Huazheng HZ-5100S User manual

HZ-5100S
Portable Contact Resistance
Tester
Huazheng Electric Manufacturing (Baoding) Co., Ltd

Dear user:
Thank you for choosing HZ-5100SPortable Contact Resistance Tester.
We hope that this instrument can make your work easier and more
enjoyable, so that you can get the feeling of office automation in the test
and analysis work.
Before using the instrument, please read this manual, and operate and
maintain the instrument according to the manual to prolong its service life.
"Just a light press, the test will be completed automatically" is the
operating characteristics of this instrument.
If you are satisfied with this instrument, please tell your colleagues;
if you are not satisfied with this instrument, please call [phone] to
tell you to serve you at all times-Baoding Huazheng Electric Manufacturing
Co., Ltd., our company will definitely make you satisfied !

Important Note
If the instrument is not in use, please turn off the power in time.
If the instrument is not used for a long time, please charge and discharge regularly.
Batteries should be charged and discharged at least once a month.
It is strictly forbidden to use power shortage, which will severely shorten the battery
life and even make the battery scrap. When the instrument is short of power, the power
supply should be switched off and charged immediately. Avoid battery failure due to
excessive battery discharge time.
Charging lamp: the charging lamp on the charger is bright red during charging and
bright green after charging.
Users must not disassemble the instrument and replace the battery without
authorization. When the instrument or battery fails, please return to the factory.

Contents
I.Introduction.....................................................................................................................................1
II.Packaging Content...................................................................................................................... 1
III.Features........................................................................................................................................1
IV.Technical Index............................................................................................................................2
V.Adjust The Wristband.................................................................................................................. 3
VI.Battery Charging.........................................................................................................................3
VII.Tilt Hand-held Tester.................................................................................................................3
VIII.Product Appearance................................................................................................................ 4
IX.Operation Instructions............................................................................................................... 5

1
I.Introduction
The hand-held Circuit resistance tester is an innovative product. The product is
compact, hand-held operation, battery power supply, easy to carry.
The product is mainly used in the measurement of contact resistance and other
micro-Euclidean resistance of switch contacts. The test speed is fast and the accuracy is
high.
II.Packaging Content
After receiving the packing box, open the packing box and check if there is any
damage. If the freight packing box is damaged or the liner material is indented, please
inform the freight company or our salesman immediately.
Please check if you have received the following items in the product package：
√1 Hand-held Circuit resistance tester
√1 sets of test lines (red and black each)
√1 charger
√1 user manual
√1 copy of certificate and factory test report
√1 standard resistor
√1 external printer（optional）
III.Features
Lithium battery power supply, a charge can be continuously tested more
than 600 times, the test process is simple and convenient.
The maximum output current is 100 A, multi-stage current is optional, and
the test range is wide.
When doing 100A test, the longest test time can be up to 60 seconds, which
can satisfy various field applications.
The measuring range is wide and the precision is high. At 100A, it can

2
reach 2000μΩ.
Has the open circuit protection, overheating protection and so on perfect
protection function.
5. 6 inch super-industrial-grade high-brightness color LCD screen, in strong
sunlight display is still clearly visible.
Equipped with external printer, easy to print data.
With native storage and USB disk storage, easy to save data.
IV.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

3
V.Adjust The Wristband
For better grip, strip the belt and adjust the adhesive tape as shown in the following
figure.
VI.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.
VII.Tilt Hand-held Tester
In order to take the instrument or expose the side interface during operation, the
hand-held tester can be tilted, as shown in the figure below.
Lift the tilt seat and pull outward

4
VIII.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
Connect external printer.

5
interface
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.
IX.Operation Instructions
Test wiring
Two test clamps are clamped to switch contacts or test ends.
I+/U+terminals are connected with red test lines, I-/U-terminals are
connected with black test lines, in which the thick-wire inserts are
connected with current terminal I+/I-, and the thin-wire rods are inserted into
voltage terminal U+/U-.
It is necessary to use the special low resistance test line matched with the
instrument, tighten the current connection pole, and firmly clamp the test
clamp to reduce the lead resistance and save the battery power.
If the test line contacts badly and the current cannot reach the set value, the
instrument will stop testing and alarm.
Test grounding
In live environment, it is necessary to ensure that one end of the sample
has been grounded.
Intelligent Power Management
When the instrument is not operated for a long time, it shuts down
automatically to save electricity; the instrument has low charge prompt
function and over-discharge protection function.
Instructions for use of printer
The key of the printer and the indicator of the printer are integrated. When
the printer is powered on, the indicator light is normally on, and it flashes
when the paper is missing. Press the button once and the printer passes
the paper.

6
Printer change paper: take out the rotating spanner and open the paper
cover; Load the printer paper and pull out a piece of printer paper (tear the
teeth out a little bit). Close the cover and press the print head to the print
head. Press the print head back to the print head with a bit of force.
Operation instruction
After all the test wires are connected, turn on the power switch and enter
the "main menu" screen after the instrument is initialized, as shown in the
figure below.
No.
Instruction
1
Display date and time.
2
Displays the peripheral and current operation status
This icon is displayed when you insert a USB drive.
This icon is displayed when the printer is inserted.
This icon is displayed when a Bluetooth device is connected.
This icon is displayed when storing information queries.
This icon is displayed when instrument temperature is too high.
3
Instrument power display, low power when this icon flashes.
No.
Instruction
4
In the main menu operation area of the instrument, the corresponding
function is selected by the direction key, and the corresponding function
menu is entered by pressing the "Enter" key.
Circuit resistance test is carried out for low resistance test products such as
switch contacts
Query saved in the process of testing data; In the interface can detect data
printing and archived USB flash drive operation.

7
Set date and time of the instrument.
Need a password operation, it is not open to the user
5
SV：Display software current version number；
HV：Display hardware current version number.
Select "Circuit Test" and press "Enter" to enter "Circuit Test" screen, as shown below.
No.
Instruction
1
Parameter setting area. Select these parameters through the “←”→” key.
When these parameters are selected, press the “↑”↓”key to modify the
corresponding parameters.
To modify the number, press the "Enter" key to enter the modification state,
press the “←”→” key to move the cursor, press the “↑”↓” key to modify,
and press the "Enter" or "cancel" key to complete the modification.
In the "current" or "time" option, press the "Enter" button to quickly jump
the cursor to the button to start measurement.
4
3
2
1

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Current
The output current of this test can be set at 30A/50A/80A/100A.
If the circuit resistance exceeds the range of the corresponding gear
measurement, the current may not reach the set current. The low
resistance test line matched with the instrument should be used in the test,
and the connecting pole should be tightened and the test clamp clamped to
reduce the lead resistance.
Time
Setting the test time of this test, you can choose "Quick or
"10/20/30/40/50/60 seconds".
"Quick": Quick test after startup and display data after measurement.
"10-60 seconds": stop the test after the start-up time reaches the set time.
During the test process, you can press the "Enter" key or "cancel" key to
stop the test at any time.
Tip: "quick" measurements are recommended to save battery power
No.
Set the sample number of this test.
2
The main display area shows the measured circuit resistance. The
minimum resolution is 0.1μΩ, the display digit is 4.5 bits, and the
unitμΩ/mΩis switched automatically.
No.
Instruction
3
The sub-display area shows the voltage value and current value of the
tested product and the test time.
U
I
t
Displays the voltage between U+/U-and automatically switches unit mV/V.
Display the current between I+/I-and switch the unit mA/A automatically.
Displays the actual test time, in seconds.
4
When the cursor is here, press the "Enter" button to start the measurement.
In the process of testing, if the instrument detects the bad contact fault of
the test line, it pops up the fault alarm box and stops measuring.
If the instrument detects that the internal temperature is too high, a fault
alarm box will pop up, but the measurement will not stop.
The "Test Results" screen is shown below. Press the left and right key to move
the cursor and press the “Enter” key to perform the selected operation.

9
No.
Instruction
Continue to measure the circuit resistance according to the current setting
parameters.
Print the current test results by connecting the external printer.
Save the current test results to the local computer or save it to the external
USB disk.
Tip: the data saved to the USB is in WORD format, and can be directly
edited or printed with OFFICE.