Unit UTE9802+ User manual

User’s Manual
UTE9802+ Smart Digital Power Meter

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Preface
Thank you for purchasing this brand new UNI-T 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
Copyright is owned by Uni-Trend Technology (China) Limited.
UNI-T products are protected by patent rights in China and foreign countries, including issued and pending
patents.
UNI-T reserves the rights to any product specification and pricing changes.
UNI-T reserves all rights. Licensed software products are properties of Uni-Trend and its subsidiaries or
suppliers, which are protected by national copyright laws and international treaty provisions. Information in
this manual supersedes all previously published versions.
UNI-T is the registered trademark of Uni-Trend Technology (China) Co., Ltd.
Warranty Service
UNI-T warrants that the product will be free from defects for one year. If the product is re-sold, the warranty
period will be from the date of the original purchase from an authorized UNI-T distributor. Probes, other
accessories, and fuses 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. Replacement parts and products may be brand new, or perform at the same
specifications as brand new products. All replacement parts, modules, and products 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 to
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 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 warranty shall not apply to any defects or damages caused by accidental, machine parts’ wear and tear,
improper use, and improper or lack 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 repair damage caused by improper use or connection to an incompatible device.

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c) Any damage or malfunction caused by the use of a power source which does not conform to the
requirements of this manual.
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 merchant ability or applicability
purposes.
For violation of this guarantee, regardless of whether UNI-T and its distributors are informed that any
indirect, special, incidental, or consequential damage may occur, UNI-T and its distributors shall not be
responsible for any of the 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 usethe 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 execute 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 theinstrument 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.
6. Instrument grounding：To prevent the risk of electric shock, please connect the power ground wire.
7. Do not install substitutes or perform unauthorized changes; donot use theinstrument whenthe outer shell
opened or looseness.
8. During the test, do not touch terminal blocks and test line to prevent from electric shock; do not 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,

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otherwise, it may cause unpredictable and serious consequences.
9. Avoid exposed circuits, do not touch exposed connectors and components after the power is turned on.
10. Use the appropriate fuse, only with the fuse type and rating indicator specified for this product.
11.Do not use the instrument that work abnormally; if you suspect that the product has malfunctioned, let
qualified maintenance personnel to check the instrument.
12. 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+ digital power meter 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 meters
Explanation：In order to ensure the measurement accuracy, it is recommended to start the operation after
half an hour to warm-up the machine.

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Chapter 1 Inspection and Installment
1.1 Check Packing List
Check with packing list to confirm that accessories has no loss or abnormal. If there have any problem,
please contact with UNI-T distributor or manufacture.
No.
Components
Quantity
Remark
1
Digital power meter
1
UTE9802+
2
Power cable
1
3
RS-232 communication
line
1
4
User’s manual
/
Please download from official website.
http://www.uni-trend.com
Explanation：After confirming that the contents of the packageare consistent and there are no problems,
please keep the box and related contents properly, the instrument should meet the encasement
requirements if it return to the factory for service.
1.2 Hand Shank
The hand shank can be adjustment, hold the hand shank in both hands and then pull out two flanks to twist it,
it can be adjust to four positions shown as the following Figure
1. Original Position (Factory Setting)
2. Testing Position

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3. Remove Hand Shank
4. Lift Position

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Chapter 2 Product Introduction
2.1 Product Overview
UTE9802+ smart digital power meter is an economic and portable measuring instrument. It is a multi-
functional measuring instrument which integrating voltage, current, power, power factor and frequency. The
products is widely used in production, testing, evaluation and scientific research and multi-field.
UTE9802+ digital power meter adopts high speed CPU for data processing, the sampling resistance of
voltage and current are all use low temperature drift resistor, therefore, the stability and accuracy of
measurement data are guaranteed.
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 (PF) 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.
Characteristics
1. VA broken code screen display for intuitive reading. It adopts high speed A/D transformer and 32-bit MCU
operation.
2. Multi-window simultaneous display of voltage, current, power, power factor/frequency.
3. The range of voltage and current has manual range and automatic range.
4. AC, DC, AC+DC (T-RMS) mode.
5. Average function can make the reading more stable and it suitable for measuring the load or power with
large variations.
6. Data upgrade period can be set. User can select a faster upgrade period according to the test needs, so
as to improve the test efficiency.
7. Communication interface supports RS-232 and RS-485. Communication protocol supports SCPI and
Modbus for communicating with computer and PLC.
8. It can freely set the upper and lower limit of current and power, the digital power meter will automatic
judge whether the test value is exceed. Sound and light alarm indication, it is convenient for batch
detection to improve the measurement efficiency.

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2.2 Technical Index
* f represent the frequency of input signal in the below table.
Model
UTE9802+
Display
VA broken code display, 5 digits，four windows
Display Update Rate
0.1S, 0.25S, 0.5S, 1S, 2S, 5S
Measuring Object
V, A, W, PF/HZ
Measuring Mode
AC, DC, AC+DC (T-RMS)
Measuring Range of Voltage
3.0V-600V
Voltage Range
75V/150V/300V/600V
Accuracy of Voltage
DC：±(0.4% reading+ 0.1 range+1 character)
40Hz≤f≤66Hz：±(0.4% reading+ 0.1 range+1 character)
66Hz＜f≤400Hz：±(0.3% reading+ 0.2 range+1 character)
Voltage Resolution
0.01V/0.1V
Measuring Range of Current
0.5mA-20.0A
Current Range
500mA/2A/8A/20A
Accuracy of Current
DC：±(0.4% reading+ 0.1 range+1 character)
40Hz≤f≤66Hz：±(0.4% reading+ 0.1 range+1 character)
66Hz＜f≤400Hz：±(0.3% reading+ 0.2 range+1 character)
Current Resolution
0.0001A /0.001A
Switching Range
Auto/Manual
Power Range
1W~12kW
Accuracy of Power
DC：±(0.4% reading+ 0.1 range+1 character)
40Hz≤f≤66Hz：±(0.4% reading+ 0.1 range+1 character)
66Hz＜f≤400Hz：±(0.3% reading+ 0.2 range+1 character)
Power Resolution
0.001W/0.01W/0.1W/1W
Power Factor Range
-1.000~1.000
Accuracy of Power Factor
±(0.004 + 0.001* reading +1 character)
Frequency Range
DC, 40Hz～400Hz
Accuracy of Frequency
±(0.1% reading +1 character)
Auto Range
Voltage Range
Increasing
Urms exceeds the measuring range about 110% ( CF < 2 )

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Voltage Range
Decreasing
Urms is less than the lower part range about 80% ( CF < 2)
Current
Range
Increasing
Irms exceeds the measuring range about 110% ( CF < 2 )
Current
Range
Decreasing
Irms is less than the lower part range about 60% ( CF < 2 )
Pre-heating Time
>30 mins
Current Peak
The maximum display 24A
Maximum of Allowed Input for
Continuous
Voltage 700V，Current 24A
Maximum of Allowed Input for
Instant
1000V, 40A (1 min)
Input Impedance
Voltage about 2 M Ω，Current is less than 0.02Ω
Upper/Lower limit
Four settings for the upper/lower limit of power and current
P Hi (Power high),
P Lo (Power low),
A Hi (Current high),
A Lo (Current low)
Average Function
√
Interface
RS232（DB9 ; 2-pin: TX, 3-pin: RX, 5-pin: GND)
RS485 (DB9 ; 8-pin: A , 9-pin: B )
Baud Rate
4800，9600，19.2K，38.4K，57.6K，115.2K，default 9600.
It follows communication protocol of standard SCPI and Modbus-
RTU.
Display Hold
√
Mute
√
Lock Key
√
Power Source
Input power：AC 100V~240V Frequency 50/60Hz
Precision Environment
18℃~28℃，30%~75%RH (28℃< operating temperature < 18℃
(when in 18℃, it needs to add temperature coefficient)：reading of
0.05%/℃)
Storage Temperature
-10℃~50℃，non-condensing below 80% RH

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Operating Altitude
≤2000 meters
General Characteristic
Color
Gray
Weight
3.3kg
Size
214mm×88mm×340mm
Standard Accessories
Specialized power cable x1；RS232 serial port line 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 convert banana head plug
connection cable x1
Standard Packing Quantity
（Outer box）
2
Standard Packing Size
400mm*300m*325mm
Gross Weight of Standard
Packing
9kg
2.3 Front Panel
The front panel and function of UTE9802+, as shown in the following figure.
2.3.1 Key function on the front panel
Key
Function
Symbol
Description
Power
Switch
Press one time to turn “ON”, the power source is enabled, press it again to turn
“OFF”, the power source is disabled.

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Left, Right
Key
Switch sub-menu：Use left, right key to select the sub-menu that need to be
edited.
Number editing: Use left, right key to select the data bit that need to be edited.
For description, use “←”,“→”to indicate the two keys in the manual.
Up, Down
Key
Menu editing: Use up, down key to select function item.
Number editing: Use up, down key to increase or decrease the numerical value.
For description, use “↑”,“↓”to indicate the two keys in the manual.
Decimal
Point Key
Number editing: To move decimal point
Display Hold
Data hold key, when the key is activated, it will keep display the current data.
PF/Hz
To select the fourth line to display power factor or frequency.
Voltage
Range
To select fixed range or auto range. Vauto is auto range.
Current
Range
To select fixed range or auto range. Aauto is auto range.
Setup Key
Enter Setup menu, this menu is to editing the configuration data of
measurement, alarm and communication.
Mute Key
The beeper can be mute when over the limit (mute alarm). Press the key to
activate mute key and the indicator will be illuminated; press it again to relieve
the mute and the indicator will be extinguished.
Zero (Clear)
Press this key to enter zero correction state. Zero function is to recalibrate
zero bit value of voltage and current channel.
Enter or
Utility Key
Enter Key: Short press is to activate confirm key to save the currently edited
data.
Utility Key: Long press is to activate Utility key to enter Utility menu.
Lock Key
Press this key and the indicator will be illuminated. Long press to unlock the
key and the indicator will be extinguished.
2.3.2 Display and Symbol
Display and Symbol
Description
Four display windows；
Display measurement data: The display screen can display V (voltage), A
(current), W (power), PF (power factor)/Hz (frequency) at the same time.
Menu editing: Display menu
An upgrade symbol of measurement data.
, ,
Alarm Symbol
OK：Measurement value of the current and power within the upper/lower

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, ,
limit.
A Hi：Measurement value of current is higher than the upper limit.
A Lo：Measurement value of current is lower than the upper limit.
P Hi：Measurement value of power is higher than the upper limit.
P Lo：Measurement value of power is lower than the upper limit.
, ,
Measuring mode
The currently voltage range, when it displays V auto, it is auto range.
The currently current range, when it displays A auto, it is auto range.
2.4 Digital and Character Display
The data display format of data display window is nixie tube. Due to the limitation of the format, special
symbols are needed to represent each character, as shown in the following figure.
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
The rear panel and function of UTE9802+, as shown in the following figure and table.
No.
Picture of parts
Description
1
Under test load/LOAD terminal, it usually used to connect to the
input port of the product to be test.
2
Under test input terminal /SOURCE terminal，it usually used to
connect to the output port of AC power.
3
Three-wire power socket and fuse
4
Ground terminal
5
RS232/RS485 communication interface

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Chapter 3 Operating Preparation and Measurement
Display
3.1 Operating Preparation
3.1.1 Connecting Power Cable
The operating voltage of the instrument is 100V~240V (50/60Hz), 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.
Notes: 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 the following figure to connect the power and load, and make sure voltage and current is within
the measurement range of the instrument.
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.
Notes:
1）When measuring large current/voltage or the current includes high frequency, it should payattention
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

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from the instrument housing as possible.
3.1.3 Turn ON/OFF Power Supply
Turn on：Start self-check program when the instrument is enabled, the instrument will 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.
Notes：After turn off the power, wait for 5 seconds to turn on again, otherwise the instrument may abnormally
display.
3.1.4 Power-on 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.
Notes: 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+ has four display windows, it can display different measurement value at the same time, as shown
in the following table.
No.
Window Display
Name
Measurement Range
1
V
Voltage (volt）
U: 3.0V～600V
2
A
Current（Ampere/milliampere）
I: 0.0005A～20A
3
W
Active power（Watt）
P: 0.001W～12kW
4
PF
Power factor
PF: -1.000~1.000
Hz
Frequency（Hertz）
Hz: 40Hz～400Hz

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The four window display as shown in the following figure.
3.2.2 Alarm for Over Range
These situations will be regarded as over range.
1. The measured value of voltage and current exceeds 120% of the rated range;
2. The peak value of voltage and current exceeds 170% of the rated range；
“--OL-”will be appear when the range is exceeded.
3.2.3 Alarm for the Lower Measured Value
The alarm will be appear if the measured value of voltage is less than 3V or the measured value of current is
less than rated value 0.1%.
1. Voltage, current, power displays “0”.
2. Power factor displays “-----”.
3.2.3 Alarm for Break Off
When switch measurement range and function, “-----”will be appear for a while.
3.2.4 Hold (Data-Hold)
Press Hold key and the indicator will be illuminated, the measurement value will keep display and the data will
not refresh. Press it again, the indicator will be extinguished and the data will be update.
3.2.5 Lock (Key Lock)
To prevent from error operating during measurement, key lock function can set other key be invalid (Lock
state). Press Lock key and the indicator light will be illuminated. This key will be no response. It need to long
press Lock key for 1s and the indicator light will be extinguished. After that, the key will turn to enable state.

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Chapter 4 Measurement
4.1 Measurement Range
4.1.1 Voltage Range
·Step
Press【V.Range】key to switch to voltage range.
·Explanation
The range can set to Auto, 600V, 300V, 150V or 75V.
The display interface will synchronous display the current selected voltage range.
4.1.2 Current Range
·Step
Press【A.Range】key to switch to current range.
·Explanation
The range can set to Auto, 20A, 8A, 2A or 0.5A.
The display interface will synchronous display the current selected current range.
4.1.3 Manual/Auto Range
•Manual Range
If the measurement range is set to manual range, the selected range will not be change even if the size
of input signal changes.
The manual range can select from the following options.
Voltage range：600V, 300V, 150V, 75V.
Current range：20A, 8A, 2A, 0.5A.
•Auto Range
If the measurement range is set to auto range, the instrument will synchronous switch range according
to the size of input signal.
Voltage Range Increasing
The voltage range will increasing when any one of the following condition is met.
Urms exceeds measurement range about 110%.
Upk exceeds measurement range about 170%.
Voltage Range Decreasing
The voltage range will decreasing when any one of the following condition is met.
Urms is less than the lower part range about 80%.
Upk is less than the lower part range about 170%.
Current Range Increasing
The current range will increasing when any one of the following condition is met.
Irms exceeds measurement range about 110%.
Ipk exceeds measurement range about 170%.

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Current Range Decreasing
The current range will decreasing when any one of the following condition is met.
Irms is less than the lower part range about 60%.
Ipk is less than the lower part range about 170%.
4.3 Measurement Mode
·Step
1. Press【SETUP】key to enter SETUP menu，the current submenu is “MODE”, as shown in the following
figure;
2. Press【ENTER】key to enter the next option, and then press【↑】or【↓】key to select ACDC，
AC or DC;
3. Press【ENTER】key to select the current selected option and save it；
4. Press【←】or【→】key to select other submenu, or press【SETUP】key to exit SETUP menu.
·Explanation
Measurement Mode
Measurement Mode
Voltage
Current
ACDC（AC+DC)
TRMS
TRMS
AC
AC component
AC component
DC
Simple average
Simple average
Theoretical Equation
ACDC (AC+DC): Select this mode to display the TRMS value of the voltage and current.
T
0
2dt)t(f
T
1
DC：This mode is for inputting DC voltage and current, it will execute simple average for input signal.
T
0dt)t(f
T
1
AC：Display the AC component of voltage or current.
f(t): input signal
T: a period of input signal
f(t): input signal
T: a period of input signal

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2
dc
2
rmsac UUU 
or
2
dc
2
rmsac III 
Urms，Irms：TRMS of voltage ad current
Udc，Idc：Simple average of voltage ad current
4.4 Average
·Step
1. Press【SETUP】key to enter SETUP menu，press【←】or【→】key to select submenu“AVG”as
shown in the following figure；
2. Press【ENTER】key to enter the next option, and the press【↑】or【↓】key to select OFF, 8, 16,
32 or 64;
3. Press【ENTER】key to select the current selected option and save it；
4. Press【←】or【→】key to select other submenu, or press【SETUP】key to exit SETUP menu.
·Explanation
OFF represents the average function is disabled. 8, 16, 32, 64 represents the average function is
enabled and the number of average.
Average
The average method is moving average, it is for power supply or load with great variation or the
numerical value display is unstable, reading is difficult when the frequency of input signal is low.
The average measurement functions are U, I, P, S, Q and λ(power factor) calculated by the average
value of Urms, Irms, P, S, Q.
*Notes: S (apparent power), Q (reactive power) is only for the operation, it will not show on the display
interface.
Moving Average
According to the following formula, use the specified average number to calculating the moving
average.

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4.5 Data Update Cycle
·Step
1. Press【SETUP】key to enter SETUP menu，press【←】or【→】key to select submenu“u.rate”as
shown in the following figure；
2. Press【ENTER】key to enter the next option, and the press【↑】or【↓】key to select 0.1, 0.25,
0.5, 1, 2 or 5;
3. Press【ENTER】key to select the current selected option and save it；
4. Press【←】or【→】key to select other submenu, or press【SETUP】key to exit SETUP menu.
·Explanation
The data update cycle is the update interval of the sampled data of the measurement function.
The data update cycle can set to 0.1s, 0.25s, 0.5s, 1s, 2s or 5s. The default is 0.25s.