AEMC 1020 Manuel utilisateur

Megohmmeters

Model 1020

Model 1025

Chauvin Arnoux,Inc. d.b.a. AEMC®

Instruments

99-MAN-100110 Rev 0308/18

Megohmmeters

Model 1020

Model 1025

USER MANUAL

MΩ

500 V

Ω

+ Earth

- Line

TEST

TIMER

DATA HOLD

Man. 3 Min.

1000 V

MΩ

250 V

VAC

/ΩVAC

OFF ON

M Ω

MEGOHMMETER

MODEL 1025

Owner’s Record

The serial number for the Megohmmeter Model 1020 or Model 1025

is located on the back of the instrument. Please record this number

and purchase date for your records.

MEGOHMMETER MODEL 1020

CATALOG # 2111.91

SERIAL #:

PURCHASE DATE:

DISTRIBUTOR:

MEGOHMMETER MODEL 1025

CATALOG # 2111.87

SERIAL #:

PURCHASE DATE:

DISTRIBUTOR:

AEMC®Instruments

by Chauvin Arnoux, Inc.

99-MAN-100110

2nd Revision

Printed 07/97

Table of Contents

Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . . . . . .2

Receiving Your Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Safety Check/Voltage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Insulation Resistance Testing (MΩRange) . . . . . . . . . . . . . . . . . .9

Test Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Spot Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Ratio Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

For Successful Insulation Resistance Testing . . . . . . . . . . .11

Insulation Measurement - Connections . . . . . . . . . . . . . . .12

Insulation Resistance Measurements on Motors . . . . . . . .15

Continuity Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Resistance Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Data Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Repair and Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

(North/South America, Australia, New Zealand) . . . . . . . . .20

(Europe, Asia, Africa) . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Technical and Sales Assistance . . . . . . . . . . . . . . . . . . . . . . . . .22

Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Warning

These safety warnings are provided to ensure the safety of per-

sonnel and proper operation of the instrument.

•Read this instruction manual completely before attempting to

use or service this instrument and follow all safety information.

•Safety is the responsibility of the operator!

• Tests are to be carried out only on dead circuits! Check for live

circuits before making resistance measurements (safety

check).

•Always make connections from the instrument to the circuit

under test.

•The Megohmmeter Models 1020 and 1025 are sources of high

voltage, as is the sample connected to them. All persons per-

forming or assisting in the tests must employ all safety precau-

tions to prevent electrical shock to themselves and to others.

• AEMC®considers the use of rubber gloves to be an excellent

safety practice even if the equipment is properly operated and

correctly grounded.

•When testing capacitance samples, make sure that they have

been properly discharged and that they are safe to touch.

Dielectric insulation samples should be short-circuited for at

least five times the amount of time they were energized.

•Never open the back of the instrument while connected to any

circuit or input.

2Megohmmeter Models 1020 and 1025

International Electrical Symbols

This symbol signifies CAUTION! and requests that the user

refer to the user manual before using the meters.

Receiving Your Shipment

Upon receiving your shipment, check to be sure that the contents

agree with the packing slip. Notify your distributor at once of any

shortages. If the equipment appears to be damaged, file a claim

immediately with your carrier, and notify your distributor at once, giv-

ing a detailed description of the damages. Save the damaged pack-

ing container to substantiate your claims.

Packaging

Megohmmeters Model 1020 (Cat. #2111.91) and Model 1025 (Cat.

#2111.87) are shipped with a carrying case, two color-coded leads,

six 1.5 V “AA” batteries, and an instruction manual.

Description

Model 1020 and Model 1025 are compact, light-weight, battery-oper-

ated, digital megohmmeters. The Model 1020 tests at 250 V and 500

V up to 200 MΩ. The Model 1025 adds an additional voltage range of

1000 V, and measures up to 2000 MΩ.

The Models 1020 and 1025 also feature a continuity test range with

an audible beeper for resistances under 100Ω, and a 600 VAC range

for safety voltage check.

The press-to-test button has an associated locking feature for contin-

uous tests up to three minutes, eliminating the need to hold down the

button manually.

Other features include a large 3-1/2 digit LCD, automatic zero, data

hold switch, and low battery indicator. These light-weight, easy-to-use

megohmmeters can be used for most commonly performed insulation

tests, such as on cables, switch gear, motors, DC generators, power

tools, and small appliances.

The Models 1020 and 1025 include test leads, batteries, carrying

case, and user manual.

Megohmmeter Models 1020 and 1025 3

Models 1020/1025 Features

•Model 1020 measures insulation at 250 and 500 V.

• Model 1025 measures insulation at 250, 500, and 1000 V.

• Continuity test

• Continuity beeper

• 600 V AC safety test voltage range

• Large, easy-to-read digital display

• Data hold switch

• Three-minute “lock-on” test button for hands-free operation

• Automatic discharge when test button is released

• Low battery indication

4Megohmmeter Models 1020 and 1025

Models 1020/1025 Specifications

ELECTRICAL SPECIFICATIONS

INSULATION TESTS

DC Test Voltage:

250 V and 500 V (Model 1020)

250, 500, 1000 V (Model 1025)

Megohm Range:

0.1 to 200 MΩ(Model 1020 and 1025)

1 to 2000 MΩ(Model 1025 @ 1000 V)

Resolution:

250 and 500 V : 0.1 MΩ

1000 V : 1 MΩ

Short Circuit Current:

0.4 mA max. at 250 V

0.9 mA max. at 500 V

1.7 mA max. at 1000 V

Accuracy:*

0.1 to 1000 MΩ: 3% of reading ± 3 digits

1000 to 2000 MΩ: 5% of reading ± 3 digits (Model 1025 only)

Test Voltage Generation:

Solid state circuitry generating test voltage (± 10%).

RESISTANCE TESTS (Ω)

Range: 0.1 to 200Ω

Accuracy:* 1% of reading ± 2 digits

Maximum Open Circuit Voltage: 3.3 V

Overload Protection: 500V DC/AC

Megohmmeter Models 1020 and 1025 5

*Accuracies are at 23° C ± 5° C, below 80% RH

CONTINUITY TESTS (Ω)

Range: 0 - 100Ω(with display and beeper)

Resolution: 0.1Ω

Operation Resistance: < 100Ω

Max. Open Circuit Voltage: 3.2 V

Overload Protection: 500 V DC/AC

VOLTAGE TESTS SAFETY CHECK (VAC)

Range: 0 - 600 V AC

Resolution: 1 V

Accuracy:* 0.8% of reading ± 3 digits

Input Impedance: 10 MΩ

GENERAL SPECIFICATIONS

Power Supply: Six 1.5 V “AA” batteries

Low Battery Indication: Indicator on LCD

Display: 3-1/2 digit LCD, 0.65” height

Overrange Indicator: Highest digit of (1) displayed

Operating Temperature: 32° to 104°F (0° to 40°C)

Storage Temperature: 14° to 140°F (-10° to 60°C)

Operating Humidity: 0 - 80% RH

Storage Humidity: 0 - 70% RH

Dimensions: 6.5 x 3.9 x 2.2” (165 x 100 x 57mm)

Weight: 1.1 lb (500 g) approx.

6Megohmmeter Models 1020 and 1025

*Accuracies are at 23° C ± 5° C, below 80% RH

Megohmmeter Models 1020 and 1025 7

Ω

Model 1020

1. Digital Display

2. Data Hold Switch

3. Manual and Lock Switch

(locks power on for 3 minutes)

4. Press-to-Test Button

5. Range Selector Switch

6. Test Terminals

Figure 1

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