IEC/EN 61010-1,
IEC/EN 61010-2-030, IEC/EN
61010-2-033, CAN/CSA-C22.2 No.
61010-1, CAN/CSA-C22.2 No.
61010-2-030, CAN/CSA-C22.2 No.
61010-2-033, UL Std. No.
61010-1, UL Std. No. 61010-2-030
and UL Std. No. 61010-2-033.
EMC designed in compliance with
IEC 61326-1/EN 61326-1,
CISPR11/EN55011 Group 1 Class
A, ICES/NMB-001, and AS/NZS
CISPR 11. Use with standard or
compatible test probes.
Safety Notices
CAUTION
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 CAUTION notice
until the indicated conditions are
fully understood and met.
WARNING
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.
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
CAT III
1000 V
CAT IV
600 V
2 U1452A/U1452AT/U1451A Quick Start Guide
For further safety information details, refer to the
Keysight U1452A/U1452AT/U1451A Insulation Tester User’s Guide.
ENGLISH

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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
✔Certificate of Calibration
Model U1452A also includes the following
accessories:
✔Remote switch probe and adapter
If any item is missing or damaged, keep the
shipping materials and contact the nearest
Keysight Sales Office.
NOTE
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.

4 U1452A/U1452AT/U1451A Quick Start Guide
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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
Turn the rotary
switch from the
position to
any other position
to begin making
measurements.
1 2
3 4

U1452A/U1452AT/U1451A Quick Start Guide 5
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The Tester at a Glance
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
Battery access
(Under the orange rubber
holster)
holster)

6 U1452A/U1452AT/U1451A Quick Start Guide
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Using the Rotary Switch
NOTE
Press [T DAR PI]to select the alternate
measurement function(s) or test methods for
insulation resistance tests.
Legend Measurement function Model
U1452A U1452AT U1451A
50 V insulation resistance test,
T, DAR, PI[a] ✔✔ -
100 V insulation resistance test,
T, DAR, PI[a] ✔✔ -
250 V insulation resistance test,
T, DAR, PI[a] ✔-✔
500 V insulation resistance test,
T, DAR, PI[a] ✔-✔
1000 V insulation resistance test,
T, DAR, PI[a] ✔-✔
Earth-bond resistance, T✔✔✔
Resistance, Continuity ✔✔✔
Capacitance ✔✔✔
Auto (V), DC V, AC V ✔✔✔
[a] DAR and PI tests for models U1452A and U1452AT only.
WARNING
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.

U1452A/U1452AT/U1451A Quick Start Guide 7
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Using the Keypad
Legend Key response when pressed for:
Less than 1 second More than 1 second
IR Test: Initiates an insulation test[a] as long as [Test] is
held ( is shown) — the tester sources (outputs) a high
voltage and measures insulation resistance
EBR Test: Initiates an earth-bond resistance test[b] as long
as [Test] is held ( is shown)
Trig Hold: Freezes the present
reading in the display[c]
Auto Hold: Automatically
freezes the present
reading once the reading
is stable[c]
Lock: Locks the insulation test
or earth-bond resistance
test[d]
View (U1452A and
U1452AT): Enters the Log
review menu
Hz: Displays the frequency
(when the rotary switch is in
the Vposition)
Esc: Discards the changes
made in the Setup menu
Selects the alternate
measurement function(s)
Log (U1452A and
U1452AT): Starts the
data Log
T/Time: Configures the tester
for a timed test[d][e]
DAR (U1452A and U1452AT):
Configures the tester for a
dielectric absorption ratio
test[a][e]
PI (U1452A and U1452AT):
Configures the tester for a
polarization index test[a][e]
Limit: Enables Limit
comparison Smooth: Enables Smooth

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Using the Input Terminals
Range: Sets a manual range
Auto: Enables
autoranging
Leak (U1452A and U1452AT):
Displays the leakage current[d]
Null: Enables Null -
:Enable or disable the LCD
backlight
Setup: Enters the Setup
menu
[a] When the rotary switch is in one of the Ω Mega position.
[b] When the rotary switch is in the ΩEB position.
[c] When the rotary switch is NOT in one of the Ω Mega or the ΩEB position.
[d] When the rotary switch is in one of the Ω Mega or the ΩEB position.
[e] Press [Test] to start the test.
WARNING
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
Legend Key response when pressed for:
Less than 1 second More than 1 second

U1452A/U1452AT/U1451A Quick Start Guide 9
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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.
CAUTION
DO NOT perform insulation resistance test in
distribution systems with voltages higher than 600 V.
3
2
1
Select a
test voltage
Remote
Switch
Probe

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Using the Remote Switch Probe
Locking the Test for IR/EBR Tests
4
Test will continue until
[Test] is released.
Hold
NOTE
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).
=
2
1
Press [Test] or
[Lock] again to
unlock and stop
the test.
Press once

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Performing PI/DAR/T Tests
Polarization Index (PI) = IR 10 minutes/IR 1 minute
Dielectric Absorption Ratio (DAR) = IR 60 seconds/
IR 30 seconds (default; can be changed to IR 60
seconds/IR 15 seconds in Setup)
Timed (T) = IR 1 minute (default; can be changed in
Setup)
1
2
3
OR
NOTE
– Press [Range] or [Limit] to toggle the display
between the 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.

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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 10).
NOTE
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.

U1452A/U1452AT/U1451A Quick Start Guide 13
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Earth-Bond Resistance (EBR) Test
CAUTION
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.
3
2
1
Remote
Switch
Probe
4
>
Hold
OR

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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
The symbol blinks during the identification
DC
AC
The AC+DC value is shown in the secondary display
AC
3
DC
2
1

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Resistance Measurement
Removing Test Lead Resistance
3
2
1
2
1

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Continuity Test
CAUTION
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.
2
1
3
ON
(closed)
OFF
(open)
4

U1452A/U1452AT/U1451A Quick Start Guide 17
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Capacitance Measurement
Before proceeding with capacitance
measurements, first use the DC V function to
confirm that the capacitor is fully discharged.
CAUTION
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.
1
3
+–
2
NOTE
The cable length equivalent of the circuit under test
is shown in the secondary display. The default scale
is 1 km per 40 nF.

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THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

This information is subject to change
without notice. Always refer to the
Keysight website for the latest revision.
© Keysight Technologies 2013 - 2021
Edition 4, January 2021
Printed in Malaysia

U1451-90001
www.keysight.com