HVTest HT2671 Manuel utilisateur

Dear Client

Thank you for Purchasing our HT2671 Insulation Resistance

Tester. Please read the manual in detail prior to first use, which will

help you use the equipment skillfully.

Our aim is to improve and perfect the

company's products continually, so there may be

slight differences between your purchase equipment

and its instruction manual. You can find the changes

in the appendix. Sorry for the inconvenience. If you have further

questions, welcome to contact with our service department.

The input/output terminals and the test column

may bring voltage, when you plug/draw the test wire or

power outlet, they will cause electric spark. PLEASE

CAUTION RISK OF ELECTRICAL SHOCK!

Company Address:

T4，No. 41, High-tech 2 Road，East Lake High-tech Development Zone，

Wuhan

Sales Hotline: 86-27- 87457960

After Service Hotline:86-27- 87459656

Fax: 86-27- 87803129

E-mail: [email protected]

Website: www.hvtest.cc

SERIOUS COMMITMENT

All products of our company carry one year limited warranty

from the date of shipment. If any such product proves defective

during this warranty period we will maintain it for free. Meanwhile

we implement lifetime service. Except otherwise agreed by

contract.

SAFETY REQUIREMENTS

Please read the following safety precautions carefully to avoid

body injury and prevent the product or other relevant subassembly

to damage. In order to avoid possible danger, this product can only

be used within the prescribed scope.

Only qualified technician can carry out maintenance or repair

work.

--To avoid fire and personal injury:

Use Proper Power Cord

Only use the power wire supplied by the product or meet the

specification of this produce.

Connect and Disconnect Correctly

When the test wire is connected to the live terminal, please do

not connect or disconnect the test wire.

Grounding

The product is grounded through the power wire; besides, the

ground pole of the shell must be grounded. To prevent electric

shock, the grounding conductor must be connected to the ground.

Make sure the product has been grounded correctly before

connecting with the input/output port.

Pay Attention to the Ratings of All Terminals

To prevent the fire hazard or electric shock, please be care of

all ratings and labels/marks of this product. Before connecting,

please read the instruction manual to acquire information about the

ratings.

Do Not Operate without Covers

Do not operate this product when covers or panels removed.

Use Proper Fuse

Only use the fuse with type and rating specified for the product.

Avoid Touching Bare Circuit and Charged Metal

Do not touch the bare connection points and parts of energized

equipment.

Do Not Operate with Suspicious Failures

If you encounter operating failure, do not continue. Please

contact with our maintenance staff.

Do Not Operate in Wet/Damp Conditions.

Do Not Operate in Explosive Atmospheres.

Ensure Product Surfaces Clean and Dry.

－Security Terms

Warning: indicates that death or severe personal injury may

result if proper precautions are not taken

Caution: indicates that property damage may result if proper

precautions are not taken.

Contents

I. Introduction······························································· 6

II. Function and Features················································7

III. Technique Specification············································· 8

IV. Operation Instructions··············································· 9

V. Notes···································································· 10

I. Introduction

1. Principle of the meter

HT2671 Digital Megger consists of medium and large scale

integrated circuit with high output power and high short-circuit

current value features. The output voltage is up to four grades. The

built-in battery served as power supply become high DC voltage by

DC/DC transformation, which goes from E pole to L pole via the

object being tested. By this way, it produces a current from pole E

to pole L, which converted by I/V and computed by the divider. The

value of insulation resistance will display on the LCD finally.

2. Block Diagram of Circuit

As shown in the following diagram:

3. Applications

The meter is essential and common device in power industry,

post and telecommunications, communications, mechanical and

electrical installation and maintenance and industrial sector or

corporate sector using electric power as theirs industrial power or

energy sources. It is suitable for measuring the resistance of

different kinds of insulating materials and insulation resistance of

transformers, motors, cables and electrical equipment.

II. Function and Features

The meter has the following features:

1. High output power, strong load ability, and strong

anti-interference ability.

The shell body is made of aldural/high-strength aluminum alloy,

equipped with potential protection ring and fourth-order active low

pass filter, it can play an effective role in shielding external power

frequency and strong electromagnetic field. For the measurement

of capacitive specimen, since the short-circuit current is greater

than 1.6mA, it’s easy to rise the test voltage to the rating of output

voltage. For the measurement of low resistance, it will not affect the

test by using scaling method.

2. The meter is battery powered and the measure range is

converted automatically. The easy-to-read panel and LCD display

make measurement very convenient and fast.

3. The output short-circuit current of the meter can be

measured immediately without estimation.

III. Technique Specification

1. Operating Conditions

Temperature: 0℃~+45℃

Relative humidity: ≤85%RH

2. Output voltage grades, measuring range, resolution, error

Output voltage grades: 500V，1000V，2000V，2500V

Measuring range: 0~19990MΩ

Resolution: 0.01MΩ，0.1MΩ，1.0MΩ，10.0MΩ

Relative error: 0~2000MΩ≤±5%±2d,

2000MΩ~19990MΩ≤10%±2d

3. Load ability of maximum output voltage and short-circuit current

Voltage/Load: 2500V/20MΩ

Voltage drop: Approximately 10%

Short-circuit current: >1.6mA

4. Power supply, power dissipation

DC: 8×1.5V(AA, R6)battery

AC: 220V/50Hz

Power dissipation: quiescent power dissipation≤160mW;

Maximum power≤2.5W

5. Dimensions and weight

Dimensions：235mm(L)×200mm(W)×135mm(D)

Weight：<1.4kg

IV. Operation Instructions

1. Measurement Procedure

Turn the power switch “ON/OFF”, the default of meter is at 500V.

Select the required voltage grade and the indicator light will show

the selected voltage grade. Press the high voltage “start/stop”

button and the indicator light for high voltage will glow. The stable

value displaying on the LCD multiplied by 10 is the measured

insulation resistance value. When the tested insulation resistance

value exceeds the upper limit range of the meter, the screen will

only display “1” on the left-most position. Pressing “start/stop”

button will turn off the high voltage. Pressing down the “ON/OFF”

button will turn off the power supply.

Notes: As measure, accompanied with absorption and

polarization occurring, Insulation reading gradually drifts to large

values or bounces up and down, it is normal.

2. Explanation for the wiring terminals

When measuring the insulation resistance you should connect

the “L” line and the measured object to the current-carrying part. The

grounding “E” should be connected to the shell of the measured

object or the earth. Shield “G” is connected to the protection parts or

the other parts which are not being measured of the measured

object to avoid the error caused by shell leakage. When measuring

the insulation resistance among components of electronic products,

the “L” terminal and the “E” terminal can be connected to any line.

When measuring the resistance between phases of electrical

generator, you can choose two among the three phases at will, and

the remaining one should be grounded.

V. Notes

1. When the meter is stored you should pay attention to

environment temperature and moisture. The meter should be place

in dry and ventilated environment and should be shielded from dust,

humidity, vibration, acid, soda and corrosive gas damage.

2. When the measured object is charged, you should disconnect

the power before starting the measurement. Otherwise, that may

endanger safety of your body and the device! The DC voltage

between the “E” terminal and “L” terminal is high after turning on the

high voltage. Make sure any parts of your body should not touch the

terminals during measuring.

3. This meter uses AC and DC power supply. When connect to

AC power supply, the meter will prior use AC power supply; when

not connect to AC power supply, battery will power meter.

4. “←” appearing on the top left corner of the screen says

battery voltage is low and you should replace a new battery. If the

meter will not be used for a long time, all batteries should be

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