Huazheng HZ2321 User manual

HZ2321

Contact Resistance Tester

USER MANUAL

Huazheng Electric Manufacturing (Baoding) Co., Ltd

Dear use r:

Thank you for choosing HZ2321 Contact Resistance Teste r.

We hope that this instrum ent can mak e your wo rk easier an d mo re

en jo ya bl e, so tha t you can ge t th e feeli ng of office aut omat ion in the test

an d analysis work.

Before using the instrument, please read this man ua l, an d op er ate and

maintain the inst rume nt ac cording to the manual to pro long its service li fe.

"Just a lig ht pr ess, the tes t will be complete d aut omatically" is the

op er atin g charact eristics of this inst rument.

If you ar e sat isfied wi th th is in st rument, please tell your col le ag ue s;

if yo u are no t sat isfi ed wi th th is inst rume nt, ple ase call (03 12 ) 6775656 to

tell you to serve you at all times-Baoding Huazheng El ec tric Man ufacturing

Co. , Ltd., our com pa ny will definitely mak e you satisfied !

Contents

I.Main Technical Specification and Using Condition...................................................................1

II.Function Instruction of The Panel.............................................................................................. 1

III.Instructions....................................................................................................................................2

IV.Common Breakdowns and Methods........................................................................................ 3

V.Packing List....................................................................................................................................4

According to the requirements of power equipment preventive test rules, the test of

contact resistance of various switchgear is one of the conventional test items. The tester

outputs DC constant current of 100A and 200A. The tester has the advantages of simple

operation interface, high precision, strong anti-interference ability, good repeatability,

small main body size, light weight and easy to carry. The tester has a

thermal micro printer, which is convenient to print the current test results and is practical.

I.Main Technical Specification and Using Condition

1.Technical specification

Test Current

100A

200A

Test Range

0 mΩ~ 20mΩ

0 mΩ~ 10mΩ

Test Times

10S、60S

Accuracy

±（0.5%×R+1μΩ）

Resolution ratio

0.1μΩ

External dimension

340mm×255mm×240mm

Weight

8kg

2.Using condition

Environment temperature：-10℃~40℃

Environment humidity：≤80%RH

Power supply：AC 198 V~242V

Power frequency：(50±1)Hz

II.Function Instruction of The Panel

Diagrammatic sketch of the panel：

-I

+ I

-V

+ V

Contact Resistance Tester

AC220V 10A

RESET TEST PRINT

RESET：Select current or reset tester.

TEST：Start testing

PRINT：Print the result data.

AC 22 0V：AC220V power（Fuse 10A）

：Ground terminal

+I -I：Current terminal

+V -V：Voltage terminal

III.Instructions

3.1 Connect the AC 220V power and connect Earth with ground terminal of tester.

Connect the switch and instrument with the wire according to Figure 1. The test wire which

clamp terminal connect to tested switch, and insert terminal connect to +I、-I 、+V、-V.

+I、-I are thick wires and +V、-V are thin wires.

-V

-I

Figure 1

Warnings: one of the switch terminals must be connected with the earth properly

before connecting the testing wire when the switch is in electric field environment

3.2 After the power on, the LCD displays Test current 200A and Test times 10s.

3.3 You can press“RESET”key to select the test mode：

3.4 You can press “TEST” key to start testing, and the LCD displays as shown in the

following figure.

The resistance of the switch is then displayed on the LCD. When the test time reaches

10s or 60s, the test is completed. The instrument automatically turns off the DC constant

current of 100A or 200A supply, and the LCD flashes to display the resistance value of the

switch.

3.5 After the LCD flicker shows for a period of time, the tester re-enters the mode of

operation selection state. At this point, press the print key to print the current data results.

3.6 After the test, turned off the power and remove the power line and test wires.

IV.Common Breakdowns and Methods

1.The fuse blow after pressing ‘TEST’

Constant - current power supply is fault.

2.Instrument displays

2.1 Current circuit impassable, check test line and clamp

2.2 The resistance of the test product is too large or the test wire is too fine to reach the

selected test current.

2.3 Constant - current power supply is fault

3. Instrument displays

The resistance of the test product is out of range.

No current

Out of range

Test current：200A

Test times：10s

Test current：200A

Test times：60s

Test current：100A

Test times：10s

Test current：100A

Test times：60s

Test current：200A

Test times：10s

Testing 2s

4. Instrument displays

The wire on +V、-V is not good connected causing data instability.

V.Packing List

NO.

Item

Qty

Main machine

one

Power wire of AC220V

one

Testing wire

one

Earth wire

3 meters, 15 meters, one each

Experimental resistance

one（375uΩ）

Fuse

two（10A）

Paper of micro printer

two

Product specification

two

Product certification

one

Inspection report

one

Data instability

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