Unit UT205E User manual

1000A True RMS
Digital Clamp Meter
UT205E/
UT207B/UT208B
UT206B
P/N:110401109411X

Preface
Thank you for purchasing the new clamp meter. In order to use this product
safely and correctly, please read this manual thoroughly, especially the Safety
Instructions 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.
Limited Warranty and Liability
Uni-Trend guarantees that the product is free from any defect in material and
workmanship within one year from the purchase date. This warranty does not
apply to damages caused by accident, negligence, misuse, modification,
contamination or . The dealer shall not be entitled to give any mishandling other
warranty on behalf of Uni-Trend. If you need warranty service within the warranty
period, please contact your seller directly.
Uni-Trend will not be responsible for any special, indirect, incidental or subsequent
damage or loss caused by using this device.
UT205E/UT206B/UT207B/UT208B User Manual

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I. Overview ------------------------------------------------------------------- 4
II. Accessories 4
III. Safety Instructions 5
IV. Electrical Symbols 6
V. External Structure 7
VI. LCD Display 8
VII. 11
VIII. Specifications 13
IX. Operating Instructions 22
X. Maintenance 38
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Function SwitchDial and Function Buttons --------------------
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Table of Contents
I. Overview
Warning:
Before using the meter, please read the Safety Instructions carefully.
II. Accessories
Open the package box and take out the meter. Please double check whether
the following items are missing or damaged.
a) User manual ------------------------------------------------------------ 1 pc
b) Test leads 1 pair ----------------------------------------------------------------
c) K-type thermocouple (UT206B/UT208B) 1 pc -----------------------
d) Cloth bag 1 pc -----------------------------------------------------------------
e) 1.5V AAA batteries 3 pcs ----------------------------------------------------
f) Flexible current probe (UT206B/UT208B) optional ----------------------
If any of the above is missing or damaged, please contact your supplier
immediately.
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
The UT205E/UT206B/UT207B/UT208B is a 6000-count handheld true RMS
clamp meter with auto range. This full scale overload protection meter contains
the following features:
AC/DC voltage, AC current, resistance, diode, continuity, capacitance, frequency,
duty ratio, data hold, MAX/MIN, relative
DC current (UT207B/UT208B)
Temperature (UT206B/UT208B)
LPF (low pass filter) and LoZ (low impedance) voltage (UT206B/UT207B/UT208B)
Inrush current measurement (UT206B/UT207B/UT208B)
Analog bar display (UT206B/UT207B/UT208B),
Flashlight, NCV, low battery indication, and auto power off
The UT206B/UT208B can also be equipped with a flexible current probe to
extend the AC current measurement range to 3000A (optional accessory).

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III. Safety Instructions
The meter is designed and manufactured according to IEC61010-1, IEC61010-
2-032 and IEC61010-2-033 safety standards, and conforms to CAT III 1000V,
CAT IV 600V, double insulation, and pollution degree 2.
Note: Before each use, verify meter operation by measuring a known voltage.
If the meter is used in a manner not specified by the manufacturer, the protection
provided by the equipment may not be guaranteed.
IV. Electrical Symbols
Description
Equipment protected throughout by DOUBLE INSULATION
or REINFORCED INSULATION
Earth (ground)
Warning or Caution
Alternating current
Direct current
Continuity buzzer
Diode
Capacitance
Alternating current or direct current
Caution, possibility of electric shock
Application around and removal from UNINSULATED
HAZARDOUS LIVE conductors is permitted.
Complies with European Union standards
Conforms to UL STD 61010-1, 61010-2-032, 61010-2-033, Certified
to CSA STD C22.2 No. 61010-1, 61010-2-032, 61010-2-033.
It is applicable to testing and measuring circuits connected to the
distribution part of the building's low-voltage MAINS installation.
It is applicable to testing and measuring circuits connected at
the source of the building’s low-voltage MAINS installation.
CAT IV
CAT III
Symbol
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1. Before use, please check if there is any item which is damaged or behaving
abnormally. If any abnormal item (such as bare test lead, damaged meter
casing, broken LCD, etc.) is found, or if the meter is considered to be
malfunctioning, please do not continue to use the meter.
2. Do not use the meter if the rear cover or the battery cover is not completely
covered up, it may pose a shock hazard!
3. When using the meter, keep fingers behind the finger guards of the test leads,
and do not touch exposed wires, connectors, unused inputs, or circuits being
measured to prevent electric shock.
4. The function dial should be placed in the correct position before measurement.
5. Do not apply voltage over 1000V between any meter terminal and earth ground
to prevent electric shock or damage to the meter.
6. Use caution when working with voltage above AC 30Vrms, 42Vpeak or DC
60V. Such voltages pose a shock hazard.
7. Never input voltage or current which exceeds the specified limit. If the range
of the measured value is unknown, the maximum range should be selected.
8. Before measuring the resistance, diode and continuity , switch off the power
supply of the circuit, and fully discharge all capacitors to avoid inaccurate
measurement.
9. When the “ ” symbol appears on the LCD, please replace the batteries in
time to ensure measurement accuracy. If the meter is not in use for a long
time, please remove the batteries.
10.Do not change the internal circuit of the meter to avoid damage to the meter
and user!
11.Do not use or store the meter in high temperature, high humidity, flammable,
explosive or strong magnetic field environments.
12.Clean the meter casing with a soft cloth and mild detergent. Do not use
abrasives or solvents!

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1. Clamp jaws
2. Hand guard
3. LED indicator light
4. Jaw opening trigger
5.
6. LCD display
7. Function buttons
8. NCV sensor
9. FLIGHT button
10.Flashlight LED light
11.Battery cover
12.
Function dial
Input jacks
V. External Structure (Picture 1)
VI. LCD Display
(Picture 2, Picture 3, Picture 4)
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3.
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8 9 10
11 12 13 14
Picture 2 UT205E
Picture 1
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
Low battery
Diode test
High voltage
Auto power off
AC signal
DC signal
Data hold
Relative value
Continuity test
Unit
Auto range
Max measurement
Min measurement
NCV

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2.
3.
4.
5.
6.
7.
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9.
10.
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18.
19.
Remark 1: Regarding the range of the flexible current probe, the analog bar is
defined as follows.
Description
One segment represents 1.00A
One segment represents 10.0A
One segment represents 100A
Range
30.00A
300.0A
3000A
Picture 3 UT207B
Picture 4 UT206B/UT208B
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
Low battery
Inrush current measurement
High voltage
Auto power off
Relative value
AC signal
DC signal
Data hold
DC current zero
Diode test
Continuity test
NCV
Low impedance measurement
Unit
Analog bar
Auto range
Max measurement
Min measurement
Low pass filter measurement
Low battery
Inrush current measurement
High voltage
Auto power off
Relative value
AC signal
DC signal
Flexible current probe
Data hold
DC current zero
Diode test
Continuity test
NCV
Low impedance measurement
Unit
Range indicator for the flexible
current probe
Analog bar
Auto range
Max measurement
Min measurement
Temperature measurement
Low pass filter measurement

功能档位
Ω
Hz
%
℃/℉
NCV
LPF V
LoZ V
OFF
/ /
/ /
11 12
VII. Function Dial and Function Buttons
Description
AC/DC current measurement
AC/DC voltage measurement
Resistance measurement
Diode test
Continuity test
Capacitance measurement
Frequency measurement
Duty ratio measurement
Temperature measurement
Non-contact AC voltage sensing
Measurement by flexible current probe
Low pass filter measurement for AC voltage
Low impedance measurement for AC voltage
Power off
Dial Position
2. Function Buttons
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1.Function Dial Note:
Short press: pressing a button for less than 2s.
Long press: pressing a button for more than 2s.
1) SELECT Button
Short press: switch between functions for each dial position.
Long press: enable/disable the LPF function in voltage mode.
2) HOLD/¤ Button
Short press: turn on/off data hold.
Long press: turn on/off backlight.
3) MAX/MIN Button
Short press: enter maximum/minimum measurement mode (no auto power off
function in this mode).
Long press: exit maximum/minimum measurement mode. Only valid for ACV,
LoZ V~, DCV, ACA, DCA, Ω, CAP, °C/°F, and measurement by flexible current
probe.
4) REL or REL ZERO Button
Short press: enter/exit the relative value measurement mode.
LCD would display “ ”.
Displayed value = measured value - reference value
Only valid for ACV, DCV, ACA, Ω and CAP (in the case of CAP, the REL button
is used to clear the base).
In the DCA measurement mode, short press the REL ZERO button to enter/exit
the zero mode.
5) RANGE Button
Short press: enter the manual range mode and change the range.
Long press: Long press or turn function dial to exit manual range mode.
Only valid for ACV, LPF ACV, LoZ V~, DCV, ACA, DCA, CAP (UT205E only),
and Ω.

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VIII. Specifications
1. General Specifications
Max display: ------------------------- 6000 counts
Polarity display: --------------------- Auto
Overload display: ------------------ “OL” or “-OL”
Low battery indication: ------------ “ ” is displayed.
Sampling rate: ---------------------- 3 times/s
Sensor type: ------------------------- Coil induction (UT205E/UT206B)
Hall effect sensor (UT207B/UT208B)
Test position error: ---------------- If the source under test is not placed at the
center of the clamp jaws when measuring current,
±1.0% additional error in reading may be produced.
Jaw opening: ------------------------ 42mm
Battery: ------------------------------- 3×1.5V AAA
Auto power off: ---------------------- 15 minutes (can be disabled)
Dimensions: -------------------------- 272mm×81mm×43.5mm
Weight (including batteries): ----- About 492g (UT205E/UT206B),
447g (UT207B/UT208B)
2. Environmental Specifications
Operating altitude:----------------------------- 2000m
Safety standards:----------------------------- IEC61010-1, IEC61010-2-032,
IEC61010-2-033;
CAT III 1000V, CAT IV 600V
Pollution degree:------------------------------- 2
Operating temperature and humidity:----- 0°C~30°C (≤80%RH), 30°C~40°C
(≤75%RH), 40°C~50°C (≤45%RH)
Storage temperature and humidity:------ -10°C~60°C (≤80%RH)
Electromagnetic compatibility:-------------- When RF=1V/m:
overall accuracy = specified accuracy
+ 5% of range
When RF>1V/m: not specified
3. Electrical specifications
Accuracy:--------------------------------------- ± (a% of reading + b digits),
1 year calibration cycle
Ambient temperature:----------------------- 23°C±5°C
Ambient humidity:---------------------------- ≤80%RH
Note:
To ensure measurement accuracy, the operating temperature should be within
18°C~28°C and the fluctuation range should be within ±1°C. When the temperature
is <18°C or >28°C, add temperature coefficient error 0.1 x (specified accuracy)/°C.
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
6) Hz/INRUSH Button
Short press: enter/exit the frequency measurement mode.
Only valid for ACV, LPF ACV, LoZ V~, ACA and measurement by flexible current
probe.
Long press: user has the option to select proper range with RANGE button first,
or simply long press this button to enter the inrush current measurement mode
(measurement time~100ms). Long press this button again to exit the inrush
current measurement mode.
Inrush current can also be measured with flexible current probe (UT206B/UT208B).
7) Hz Button (UT205E only)
Short press: enter/exit the frequency measurement mode.
8) FLIGHT Button
Short press: turn on/off the flashlight.

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1) AC Current ( )
1000V DC/AC
Range
60.00A
600.0A
1000A
Accuracy
± (2.0%+5), for UT205E/UT206B
± (2.0%+9), for UT207B/UT208B
± (2.0%+5)
Resolution
0.01A
0.1A
1A
Overload
Protection
Display: True RMS
Accuracy guarantee: 5%~100% of range. Open circuit allows least significant
digit ≤10.
Frequency response: 50Hz~60Hz (UT205E/UT206B),
40Hz~400Hz (UT207B/UT208B)
When the measured current is above 500A, the continuous measurement time
cannot exceed 60s (UT205E/UT206B).
The AC crest factor will reach 3.0 at 3000 counts while only reach ≤1.5 at
6000 counts. The additional error should be added according to the crest
factor of a non-sinusoidal wave :are
a) Add 4% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
c) Add 7% when crest factor is 2.5~3
For current frequency monitoring, the resolution is 0.1Hz and accuracy is
± (0.1%+3). The input amplitude should be ≥10% of range.
2) Inrush Current ( )
Range
60.00A
600.0A
1000A
30.00A
300.0A
3000A
Resolution
0.01A
0.1A
1A
0.01A
0.1A
1A
Inrush current
(flexible current
probe)
Function
Inrush current
(ACA)
Accuracy
± (10%+10)
± (10%+10)
Overload
Protection
1000A
3000A
measurement time ~ 100ms.
3) DC Current ( )
Range
60.00A
600.0A
1000A
Resolution
0.01A
0.1A
1A
Accuracy
± (2.0%+5)
Overload Protection
1000A
Accuracy guarantee: 5%~100% of range
Press the REL ZERO button to remove any DC offset that could affect the
accuracy of reading.
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual

17 18
4 AC Voltage ) ( )
Range Resolution Accuracy Overload Protection
1000A
6.000V
60.00V
600.0V
1000V
0.001V
0.01V
0.1V
1V
± (1.2%+3)
± (1.0%+8)
Display: True RMS
Accuracy guarantee: 5%~100% of range. Short circuit allows least significant
digit ≤5.
Input impedance: ≥10MΩ
Frequency response: 40Hz~400Hz
The AC crest factor will reach 3.0 at 3000 counts while only reach ≤1.5 at
6000 counts. The additional error should be added according to the crest
factor of a non-sinusoidal wave are:
a) Add 4% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
c) Add 7% when crest factor is 2.5~3
For voltage frequency monitoring, the resolution is 0.1Hz and accuracy is
± (0.1%+3). The input amplitude should be ≥10% of range.
5 LPF ACV )
Range Resolution Accuracy Overload Protection
1000A
± (2.0%+5)
600.0V
1000V
0.1V
1V
Display: True RMS
Accuracy guarantee: 5%~100% of range. Short circuit allows least significant
digit ≤5.
Input impedance: ≥10MΩ
Frequency response: 40Hz~200Hz
The AC crest factor will reach 3.0 at 3000 counts while only reach ≤1.5 at 6000
counts. The additional error should be added according to the crest factor of
a non-sinusoidal wave as follows:
a) Add 4% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
c) Add 7% when crest factor is 2.5~3
The -3dB frequency of LPF is about 2.5kHz
Only manual range for LPF ACV. Use the RANGE button to change the range.
For voltage frequency monitoring, the resolution is 0.1Hz and accuracy is
± (0.1%+3). The input amplitude should be ≥10% of range.
6 LoZ V~ )
Range Resolution Accuracy Overload Protection
1000A
± (2.0%+5)
600.0V
1000V
0.1V
1V
Display: True RMS
Accuracy guarantee: 5%~100% of range. Short circuit allows least significant
digit ≤5.
Input impedance: About 2kΩ
Frequency response: 40Hz~400Hz
The AC crest factor will reach 3.0 at 3000 counts while only reach ≤1.5 at
6000 counts. The additional error should be added according to the crest
factor of a non-sinusoidal wave as follows:
a) Add 4% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
c) Add 7% when crest factor is 2.5~3
When the measured voltage is above 220V, the continuous measurement
time cannot exceed 30s and the rest interval should be more than 30s.
For voltage frequency monitoring, the resolution is 0.1Hz and accuracy is
± (0.1%+3). The input amplitude should be ≥10% of range.
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual

19 20
9) Continuity ( )
Range Resolution Accuracy Overload Protection
1000A
Open circuit: Resistance
≥70Ω, no beep
Well-connected circuit:
Resistance ≤30Ω,
consecutive beeps
600.0Ω 0.1Ω
Open circuit voltage: About 1V
Resistance value is between 30Ω and 70Ω, the Buzzer maybe beep
10) Diode ( )
Range Resolution Accuracy Overload Protection
1000A
Open circuit voltage:
About 3V
Measurable PN junction:
Forward voltage drop ≤3V
For silicon PN junction,
the normal value is
generally about 0.5~0.8V.
6.000V 0.001V
11) Capacitance ( )
Range Resolution Accuracy
± (4.0%+5)
± (10.0%+9)
Overload Protection
1000A
± (4.0%+25)
60.00nF
600.0nF
6.000μF
60.00μF
600.0μF
6.000mF
60.00mF
0.01nF
0.1nF
0.001μF
0.01μF
0.1μF
0.001mF
0.01mF
7) DC voltage ( )
Range Resolution Accuracy
± (0.5%+5)
Overload Protection
1000A
600.0mV
6.000V
60.00V
600.0V
1000V
0.1mV
0.001V
0.01V
0.1V
1V
± (0.8%+3)
Input impedance: ≥10MΩ
Accuracy guarantee: 5%~100% of range. Short circuit allows least significant
digit ≤5.
8) Resistance Ω ( ）
Range Resolution Accuracy
± (1.0%+2)
± (2.0%+8)
Overload Protection
1000A
± (1.0%+3)
600.0Ω
6.000kΩ
60.00kΩ
600.0kΩ
6.000MΩ
60.00MΩ
0.1Ω
0.001kΩ
0.01kΩ
0.1kΩ
0.001MΩ
0.01MΩ
Measurement result = displayed value – resistance of shorted test leads
Open circuit voltage: About 1V
Accuracy guarantee: 5%~100% of range
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual

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Measurement result = displayed value – capacitance of open-circuit test leads
For capacitance ≤1μF, it is recommended to use “REL” measurement mode.
Accuracy guarantee: 5%~100% of range
12) Temperature (°C/°F)
-40℃~300℃
300℃1000℃~
-40℉572℉~
573℉1832℉~
0.1℃
1℃
0.2℉
1℉
±(1.0%+20)
±( )1.0%+2
±( )1.0%+40
±( )1.0%+4
Range
Range
Resolution
Resolution
Accuracy
Accuracy
Overload Protection
Overload Protection
Overload Protection
1 hour of cool down.
Only K-type thermocouple is applicable.
If the ambient temperature in the meter differs by ±5 °C, the accuracy can
only be guaranteed after
Open circuit display: “OL”
13) Frequency/Duty Ratio (Hz%)
10Hz 1 MHZ~
10.0% 90.0%~
0.01Hz 1K Hz~
0.1%
±(0.1%+3)
±( )2.6%+7
Frequency input amplitude:
10Hz~100kHz: 250mVrms ≤ input amplitude ≤ 20Vrms
100kHz~1MHz: 600mVrms ≤ input amplitude ≤ 20Vrms
Duty ratio:
10%~90%: for square waves of 10Hz~1kHz
30%~70%: square waves of 1kHz~10kHz
2Vpp≤ input amplitude ≤20Vpp
for
14) Non-contact AC voltage sensing (NCV)
1000V
1000V
1000V
NCV
Range Accuracy
IX. Operating Instructions
1.Related Measurement of AC Current (Picture 5)
Picture 5
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
Bring the NCV sensor (upper tip) close
to a wire to start sensing. When no
voltage is sensed, the LCD displays
“EF”. As the intensity of the detected
voltage increases, more segments “—”
will be displayed, and higher frequently
occurs for buzzer and flashing LED.

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AC Current Measurement Note:
2. DC Current Measurement (Picture 5)
Note:
The current measurement must be taken within 0°C~40°C. For DC current
measurement, if the reading is positive, the direction of current is from top to
bottom (from panel to cover). Do not suddenly release the trigger, as the impact
will change the reading for a short time.
withinTo ensure measurement accuracy, center the conductor in jaws. Otherwise,
±1.0% additional error in reading will be produced.
After DC current (especially large current) measurement, the open circuit base
may be too large. Please do an AC current test to eliminate the residual magnetic
signal generated by the jaws.
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1) Turn the function dial to A~, , or position.
2) Press the trigger to open clamp jaws and fully enclose one conductor (only
one conductor can be measured at a time). For optimum results, center the
conductor in the jaws.
Current Frequency Measurement
1) When the function dial is in the AC current position, short press the Hz or Hz/
INRUSH button to enter the frequency measurement mode.
2) Short press the Hz or Hz/INRUSH button again to exit the frequency
measurement mode.
Inrush Current Measurement (for AC current)
1) User has the option to select proper range with RANGE button first, or simply
long press the Hz/INRUSH button to enter the inrush current measurement
mode.
2) Start the device under test and measure the instantaneous inrush current of
the device.
4) Long press the Hz/INRUSH button again to exit the inrush current measurement
mode.
Inrush current is the highest AC current (true RMS) within 100ms of start time,
as shown below.
The current measurement should be taken within 0°C~40°C. Do not suddenly
release the trigger, as the impact may change the reading for a short time.
To ensure measurement accuracy, center the conductor within the jaws.
Otherwise, ±1.0% additional error in reading may be produced.
When testing high current, the clamp will vibrate slightly, which is a normal
phenomenon.
1) Turn the function dial to the or position.
2) Short press the SELECT button to switch to DC current measurement. If the
display on the LCD is not zero, short press the REL ZERO button to enable
zero clearing.
3) Press the trigger to open the clamp jaws, and fully enclose one conductor
(only one conductor can be measured at a time). For optimum results, center
the conductor within the jaws.

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3. Measurement by Flexible Current Probe (Picture 6)
AC Current Measurement
Current Frequency Measurement
Picture 6
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1) Turn the function dial to the or position.
2) Insert the flexible current probe into the and COM jacks.
3) The meter will automatically switch to the flexible current probe with the
extended current range, displayed on LCD.
1) After connecting the flexible current probe, short press the Hz/INRUSH button
to enter the frequency measurement mode.
2) Short press the Hz/INRUSH button again to exit frequency measurement mode.
Inrush Current Measurement
1) After connecting the flexible current probe, short press the RANGE button to
select the proper range.
2) Long press the Hz/INRUSH button to enter the inrush current measurement
mode.
3) Start the appliance under test and measure the instantaneous inrush current
of the appliance.
4) Long press the Hz/INRUSH button again to exit the inrush current measurement
mode.
Inrush current is the highest AC current (true RMS) within 100ms of start time,
as shown below.

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4. Related Measurement of AC Voltage and
LPF ACV (Picture 7)
AC Voltage Measurement
Note:
Do not input voltage above 1000V. Although it is possible to measure higher
voltage, it may damage the meter.
Be cautious to avoid electric shock when measuring high voltage.
After completing the measurement, disconnect the test leads from the circuit
under test.
When the measured voltage is above 30V, the LCD will display the high voltage
alarm prompt “ ”.
Picture 7
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1) Insert the red test lead into , , or jack, and black test lead
into the COM jack.
2) Turn the function dial to V~ or position.
3) Short press the SELECT button to switch to AC voltage measurement if
required, and connect the test leads with the measured load or power supply
in parallel.
Voltage Frequency Measurement
1) When the function dial is in the AC voltage, short press Hz or Hz/INRUSH
button to enter the frequency measurement mode.
2) Short press Hz or Hz/INRUSH button again to exit frequency measurement
mode.
LPF ACV Measurement
1) When the function dial is in the AC voltage position, long press SELECT button
to enable LPF ACV function. LPF can measure combined sine wave signals
produced by inverters and variable frequency drives, as shown below.
2) After enabling the LPF ACV function, short press the Hz/INRUSH button to
enter the frequency measurement mode.
3) Short press the Hz/INRUSH button again to exit the frequency measurement
mode.

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5. DC Voltage Measurement (Picture 7)
6. LoZ Measurement (Picture 8)
LoZ ACV Measurement
Note:
Do not input voltage above 1000V. Although it is possible to measure higher
voltage, it may damage the meter.
Be cautious to avoid electric shock when measuring high voltage.
Test known voltage before use to verify whether the product functions correctly.
After using the LoZ function, let the meter rest for 3 minutes before next use.
LoZ voltage measurement eliminates ghost voltage for more accurate
measurement.
When the measured voltage is above 30V, the LCD will display the high
voltage alarm prompt “ ”.
Picture 8
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1) Insert the red test lead into the , or jack, and black test lead
into the COM jack.
2) Turn the function dial to the or position.
3) Short press the SELECT button to switch to DC voltage measurement if
required, and connect the test leads with the measured load or power supply
in parallel.
4) Read the voltage value on the display.
Note:
Do not input voltage above 1000V. Although it is possible to measure higher
voltage, it may damage the meter.
When measuring at 600mV range, use “REL” measurement mode to get
accurate readings. Short-circuit the test leads, and then short press the REL or
REL ZERO button. Read the measured voltage after the voltage of the short-
circuited test leads is automatically subtracted.
Be cautious to avoid electric shock when measuring high voltage.
After completing the measurement, disconnect the test leads from the circuit
under test.
When the measured voltage is above 30V, the LCD will display the high voltage
alarm prompt “ ”.
LoZ ACV Frequency Measurement
1) When the function dial is in the LoZ ACV position, short press the Hz/INRUSH
button to enter the frequency measurement mode.
2) Short press the Hz/INRUSH button again to exit the frequency measurement
mode.
1) Insert the red test lead into or jack, and black test lead into the
COM jack.
2) Turn the function dial to the LoZ V~ position, and connect the test leads with
the measured load or power supply in parallel.

31 32
7. Resistance Measurement (Picture 9)
Picture 9
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1) Insert the red test lead into the , or jack, and black test
lead into the COM jack.
2) Turn the function dial to the or position, short press the SELECT button
switch to resistance measurement if required, and connect the test leads to
both ends of the measured resistance in parallel.with
Note:
If the measured resistor is open or the resistance exceeds the maximum range,
the LCD will display “OL”.
Before measuring the resistance online, switch off the power supply of the
circuit, and fully discharge all capacitors to ensure accurate measurement.
When measuring low resistance, the test leads will produce 0.1Ω~0.2Ω
measurement error. Use “REL” measurement mode to get accurate readings.
Short-circuit the test leads, and then short press the REL or REL ZERO button.
After the meter automatically subtracts the resistance of the short-circuited test
leads, the low-resistance measurement can be performed.
If the resistance is not less than 0.5Ω when the test leads are short-circuited,
please check the test leads for abnormalities.
When measuring resistance above 1MΩ, it is normal to take a few seconds to
stablize reading.
Use caution when working with voltage above AC 30Vrms, 42Vpeak or DC 60V.
Those voltages may pose shock hazard.
After completing the measurement, disconnect the test leads from the circuit
under test.
1) Insert the red test lead into the , or jack, and black test
lead into the COM jack.
2) Turn the function dial to or position, short press SELECT button to
switch to continuity test, and connect the test leads with both ends of measured
load in parallel.
3) When the measured resistance ≤30Ω: The circuit is in good conduction
status; the buzzer beeps continuously. When measured resistance ≥70Ω:
there will be no buzzer sound.
Note:
Before measuring the continuity online, switch off the power supply of the
circuit, and fully discharge all capacitors.
Use caution when working with voltage above AC 30Vrms, 42Vpeak or DC 60V.
Those voltages may pose shock hazard.
After completing the measurement, disconnect the test leads from the circuit
under test.
9.Diode Test (Picture 9)
1) Insert the red test lead into the , or jack, and black test
lead into the COM jack. The polarity of the red test lead is “+” and that of the
black test lead is “-”.
2) Turn the function dial to the or position, and short press the SELECT
button to switch to diode test.
8.Continuity Test (Picture 9)

33 34
10. Capacitance Measurement (Picture 10)
Note:
If the measured capacitor is short-circuited or the capacitance exceeds the
maximum range, the LCD will display “OL”.
The analog bar pointer is disabled in capacitance measurement mode. When
measuring capacitance >600μF, it may take some time to steady the readings.
Before measuring, fully discharge all capacitors (especially high-voltage
capacitors) to avoid damage to the meter and user.
After completing the measurement, disconnect the test leads from the circuit
under test.
11.Frequency/Duty Ratio Measurement (Picture 11)
Picture 11
Picture 10
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
3) Connect the red probe with the diode anode, and black with the diode cathode.
4) Read the approximate forward voltage of the diode on the display. For silicon
PN junction, the normal value is generally about 500~800 mV.
Note:
If the diode is open or its polarity is reversed, the LCD will display “OL”.
Before measuring the diode online, switch off the power supply of the circuit,
and fully discharge all capacitors.
Use caution when working with voltage above AC 30Vrms, 42Vpeak or DC 60V.
Such voltage poses a shock hazard.
After completing the measurement, disconnect the test leads from the circuit
under test.
1) Insert the red test lead into the , or jack, and black into the
COM jack.
2) Turn the function dial to the or position, short press the SELECT button
to switch to capacitance measurement, and connect the test leads with both
ends of the measured capacitance in parallel.

35 36
Note:
Do not input voltage higher than 30Vrms to avoid personal injury.
After completing the measurement, disconnect the test leads from the circuit
under test.
12. Temperature Measurement (Picture 12)
Note:
The ambient temperature of the meter should be in the range of 18-28°C,
otherwise it may cause measurement error, especially in low temperature
environments.
Use caution when working with voltage above AC 30Vrms, 42Vpeak or DC 60V.
Such voltage poses a shock hazard.
After completing the measurement, remove the thermocouple.
13. Non-contact AC voltage sensing (NCV) (Picture 13)
Picture 12 Picture 13
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1) Insert the red test lead into the , or jack, and black into the
COM jack.
2) Turn the function dial to the Hz% position, and connect the test leads with
both ends of the measured signal source in parallel.
3) Short press the SELECT button to switch to frequency/duty ratio measurement.
1) Turn the function dial to the °C°F position, and the LCD will display “OL”.
Ambient temperature will be displayed if users short-circuit the test leads.
2) Insert the K-type thermocouple into the meter as shown.
3) Use the temperature sensor to measure object surface, and read the Celsius
temperature value on the LCD after a few seconds.
4) Short press the SELECT button to switch to Fahrenheit temperature
measurement.

37 38
14. Auto Power Off
15. Use of Test Leads
1) Testing in CAT III/CAT IV measurement locations:
Ensure the test lead shields are pressed firmly in place. Failure to use the
CATIII/CATIV shields increases arc-flash risk.
2) Testing in CAT II measurement locations:
CAT III/CAT IV shields may be removed for CAT II locations. This will allow testing
on recessed conductors such as standard wall outlets. Take care not to lose the
shields.
X. Maintenance
Warning: Before opening the rear cover of the meter, remove the test leads
to avoid electric shock.
1.General Maintenance
1) The maintenance and service must be implemented by qualified professionals
or designated departments.
2) Clean the meter casing with a soft cloth and mild detergent. Do not use
abrasives or solvents!
2.Battery Replacement (Picture 14)
1) Turn off the meter and remove the test leads from the input jacks.
2) Unscrew and remove the battery cover.
3) Replace with 3 standard AAA batteries according to the polarity indication.
4) Secure the battery cover and tighten the screw.
1
2
3
3.Test Lead Replacement
If the insulation on the test lead is damaged, replace it.
Warning:
Test leads used for MAINS measurement should meet EN 61010-031 standard,
rated CAT III 1000V, 10A or better.
Picture 14
UT205E/UT206B/UT207B/UT208B User Manual UT205E/UT206B/UT207B/UT208B User Manual
1) Turn the function dial to the NCV position, and bring the NCV sensor close to
the wire under test.
2) If there is AC voltage or electromagnetic field in the space, the LCD will display
the sensing intensity from weak to strong by “—”. At the same time, the buzzer
will beep intermittently and the LED indicator light will be on. When no voltage
is sensed, the LCD displays “EF”.
During measurement, if there is no operation of the function dial or any button
for 15 minutes, the meter will automatically shut down to save power. Users can
wake it up by pressing any button (except FLIGHT button). To disable the auto-
off function, press and hold the SELECT button in the off state and turn on the
meter.