Unit UTE310 User manual

User’s Manual
UTE310 Digital Power Meter

User’s Manual UTE310 Digital Power Meter
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Table of Contents
Perface........................................................................................................................................ 6
Copyright ..................................................................................................................................... 6
Warranty Service.......................................................................................................................... 6
Limited Warranty and Liability ...................................................................................................... 7
Chapter 1 Safety Instruction.................................................................................................................... 8
1.1 Safety Information ................................................................................................................... 9
1.2 Environmental Condition .........................................................................................................11
Chapter 2 Inspection and Installment .....................................................................................................12
2.1 Check Packing List .................................................................................................................12
2.2 Handle...................................................................................................................................16
Chapter 3 Product Introduction..............................................................................................................16
3.1 Product Overview ...................................................................................................................16
3.2 Features................................................................................................................................ 17
3.3 Application System ................................................................................................................19
3.4 Technical Index......................................................................................................................19
3.5 Front Panel ............................................................................................................................21
3.5.1 Key Function on Front Panel ............................................................................................ 22
3.5.2 Key Combination ............................................................................................................ 23
3.5.3 Description of Display Screen.......................................................................................... 24
3.6 Rear Panel ............................................................................................................................ 26
Chapter 4 Operation Preparation and Wire Connection........................................................................... 27
4.1 Operation Preparation ........................................................................................................... 27
4.1.1 Connecting Power Cable .................................................................................................. 27
4.2 Wire Connection ................................................................................................................... 28
4.2.1 Direct Input Voltage and Wire Connection of Current (①) .................................................. 29
4.2.2 Direct Input Voltage and Wire Connection of CT Transformer (②) ..................................... 30
4.2.3 Direct Input Voltage and Wire Connection of EXT (③) ........................................................ 31
4.2.4 Direct Input Voltage and Wire Connection of CT Transformer + EXT (④).............................31
4.2.5 VT Transformer and Wire Connection of Direct Input Current (⑤) ..................................... 32
4.2.6 VT Transformer and Wire Connection of CT Transformer (⑥)............................................ 32
4.2.7 VT Transformer and Wire Connection of EXT (⑦).............................................................. 34
4.2.8 VT Transformer and Wire Connection of CT + EXT (⑧) ...................................................... 34
4.2.9 Connecting Power Supply ............................................................................................... 35

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Chapter 5 Measurement Settings .......................................................................................................... 36
5.1 Range Settings ...................................................................................................................... 36
5.1.1 Voltage Range Settings .................................................................................................... 36
5.1.2 Current Range Settings ................................................................................................... 36
5.1.3 Range Switching ..............................................................................................................37
5.2 Measurement Mode............................................................................................................... 38
5.3 Meter Common Measurement and Settings ............................................................................ 39
5.3.1 VIEW-1............................................................................................................................ 40
5.3.2 VIEW-2............................................................................................................................41
5.3.3 VIEW-3............................................................................................................................41
5.4 Harmonic Measurement ........................................................................................................ 43
5.4.1 BAR Graph....................................................................................................................... 44
5.4.2 LIST Mode ...................................................................................................................... 44
5.4.3 HARMONIC SET............................................................................................................... 45
5.5 Wave Display......................................................................................................................... 47
5.5.1 Time Axis ........................................................................................................................ 48
5.5.2 Vertical Axis ................................................................................................................... 48
5.6 Integration............................................................................................................................ 48
5.6.1 Normal Integration .......................................................................................................... 49
5.6.2 Continuous Integration ................................................................................................... 50
5.6.3 Comparsion of Integration Mode.......................................................................................51
5.6.4 Integration Mehod........................................................................................................... 53
5.6.5 Integration Settings........................................................................................................ 53
5.6.6 Integration Operation...................................................................................................... 55
5.6.7 Limitations during Integration ......................................................................................... 56
Chapter 6 Setup Menu........................................................................................................................... 57
6.1 SETUP................................................................................................................................... 58
6.1.1 Sync Source..................................................................................................................... 58
6.1.2 Line Filter ....................................................................................................................... 60
6.1.3 Frequency Filter...............................................................................................................61
6.1.4 Crest Factor .............................................................................................................. 62
6.1.5 Data Update Interval .................................................................................................. 62
6.1.6 Auto Timer (Timeout) ................................................................................................. 63
6.1.7 Auto Rate Sync (Automatic data synchronization)........................................................ 64

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6.1.8 Reset Init (Initialization).............................................................................................. 64
6.2 Average Filter (AVG)............................................................................................................... 65
6.2.1 Average State (Turn on/off) ........................................................................................ 66
6.2.2 Average Type............................................................................................................. 66
6.2.3 Count (Average factor) ................................................................................................67
6.3 External Current Sensor (EXT).................................................................................................67
6.3.1 Ext Sensor CH.............................................................................................................67
6.3.2 Ext1 Ratio (mV/A) ....................................................................................................... 68
6.3.3 Ext2 Ratio (mV/A)....................................................................................................... 68
6.4 SCALE (VT and CT Ratio)........................................................................................................ 69
6.4.1 SCALE State (Turn on/off scaling transformation) ....................................................... 69
6.4.2 VT/CT/PT (Scaling coefficient) ................................................................................... 70
6.5 JUMP (Range skipping) ........................................................................................................... 71
6.5.1 Skipping Configuration .................................................................................................... 72
6.5.2 U/I Peak Over (Peak-over jump)................................................................................... 72
6.6 D/A Output and Contol............................................................................................................73
6.6.1 D/A Output Format......................................................................................................73
6.6.2 D/A Output Range Mode .................................................................................................. 74
6.6.2 D/A Output Interface Remote Control ..........................................................................77
6.6.3 Pin Definition of D/A Output ........................................................................................79
Chapter 7 System Menu ........................................................................................................................ 80
7.1 INFO (System Information) ..................................................................................................... 80
7.2 SET (System Setting)............................................................................................................. 80
7.2.1 Brightness .......................................................................................................................81
7.2.2 Key Sound .......................................................................................................................81
7.2.3 Comm Protocol（Communication Protocol）...................................................................81
7.2.4 Storage .......................................................................................................................... 82
7.2.5 Time Interval................................................................................................................... 82
7.2.6 TIMER (System Time) ...................................................................................................... 83
7.3 RS232 Setting ....................................................................................................................... 83
7.3.1 Baud Rate ....................................................................................................................... 83
7.4 IP Setting .................................................................................................................. 84
7.4.1 IP Model .......................................................................................................................... 84
7.4.2 IP Address ...................................................................................................................... 84

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7.4.3 Subnet Mask................................................................................................................... 85
7.4.4 Gateway ......................................................................................................................... 85
7.5 USB (Load and Save).............................................................................................................. 85
Chapter 8 Communication .................................................................................................................... 85
8.1 RS-232 Interface ................................................................................................................... 85
8.1.1 RS-232 Settings............................................................................................................... 86
8.1.2 PC Connect to UTE310 via RS-232 .....................................................................................87
8.2 LAN Interface ........................................................................................................................87
8.2.1 LAN Setting .................................................................................................................... 88
8.2.2 PC Connect to UTE310 via LAN ........................................................................................ 88
8.3 USB Interface ....................................................................................................................... 89
8.3.1 PC Connect to UTE310 via USB......................................................................................... 90
8.4 GPIB Interface (Optional) ....................................................................................................... 90
8.4.4 PC Connect to UTE310 via GPIB Interface..........................................................................91
Chapter 9 Storage and Calibration ......................................................................................................... 93
9.1 Notices for Storage ............................................................................................................... 93
9.2 Trouble-shooting .................................................................................................................. 93
9.3 Notices for Calibration .......................................................................................................... 93
Chapter 10 Replace Fuse....................................................................................................................... 95
Appendix 1 Symbol and Formula of Measurement ................................................................................... 96
Appendix 2 Measurement Accuracy and Measurement Error................................................................... 97

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Perface
Thank you for choosing this brand new UNI-T instrument. In order to use this instrument safely and correctly,
please read this manual thoroughly, especially the Safety Requirements part.
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
Copyright is owned by Uni-Trend Technology (China) Co., Ltd.
UNI-T products are protected by patent rights in China and other countries, including issued and pending
patents. Uni- Trend reserves the rights to 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

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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 all shipping,
duties, taxes, and any other expenses.
Limited Warranty and Liability
The warranty is inapplicable to any defects, failures or damages caused by accident, normal wear of
components, use beyond specified scope or improper use of product, or improper or insufficient
maintenance. UNI-T is not obliged to provide the services below as prescribed by the warranty:
a) Repair damage caused by installation, repair or maintenance of personnel other than service
representatives of UNI-T;
b) Repair damage caused by improper use or connection to incompatible equipment;
c) Repair any damages or failures caused by using power source not provided by UNI-T;
d) Repair products that have been changed or integrated with other products (if such change or integration
increases time or difficulty of repair).
The warranty is formulated by UNI-T for this product, replacing any other express or implied warranties. UNI-
T and its distributors refuse to give any implied warranty formarketability or applicability for special purpose.
For violation of the warranty, repair or replacement of defective products is the only and all remedial measure
UNI-T provides for customers.

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No matter whether UNI-T and its distributors are informed of any possible indirect, special, occasional or
inevitable damage in advance, they assume no responsibility for such damage.
Chapter 1 Safety Instruction
To ensure the personal safety and to prevent damage to the instrument, please read and obey the safety
instructions carefully before using the instrument. Failure to follow these precautions and the specific
warnings described in this manual may result in a violation of the safety regulations governing the design,
manufacture, and use of the instrument, and UNI-Tassumes noresponsibility for theuser's failure to comply.
1. Do not use damaged equipment. Before using the device, check its outer shell. Check whether has
cracks or missing plastic. Do not operate the equipment in an environment containing explosive gases,
vapors or dust.
2. Only professionally trained personnel can perform maintenance procedures, to avoid fire and personal
injury; personnel must be supervised during use, and the instrument and its power supply should be
turned off when not supervised.
3. Before connecting the device, please carefully observe all markings on the device and consult the
manual for detailed information on ratings, read through all warnings and cautions in this manual.
4. The operating power of the instrument is 100 to 240 VAC, 50/60 Hz.
5. The factory is equipped with a three-core power cord, only use the power cord provided by the
manufacturer to avoid accidental injury; do not plug or unplug the power cord with electricity; do not
place other objects on the power cord when using it and make sure that the power cord is away from
heat sources.
6. The product should reliably ground. This product is grounded through the grounding conductor of the
power supply. To avoid electric shock, the grounding conductor must be reliably connected to ground.
7. Do not install substitute parts on the instrument by yourself or perform any unauthorized modifications;
do not open the casing for operation, and do not use the equipment with the cover or panel open or loose.
8. During the test, do not touch the terminals and test wires of the instrument to prevent electric shock;
do not plug or unplug the communication ports with electricity; do not place any objects on the
instrument to avoid damage to the instrument, especially pay attention to not let the metal shavings and
liquid (such as water and oil) into the internal of the instrument, otherwise it will cause unpredictable

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and serious consequences.
9. The circuits shall not be exposed. Do not touch exposed connectors and components after power is
turned on.
10. Use the appropriate fuse, only use the fuse type and rating indicator specified for this product.
11. Do not operate the product if you suspect it has malfunctioned; if you suspect the product has
malfunctioned, please consult the qualified maintenance personnel.
12. If the instrument will not be used for a long time, please unplug the power cord from the power outlet,
please do not pull the power plug by pulling the power cord.
13. Before carrying the instrument, make sure that the power cord and other connecting cables have been
unplugged. When carrying the instrument, please use the carrying handle on the side of the instrument,
and put it down gently to prevent collision.
1.1Safety Information
Use a standard three-prong flat-plug power cord and plug the instrument into an electrical outlet
that grounded in good condition.
Please use the instrument in a safe manner according to the instructions in this manual.
Do not remove or modify the instrument by yourself.
If you encounter any instrument failure, please contact the original manufacturer for maintenance.
Safety Sign
Danger
“Danger” indicates the presence of a hazard. It reminds users to pay attention to a certain
operation process, operation method or similar. Personal injury or death may occur if the
rules in the “Danger” statement are not properly executed or observed. Do not proceed
to the next step until you fully understand and meet the conditions stated in the “Danger”
statement.
Warning
“Warning” indicates the presence of a hazard. It reminds users to pay attention to a
certain operation process, operation method or similar. Product damage or loss of
important data may occur if the rules in the “Warning” statement are not properly
executed or observed. Do not proceed to the next step until you fully understand and
meet the conditions stated in the “Warning” statement.
Caution
It indicates possible danger, which may cause damage to this device or other equipment
if you fail to follow a certain procedure or condition. If the “Caution” sign is present, all
conditions must be met before you proceed to operation.
Note
It indicates potential problems, which may cause failure of this device if you fail to follow
a certain procedure or condition. If the “Note” sign is present, all conditions must be met
before this device will function properly.
AC
Alternating current of device. Please check the region’s voltage range.
DC
Direct current of device. Please check the region’s voltage range.

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Grounding
Frame and casing cover grounding terminal
Grounding
Protective grounding terminal
Grounding
Measurement grounding terminal
CAT 0
This instrument is suitable for measurements on circuits that are not directly connected
to the grid power supply and circuits that are specially protected to be powered from the
(internal) grid. In the latter case, the transient stresses are different, and the instrument
should be used for this type of measurement to ensure that the peak transient voltage is
less than 3000 V.
CAT I
Secondary electrical circuit connected to wall sockets through transformers or similar
equipment, such as electronic instruments and electronic equipment; electronic
equipment with protective measures, and any high-voltage and low-voltage circuits,
such as the copier in the office.
CAT II
Primary electrical circuit of the electrical equipment connected to the indoor socket via
the power cord, such as mobile tools, home appliances, etc. Household appliances,
portable tools (e.g. electric drill), household sockets, sockets more than 10 meters away
from CAT III circuit or sockets more than 20 meters away from CAT IV circuit.
CAT III
Primary circuit of large equipment directly connected to the distribution board and
circuit between the distribution board and the socket (three-phase distributor circuit
includes a single commercial lighting circuit). Fixed equipment, such as multi-phase
motor and multi-phase fuse box; lighting equipment and lines inside large buildings;
machine tools and power distribution boards at industrial sites (workshops).
CAT IV
Three-phase public power unit and outdoor power supply line equipment. Equipment
designed to “initial connection”, such as power distribution system of power station,
power instrument, front-end overload protection, and any outdoor transmission line.
Certification
CE indicates a registered trademark of EU
Certification
UKCA indicates a registered trademark of UK
Waste
This product complies with the marking requirements of WEEE Directive (2002/96/EC).
This additional label indicates that this electrical / electronic product must not be
discarded in household waste.
EFUP
This environment-friendly use period (EFUP) mark indicates that dangerous or toxic
substances will not leak or cause damage within this indicated time period. The
environment-friendly use period of this product is 40 years, during which it can be used
safely. Upon expiration of this period, it should enter the recycling system.
Warning
The UTE310 Digital Power Meter only supports measurement of power supplies under CAT II (600V)
type overvoltage conditions, so please use the instrument strictly in accordance with this
measurement environment.
General Instructions
The following instructions are listed for personal safety and equipment protection.
Defective protection function