Unit UT3500 Series User manual

UT3500 Series
Battery Internal Resistance
Tester
User Manual
www.uni-trend.com

UT3500 series User Manual
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Preface
Thank you for purchasing this brand new product. In order to use this product safely and
correctly, please read this manual thoroughly, especially the safety notes.
After reading this manual, it is recommended to keep the manual at an easily accessible
place preferably close to the device, for future reference.
Copyright Information
Uni-Trend Technology (China) Co., Ltd. all rights reserved.
UNI-T is the registered trademark of Uni-Trend Technology (China) Co., Ltd.
UNI-T products are protected by patent rights in China and other countries, including
issued and pending patents. Uni-Trend reserves the rights to anyproduct specification and
pricing changes.
Uni-Trend reserves all rights. Information in this manual supersedes all previously
published versions. No part of this manual may be copied, extracted or translated by any
means without the prior permission of Uni-Trend.
Warranty Service
The instrument has a warranty period of one year from the date of purchase. If the
instrument is damaged due to improper operation by the user during the warranty period,
the maintenance fee and the costs caused by the maintenance shall be borne by the user,
and the instrument shall be maintained by the company for life.
If the original purchaser sells or transfers the product to a third party within one year from
the date of purchase of the product, the warranty period of one year shall be from the date
of the original purchase from UNI-T or an authorized UNI-T distributor. Power cords,
accessories and fuses, etc. are not included in this warranty.
If the product is proved to be defective within the warranty period, UNI-Treserves the rights
to either repair the defective product without charging of parts and labor, or exchange the
defected product to a working equivalent product (determined by UNI-T). Replacement
parts, modules and products may be brand new, or perform at the same specifications as
brand new products.All original parts, modules, or products which were defective become
the property of UNI-T.
The “customer” refers to the individual or entity that is declared in the guarantee. In order
to obtain the warranty service, "customer" must inform the defects within the applicable
warranty period to UNI-T, and perform appropriate arrangements for the warranty service.
The customer shall be responsible for packing and shipping the defective products to the

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designated maintenance center of UNI-T, pay the shipping cost, and provide a copy of the
purchase receipt of the original purchaser. If the product is shipped domestically to the
location of the UNI-T service center, UNI-T shall pay the return shipping fee. If the product
is sent to any other location, the customer shall be responsible for all shipping, duties,
taxes, and any other expenses.
Guarantee Limit
This warrantyshall not applyto any defects,malfunction or damages caused by accidental,
machine parts’wear and tear, using outside the product’s specifications, improper use, and
improper or lacking of maintenance. UNI-T under the provisions of this warranty has no
obligation to provide the following services:
a) Any repair damage caused by the installation, repair, or maintenance of the product by
non UNI-T service representatives;
b) Any damage caused by improper use or connection to an incompatible device;
c) Any damage or malfunction caused by the use of a power source not provided by UNI-
T;
d) Anymaintenance on altered or integrated products (if such alteration or integration leads
to an increase in time or difficulty of product maintenance).
This warranty is written by UNI-T for this product and it is used to substitute any other
express or implied warranties. UNI-T andits distributors do not offer any implied warranties
for merchantability or applicability purposes. For violation of this guarantee, UNI-T is
responsible for the repair or replacement of defective products as the only and complete
remedy available to customers. Regardless of whether UNI-T and its distributors are
informed that any indirect, special, incidental, or consequential damage may occur, the
UNI-T and its distributors shall not be responsible for any of these damages.
Safety Information
Warning Danger: To avoid possible electric shock and personal safety problem,
please follow the instructions below.
Disclaimer:
Please read the following safety information carefully before starting to use the instrument.
Uni-Trend will not be responsible for the personal safety and property damage caused by
the user's failure to comply with the following terms.
Instrument Grounding:
To prevent the risk of electric shock, please connect the power ground wire.
Do not use the instrument in an explosive atmosphere:

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Do not use the instrument in flammable and explosive gas, steam or dusty environment.
The use of any electronic equipment in such an environment is a risk to personal safety.
Do not open the housing of the instrument:
Non-professional maintenance personnel should not open the housing of the instrument to
try to repair the instrument. The undischarged charge still exists for a period of time after
the instrument is turned off, which may cause electric shock.
Do not use instruments that work abnormally:
If the instrument does not work properly and its danger is unpredictable, please disconnect
the power cord, do not use it, and do not try to repair it yourself.
Do not use the instrument beyond the way specified in this user manual:
If it exceeds the range, the protective measures provided by the instrument will become
invalid.
Warning:
1. For the instrument model UT3562, do not apply AC voltage and DC voltage
exceeding 100V to the test terminal, otherwise the instrument will be
damaged.
2. For the instrument model UT3563, do not apply AC voltage and DC voltage
exceeding 400V to the test terminal, otherwise the instrument will be
damaged.
Environmental Protection Use Period Sign:
This symbol means that within the indicated time, hazardous or toxic
substances will not leak or be damaged. The product's environmental
protection use period is 40 years. During this period, it can be used with
confidence.After the specified time, it should enter the recycling system.
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
must not be discarded in the trash can

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Table of Contents
Preface..............................................................................................................................................2
Copyright Information......................................................................................................................2
Warranty Service ..............................................................................................................................2
Guarantee Limit................................................................................................................................3
Safety Information............................................................................................................................3
1. Product Overview.........................................................................................................................8
1.1 Product Series .....................................................................................................................8
1.1.1 Features of Product Series .......................................................................................8
1.1.2 Main Functions of the Product.................................................................................9
1.2 Front Panel ......................................................................................................................10
1.2.1 Description of the Front Panel ...............................................................................10
1.3 Rear Panel .........................................................................................................................12
2. Inspection and Installation.........................................................................................................13
2.1 Packing List........................................................................................................................13
2.2 Requirements of Power Supply.........................................................................................14
2.3 Operating Environment.....................................................................................................14
2.4 Cleaning.............................................................................................................................14
2.5 Handle of Instrument........................................................................................................14
3. Preparation before Measurement ...........................................................................................15
3.1 Power on and Run.............................................................................................................15
3.1.1 Power on and off....................................................................................................15
3.2 Connection of Test Terminals ............................................................................................16
3.2.1 Introduction of Test Lead .......................................................................................16
3.2.2 Connection of Test Lead.........................................................................................16
3.3 Measurement Method of DUT..........................................................................................17
3.4 Set Zero and Calibrate.......................................................................................................18
3.4.1 Short-Circuit Test Leads..........................................................................................19
3.4.2 Set Zero ..................................................................................................................21
4. [Test] Measurement Page ..........................................................................................................22
4.1 <Test> Page........................................................................................................................22
4.1.1 [Trigger]..................................................................................................................22
4.1.2 [Function]...............................................................................................................23
4.1.3 [R-Range]................................................................................................................23
4.1.4 [V-Range]................................................................................................................24
4.1.5 [Speed] ...................................................................................................................25

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4.2 Manual Save and View Data..............................................................................................25
4.3 Screen Capture Function...................................................................................................26
5. [Setup] Setting............................................................................................................................27
5.1 Parameters of Measurement ............................................................................................27
5.1.1 [Average] Times......................................................................................................27
5.1.2 Trigger [Delay] ........................................................................................................27
5.1.3 [Self-Calibration] Switch.........................................................................................28
5.1.4 Measurement [Current] Output Mode ..................................................................28
5.2 Catalog ..............................................................................................................................29
5.2.1 [Auto Recall]...........................................................................................................29
5.2.2 [Auto Save].............................................................................................................29
5.2.3 [File 0] ~ [File 9]......................................................................................................30
6. Log/Stat ......................................................................................................................................30
6.1 Data Log ............................................................................................................................30
6.1.1 Enable Log Function...............................................................................................30
6.1.2 Save Data................................................................................................................31
6.2 Stat ....................................................................................................................................33
6.2.1 Process Capability Index.........................................................................................33
6.2.2 Turn on the Stat Function.......................................................................................34
6.2.3 Save Data to U Disk ................................................................................................35
7. Comparator Sorting....................................................................................................................36
7.1 Comparator Setting...........................................................................................................36
7.1.1 [Beep] Setting.........................................................................................................36
7.1.2 Comparison Mode Selection..................................................................................37
7.1.3 [Nominal Value] Input ............................................................................................37
7.1.4 [Lower] and [Upper] Setting...................................................................................37
7.2 Display and Discrimination................................................................................................38
7.2.1 Display after Opening the Comparator ..................................................................38
7.2.2 Example of Qualified Discrimination......................................................................39
7.2.3 Example of Unqualified Discrimination..................................................................39
8. System Configuration .................................................................................................................40
8.1 System Configuration Settings ..........................................................................................40
8.1.1 [LANGUAGE] Setting...............................................................................................40
8.1.2 [Key Beep] Setting..................................................................................................41
8.1.3 Date and Time Setting............................................................................................41
8.1.4 Account Setting ......................................................................................................41
8.1.5 [Remote Communication] Setting..........................................................................42
8.1.6 [Baud] Setting.........................................................................................................42
8.1.7 [Communication Protocol] Setting.........................................................................43
8.1.8 Modbus [Address] Selection ..................................................................................43

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8.1.9 [End Mark], [Hand Shake], [Error Code] Setting.....................................................43
8.1.10 SCPI [Upload] Mode .............................................................................................45
8.1.11 [Log] and [Stat].....................................................................................................45
8.1.12 [Filter] Selection...................................................................................................45
8.1.13 [Default Setting] ...................................................................................................45
8.2 System Info........................................................................................................................46
8.3 System Service...................................................................................................................46
9. Handler Interface........................................................................................................................47
9.1 Terminals and Signals........................................................................................................47
9.2 Connection Mode..............................................................................................................48
9.2.1 Use Internal Power Supply .....................................................................................48
9.2.2 Electrical Parameters..............................................................................................48
9.2.3 Schematic Diagram of the Input Terminal..............................................................49
9.2.4 Schematic Diagram of the Output Terminal...........................................................49
9.2.5 Connection Method of the Input Circuit................................................................49
9.2.6 Connection Method of the Output Circuit.............................................................50
9.3 Periodic Table....................................................................................................................52
10. Remote Communication ..........................................................................................................52
10.1 RS-232C ...........................................................................................................................53
10.1.1 RS232C Interface ..................................................................................................54
10.1.2 Connection Mode.................................................................................................54
10.2 RS485 Interface ...............................................................................................................54
10.3 USB Interface...................................................................................................................55
10.4 Communication Protocol ................................................................................................56
11. Technical Index .........................................................................................................................57
11.1 Technical Index of the Product........................................................................................57
11.2 Environmental Requirements..........................................................................................59

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1. Product Overview
Thank you for purchasing the Uni-Trend battery internal resistance tester. This chapter
mainly covers the following:
Features and Functions of Product Series
Front Panel
Rear Panel
1.1 Product Series
UT3500 series battery internal resistance tester contains twomodels:UT3562and UT3563,
the measurement voltage range of which is 100V and 400V respectively. The
measurement accuracy is shown in the table below, and the complete technical
specifications can be found in the last chapter.
Model
Accuracy
Measurement Range
UT3562
Resistance: 0.5%
Resistance: 0.0001mΩ~3.2kΩ
Voltage: 0.01%
Voltage: 0.00001~101.000V
UT3563
Resistance: 0.5%
Resistance: 0.0001mΩ~3.2kΩ
Voltage: 0.01%
Voltage: 0.00001~404.000V
1.1.1 Features of Product Series
4.3 inch large screen and LCD display, the battery internal resistance and the voltage
can be displayed at the same time.
It can test resistance ranges from 0.0001mΩ~3.2kΩ, and can measure high voltage
battery pack up to 400V (UT3563).
With measurement characteristics including high precision, high resolution and ultra-
high-speed, it provides 0.5% resistance accuracy and 0.01% voltage accuracy. The
maximum measurement speed can reach 65 times per second, which improves the
efficiency of mass production inspection of small batteries.
It configures general data acquisition software according to the standards, so it can
read the test data to the computer, and record these data in the general form software
and CSV file. It is suitable for time interval measurement and manual measurement
using trigger keys and external triggers. It can be effectively used for remote control,
data acquisition and data analysis.

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It can be used for professional sorting function, independent comparison function of
resistance and voltage, and judgment of HI/IN/LO. The judgment result can be
displayed on the screen, buzzer, and external I/O output. It can automatically judge
whether the battery parameters meet the standards and count the pass rate, which is
suitable for the detection and sorting of various batteries.
The instrument uses an enhanced command for computer remote control which is
compatible with SCPl (Standard Command for Programmable Instrument) and can
efficiently complete remote control and data acquisition function.
The instrument is used for battery internal resistance test, including battery module
inspection, battery R&D measurement, high-voltage battery pack inspection, lithium
battery, lead-acid battery, button battery and other high-speed mass production line
inspections.
1.1.2 Main Functions of the Product
Function
UT3562
UT3563
Measurement Range
Voltage Range: 0.00001~
101.000V, 3 Ranges
Voltage Range: 0.00001~
404.000V, 3 Ranges
Resistance Range: 0.0001mΩ~3.2kΩ, 7 Ranges
The modes of resistance and voltage range selection are
divided into automatic and manual.
Test Speed
The instrument has four test speeds: SLOW, MED,
FAST, and EXFAST. All channels are turned on, and the
test speeds in manual range mode are as follows:
SLOW: 3 Times/Second
MED: 14 Times/Second
FAST: 25 Times/Second
EXFAST: 65 Times/Second
Basic Accuracy
Resistance: 0.5% Voltage: 0.01%
Maximum Reading
Resistance: 31,000 Voltage: 606,000
Calibration
Short-Circuit and Set Zero
Comparator Sorting
Instrument Sorting Function:
R-HI/R-LO/R-IN Output: The Resistance Exceeds
the Upper Limit/Lower Limit/Compliance
V-HI/V-LO/V-IN Output: The Voltage Exceeds the
Upper Limit/Lower Limit/Compliance

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There are two sorting results: PASS and FAIL,
outputting in and symbols respectively.
Comparison Method:
Absolute value tolerance ±TOL sorting: The
absolute deviation of the measured value and the
nominal value is compared with the limits of each
range.
Percent tolerance ±TOL sorting: The percentage
deviation of the measured value and the nominal
value is compared with the limits of each range.
Direct reading comparison sorting: the measured
value is directly compared with the upper and lower
limits.
Beep: three options: OFF, PASS, FAIL.
Interface
RS-232/USB Remote Control:
It supports a baud rate up to 115200bps and is
compatible with SCPI protocol/Modbus.
Handler Interface: I/O port with full opto-coupler isolation
and built-in pull-up resistor. It supports internal 5V and
external maximum 35V power supply.
Input: trigger signal, output: all sorting comparison result
signals; measurement synchronization signal (EOC);
high current drive output, direct drive relay.
Test Frequency
1kHz, Frequency Stability: 20ppm
Test Terminal
Four Terminal Method
Trigger Mode
INT and EXT (including manual and remote trigger)
Communication Protocol
SCPI and Modbus (RTU)

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1.2 Front Panel
1.2.1 Description of the Front Panel
Figure 1-2-1 Front Panel, Take UT3563 as an Example
Serial Number
Picture
Description of Function
1
Power switch (touch switch); When the power supply
is ON, the button light is yellow. When OFF, it is red.
2
The function keys F1~F6: According to the menu
displayed on the screen, the function of the keys will
change.
3
4 test terminals, SOURCE (measuring terminal) and
SENSE (sensing terminal)
4
The test key is used to display the result of the
measurement object (internal resistance, voltage),
etc.
The setup key is used to set measurement parameter
configuration.
The key LOCK can disable other keys. Long press for
1s to unlock.
5
The numeric keyboard: The number keys are used to
enter numeric values; the plus,minus, and delete key
is used to enter and delete plus and minus signs.
6
The cursor keys are used to move the cursor up and
down, left and right.
①It is used to confirm the value entered by the
numeric keyboard.

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②When inserting the U disk, the screen image can
be captured and saved.
The esc key: It is used to cancel/return.
The trigger key is used to trigger a measurement
when the trigger source is external.
7
U disk interface
8
4.3 inch LCD display window
Table 1-2-2 Introduction of Interface Display Symbols (the following symbols will
be displayed on the tester screen interface)
Description
It means that the U disk has been inserted into the
instrument and can save data or screenshots.
The beep function turns on.
The comparator turns on.
The key lock turns on.
No measured value is displayed. The test lead and the
object under test are not effectively connected to form a
measurement.
When the measurement interface displays OL, it means
that the measured value is out of the range.
It means that the measured value meets the required
setting range of the comparator.
It means that the measured value exceeds the required
setting range of the comparator.
It means that the measured value is lower than the
required setting range of the comparator.
The symbol means that the measurement result is
judged as unqualified after setting the comparator.
The symbol means that the measurement result is
judged as qualified after setting the comparator.
The twinkling green cursor means that the instrument is
collecting data.
It is normal that the green cursor will always exist after
the instrument is turned on.

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1.3 Rear Panel
Figure 1-3-1 Rear Panel
1. AC power socket (without fuse, it is inside the instrument). The power supply’s voltage
and frequency are marked above the socket.
2. Ground Terminal
3. USB Communication Interface
4. RS-232C Interface
5. HANDLER Interface
2. Inspection and Installation
This chapter mainly covers the following:
Packing List
Requirements of Power Supply
Operating Environment
Cleaning
Handle of Instrument
2.1 Packing List
Before using the instrument, please first:
1. Check whether the appearance of the product is damaged, scratched or has other
defects;
2. Check whether the instrument accessories are missing according to the instrument
packing list.
If it is damaged or the accessories are missing, please contact Uni-Trend Instrument
Sales Department or the distributor immediately.

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Components
Quantity
Remarks
Battery Internal Resistance Tester
1
Power Cord
1
There are specified power cords for
different countries and regions.
UT-L80 Battery Internal Resistance
Test Pen
1
They are dedicated to all UT3500
series battery internal resistance
testers, including UT3562 and
UT3563.
UT-L82 Battery Internal Resistance
Kelvin Test Lead
1
Factory Qualified Report
1
Certificate of Conformity and
Warranty
1
User Manual
1
It is an electronic file which can
download from the official website.
2.2 Requirements of Power Supply
UT3500 series can only be used under the following power supply conditions:
Voltage: 100VAC~240VAC
Frequency: 50Hz~60Hz
Warning: In order to prevent the risk of electric shock, please connect the ground wire of
the power supply.
If the user replaces the power cord, please make sure that the ground wire of this power
cord is reliably connected.
2.3 Operating Environment
UT3500 series must be used under the following environmental conditions:
Temperature: 0℃~55℃
Humidity: less than 70%RH at 23℃
2.4 Cleaning
To prevent the risk of electric shock, please unplug the power cord before cleaning.
Please use a clean cloth dipped in clean water to clean the housing and panel.
Do not clean the inside of the instrument.
Note: Do not use solvents (alcohol or gasoline, etc.) to clean the instrument.

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2.5 Handle of Instrument
The handle of the instrument can be adjusted. Hold both sides of the handle at the same
time with hands, gently pull it to both sides, and then rotate the handle. The handle can be
adjusted to four positions, as shown in the figures below:
Figure 2-5-1 Original Position of Figure 2-5-2 Position of Instrument Handle
Instrument Handle in Test Status
Figure 2-5-3 Handle Removal Position Figure 2-5-4 Handle Lift Position

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3. Preparation before Measurement
This chapter mainly covers the following:
Power on and Run
Connection of Test Terminals
Measurement Method of DUT (Device under Test)
Set Zero and Calibrate
3.1 Power on and Run
3.1.1 Power on and off
Connect the power cord in standard accessories to ensure that the instrument is normally
powered.
Turn on the power switch with the symbol at the bottom left of the panel. This power
switch is a light touch electronic switch. When the indicator light turns yellow, it indicates
that the power of the instrument is turned on.
After confirming that the instrument is powered on normally, please turn off the power
button. At this time, the indicator light is red, and then you can proceed to the next step:
the connection of the test lead and the instrument test terminals.
Warning:Pleasemakesurethat the powersupply voltage is consistent with the supply
voltage before turning on the power, otherwise the instrument will be burnt out. Please be
sure to connect the main power plug to a power socket with ground protection. Do not use
a wiring board without ground protection. Before operating the instrument, you should first
make sure that the instrument is well grounded.
3.2 Connection of Test Terminals
3.2.1 Introduction of Test Lead
UT3500 series battery internal resistance tester is equipped with UT-L80 crown probe test
pen and UT-L82 Kelvin test lead specially used for battery internal resistance test
according to the standards, which is convenient for users to measure more professionally.
At the same time, the product can be equipped with UT-L81 alligator clip test lead, and
users can contact salesmen to purchase it separately.
The relevant information of the test lead is as follows:

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Figure 3-2-1 A UT-L80 Battery Internal Resistance Test Pen-Crown Probe
(Standard Accessory)
Figure 3-2-1 B UT-L82 Battery Internal Resistance Kelvin Test Lead- Nipper Clip
(Standard Accessory)
Figure 3-2-1 CUT-L81 Battery Internal Resistance Test Lead- Alligator Clip
(Optional Accessory)
3.2.2 Connection of Test Lead
From the perspective of safety and test accuracy, it is recommended to use the standard
test lead for measurement. Before measurement, follow the steps below to connect the
test lead to the test terminals of the instrument.
1. Before connecting the test line, please make sure that the power switch of the
instrument is OFF.
2. Make sure there is no connection at the top of the test leads of the four terminals.
3. Connect the test leads of the four terminals to the input terminals of the instrument
according to the method shown in Figure 3-2-2. The specific operations are as
follows:
Connect the black test lead to the black terminal hole of the instrument and the red
test lead to the red terminal hole.
The ▲symbol of the black test lead must match the black SENSE hole on the front
panel of the instrument, and the ▲symbol of the red test lead must match the red
SENSE hole.
Red
Black
Red Crown Probe Test Pen
Black Crown Probe Test Pen
Red
Black
Red Nipper Clip
Black Nipper Clip
Red
Black
Red Alligator Clip
Black Alligator Clip

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Figure 3-2-2 Schematic Diagram of the Connection between the Test Lead and
the Terminal Hole of the Instrument (Take the UT3563 Panel as an Example)
The red test lead has onlyone side with the red ▲symbol, when it is correctly connected,
the red ▲symbol of the test lead should be exactly on the bottom of the test lead, so it is
not shown in the figure above. It is necessary to correctly connect the test lead to the test
hole of the instrument; otherwise it will affect the output of test results.
Note: In order to ensure the accuracy of the instrument, please use the attached test
lead for testing.
Warning: It is prohibited to connect the AC current source and voltage source directly
to the test terminals.
3.3 Measurement Method of DUT
After correctly connecting the test leads to the Sense and Source test terminals of the
instrument, please correctly connect the test leads to the DUT as follows. Note that the red
test pen or test clip should be connected to the positive electrode of the battery, and the
black test pen or test clip should be connected to the negative electrode. As shown in
Figure 3-3-1.
If the positive and negative poles of the terminal of the DUT are connected reversely, and
the test voltage value is negative, please exchange positions of the red and black test pens
or test clip.
Figure 3-3-1 Connect the Test Lead to the DUT

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If you are testing with an alligator clip, you can use the test lead to directly clamp the
terminal of the DUT for four-terminal testing.
If you are testing with a crown probe test pen, you can put the red and black test lead
probes against the corresponding positive and negative terminals of the DUT for four-
terminal testing, as shown in Figure 3-3-2.
Figure 3-3-2 Schematic Diagram of Crown Probe Test Pen Measurement
Note: When a negative voltage appears, it is caused by the reverse connection of the
test leads, and the positions of the red and black test pen need to be changed.
3.4 Set Zero and Calibrate
Before testing, please perform the short circuit zeroing step to remove the stray resistance
and bias voltage caused by the test lead or external environmental factors.
The measured resistance value may be very small, such as 3mΩ and 30mΩ range. When
the test currentflows through the resistance,the voltage signal generated will be very weak,
and the maximum is only a few mV, so the position, length and shape of the test lead may
all have effects on the measurement. Therefore,the positions and conditions during setting
zero should be the same as those during subsequent measurement.
Note: In order to ensure the accuracy of the measured value during setting zero and
normal measurement process, the test pen or test lead must be kept away from any metal
parts, instruments running on electricity or other environments with magnetic fields.
3.4.1 Short-Circuit Test Leads
Before setting zero, please short-circuit the test clip as follows.
Correct Short Circuit Method of the Alligator Clip
1. Hold an alligator clip in each hand, and press the upper handle of each alligator clip at
the same time, so that the red and black alligator clips are opened as shown in Figure
3-4-1.

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Figure 3-4-1 Alligator Clips Are Opened before Engaging
2. Asshown in Figure3-4-2,makethefirstrow of teethof oneofthe alligatorclipsproperly
engage with the first row of tooth recesses of the other alligator clip. The state after
proper engagement should be the same as Figure 3-4-3. The two alligator clips must
be on a horizontal line after being engaged.
3. It is necessary to ensure that the metal teeth of the two alligator clips are correctly
engaged before performing the next step of setting zero and calibrating.
Figure 3-4-2 Description of Alligator Clip Teeth Engagement
Figure 3-4-3 Parallel Status after the Red and Black Alligator Clips Are Engaged
Correct Short Circuit Method of the Crown Probe Test Pen
The center probe of the crown probe test pen is the Sense end, and the outer cylindrical
probe is the Source end.
First, place the probes of the crown probe test pen as shown in Figure 3-4-4-a. Make sure
that the surface of the object at the red dot is in contact, that is, the center probe is in
contact with the center probe (Sense and Sense), and the center probe is in contact with
the peripheral probe (Sense and Source).
Make the first rowof teeth of one of
the alligator clips properly engage
with the first row of tooth recesses
of the other alligator clip.