Unit UTR2810E Series User manual

UTR2810E Series
LCR Meter
User Manual
www.uni-trend.com

UTR2810E Series LCR Meter –User Manual
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Preface
Thank you for purchasing this 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-T products are protected by patent rights in China and other countries, including issued and pending patents. Uni-
Trend reserves the rights to any product specification and pricing changes.
Uni-Trend Technology (China) Co., Ltd. all rights reserved. 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.
UNI-T is the registered trademark of Uni-Trend Technology (China) Co., Ltd.
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 UNl-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-T reserves 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 individual or entity that is declared
in the guarantee. In order 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 designated maintenance center of UNI-T, pay the shipping cost, and provide a copy of
the purchase receipt of the original purchaser. If the products is shipped domestically to the purchase receipt of the original
purchaser. If the product is shipped 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 allshipping, duties, taxes, and any other expenses.
Guarantee Limit
This warranty shall not apply to 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. Any maintenance 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
and its 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.

UTR2810E Series LCR Meter –User Manual
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Safety Instructions
Warning Danger：To avoid possible electric shock and personal safety problem, please follow the
instructions below.
Disclaimer
Please read the following safety information carefully beforestarting 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.
Operating Voltage
Ensure that the operating voltage of the electric supply does not exceed 10%
of the rated range, to avoid dangerous damage to the instrument.
Instrument Connecting line
Select the proper electirc wire to connect the load and the power under test,
make sure the the capacity of the wires can withstand the maximum short-
circuit current without overheating.
Input Voltage
Before connecting the device, observe all marks on the instrument. The
instrument supports AC110V and 220V input. Before turning on the power
supply, check whether the conversion switch of the programmable voltage
tester matches the input power supply and ensure that the fuse is installed
properly. Otherwise, the programmable voltage tester may be damaged.
DO NOT
use the instrument in an
explosive atmosphere
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 outer shell of the
instruement
Non-professional maintenance personnel should not open the outer shell 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.
It’s strictly prohibited that connect the instrument to life support system or any
other equipment with safety requirements.
DO NOT
install substitutes or perform
unauthorized changes
To ensure the safety of programmable pressure tester, please do not install
substitute parts or perform any unauthorized modifications.
To avoid risks, do not use the instrument when the cover is removed or
loose.

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Safety Symbol
Direct current
Null line or central line
Alternating current
Live line
Both direct and
alternating current
Power on
Three phase alternatin
Power off
Grounding
Backup power
Protective grounding
Ground terminal for
chassis
Signal grounding
Warning
Danger
Environment-Friendly Use Period (EFUP)
This product contains certain hazardous substances and can be used
safely during its environmental-friendly use period (EFUP) of 40 years,
as shown in the symbol on the left. If the specified time is exceeded, the
product should be recovered.
Waste Electrical and Electronic Equipment (WEEE) Instruction 2002/96/EC
Do not dispose the product and its accessories in trash bin.
If the following abnormal conditions occurs, please terminate the operation and disconnect the power cable immediately.
Contact the sales department of UNI-T for repair immediately. Failure to do so will result in fire or potential electrocution
hazard to operators.
The instrument is abnormal operation.
Abnormal noise, smell, smoke or flash occurs during operating the instrument.
During operation, the instrument generates high temperature or electric shock.
Power line, switch or socket is damaged.
An impurity or liquid flows into the instrument

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Table of Contents
Preface..............................................................................................................................................................................2
Copyright Information........................................................................................................................................................2
Warranty Service...............................................................................................................................................................2
Guarantee Limit ................................................................................................................................................................2
Safety Instructions.............................................................................................................................................................3
Table of Contents..............................................................................................................................................................5
Before Use......................................................................................................................................................................7
1.1 Out of BoxAudit..........................................................................................................................................................7
1.2 Requirements of Power Supply...................................................................................................................................7
1.3 Choice of Power and Fuse..........................................................................................................................................7
1.4 Operating Environment ...............................................................................................................................................8
1.5 Kelvin Clips or Test Fixtures........................................................................................................................................8
1.6 Preheat and Continous Operating Hour......................................................................................................................8
1.7 Other Characteristics ..................................................................................................................................................8
Introduction of Panel.....................................................................................................................................................9
2.1 Front Panel .................................................................................................................................................................9
2.2 Rear Panel..................................................................................................................................................................9
2.3 Display Area..............................................................................................................................................................11
Operating Instruction ..................................................................................................................................................13
3.1 Boot up......................................................................................................................................................................13
3.2 Measurement Parameter Setting ..............................................................................................................................13
3.2.1 Parameter A/B.................................................................................................................................................13
3.2.2 Frequency.......................................................................................................................................................14
3.2.3 Electrical Level................................................................................................................................................14
3.2.4 Speed .............................................................................................................................................................14
3.2.5 Range .............................................................................................................................................................15
3.2.6 Internal Resistance.........................................................................................................................................15
3.2.7 Mode...............................................................................................................................................................15
3.2.8 Clear...............................................................................................................................................................16
3.2.9 Trigger Setup ..................................................................................................................................................18
3.3 System Setup............................................................................................................................................................18
3 .3.1 Communication Mode .......................................................................................................................................18
3.3.2 Baud Rate ........................................................................................................................................................18
3.3.3 Qualified Beeper.............................................................................................................................................19
3.3.4 Unqualified Beeper .........................................................................................................................................19
3.3.5 Key Sound ......................................................................................................................................................19
3.3.6 LANGUAGE....................................................................................................................................................19
3.3.7 Default Setting ................................................................................................................................................19
3.3.8 Auto LCR.........................................................................................................................................................19
3.3.9 Save Setting....................................................................................................................................................19
3.3.10 View System Information ..............................................................................................................................20
3.4 Sorting Setup ............................................................................................................................................................20
3.4.1 Parameter A/B Setup ......................................................................................................................................20

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3.4.2 Nominal Value Setup.......................................................................................................................................20
3.4.3 Comparison Function......................................................................................................................................20
3.4.4 Comparison Mode...........................................................................................................................................21
3.4.5 【Upper Limit】,【Lower Limit】 Parameter Setting ..........................................................................................21
4. Instruction of Handler Interface......................................................................................................................................22
4.1 Brief Introduction.......................................................................................................................................................22
4.2 Operating Instruction.................................................................................................................................................22
4.2.1 Definition of signal line....................................................................................................................................22
4.2.2 Connection terminal and Signal......................................................................................................................23
4.2.3 Electrical Characteristic...................................................................................................................................24
5. RS232 Serial Interface......................................................................................................................................................26
5.1 Introduction of RS-232C Interface.............................................................................................................................26
5.2 UTR2810E Serial Interface .......................................................................................................................................26
5.3 Connect to Computer................................................................................................................................................27
5.4 Serial Port Parameter................................................................................................................................................27
5.5 Key Points of Programming ......................................................................................................................................27
5.6 End Character...........................................................................................................................................................28
5.7 SCPI Language.........................................................................................................................................................28
6. General Characteristic Index...........................................................................................................................................29
6.1 Measurment Parameter ............................................................................................................................................29
6.2 Equivalent Mode .......................................................................................................................................................29
6.3 Range .......................................................................................................................................................................30
6.4 Trigger Mode.............................................................................................................................................................30
6.5 Test Terminal Mode...................................................................................................................................................31
6.6 Test Speed................................................................................................................................................................31
6.7 Basic Accuracy..........................................................................................................................................................31
6.7.1 Maximum and Minimum Value of Measurement Parameter Affecting Accuracy.............................................32
6.7.2 Affecting Speed Error Factor ks......................................................................................................................32
6.7.3 Test Level Error Factor kv...............................................................................................................................32
6.7.4 Test Frequency Error Factor kf.......................................................................................................................32
6.7.5 Test Temperature Error Factor ke...................................................................................................................32
6.8 Test Signal Frequency...............................................................................................................................................32
6.9 Test Signal Level.......................................................................................................................................................32
6.10 Output Impedance...................................................................................................................................................33
6.11 Test Display Range..................................................................................................................................................33
6.12 Clear Function.........................................................................................................................................................33
6.13 Comparison Function..............................................................................................................................................33
6.14 Beeper ....................................................................................................................................................................33
6.15 Range Hold.............................................................................................................................................................33
6.16 RS232 Interface......................................................................................................................................................34
6.17 HANDLER Interface................................................................................................................................................34

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Before Use
Thank you for purchasing UNI-T product! Please read this chapter carefully before use. In
this chapter you will learn the following:
Out of box audit
Requirements of power supply
Choice of power supplu and fuse
Operating environment
Peform test clips
Preheat and continuous operating hours
Other characteristics
1.1 Out of Box Audit
Check with packing list to confirm that accessories has no loss. If there have any problem, please contact with our company.
No.
Components
Quantity
Remarks
1
LCR Meter
1
UTR2810E/UTR2811E
2
Power line
1
3
kelvin clips wire
1
4
RS-232 communication lie
1
Only for UTR2810E
5
Test fixtures
1
6
Short-circuit plate
1
1.2 Requirements of Power Supply
（1）voltage range：198V～242V or 99V～121V
（2）frequency range：47.5 Hz～63 Hz
（3）power range：≤20VA
（4）Power input phase wire L, zero line N, ground line E should be corresponding to the power plug
of the instrument.
（5）The instrument has designed to reduce waveform jamming caused by AC power input. However,
it should still be used in a low-noise environment as far as possible. If this cannot be avoided,
please install a power filter.
WARNING：To prevent electric shock, please connect the ground wire of the
power supply. If the powercable is replaced, ensure that the ground of the power
cable is properly connected.
1.3 Choice of Power and Fuse
Before connect the power supply, please confirm that the power switch is tured on and select the right input supply voltage.
The setting see Figure 1-1.
Figure1-1 The setting of input power
0.5Afast fuse is equip with the instrument, the user should use the fuse provided by our company or choose the fuse of the
same specification.

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1.4 Operating Environment
（1）Do not use the instrument in dust, shaking, direct sunlight and etchant gas environment.
（2）Please use the instrument in operating temperature 0℃～40℃，relative humidity ≤75%，to ensure the accuracy of
measurement
（3）The instrument has designed to reduce waveform jamming caused by AC power input. However, it should still be used
in a low-noise environment as far as possible. If this cannot be avoided, please install a power filter.
（4）If the instrument is not used for long time, please store it in an original packing box or a similar box in ventilated room
with temperature of 5℃～40℃and relative humidity less than 85%RH. The air should not contain harmful corrosion
and avoid direct sunlight.
（5）When the instrument connecting with the test object throught the testing wire, it should keep away from the strong
electromagnetic field to avoid interference to the measurement.。
1.5 Kelvin Clips or Test Fixtures
Please use the equipment test fixtures or test clips, the test fixtures or test clips made by user or other companies may
casuse incorrect measurement results. The test fixtures, test clips and the pins of the device under test should be kept
clean to ensure that the connecting in good condition.
Connect the test fixture or test clip to the four test ends of Hcur, Hpot, Lcur and Lpot on the front panel of the instrument.
For the object under test with a shielding shell, the shielding layer can be connected to the instrument "┴".
1.6 Preheat and Continous Operating Hour
In order to guarantee the accuracy of measurement, the preheating time should not less than 15 minute;
Operating hour should be less than 16 hours.
1.7 Other Characteristics
（1）Poewer Consumption：≤20VA
（2）Dimension（W*H*D）：88*174*275mm；
（3）Weight：about 2.5kg；

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Introduction of Panel
In this chapter you will learn the following：
Front Panel
Rear Panel
Display Area
2.1 Front Panel
The front panel of UTR2810E, see the Figure 2-1.
Figure 2-1 Front Panel
Table 2-1 Function description of front panel
2.2 Back Panel
The back panel of UTR2810E, see the Figure 2-2
No.
Function
Description
1
Brand and model name
Brand and model name of the instrument
2
LCD
Display the information of test result and condition
3
Rotary knob
Select and confirm
4
POWER switch
When the switch is on “1”, the power is enabled；
When the switch is on “0”, the power is disabled

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Figure 2-2 Back Panel
Table 2-2 Function description of panel
5
Test lead
Hcur：current excitation high-end
Hpot：voltage pressure high-end
Lpot：voltage pressure low-end
Lcur：current excitation low-end
6
Button
Direction key
ESC
Escape
Enter
Confirmed
CLEAR
Rest key（This version does not support REC ）
UTIL
The first function is UTIL
The second function is TOL
PARAA
Parameter selection A
PARA B
Parameter selection B
TRIGGER
Single measurement trigger key
SHIFT
Option key of the second function
No.
Function
Description
1
Handler interface
Through Handler interface to make up test system and achieve
automatic test. The instrument outputs the sub-file comparison
results, communication signal and obtains the "start" signal
through the interface.
2
RS232C serial interface
Serial communication interface
3
AC option switch
For switch 110/220V（Note the position of theAC switch when
connecting the power supply ）
4
Power spcket
For inputAC power (with fuse )
5
Ground lead
The grounding lead is connected with the instrument chassis. It
can be used to protect or shield the ground connection.

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2.3 Display Area
The UTR2810E display area is divided into the following parts, see Figure 2-3
Figure 2-3 Display Area
2.3.1 MEAS DISP
Dispaly Primary parameter Z/R/L/C/G /Y
Secondary paramter X/Q/D /R/Θ（deg）/Θ（rad）/B
2.3.2 SET DISP
(1) Paramter A
Z：Impedance value measurement
R：Resistance value measurement
L: Inductance value measurement
C：Capacitance value measurement
G: Conductance value measurement
Y: Admittance measurement
(2) Paramter B
X: Reactance measurement
Q：Quailty factor measurement
D：Loss value measurement
R：Resistance value measurement
Θ（rad）：Phase angle（arc）
Θ（deg）: Phase angle
B：Susceptance value measurement
(3) Frequency
100 Hz：The current measured signal frequency is 100 Hz.
120 Hz：The current measured signal frequency is 120 Hz.
1 kHz：The current measured signal frequency is 1 kHz.
10 kHz：The current measured signal frequency is 10 kHz.

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(4) Electrical level
0.1 V：The current measured signal voltage is 0.1 V.
0.3 V：The current measured signal voltage is 0.3 V.
1.0 V：The current measured signal voltage is 1.0 V.
(5) Speed
FAST：Fast speed test
MED：Medium speed test
SLOW：Slow speed test
(6) Range
AUTO：Automatic range
HOLD：3/10/30/100/300/1k/3k/10k/30k/100k/300k
(7) Internal Resistance
30Ω：signal source resistance is 30Ω.
100Ω：signal source resistance is 100Ω.
(8) Mode
SER：Series equivalent circuit
PAR：Parallel equivalent circuit
(9) Clear
ON: turn on
OFF: turn off
(10) Trigger Mode
INT: internal trigger
MAN: manual trigger
EXT: external trigger
BUS: bus trigger

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Operating Instruction
In this chapter you will learn the following：
Boot up
First function operating
Second function operating
3.1 Boot up
1）Press【POWER】key to boot up the instrument.
2）Enter test state after delay, see Figure 3-1, the actual situation may different.
Figure 3-1 Test Mode
3.2 Measurement Parameter Setting
Use【direction key】or【rotary knob】to move the cursor to the parameter to be test, press【rotary knob】or【ENTER】to
enter parameter setting, use【directionkey】or【rotary knob】to select the corresponding parameter, and then press 【rotary
knob】or【ENTER】to confirm the setting.
In addition, press 【PARA A】can quickly cursor location to parameter A, press 【PARA B】can quickly cursor location to
parameter B.
3.2.1 Parameter A/B
Classification
Function
Description
Parameter A
（primary
parameter）
L
Inductance value
C
Capacitance
R
Resistance value
Z
Impedance value
G
Conductance value
Y
Admittance value
D
Loss factor
Q
Quality factor

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Parameter B
（secondary
parameter）
Θ（deg）
Phase angle
Θ（rad）
Phase angle(arc)
B
Susceptance value
X
Reactance value
R
Resistance value
The UTR2810E/2811E can simultaneously measure two different parameter combinations of the measured impedance
in one test cycle. The primary and secondary parameters are as follows:
Z is positive value，L/C/R has positive and negative value.
When C measuring, the primary parameter display “-”，the actual device under test is inductive；
When L measuring, the primary parameter display “-”，the actual device under test is capacitive；
When R measuring，if R appears R “-”，it because over clear, please do clear operating correctly.
UTR2810E/2811E provides 42 measurement parameter combinations: primary and secondary parameter
Parameter A/B
combination
Description
L-Q
Simultaneous measure and display inductance value and quality factor
C-D
Simultaneous measure and display capacitance and loss factor
R-X
Simultaneous measure and display resistance and reactance value
Z-B
Simultaneous measure and display imoedance and susceptance value
Y-Θ（deg）
Simultaneous measure and display admittance value and phase angle
G-Θ（deg）
Simultaneous measure and display conductance value and phase angle (arc）
Y-R
Simultaneous measure and display conductance and resistance value
3.2.2 Frequency
UTR2810E/2811E provides 4 common test frequency：100 Hz，120 Hz，1 kHz 和10 kHz.
Frequency
Description
100 Hz
test frequency is 100Hz
120 Hz
test frequency is 120Hz
1 kHz
test frequency is 1 kHz
10 kHz
test frequency is 10 kHz
3.2.3 Electrical Level
UTR2810E/2811E provides 3 commin test signal voltage: 0.1V，0.3V and 1.0V. The current test signal voltage will
display in the the signal voltage indication area below the LCD.
Electrical
Level
Description
0.1V
Test signal voltage is 0.1V
0.3V
Test signal voltage is 0.3V
1.0V
Test signal voltage is 1.0V
3.2.4 Speed
UTR2810E/2811E provides three test mode FAST，MED and SLOW. In general, the slower the test speed, the more
stable and accurate the test results.
FAST: 43ms
MED: 185ms
SLOW: 350ms

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Speed
Description
FAST
About 23.3 times per second
MED
About 5.4 times per second
SLOW
About 2.8 times per second
3.2.5 Range
UTR2810E/2811E provides 12 range 3Ω，10Ω，30Ω，100Ω，300Ω，1kΩ，3 kΩ，10kΩ，30k，100kΩ, 300kΩ
and Auto. The effective measuring range of each range is shown below.
No.
Range
Effective measurement
range
0
300 kΩ
300kΩ-99.9999MΩ
1
100 kΩ
100kΩ-300kΩ
2
30 kΩ
30kΩ-100kΩ
3
10 kΩ
10kΩ-30kΩ
4
3kΩ
3kΩ-10kΩ
5
1kΩ
1kΩ-3kΩ
6
300Ω
300Ω-1kΩ
7
100Ω
100Ω-300Ω
8
30Ω
30Ω-100Ω
9
10Ω
10Ω-30Ω
10
3Ω
10uΩ-10Ω
11
Auto
10uΩ-99.9999MΩ
1. If the range is auto, the instrument will make range prediction at each measurement period, so
the test speed will be slower than the locking range. Change the range frequently will reduce
response. In general, automatic range is not suitable for sorting measurement.
The nominal rang is for sorting measurement.
2. The overload mark "----" will be displayed when the size of the test element exceeds the test
range or exceeds the display range of the instrument when the range is maintained.
3.2.6 Internal Resistance
UTR2810E/2811E provides 30Ω and 100Ω signal source internal resistance. In the same test voltage, select different
signal source internal resistance will get different test current. The test results will be different if the measured part is
sensitive to the test current. The instrument provides two kinds of different signal source internal resistance, which
can be convenient for users to compare the test results with other instrument manufacturers at home and abroad.
Internal Resistance
Description
30Ω
The current signal source internal resistance is 30Ω
100Ω
The current signal source internal resistance is 100Ω
3.2.7 Mode
UTR2810E/2811E can SER or PAR two equivalent circuit to measuring L, C, or R.
（1）The choice of capacitance equivalent circuit
Small capacity corresponds to high impedance value, and the influence of parallel resistance is greater than
series resistance. At this point the series resistance compared to the impedance of the capacitor is very small,
it can be negligible. Therefore, the parallel equivalent method should be selected for measurement.
On the contrary, large capacity corresponds to low impedance value, and the parallel resistance compared to
impedance of the capacitor is very large, it can be negligible. The influence of series resistance is greater than
parallel resistance. Therefore, the series equivalent method should be selected for measurement.
Generally speaking, capacitive equivalent circuits can select by the rule
When the choice is greater than 10kΩ, select parallel mode
When the choice is less than 10kΩ, select series mode

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Between the above impedance, use an appropriate equivalent circuit as recommended by the component
manufacturer.
（2）The choice of inductance equivalent circuit
Large inductance corresponds to high impedance value, and the influence of parallel resistance is greater
than series resistance. Therefore, the parallel equivalent method is more suitable for measurement.
On the contrary, small inductance corresponds to low impedance value, the influence of the series resistance
to inductance is more important. Therefore, the series equivalent method is more suitable for measurement.
Generally speaking, inductance equivalent circuits can select by the rule
When the choice is greater than 10kΩ, select parallel mode
When the choice is less than 10kΩ, select series mode
Between the above impedance, use an appropriate equivalent circuit as recommended by the component
manufacturer.
Mode
Description
SER
Series equivalent circuit
PAR
Parllel equivalent circuit
3.2.8 Clear
UTR2810E/2811E open-circuit clearing function can eliminate the influence of stray capacitance and stray
admittance (G,B) in parallel with the measured component;The short circuit clearing function eliminates the influence
of residual impedance, such as lead resistance or lead inductance in series with the measured component.
Function Key
Function
OFF
Turn off
ON
Turn on
Set【Clear】to ON, the test result is the data after zero clearing；Set it to off, the test result is the data before zero clearing.
Method of Zero Clearing
Open-circuit zero clearing
Step 1
Press【CLEAR】key to enter zero clearing interface；
Step 2
LCD displays information“keep fixture open”；
Step 3
Press【ENTER】key to execute open-circuit zero clearing. LCD displays information “open-circuit
clear is processing’；the instrument will automatically scans open - circuit zero clearing test for
each range;
Step 4
After that, LCD displays information “press ESC exit；press CLEAR continue”; press【CLEAR】to
continuing to zero clearing; This step is completed, which means open-circuit zero clearing is

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completed. It can be escape or continue the short-circuit zero clearing test.
Step 5
LCD displays information “keep fixture short”；If the instrument need to doshort circuit zeroclearing,
connect the short-circuit plate to the test fixture, or connect the test wire black clip and red clip
together;
Step 6
Press【ENTER】key to start the short circuit zero clearing. LCD displays information “short-circuit
clear is processing”；the instrument will automatically scan short circuit zero clearing test for each
range;
Step 7
After that, LCD displays" press ESC EXIT；press CLEAR continue”. This step is completed, which
means short circuit zero clearing is completed. It can be escape or continue the open-circuit zero
clearing test again.
1）After the instrument the zero clearing is done, the test condition is changed (replace test fixture,
test clip, temperature and humidity environment), the instrument should do zero clearing again.
2）During zero clearing, press【ESC】key to escape the current test and return the test state, the
original zero clearing data remains unchanged.
3）During short zero clearing, it may occasionally occur “FAIL”，in this case, the low resistance
short circuit （the test wire clip or the short-circuit plate）may not be used or the contact is not

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reliable. It should connect to short circuit and then perform the zero clearing again.
4）Zero clearing data will store in nonvolatile memory. Under the same test conditions, the
instrument does not need to zero clear.
5）The instrument will automatically select open-circuit or short circuit zero clearing. "QUIT" will be
displayed in the display area if there are components on the test terminal or the instrument is in
faulty.
3.2.9 Trigger Setup
UTR2810E/2811E have four trigger modes：INT、MAN、EXT and BUS.
Trigger
Mode
Description
INT
Internal trigger mode is also called continuous test. Trigger signal will continuous test by the
instrument accordance with the inherent period.
MAN
Manula trigger mode, each time【TRIGGER】key is pressed，the instrument will perform
a test period and it will be in a waiting state at othe times.
EXT
External trigger mode, when the instrument received a rising edge pulse from Handler
interface on the back panel, the instrument will perform a test period and it will be in a waiting
state at othe times. Please refer to Handler interface.
BUS
Bus trigger mode, when the instrument received RS232 trigger command, the instrument will
perform a test period and it will be in a waiting state at other times. Press ESC to exit.
3.3 System Setup
Press 【UTIL】key to enter system setup interface, setting method is the similar to measurement parameter setting.
Figure 3-2 System Setting
3 .3.1 Communication Mode
UTR2810E provides RS232 communication interface to communicate with PC，all panel key function can be used and
inquire the test state and sampling test result of the instrument through this interface. (UTR2811E can’t support this setting
because it does not contain RS232 interface.)
3.3.2 Baud Rate
Baud rate is the data transmission rate on the RS232 communication bus. UTR2810E supports five common baud rates：
9600bps，38400bps，57600bps，115200bps. (UTR2811E can’t support this setting because it does not contain RS232
interface.)

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Baud Rate
Description
1200
Tramsmit data 1200 bits per second
9600
Tramsmit data 9600 bits per second
38400
Tramsmit data 38400 bits per second
57600
Tramsmit data 57600 bits per second
115200
Tramsmit data 115200 bits per second
3.3.3 Qualified Beeper
UTR2810E/2811E can set the qualified beeper.
Qualified Beeper
Description
ON
Turn on
OFF
Turn off
3.3.4 Unqualified Beeper
UTR2810E/2811E can set the unqualified beeper.
Unqualified Beeper
Description
ON
Turn on
OFF
Turn off
3.3.5 Key Sound
UTR2810E/2811E can set the key sound.
Key Sound
Description
ON
Turn on
OFF
Turn off
3.3.6 LANGUAGE
UTR2810E/2811E can set the language.
LANGUAGE
Description
Chinese
Display Chinese interface
ENGLISH
Display English interface
3.3.7 Default Setting
The default setting of UTR2810E/2811E，this setting can return to the factory setting (only for system setting).
3.3.8 Auto LCR
Auto LCR setup of UTR2810E/2811E is an automatic component identification function. According to the property of
components to auto select inductance, capacity or resistance parameters to display.
The inductance parameter is automatically set to L-Q;
The capacitor parameter is automatically set to C-D;
The resistance parameter is automatically set to R-X.
Auto LCR
Description
ON
Turn on
OFF
Turn off
3.3.9 Save Setting
Save setting of UTR2810E/2811E, after this function is turned on, the measurement setting parameters will be automatically
called next boot; System configuration parameter；Data and setup of sorting setting.

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Save Setting
Description
ON
Turn on auto save
OFF
Turn off auto save
3.3.10 View System Information
After view the system information, press【ENTER】or【ESC】to exit the system information interface.
3.4 Sorting Setup
Deviation mode is used to control the display way of the result, deviation display is to show the difference between measured
value and reference value. It is used for observing test result with different test conditions or environmental conditions. And it
can also be used to observing the test result when sorting the measurement (set the deviation display mode and deviation
reference to consistent with the deviation tolerances mode and the nominal value).
Press【Shift】and then press【UTIL】to enter sorting setting, the setting method is the same with measurement parameter
setting.
Figure 3-3 Sorting Interface
Figure 3-4 Sorting Result
3.4.1 Parameter A/B Setup
Set parameter A/B of UTR2810E/2811E in the main interface, it will keep the settings.
3.4.2 Nominal Value Setup
The nominal value of primary parameter of UTR2810E/2811E can separate set and save.
3.4.3 Comparison Function
The inner comparison of UTR2810E/2811E are allowed to set 3 sets of the limit of primary parameter and 1 set of the limit
of secondary parameter. The measured element can be divided into 5 levels (NG, BIN1, BIN2, BIN3 and AUX).When the
primary parameter use the comparison function, it should turn on 【Comparsion】switch, this function is only charge for
the sorting judgement of primary parameter; When the secondary parameter use comparison function, it should turn on
【Auxiliary】switch, this function is only charge for the sorting judgement of secondary parameter.