Extech 380375 Operating Manual

User's Manual

Digital High Voltage Insulation Tester

Model 380375

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 [phone] 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 Extech’s High Voltage Insulation Tester. This device
has four voltage test ranges (up to 5kV) and measures insulation resistance to 250GΩ.
This professional meter, with proper care, will provide years of safe reliable service.

Safety

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

2. Circuit connections must not be touched during a test.

3. After insulation tests, capacitors must be discharged.

4. Test leads (including alligator clips) must be in good working order, clean and without
broken or cracked insulation.

5. When servicing, use only specified replacement parts.

6. Environmental conditions:

• Indoor use only; Installation category II

• Pollution degree 2

• Altitude up to 2000 meters

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

o

C

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

2

380375 V1.5 3/04

Specifications

General specifications

Display 2 x 16 character alphanumeric multi-function dot matrix

Range selection Automatic ranging

Bargraph Displays voltage ramp, soak, and decay

Automatic discharge After automatic & manual stop or upon completion of test

Low battery indicator "Replace battery" displayed when battery voltage is low

Power source Eight 1.5V AA cells; Battery life 40 hrs (no load at 5kV)

Auto Power off After 30 minutes

Enersave

Operating conditions 32 to 104oF (0 to 40oC); < 80% RH

Storage conditions 14 to 140oF (-10 to 60oC); < 80% RH

Dimensions 4.7 x 6.7 x 3.7” (120 x 170 x 95mm)

Weight 1.94 lbs (880g)

Range Specifications

Test

Voltage

TM

mode Shorter test time to conserve battery life

Resistance

Ranges

Short

Circuit

Accuracy Resolution

Current

500V DC

1000V DC

2500V DC

5000V DC

0 to 25 GΩ

0 to 50 GΩ

0 to 125 GΩ

0 to 250 GΩ

Meter Description

1. Test lead jacks compartment

2. Dot Matrix Display

3. Voltage test buttons

4. ON / TEST button

5. Battery compartment is

located on bottom of unit

1mA

1mA

1mA

1.6 mA

1

\

2

3
4

5

0 to 50GΩ: ± 3% reading

50 to 250GΩ: ± 5% reading

3

1kΩ

380375 V1.5 3/04