Unit UTE9802 User manual

UTE9802/9811
Digital Power Meter
User Manual
UTE9802
UTE9811

UTE9802/9811 Digital Power Meter
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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

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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 all shipping, 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.
Safety Instructions
To avoid possible electric shock and personal safety problem, please follow the instructions below. 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
1. Do not use the damaged instrument. Before using, please check the outer shell whether has crack or plastic
lack. Do not use the instrument in flammable and explosive gas, steam or dusty environment.
2. Only trained personnel can maintain procedure to avoid fire and personal injury; there must be personnel
supervision in use, otherwise it should be turned off the instrument and its power supply.
3. Before connecting the instrument, observe all marks on the instrument to learn more about the rated value,
warnings and notices.
4. The power supply of the instrument is 100-240VAC, 50/60Hz.
5. The instrument is equipped with three core power cord, only use the power cord provided by the manufacturer
to avoid accidental injury; do not plug and unplug the power cord when the instrument is energizing; do not
put other objects on the power cable when using it, and ensure that the power cable is away from heat source.
5. Instrument grounding：To prevent the risk of electric shock, please connect the power ground wire.

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6. Do not install substitutes or perform unauthorized changes; do not use the instrument when the outer shell
opened or looseness.
7. During the test, do not touch terminal blocks and test line to prevent from electric shock; do not hot plug the
communication port; do not put article on the instrument to protect the instrument, especially pay attention
not to let metal chips, water, oil and other liquids into the internal the interior of the instrument, otherwise, it
may cause unpredictable and serious consequences.
8. Avoid exposed circuits, do not touch exposed connectors and components after the power is turned on.
9. Use the appropriate fuse, only with the fuse type and rating indicator specified for this product.
10. Do not use instruments that work abnormally; if you suspect that the product has malfunctioned, let qualified
maintenance personnel to check the instrument.
11. Unplug the power cord from the power outlet if the instrument is not to be used for a long time. Please do
not pull the power cord to unplug it; if the instrument need to move, please make sure the power line and
other connecting line is pulled out and use the carrying handle on the side of the instrument, be gentle with
it to prevent collision.
Environmental Condition
UTE9802&UTE9811 series can only use indoors and non-condensing area, the general environmental
requirements shown as below table：
Environmental Condition
Operating Environment
5℃～40℃，20%～80%RH（non-condensing）
Accuracy guaranteed temperature and
humidity temperature
23℃±5℃，30%～75% R.H.
Storage temperature
-10℃～50℃, non-condensing below 80% R.H.
Operating altitude
≤2000 meter
Explanation：In order to ensure the measurement accuracy, it is recommended to start the operation after half
an hour of warm-up on the machine.

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Table of Contents
Chapter 1 Inspection and Installment.............................................................................................................................................. 6
1.1 Out of Box Audit.............................................................................................................................................................................. 6
1.2 Hand Shank....................................................................................................................................................................................... 6
Chapter 2 Introduction of Product....................................................................................................................................................7
2.1 Product Overview............................................................................................................................................................................ 7
2.2 Technical Specification..................................................................................................................................................................8
2.3 Front Panel ......................................................................................................................................................................................10
2.4 Digital and Character Display ...................................................................................................................................................12
2.5 Rear Panel........................................................................................................................................................................................13
Chapter 3 Operating Instruction and Measurement Display ..............................................................................................14
3.1 Before Use .......................................................................................................................................................................................14
3.1.1 Connecting Power Cable ...................................................................................................................................................14
3.1.2 Connecting Test Circuit......................................................................................................................................................14
3.1.3 Turn ON/OFF Power ............................................................................................................................................................15
3.1.4 Measurement.........................................................................................................................................................................15
3.2 Measurement Display..................................................................................................................................................................15
3.2.1 Window Display ....................................................................................................................................................................15
3.2.2 Data Hold ................................................................................................................................................................................16
3.2.3 Lock ...........................................................................................................................................................................................16
3.3 UTE9802 Measuring Mode........................................................................................................................................................16
3.3.1 AC Measuring Mode ...........................................................................................................................................................16
3.3.2 DC Measuring Mode ...........................................................................................................................................................16
3.3.3 AC+DC Measuring Mode ..................................................................................................................................................17
3.3.4 Measuring Mode Selection...............................................................................................................................................17
3.4 UTE9811 Measuring Mode........................................................................................................................................................17
3.4.1 Normal Measuring Mode ..................................................................................................................................................17
3.4.2 Harmonic Wave Measuring Mode .................................................................................................................................17
Chapter 4 SETUP Function...................................................................................................................................................................19
Chapter 5 RS232 Communication....................................................................................................................................................21
5.1 Overview...........................................................................................................................................................................................21
Chapter 6 Storage and Calibration..................................................................................................................................................22
6.1 Notice Matters of Storage .........................................................................................................................................................22
6.2 Trouble-shooting ..........................................................................................................................................................................22
6.3 Notice Matters of Calibration...................................................................................................................................................22
Chapter 7 Appendix ...............................................................................................................................................................................24
7.1 Optional Testing Wire .................................................................................................................................................................24
7.2 Specification of Fuse....................................................................................................................................................................25

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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.
Table 1.1 Packing List
No.
Components
Quantity
Remark
1
Digital power meter
1
UTE9802/UTE9811
2
Power cable
1
3
RS-232 communication line
1
Explanation：After confirming that the contents of the package are consistent and there are no problems, please
keep the box and related contents properly, when the instrument should meet the encasement requirements
when it return to the factory for service.
1.2 Hand Shank
The hand shank can be adjusted, hold the hand shank in both hands and then pull out two flanks to twist it, it
can be adjusted to four positions shown as the following Figure:
Figure 1.2.1 Original Position (Factory Setting) Figure 1.2.2 Testing Position
Figure 1.2.3 Remove Hand Shank Figure 1.2.4 Lift Position

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2.1 Product Overview
Digital power meter is an economic and portable measuring instrument, integrating voltage, current, power,
power factor and frequency as a multi-functional measuring instrument with cost-effective, which is widely used
in production, testing, evaluation and scientific research and other multi-field.
UTE9802 digital power meter adopts high speed CPU for data processing, voltage and current are sampled by
low temperature drift resistor or high precision transformer, so that the sampled signal is not filtered to ensure
the stability and accuracy of measurement data.
UTE9802 has true RMS measurement, it can adjust to the electric parameter measurement of various occasions
such as full wave, half wave (AC/DC type) and irregular waveform. This instrument can measure voltage (V),
current (A), active power (W), power factor P F and frequency Hz. It has perfect functions, superior performance
and simple operation.
The instrument can meet the needs of high-speed measurement in production sites, as well as laboratory and
R&D measurements. It is widely used in in the fields of lighting appliances, power tools, household appliances,
electric motors and electric heating appliances of production lines, laboratories and quality inspection
departments Various measurement functions can also be customized according to user requirements to meet
higher applications.
Characteristics of UTE9802
1.VA broken code screen display，reading intuitive, it adopts high speed A/D transformer and 32-bit MCU
operation.
2. Multi-window simultaneous display of voltage, current, power, power factor/frequency. With stable
measurement and fast measurement.
3. Automatic switching of voltage and current ranges to improve measurement accuracy.
4. Measurement accuracy is not affected by waveform, the instrument is high reliability and long life.
5. AC-DC type is more suitable for half-wave rectification measurement, it also can measure the AC component
in DC, as well as can be suitable for measuring the DC component in AC, true value (AC + DC).
6. It equipped with RS-232 and RS-485 serial communication interface to communicate with computer or PLC.
7. It can freely set the upper and lower alarm parameters of current and power, sound and light alarm
indication, and can set the delay alarm, batch detection to improve efficiency.
8.Communication address：1~32（only for MODE BUS protocol），baud rate：4800, 9600, 19200
UTE9811 digital power meter adopts high speed DSP processor and PLL (phase-locked loop) for data processing,
voltage and current are sampled by low temperature drift resistor or high precision transformer, so that the
sampled signal is not filtered to ensure the stability and accuracy of measurement data.
UTE9811 has true RMS measurement, it can measure voltage, current, power, power factor and frequency, voltage
crest ratio, and current crest ratio, with harmonic wave analysis and serial communication function.
The instrument has perfect functions, superior performance and simple operation. It can meet the needs of high-
speed measurement in production sites, as well as laboratory and R&D measurements. It is widely used in in the
fields of lighting appliances, power tools, household appliances, electric motors and electric heating appliances
of production lines, laboratories and quality inspection departments.

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Characteristics of UTE9811：
1. VA broken code screen display，reading intuitive, it adopts high speed DSP processor and PLL (phase-locked
loop) operation.
2. Multi-window simultaneous display of voltage, current, power, power factor, frequency, voltage crest ratio,
current crest ratio. With harmonic wave analysis, stable and fast measurement.
3. It adopts PLL simultaneous approach, the maximum of harmonic wave analysis is 50 times.
4. Automatic switching of voltage and current ranges to improve measurement accuracy.
5. The instrument is high reliability and long life.
6. It can set the current, the upper and lower limit of power, automatically determine whether the measured
value exceeds the limit, and can set a delayed alarm, sound and light alarm instructions, batch detection to
improve efficiency.
7. It equipped with RS-232 and RS-485 serial communication interface to communicate with computer or PLC.
8. Communication address：1~32（only for MODE BUS protocol），baud rate：9600, 19200, 38400, 115200
The basic theory of digital power meter
Figure 2.1.1 Theory Explanation
As shown in the figure, the instrument consists of an analog part and a digital part. The analog part is mainly
composed of sensors, multi-grade programmable amplifiers, sampling filters, A/D and other circuits. The digital
part consists of microcomputer data memory, keyboard and display.
After the measured voltage signal passes through the voltage sensor, the signal is reduced to a weak signal, which
is controlled by the microcomputer according to the signal size, and is amplified by the programmable multi-
range, and passed through the sampling filter, the voltage signal is converted into a digital signal by the
analog/digital converter A/D. The digital is transmitted to the microcomputer to calculate the voltage true rms
value (URMS) and output the value to the display.
After the current signal is passed through the current sensor, the signal is converted into a weak voltage signal,
like the measured voltage, which is amplified by a multi-grade programmable amplifier, sampling filter and A/D
converter, the true effective value of the voltage (IRMS) is calculated in the microcomputer and output to the
display.
2.2 Technical Specification
Table 2.2.1 Technical Specification
Model
UTE9802
UTE9811
Display
VA broken code display,5 digits，
four windows
VA broken code display,5 digits，
four windows

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Display Update Rate
About 3 time per second
Normal mode：about 2 time per
second
Harmonic analysis mode：about 2
time per second
Measuring Object
V,A,W,PF/Hz
V,A,W,PF/Hz/THD/THD%/CF
Measuring Mode
AC DC AC+DC(T-RMS)
AC
Voltage Range
3.0V-600V(75V/150V/300V/600V)
3.0V-600V (auto range)
Accuracy of Voltage
±（0.4% reading+ 0.1 range+1
digit）
±（0.4% reading+ 0.1 range+1
digit）
Voltage Resolution
0.01V
0.01V/
Current Range
0.5mA-20.0A(500mA/2A/8A/20A)
5.0mA～20.0A（auto range）
Accuracy of Current
±（0.4% reading+ 0.1 range+1
digit）
±（0.4% reading+ 0.1 range+1 digit
Current Resolution
0.0001A /0.001A/0.01A
0.001A/0.01A
Switching Range
Auto/Manual
Auto
Power Range
0.001W～12kW
1W～12kW
Accuracy of Power
±（0.4% reading+ 0.1 range+1
digit）
±（0.4% reading+ 0.1 range+1
digit）
Power Resolution
0.001W/0.01W/0.1W/1W
0.01W/0.1W/1W
Power Factor Range
-1.000～1.000
-1.000～1.000
Accuracy of Power Factor
±(0.004 + 0.001/ reading +1 digit)
±(0.004 + 0.001/ reading +1 digit)
Frequency Range
Basic frequency 40Hz～
130Hz,bandwidth：5kHz
Basic frequency:40Hz～70Hz,5kHz
Frequency
±(0.1% reading +1 digit)
±(0.1% reading +1 digit)
Auto
Range
Range
increasing
Measured value exceeds about 1 1
0 % rated range ( C F < 2 )
Measured value exceeds about 1 1
0 % rated range ( C F < 2 )
Range
decreasing
Measured range lower than about 3
0 % rated range ( C F < 2 )
Measured range lower than about 3
0 % rated range ( C F < 2 )
Time of Harmonic Wave
/
1～50 times
Accuracy of Harmonic Wave
/
土( 0 . 3 % range+ 5 % reading）
Pre-heating Time
>30min
>30 min
Current Peak
The maximum display 22A
The maximum display 22A
Maximum of Input Allowed
for Connection
Voltage 660V，current 22A
Voltage 660V，current 22A
Maximum of Input Instant
Allowed
1000V,40A(1 second)
1000V,40A(1 second)
Input Impedance
Voltage over than 1MΩ，current
less than 0.02Ω
Voltage over than 1MΩ，current
less than 0.02Ω
Guarantee Period of Accuracy
One year
Upper/Lower Limit
Four settings of the upper/lower limit of power and current：
P Hi (Power high),
P Lo(Power low),
A Hi(Current high),
A Lo(Current low)

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Interface
RS232（DB9;2-pin:TX、3-pin: RX、5-pin: GND）
RS485（DB9;8-pin:A、9-pin:B )
Baud Rate
4800, 9600, 19200 optional
9600, 19200, 38400, 115200
optional
Display-hold
√
Mute
√
Key Sound
√
Power Supply
Input power：AC 86-265V Frequency：50/60Hz
Precision Environment
18℃～28℃，30%～75%RH
Storage Temperature
-10℃～50℃，non-condensing below 80% RH
Operating Altitude
≤2000 meter
General Characteristic
Color
Gray
Weight
3.2kg
Size
214mm×88.2mm×340mm
Standard Accessories
Power cable x1；RS232 data cable x1
Optional Accessories
UTE-L10A 10A three-pronged plug convert banana head plug connection
cable x1
UTE-L16C 16A connection cable with alligator clip x1
UTE-L16A 16A three-pronged plug, banana plug connection cable x1
Standard Packing Quantity
2
Standard Packing Size
405mmx330mmx395mm
2.3 Front Panel
The front panel of UTE9802, as shown in Figure 2.3.1
Figure 2.3.1 UTE9802 Front Panel
Key and function on the front panel：
Table 2.3.1 UTE9802 Parts on Front Panel
Function
Symbol
Description
Display
Window
---
Four windows，simultaneous display voltage V, current A, power W,
power factor PF and frequency Hz.
ON/OFF
Turn on/off the power supply, press down to enable the instrument,
and press the key to pop out to disable it.
Data Hold
Data hold key to remain the current data when enable the instrument.

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PF/Hz
Switch PF, Hz
Voltage
Range
Press this key to step through range and auto range, Vauto means
voltage auto range, the fourth grade is automatically to be the best
grade, otherwise, it to be manual range.
Current
Range
Press this key to step through range and auto range, Aauto means
current auto range, the fourth grade is automatically to be the best
grade, otherwise, it to be manual range.
Setup
Set the upper/lower limit of current and power; alarm delay;
communication address; baud rate.
Mute
The buzzer alarm can be muted when the limit is exceeded, and the
mute button light is on, press again to recover the function.
Clear
Press this key and then press OK key to enter zero calibration mode.
Zero clearing means clear all the current data to zero, performing the
zero calibration mode.
Mode Switch
It can be select DC, AC, AC/DC measurement mode.
Lock
Press this key to lock all the keys, long press 1 second to unlock.
Front panel of UTE9811，as shown in Figure 2.3.2
Figure 2.3.2 UTE9811 Front Panel
Key and function on the front panel
Table 2.3.2 UTE9811 Parts on Front Panel
Function
Symbol
Description
Display
Window
---
Four windows，simultaneous display voltage V, current A, power W, power
factor PF and frequency Hz
ON/OFF
Turn on/off the power supply, press down to enable the instrument, and
press the key to pop out to disable it.
Data Hold
Data hold key to remain the current data when enable the instrument.

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PF/Hz
Switch PF, Hz
RMS
Root mean square
Relative/Absol
ute value of
Harmonic
Wave
THD voltage, Total Harmonic Distortion / Relative Value of Sub-harmonic
Distortion
THD% voltage, Total Harmonic Distortion / Relative Value of Sub-harmonic
Distortion
Setup
Set the upper/lower limit of current and power; alarm delay;
communication address; baud rate.
Mute
The buzzer alarm can be muted when the limit is exceeded, and the mute
button light is on, press again to recover the function.
Crest Ratio
Crest ratio of voltage/current.
Mode Switch
It can select HARM or RMS measurement mode.
Lock
Press this key to lock all the keys, long press 1 second to unlock.
2.4 Digital and Character Display
Figure 2.4.1 Digital and Character Display
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
1
2
3
4
5
6
7
8
9
0

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2.5 Rear Panel
Figure 2.5.1 UTE9802/UTE9811 Rear Panel
Table 2.5.1 UTE9802&UTE9811 Key and Function on Rear Panel
No.
Picture of parts
Description
1
Under test load/LOAD terminal
2
Under test input terminal /SOURCE terminal
3
Three-wire power socket and fuse
4
Waste Electrical and Electronic Equipment (WEEE) Instruction
2002/96/EC
Do not dispose the product in trash bin.
5
Ground terminal for chassis and Warning: before operating the
power, please make sure the instrument is well grounded.
6
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.
7
Warning：To prevent electric shock, be sure to turn off the
power and remove the power cord and test leads before
opening the cover.
8
Maximum input voltage and current
The specific voltage and current to the machine panel
identification shall prevail.
9
RS232 communication interface，serial communication
interface between the instrument and external devices, non-
SCPI communication, see Chapter 5 RS232 communication
introduction for details.

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Chapter 3 Operating Instruction and
Measurement Display
3.1 Before Use
3.1.1 Connecting Power Cable
The operating voltage of the instrument is 220V±10%, please make sure the power supply is within the rated
voltage of this instrument, and make sure the instrument is well grounded.
Warning: Please make sure that the power supply voltage matches the supply voltage before turning on the
power supply, otherwise the instrument will be burned out.
Note: The instrument should be used under the recommended working conditions. Never use the instrument in
a place where have flammable or explosive materials, it may cause safety injuries.
3.1.2 Connecting Test Circuit
Please follow Figure 3.1.1 to connect the power and load, and make sure voltage, current within the measurement
range.
Figure 3.1.1 Connecting Test Circuit
Warning：
1. The load current flows along the thick wire in the above diagram, so these wires should have a large enough
safe load capacity.
2. The power supply of the load and the power supply of the instrument should be turned off when wiring at the
load end.
Note：
1）When measuring large current/voltage or the current includes high frequency, it should pay attention to
possible mutual interference and noise problems when wiring.
2）The lead wire should as short as possible.
3）Use heavy gauge wire as can as possible when measuring current.
4）To reduce the distributed capacitance to ground, the wire and grounding wire should be as far away from the
instrument housing as possible.

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3.1.3 Turn ON/OFF Power
Turn on：Start self-check program when the instrument is enabled, enter the measuring state if the check result
is correct.
Turn off：The upper/lower limit of current and power will be saved when the power has been turned off.
Note：After turn off the power, wait 5 seconds to turn on again, otherwise the instrument may abnormally display.
3.1.4 Measurement
Firstly, plug in the power socket on the rear panel, and use the specified voltage, the power socket should be with
a ground wire. After checking the wiring is connect rightly, turn on the instrument switch located at the front
panel, and the instrument will enter the measurement state. Apply power to the load and read out the required
measurement value from the display on the front panel of the instrument after the load has been working stably.
Note: The instrument should be preheated for 30 minutes before entering the stable state. After cutting off the
instrument power, it should wait for more than 5 seconds before powering it on again. It is strictly forbidden to
switch the power on and off repeatedly within a short period of time, which will cause the instrument life to
shorten and may cause instrument failure. When the measurement is finished, turn off the instrument power and
unplug it to prevent possible damage to the instrument caused by lightning strikes.
3.2 Measurement Display
3.2.1 Window Display
UTE9802 and UTE9811 both have four window display, it can display different measured value at the same time,
the testing range is also different, see the below table 3.2.1 for more details.
Table 3.2.1 UTE9802/UTE9811 Window Display
No.
Window
Display
Name
Testing Range
Model
1
V
Voltage(Volt）
U: 3.0V～600V
UTE9802, UTE9811
2
A/mA
Current
（Ampere/milliamper
e）
I: 0.0005A～20A
UTE9802
I: 0.005A～20A
UTE9811
3
W
Active power（Watt）
P: 0.001W～12kW
UTE9802
P: 1W～12kW
UTE9811
4
PF
Power factor
PF: -1.000~1.000
UTE9802, UTE9811
Hz
Frequency（Hertz）
Hz: 40Hz～130Hz
UTE9802
Hz: 40Hz～70Hz
UTE9811
Note：
(1) If the input signal is very small, the frequency will be showed “0.00”
(2) It cannot be used beyond the measurement range indicated on the instrument.
UTE9802&UTE9811 have five parameters and four window display. Voltage V, current A, active power W will

UTE9802/9811 Digital Power Meter
16
display at the same time, power factor PF and frequency Hz will display by switching the function key. As shown
in Figure 3.2.1.
Figure 3.2.1 UTE9802&UTE9811 Window Display
3.2.2 Data Hold
Press Hold key to remain the current measured data (hold state), press Hold key again, Hold indicator light will
be light off and return to the common measuring state.
3.2.3 Lock
To prevent from error operating during measurement, Lock key can set other key be invalid (Lock stat). Lock
indicator light will be light on when press Lock key. Press one time will not work, it should be long press for 1
second to light off the indicator light and all the key return to use state.
3.3 UTE9802 Measuring Mode
3.3.1 AC Measuring Mode
Mode selection：Press“UTILITY”key to select AC measuring mode.
Measured object：AC mode is for signal which basic frequency 45Hz～130Hz, bandwidth 5kHz, it can be accurate
measuring and display the electric parameter value of AC component.
3.3.2 DC Measuring Mode
Mode selection：Press“UTILITY”key to select DC measuring mode.
Measured object：DC mode is for basic frequency which is DC signal, it can be accurate measuring and display
the electric parameter value of DC component.
Note：Before using this mode, the instrument can operating zero clearing to voltage and current channel
according to the actual state.

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3.3.3 AC+DC Measuring Mode
Mode selection：Press“UTILITY”key to select AC+DC measuring mode.
Measured object：AC+DC mode is for basic frequency which is DC signal or basic frequency 45Hz～130Hz,
bandwidth 5kHz, it can be accurate measuring and display the electric parameter value of measured object
(TRMS), such as the common half wave rectification.
Note：Before using this mode, the instrument can operating zero clearing to voltage and current channel
according to the actual state.
3.3.4 Measuring Mode Selection
When measured object waveform is symmetrical alternating current wave, the measuring mode can select AC
mode, which can eliminate the influence of the zero position. If the measured object waveform is DC and ripple
is very small, the measuring mode can select DC mode, which can eliminate the influence of AC signal.
If the measured object is not the two state mentioned above or the waveform is unknown, the measuring mode
be AC+DC mode, which can accurate measuring the true virtual value of measured object.
3.4 UTE9811 Measuring Mode
3.4.1 Normal Measuring Mode
The top left corner of "HARM" is not displayed for normal mode; "RMS" is the true value measurement state,
which can be accurate measuring and display the value of its AC parameters; "CF" is the crest measurement state,
which can be accurate measuring and display the crest ratio of voltage and current, power and frequency, power
factor of the load.
3.4.2 Harmonic Wave Measuring Mode
Press "UTILITY" key, HARM will be displayed in the top left corner, select it to enter the harmonic wave analysis
measurement mode, press this key again to exit the analysis mode. User can also press "THD/%" key to enter
analysis mode directly in normal mode.
The display is as follows.
Press “THD/%”key to select“THD%” mode to enter the relative value of total harmonic wave measurement.
Press“▲，▼” to select the relative value of sub-harmonic wave.

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Total Harmonic Wave First Harmonic Wave
Press “THD/%”key to select“THD%” mode to enter the relative value of total harmonic wave measurement.
Press“▲，▼” to select the absolute value of sub-harmonic wave.
Total Harmonic Wave First Harmonic Wave
Press “CF” to enter voltage and current crest ratio measurement

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Chapter 4 SETUP Function
Press【SETUP】to enter the setup page, and then press the direction key to enter parameter, continue to press
【SETUP】key to enter the next parameter setting.
4.1 The upper/lower limit of Current
4.2 The upper/lower limit of Power
4.3 Time Setting of Alarm Delay
4.4 Communication Address
Remark：This setting only for MODE BUS communication protocol

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4.5 Baud Rate
Sorting Function
When the production is finished, it should have inspection test in in production lines. Quality inspector often
need to test a large number of finished products with the same specifications to judge the quality of the batch.
In order to improve the testing efficiency, a certain range can be set within the instrument, and the instrument
will judge whether the product is qualified or not, improving the efficiency of reading and judgment, reducing
the work press of operators and greatly improving the testing efficiency.
In order to get the correct sorting results, it is necessary to set the correct parameters of the instrument. User can
set the upper/lower limit value of the current and power. If the measuring value of the measured object is greater
than the upper limit of the set value, or less than the lower limit of the set value, that means the measured object
is not qualified, the beeper will be sound. The upper limit value must be larger than the lower limit value, thus it
will be normal alarmed. When the upper and lower limit values are the same, it does not make alarm sound.
When the measured value is zero, the instrument does not make determination of the upper and lower limit of
power.