Huazheng HZ-5100s Portable Handheld Contact Resistance Tester

The hand-held contact resistance tester is an innovative product designed for ease of use. It features a compact, portable design, with hand-held operation and battery power supply, making it easy to carry and use in various locations.This device is primarily used for measuring contact resistance and other low resistance values in switch contacts. It offers fast testing speed and high accuracy, making it an ideal tool for precise measurements.

I. Features

1.Lithium battery power supply: One full charge allows for more than 600 continuous tests, making the testing process simple and convenient.

2.Maximum output current: 100 A, with multiple current stages available, providing a wide testing range.

3.Test duration: When conducting a 100A test, the longest test time can reach up to 60 seconds, which is suitable for various field applications.

4.Wide measurement range and high precision: At 100A, the tester can achieve a precision of up to 2000 μΩ.

5.Comprehensive protection features: Includes open circuit protection, overheating protection, and other essential safety functions.

6.6-inch super-industrial-grade high-brightness color LCD screen: The display remains clearly visible even under strong sunlight.

7.External printer included: Allows for easy printing of test data.

8.Native and USB storage: Supports both internal and USB disk storage for convenient data saving.

II.Technical Index

Measuring Range
Output Current	100A、80A、50A、30A
Measuring Range	100A 0~2000µΩ
	80A 0~5mΩ
	50A 0~10mΩ
	30A 0~20mΩ
Technical Index
Accuracy	±（Reading×0.5%+1µΩ）
Resolution Ratio	0.1µΩ
Display Digit	Four and a half
Test Power Supply	Constant current limit voltage，about 2V
Input Voltage	Maximum 5V
Measuring Time	Quick、10~60 seconds optional
Testing Times	More than 600 times（full charge, fast measurement mode）
Test Line	Resistance less than 10mΩ
Conditions Of Use and Shape
working Power Supply	Built-in lithium battery or external charger，Charger input 100~240VAC，50HZ/60HZ
Charging Voltage	12.6V	Charging Current	≤3A
Charging Time	Abour 3 hrs	Auto Shut Off	5 minutes automatic shutdown without operation
Instrument Weight	1.7kg（exclude test lines）	Instrument Dimension	246mm（L）×156mm（W）×62mm（H）
Environment Temperature	-10℃~50℃	Relative Humidity	≤90%，no dew

III.Product Appearance

Top view

Front View Side View

Function module	Instructions
I+、 I-	Current output terminal, maximum output 100A.
U+、U-	Voltage input jack, maximum input 5V.
Display	5.6 inch large industrial high brightness color LCD screen, display operation menu and test results.
Button	Operate instruments. “↑↓” is the "up and down" key, select to move or modify data; “←→” is the "left and right" key, select to move or modify data; "Enter" key, confirm the current operation; "Cancel" key, abandon the current operation. Instrument power key. Short press to turn on the power supply, long press to turn off the power supply. If there is no key operation, the instrument will shut down automatically after 5 minutes.
RS 232 interface	Connect external printer.
Charging interface	Use instrument charger to recharge
USB interface	External USB disk is used to store test data, please use FAT or FAT32 format U disk; in the storage process, it is strictly prohibited to dial out the USB disk.

II.Battery Charging

When the battery is low after long storage or before the first use of the hand-held device, please use the charger attached to it to charge the battery for at least 3 hours, and continue to use the hand-held tester when charging. When the battery is fully charged, the charger light changes from red to green.