Extech 380385 Operating Manual

User's Manual

10KV Digital High Voltage Insulation Tester

Model 380385

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 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. 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 III 300V

• 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

380385 V1.5 3/04

Specifications

General specifications

Display 2 x 20 character alphanumeric multi-function dot matrix
Range selection 20 ranges in 500V steps with 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 ‘C’ cells; Battery life 40 hrs (no load at 10kV)
Auto Power off After 5 minutes of inactivity
Enersave
Test Leads Supplied. RED (length = 108”) with GREEN guard lead.

Operating conditions 32 to 104oF (0 to 40oC); < 80% RH
Storage conditions 14 to 140oF (-10 to 60oC); < 80% RH
Dimensions 13 x 10.2 x 6.3” (330 x 260 x 160mm)
Weight 7.9 lbs (3.6kg)

Range Specifications

TM

mode Shorter test time to conserve battery life

DC Test

Voltages

0.5KV 25
1KV 50

1.5KV 75
2KV 100

2.5KV 125
3KV 150

3.5KV 175
4KV 200

4.5KV 225
5KV 250

5.5KV 275
6KV 300

6.5KV 325
7KV 350

7.5V 375
8KV 400

8.5KV 425
9KV 450

9.5KV 475

10KV 500 360mA

Ranges (in GΩ)

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

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

BLACK lead is 42”.

Resistance

Short Circuit

Current

100mA

120mA

170mA

3

Accuracy Resolution

± (3% + 2d)

380385 V1.5 3/04

1MΩ