380385 [EXTECH]

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects

in parts and workmanship for one year from date of shipment (a six month limited

warranty applies on sensors and cables). If it should become necessary to return the

instrument for service during or beyond the warranty period, contact the Customer

Service Department at (781) 890-7440 ext. 210 for authorization or visit our website at

www.extech.com (click on Contact Extech and go to Service Department to request an

RA number). A Return Authorization (RA) number must be issued before any product is

returned to Extech. The sender is responsible for shipping charges, freight, insurance

and proper packaging to prevent damage in transit. This warranty does not apply to

defects resulting from action of the user such as misuse, improper wiring, operation

outside of specification, improper maintenance or repair, or unauthorized modification.

Extech specifically disclaims any implied warranties or merchantability or fitness for a

specific purpose and will not be liable for any direct, indirect, incidental or consequential

damages. Extech's total liability is limited to repair or replacement of the product. The

warranty set forth above is inclusive and no other warranty, whether written or oral, is

expressed or implied.

Introduction

Congratulations on your purchase of the Extech High Voltage Insulation Tester. This

device has four pre-set voltage test ranges (up to 10kV) and measures insulation

resistance to 500GΩ. Other voltage test values can be selected using the ±500V step

buttons. This professional meter, with proper care, will provide years of safe reliable

service.

Safety

1.

2.

3.

4.

5.

6.

Circuits under test must be de-energized and isolated before connections are made.

Circuit connections must not be touched during a test.

After insulation tests, capacitors must be discharged.

Test leads (including alligator clips) must be in good working order, clean and without

broken or cracked insulation.

When servicing, use only specified replacement parts.

Environmental conditions:

•

•

•

•

Indoor use only; Installation category III 300V

Pollution degree 2

Altitude up to 2000 meters

Relative Humidity 80% max.; Temperature 0 to 40 C

o

International Safety Symbols

Caution, refer to this manual before using this meter

Dangerous Voltages; risk of electric shock

Meter is protected throughout by double or reinforced insulation

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380385 V1.5 3/04

Specifications

General specifications

Display

Range selection

Bargraph

Automatic discharge

Low battery indicator

Power source

Auto Power off

Enersave

TM

2 x 20 character alphanumeric multi-function dot matrix

20 ranges in 500V steps with automatic ranging.

Preset buttons for 1KV, 2.5KV, 5KV, and 10KV

Displays voltage ramp, soak, and decay

After automatic & manual stop or upon completion of test

"Replace battery" displayed when battery voltage is low

Eight 1.5V ‘C’ cells; Battery life 40 hrs (no load at 10kV)

After 5 minutes of inactivity

Shorter test time to conserve battery life

Supplied. RED (length = 108”) with GREEN guard lead.

BLACK lead is 42”.

32 to 104 F (0 to 40 C); < 80% RH

14 to 140 F (-10 to 60 C); < 80% RH

13 x 10.2 x 6.3” (330 x 260 x 160mm)

7.9 lbs (3.6kg)

o

o

o

o

mode

Test Leads

Operating conditions

Storage conditions

Dimensions

Weight

Range Specifications

DC Test

Voltages

0.5KV

1KV

1.5KV

2KV

2.5KV

3KV

3.5KV

4KV

4.5KV

5KV

5.5KV

6KV

6.5KV

7KV

7.5V

8KV

8.5KV

9KV

9.5KV

10KV

Resistance

Ranges (in GΩ)

25

50

75

100

125

150

175

200

225

250

275

300

325

350

375

400

425

450

475

500

Short Circuit

Current

100mA

Accuracy

Resolution

120mA

± (3% + 2d)

1MΩ

170mA

360mA

Note: Voltage Regulation is +20% -5% unless current limited.

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380385 V1.5 3/04

Meter Description

1.

2.

3.

4.

5.

Test lead jacks

Dot Matrix Display

Keypad

Battery compartment (on bottom)

Test lead compartment latch

2

3

4

5

1

Preparation

Warning:

Ensure that the circuit under test does not include devices or components that

can be damaged by 10KVDC; such devices include power factor correction capacitors, low

voltage mineral insulated cables, electronic light dimmers, ballasts and starters for

fluorescent lamps.

Connecting the Test Leads to the meter

The

Black (Earth), Red (Line),

and

Green (Guard)

test leads connect to the meter

directly above the dot matrix display (the meter jacks are color coded). NOTE: The

Green

(Guard)

lead is attached to the Red lead and should be used (refer to applications section

next).

Connecting the Test Leads to the device under test

The

Black (Earth)

lead is connected to the conductive material. The

Red (Line)

and

Green (Guard)

leads are connected to insulating, sheathing, and covering material as

shown in the following applications section.

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380385 V1.5 3/04

Operation

Powering the meter

Press the

ON

button to turn the unit on. Press the

OFF

button to turn the unit off.

Insulation Resistance Measurements

Warning:

The circuit under test must be completely de-energized and isolated before

making test connections.

1. After turning the unit on, the display will prompt the user

to select a test voltage (diagram at right).

Select Voltage:

250000MΩ V = 5000V

2. Select the test voltage by pressing one of the preset

voltage buttons (1KV,

2.5KV, 5KV, 10KV)

or by pressing the Voltage Adjust buttons

(500+,

500-)

to step through the available test voltages in 500V steps.

3. The resistance range for the selected voltage is indicated on the dot matrix display as

shown above.

4. Press the

TEST START / STOP

button again.

5. The display will prompt the user to connect the leads.

Press the

TEST START/STOP

button to start testing.

Connect Leads . . . .

. . . . . . Press TEST

6. The elapsed test time appears on the upper line (right

hand side) of the display. The resistance reading is shown on the upper left hand side

of the display. The lower line shows the test voltage in bargraph format (see diagram

at right).

R=9.998MΩ

6.8s

7. The HOLD icon will appear in place of the bargraph

0>

█ █ █ █ █ █

<500V

when the test is complete and the voltage has been

discharged.

WARNING:

DO NOT REMOVE THE TEST LEADS BEFORE THE HOLD DISPLAY

APPEARS.

8. The meter automatically discharges the system at the end of the test.

9. The meter automatically powers down after 5 minutes.

The Enersave

TM

TM

Mode

Enersave mode conserves battery life by performing a relatively short test (10 seconds).

TM

The Enersave mode is the default test mode. To bypass this mode and run a longer test

(100 seconds max), press and hold the

TEST

button for 3 seconds when starting a test.

Bargraph Voltage Display

The bargraph represents the voltage present on the test leads as it rises, soaks, and

decays. The bargraph appears on the lower left of the dot matrix display during a test.

Automatic Under/Over Range Resistance Detect

If the display shows the message “LOW MΩ”, the test should be interrupted immediately

by pressing the

TEST

button. This message indicates that the insulation under test has

broken down and the meter is trying to inject a high potential onto a short circuit. If ‘HIGH’

appears, it is likely that the test configuration is open. Check the test set-up then test

again.

Elapsed Timer

The test duration is indicated on the display. This is particularly useful in determining

whether an insulating material under test will break down in a given amount of time.

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380385 V1.5 3/04