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Agilent
U1452A/U1452AT/U1451A
Insulation Tester
Quick Start Guide
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 Agilent Sales Office.
NO TE
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.agilent.com/find/hhTechLib.
Agilent Technologies
U1452A/U1452AT/U1451A Insulation Tester
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.
1 2
3 4
Turn On the Tester
Turn the rotary switch
from the position
to any other position
to begin making
measurements.
2 U1452A/U1452AT/U1451A Quick Start Guide
U1452A/U1452AT/U1451A Insulation Tester
The Tester at a Glance
The Tester at a Glance
Red LED indicator
Display screen
Keypad
Rotary switch
Input terminals
IR communication port
Test lead/probe holders
Battery access
(Under the orange rubber holster)
Tilt stand
Fuse access
(Under the orange rubber holster)
U1452A/U1452AT/U1451A Quick Start Guide 3
U1452A/U1452AT/U1451A Insulation Tester
Using the Rotary Switch
Using the Rotary Switch
NO TE
Press [T DAR PI] to select the alternate measurement func-
tion(s) or test methods for insulation resistance tests.
Model
Legend Measurement function
U1452A U1452AT U1451A
50 V insulation resistance test,
T, DAR, PI[1]
-
100 V insulation resistance test,
T, DAR, PI[1]
-
250 V insulation resistance test,
T, DAR, PI[1]
-
500 V insulation resistance test,
T, DAR, PI[1]
-
1000 V insulation resistance test,
T, DAR, PI[1]
-
Earth-bond resistance, T
Resistance, Continuity
Capacitance
Auto (V), DC V, AC V
[1] DAR and PI tests for models U1452A and U1452AT only.
WA RN ING
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
U1452A/U1452AT/U1451A Insulation Tester
Using the Keypad
Using the Keypad
Key response when pressed for:
Legend
Less than 1 second More than 1 second
IR Test: Initiates an insulation test[1] 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[2] as long
as [Test] is held ( is shown)
Auto Hold: Automatically
Trig Hold: Freezes the present freezes the present read-
reading in the display[3] ing once the reading is
stable[3]
Lock: Locks the insulation test
or earth-bond resistance test[4]
Hz: Displays the frequency View (U1452A and
(when the rotary switch is in U1452AT): Enters the Log
the V position) review menu
Esc: Discards the changes
made in the Setup menu
Selects the alternate measure-
ment function(s)
T/Time: Configures the tester
for a timed test[4][5]
DAR (U1452A and U1452AT): Log (U1452A and
Configures the tester for a U1452AT): Starts the data
dielectric absorption ratio Log
test[1][5]
PI (U1452A and U1452AT):
Configures the tester for a
polarization index test[1][5]
Limit: Enables Limit compari-
Smooth: Enables Smooth
son
Range: Sets a manual range
Auto: Enables autorang-
Leak (U1452A and U1452AT): ing
Displays the leakage current[4]
U1452A/U1452AT/U1451A Quick Start Guide 5
U1452A/U1452AT/U1451A Insulation Tester
Using the Input Terminals
Key response when pressed for:
Legend
Less than 1 second More than 1 second
Null: Enables Null -
: Enable or disable the LCD Setup: Enters the Setup
backlight menu
[1] When the rotary switch is in one of the
Mega position.
[2] When the rotary switch is in the
EB position.
[3] When the rotary switch is NOT in one of the
Mega or the EB position.
[4] When the rotary switch is in one of the
Mega or the EB position.
[5] Press [Test] to start the test.
Using the Input Terminals
WA RN ING
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
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.
CAU TI O N
DO NOT perform insulation resistance test in distribution sys-
tems with voltages higher than 600 V.
Select a
test voltage 3
2
1 Remote
Switch
Probe
U1452A/U1452AT/U1451A Quick Start Guide 7
U1452A/U1452AT/U1451A Insulation Tester
Insulation Resistance (IR) Test
4 Hold
Test will continue until
[Test] is released.
NO TE
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
1
2 Press once
Press [Test] or [Lock]
again to unlock and
stop the test.
8 U1452A/U1452AT/U1451A Quick Start Guide
U1452A/U1452AT/U1451A Insulation Tester
Insulation Resistance (IR) Test
Performing PI/DAR/T Tests
1
2
3
OR
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)
NO TE
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