
P/N:110401108650X
UT201R/UT202R/UT202F
AC Clamp Meter User Manual
Preface
Thank you for pu rchasing the ne w AC clamp meter. In order to u se
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 , contaminatio n or improper h andling. The dea ler shall
not be entitled to give any other warranty on behalf of Uni-T rend. 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. As some
countries or regions do not allow limitations on implied warranties and
incidental or subsequent damages, the above limitation of liability may
not apply to you.
I. Overview
The UT201R, UT202R, and UT202F are true RMS AC clamp meters.
Th ey ar e d e si gn ed ac c or di ng to E N6 10 10 -1 C AT II 60 0V /
CAT III 300V safety standards. These meters come with full-featured
protec tion wh ich ens ures us ers a sa fe and reliab le meas uremen t
experien ce. Aside fro m all the n ormal fea tures of AC cl amp meter,
these meters also include high voltage frequency measurement, fast
capacitance measurement, audio visual NCV detection, and plenty
of additional safety features.
II. Features
• True RMS measurement
• Audio visual NCV detection
• Maximum measurable voltage: 600V;
• High voltage frequency range: 10Hz~10kHz
• Current (UT201R/UT202R: 400A, UT202F: 600A) frequency
response: 50Hz~100Hz; current frequency measurement function
• Large capacitance (4mF) and temperature measurement (UT202R only)
• Very large capacitance (60mF), low voltage frequency (10MHz)
• Large LCD and fast refresh rate (3 times/s)
• Response time for capacitance measurement: less than 3s for 1mF; ≤
about 6s for ≤10mF; about 8s for 60mF≤
• Full-featured false detection protection for up to 600V (30kVA) energy
surge; overvoltage and overcurrent alarm functions
• The power consu mption of the me ter is about 1. 8 mA. The circuit
has an automatic power saving function. The consumption in sleep
state is <11uA, which effectively extends the battery life to 400 hours.
Warnin g: Bef ore us ing th e mete r, pleas e read the Sa fety
carefully. Instructions
III. 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 temperature probe (UT202R only) 1 pc -------d) Cloth bag 1 pc -------------------------------------------------If any of the above is missing or damaged, please contact your supplier
immediately.
IV. Safety Instructions
WARNING
To ensure safe operation and service of the tester, follow these
instructions. Failure to observe these warnings can result in severe
injury or death.
The meter is designed according to EN61010-1/61010-2-030/
61010-2-033 and electromagnetic radiation protection EN61326-1
safety standards, and conforms to CAT II 600V, CAT III 300V, double
insulation and pollution grade II.
Note:
Case the meter is not used in accordance with the operating instructions,
the protection provided by the meter may be weakened or lost.
1.Before each use verify tester operation by measuring a known voltage.
2.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 use the meter.
3.Do not use the meter i f the re ar cove r or the batter y cover is not
covered up, or it will pose a shock hazard!
4.Keep fingers behind the finger guards and away from the metal probe
contacts when making measurements.
5.The function switch should be placed in the correct position before
measurement. It is forbidden to change the position during
measurement to avoid damage to the meter!
6.Do not appl y voltage ov er 600V betw een any mete r terminal a nd
earth ground to prevent electric shock or damage to the meter.
7.Use caution when working with voltages above AC 30Vr.m.s,
or DC 60V. Such voltages pose a shock hazard.42Vpeak
8.Nev er u se th e te ster on a c ircuit w ith v olt ages tha t exc eed the
based rat ing of this tester. If the range of th e measuredcategory
unknown, the maximum range should be selected. value is
9.Before measuring the resistance, diode and continuity online, switch
off the power supply of the circuit, and fully discharge all capacitors
to avoid inaccurate measurement.
10.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.
11.Do not change the internal circuit of the meter to avoid damage to the
meter and user!
12.Do not use or store the meter in high temperature, high humidity,
flammable, explosive and strong magnetic field environments.
13.Clean the meter casing with a soft cloth and mild detergent. Do not use
abrasives or solvents!
V. Electrical Symbols
Description
Symbol
Caution, possibility of electric shock
Alternating current
Direct current
Equipment protected throughout by DOUBLE
INSULATION or REINFORCED INSULATION
Earth (ground) TERMINAL
Warning or Caution
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 test and measuring circuits connected
directly to utilization points (socket outlets and similar
CAT II
points) of the low-voltage MAINS installation.
It is applicable to test and measuring circuits connected
CAT II I
to the distribution part of the building's low-voltage
MAINS installation.
VI. General Specifications
1. Max display: 4099 (UT201R/UT202R), 6099 (UT202F)
2. Polarity display: Auto
3. Overload display: “OL” or “-OL”
4. Low battery indication: The “ ” symbol is displayed.
5. Low battery shutdown prompt: The “Lo.bt” interface appears on the LCD
and lasts for about 1 0s, the buz zer beeps three time s, and the m eter
automatically shuts down.
6. 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
will be produced.
7. Drop protection: 1m
8. The maximum size of jaw opening: 28mm in diameter
9. Battery: AAA battery 1.5V×2
10.Auto p ower off : If the re is no o perati on of th e functi on swit ch or any
button for 15 minutes, the meter will automatically power off. This function
can be turned off as needed.
11.Dimensions: 215mm×63.5mm×36mm
12.Weight: About 248g (including batteries)
13.Altitude: 2000m
14.Operating temperature and humidity: 0°C~30°C ( 80%RH), 30°C~40°C ≤
( 75%RH), 40°C~50°C ( 45%RH)≤ ≤
15.Storage temperature and humidity: -20°C~60°C ( 80%RH)≤
16.Electromagnetic compatibility:
RF=1V/m, overall accuracy = specified accuracy + 5% of range
RF>1V/m, no specified calculation
Note:
• The current measurement must be taken within 0°C~40°C. Do not
suddenly release the trigger, as the impact will change the reading
for a short time.
• To ensure measurement accuracy, center the conductor in the jaws.
Otherwise, ±1.0% additional error in reading will be produced.
• When the me asure d curr ent is ≥400A (UT 201R /UT20 2R)/ 60 0A ≥
(UT202 F), the m eter wil l automa tically sound an alarm an d the
high voltage alarm prompt “ ” will automatically flash.
• If the LCD displays “OL”, it indicates that the current is over range
and there is a danger of damage to the meter.
2.AC/DC Voltage and Voltage Frequency Measurement (Picture 3)
1) Inse rt the r ed test lead in to the “ ” jack, black i nto
the “ COM ” jack.
2) Turn the function switch to the AC/DC voltage position, and connect
the test leads with the measured load or power supply in parallel.
Note:
• Do not input voltage above 600V. Although it is possible to measure
higher voltage, it may damage the meter.
• Be cautious to avoid electric shock when measuring high voltage.
• When the measured voltage is ≥30V (AC) or ≥60V (DC), the LCD
will display the high voltage alarm prompt “
3.Resistance Measurement (Picture 4)
1) Insert the red test lead into the “ ” jack, black into
the “ ” jack.COM
2) Turn the f unctio n switch to the “ Ω” posit ion, pr ess the S ELECT
button to select res istance m easuremen t, and conn ect the te st
leads with both ends of the measured resistance in parallel.
AC current
measurement
Picture 2
Red Black
Picture 3
Red Black
Current frequency
measurement
Hz
Capacitance
Continuity
Diode
Resistance
VII. External Structure (Picture 1)
8
Picture 1
1
2
3
4
6
7
9
10
Note:
• If t he m eas ure d res ist or i s op en or the res ist ance exc eed s th e
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 avoid inaccurate
measurement.
• If the res ist anc e is not les s th an 0 .5Ω whe n th e te st lead s ar e
short-circuited, please check the test leads for looseness or other
abnormalities.
• Do not input voltage higher than 30V to avoid personal injury.
4.Continuity Test (Picture 4)
1) Insert the red test lead into the “ ” jack, black into
the “ ” jack.
2) Turn the function switch to the “ ” position, press the SELECT
button to select continuity measurement, and connect the test leads
with both ends of the measured load in parallel.
3) Measured resistance <10Ω: The circuit is in good conduction status;
the buzzer beeps cont inuously. Measur ed resista nce >31Ω: The
buzzer makes no sound.
Note:
• Before measuring the continuity online, switch off the power supply
of the circuit, and fully discharge all capacitors.
• Do not input voltage higher than 30V to avoid personal injury.
5. Diode Test (Picture 4)
1) Insert the red test lead into the “ ” jack, black into
the “ COM ” jac k. The polarity o f the red test l ead is “+” and t hat
the black test lead is “-”.of
2) Turn the function switch to the “ ” position, press the SELECT
button to select di ode measur ement, and connect t he test lea ds
with the positive and negative poles of the measured diode.
3) 0.08V ≤ re ading <1.2V: The buzze r makes one beep indicating
the n ormal ity o f the d iode. Read ing <0 .08V: Th e buz zer be eps
contin uously i ndicati ng the da mage of t he diod e. For th e silico n
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.
• Do not input voltage higher than 30V to avoid personal injury.
Picture 4
1.NCV sensing end
2.Clamp jaws
3.Hand guard
4.LED indicator
5.Jaw opening trigger
6.Function switch
7.LCD display
8.Function buttons
9.Positive (+) input jack
10.COM (negative -) input jack
5
VIII. Button Description
1.SELECT Button
In the composite function position, press this button to switch between the
corresponding measurement functions; in the AC/DC/Hz position (UT202R/
UT20 2F) , sho rt p ress this but ton t o sw itch bet ween the AC and DC
fun cti ons , and lo ng p ress (a bout 2s ) this b utt on to en ter/ex it the H z
measurement function.
2.HOLD/BACKLIGHT Button
Short press th is button to ent er/exit the dat a hold mode, an d long press
(ab ou t 2s ) t his bu tto n to turn o n/o ff the bac kl igh t ( the ba ckl igh t will
automatically turn off after 60s).
3.MAX/MIN Button
Short press this button to enter the maximum/minimum measurement mode
and long press this button to exit (only valid for AC/DC voltage, AC current,
resistance and temperature measurement).
4.REL Button (UT202R/UT202F)
In the ca pacitan ce and v oltage p osition s, press this bu tton to s tore the
current reading as a reference for future readings. When the LCD display
value is reset to zero, the stored reading will be subtracted from the future
readings. Press this button again to exit the relative value mode.
IX. Operating Instructions
1.AC Current/Current Frequency Measurement (Picture 2)
1) Select the AC current range (4A/6A, 40A/60A or 400A/600A)
2) Press the trigger to open the clamp jaws, and fully enclose one conductor.
3) Only one conductor can be measured at a time, otherwise the
measurement reading will be wrong.

6. Capacitance Measurement (UT202R/UT202F, Picture 4)
1) Insert the red test lead into the “ ” jack, black into
the “ COM ” jack.
2) Turn the function switch to the “ ” position, and connect the test
leads with the measured capacitance in parallel. For capacitance
≤100nF, it is recommended to use “REL” measurement mode.
Note:
• If the measured capacitor is short-circuited or the capacitance exceeds
the maximum range, the LCD will display “OL”.
• When me asurin g capac itance > 400μF, it may t ake som e time t o
steady the readings.
• Befo re me asur ing, fully disc harg e all capa citor s (es peci ally for
capacitors with high voltage) to avoid damage to the meter and user.
7.Temperature Measurement (UT202R only, Picture 5)
1) Insert the positive pole of the temperature probe into the
“ ” jack and negative pole into the “COM” jack.
2) Turn the function switch to the “°C/°F” position and the LCD will
display room temperature.
3) Fix the temperature probe on the object to be tested, and read the
temperature value of the tested object directly from the display
after a few seconds.
4) Press the SELECT button to switch between °C and °F.
Red
Black
Picture 5
Note:
• The ambient temperature of the meter should be in the range of
18-28°C, otherwise it will cause measurement error.
• The positive and negative poles of the temperature probe should
be properly connected. Do not measure non-insulated live objects
to avoid incorrect readings.
• Do not input voltage higher than 30V to avoid personal injury.
8. Non-contact AC Electric Field Sensing (NCV, Picture 6 )
The electric field sensing sensitivity is divided into two levels (“EFHI”
and “EFLo”). The meter defaults to “EFHI”. Select different sensitivity
levels for me asurement acc ording to the intensity of t he measured
electric field. When the electric field is around 220V (AC) 50Hz/60Hz,
select "EFHI"; when the electric field is around 110V (AC) 50Hz/60Hz,
select “EFLo”.
1) Turn the function switch to the NCV position.
2) Bring the NCV sensing end of the clamp jaws close to a charged
electric field (socket, insulated wire, etc.). The LCD will display the
segment "- ", the buzze r will beep, and the red L ED will flas h. As
the intensity of the measured electric field increases, the more the
segments (----) are displayed, and the higher the frequency at which
the buzzer beeps and the red LED flashes.
NCV
Note:
• Use the NCV sensing end of the clamp jaws to approach the measured
electric field, otherwise the measurement sensitivity will be affected.
• When the measured electric field voltage is ≥100V (AC), observe
whether the conductor of the measured electric field is insulated to
avoid personal injury.
10.Probe usage
TESTING IN CAT III MEASUREMENT LOCATIONS
Ensure the test lead shield pressed firmly in place. Failure to use
the CAT III shield increases arc-flash risk.
TESTING IN CAT II MEASUREMENT LOCATIONS
CAT III 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.
11. Others
1) Auto power off: During measurement, if there is no operation of the
function switch or any button for 15 minutes, the meter will automatically
shut down to save power. You can wake it up by pressing any button
or rest art it a fter tur ning the functi on switc h to the OFF posi tion.
To disable the auto power off function, press and hold the SELECT
button in the off state, and then turn on the meter . To resume the
auto power off function, restart the meter after shutdown.
2) Buzzer: When any button is pressed or the function switch is turned,
if it is v alid, the b uzzer wil l make one beep (abo ut 0.25s) . When
measuring voltage or current, the buzzer will beep intermittently to
indicate the over range.
3) Low bat tery dete ction: The b attery vo ltage wil l be autom atically
detected as long as the meter is on. If it is lower than 2.5V, the LCD
will display the “ ” symbol.
4) Low battery shutdown function: When the battery voltage is lower
than 2.4V, the LCD displays the “ ” symbol, the “Lo.bt” interface
appears a nd lasts f or about 10 s, the buzz er makes c onsecutiv e
beeps three tim es, and then the meter automatic ally shuts down
(no interface is displayed).
Picture 6
X. Technical Specifications
Accu rac y: ± (a% o f re adi ng + b dig its ), 1 y ear cal ibra tion per iod
Ambient temperature and humidity: 23°C±5°C; ≤80%RH
Temperature coefficient: To ensure measurement accuracy, operating
temperature should be within 18°C ~28°C and the fluctuation range
shoul d be wi thin ±1 °C. Wh en the tempe ratur e is <1 8°C or >28°C,
add temperature coefficient error 0.1 x (specified accuracy)/°C.
1.AC Cur re nt
Range
UT201R
UT202R
4.000A
40.00A
400.0A
Current frequency
monitoring:
50Hz~100Hz
Frequency response: 50Hz~100Hz
•
• For 4A range, open circuit allows least significant digit <3.
• Accuracy guarantee range: 1%~100% of range
• The input current amplitude of the current frequency should be >2A.
UT202F
6.000A
60.00A
600.0A
Resolution
0.001A
0.01A
0.1A
0.1Hz
Accuracy
±(4%+10)
±(2%+10)
±(1.0%+5)
Overload Protection
UT201R
UT202F
UT202R
420A 620A
2.AC Volt ag e
Range
UT201R
UT202R
4.000V
40.00V
400.0V
600V
Voltage frequency
monitoring: 10Hz~10kHz
• Input impedance: About 10MΩ
• Frequency response: 45Hz~400Hz, true RMS display
• Accuracy guarantee range: 1%~100% of range; the input voltage amplitude
of the voltage frequency should be >5V.
• The AC crest factor of a non-sinusoidal wave can reach 3.0 at 4000 counts
while can only reach 1.8 at 6000 counts. The additional error should be
added for the corresponding crest factor as follows:
a) Add 3% 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
UT202F
6.000V
60.00V
600.0V
Resolution
0.001V
0.01V
0.1V
1V
0.01Hz~
0.01kHz
Accuracy
±(1.0%+5)
±(0.8%+5)
±(1.0%+5)
Overload
Protection
600Vrms
3.DC Volt ag e
Range
UT201R
UT202R
400.0mV
4.000V
40.00V
400.0V
600V
Input impedance: About 10MΩ
•
• For mV range, short circuit allows least significant digit 5.
• Accuracy guarantee range: 1%~100% of range
UT202F
600.0mV
6.000V
60.00V
600.0V
Resolution
0.1mV
0.001V
0.01V
0.1V
1V
Accuracy
±(0.7%+3)
±(0.5%+2)
±(0.7%+3)
≤
Overload
Protection
600Vrms
4.Frequency/Duty Ratio (UT202F only)
Range
10Hz~
10MHz
0.1 ~
%
99.9%
Resolution
0.01Hz~
0.01MHz
0.1%
Accuracy
±(0.1%+4)
±(3.0 +5)%
Overload Protection
600Vrms
1) Measuring sensitivity:
≤100kHz: 200mVrms ≤ input
amplitude ≤ 30Vrms
>100kHz~1MHz: 600mVrms
≤ input amplitude ≤ 30Vrms
>1MHz~10MHz: 1Vrms ≤ input
amplitude ≤ 30Vrms
2) Duty ratio is only applicable to
the measurement of square wave
≤ 10kHz; amplitude: 1Vp-p
Frequency ≤1kHz Duty ratio:
10.0%~95.0%
Frequency >1kHz Duty ratio:
30.0%~70.0%
5. Resistance
UT201R
UT202R
400.0Ω
4.000kΩ
40.00kΩ
400.0kΩ
4.000MΩ
40.00MΩ
Range
UT202F
600.0Ω
6.000kΩ
60.00kΩ
600.0kΩ
6.000 MΩ
60.00 MΩ
Resolution
0.1Ω
0.001kΩ
0.01kΩ
0.1kΩ
0.001MΩ
0.01MΩ
Accuracy
±(1.0%+2)
±(0.8%+2)
±(2.0%+5)
Overload
Protection
600Vrms
6. Continuity
Range
UT201R
UT202R
400.0Ω 600.0Ω 0.1Ω
UT202F
Resolution
Accuracy
<10Ω: Consecutive
beeps
>31Ω: No beep
Open circuit
voltage: About 2.0V
Overload
Protection
600Vrms
7. Diode
Range
UT201R
UT202R
4.000V 6.000V 0.001V
UT202F
Resolution
Accuracy
Open circuit voltage:
About 2.2V (UT201R
/UT202R)/3.9V
(UT202F)
Measurable PN
junction: Forward
voltage drop ≤2V.
For the silicon PN
junction, the normal
value is generally
about 0.5~0.8V.
Overload
Protection
600Vrms
8.Capa ci ta nc e
Range
UT202R UT202F
4.000nF
40.00nF
400.0nF
4.000uF
40.00uF
400.0uF
4.000mF
• Measured value = displayed value - open circuit value of the test
leads (For capacitance 100nF, it is recommended to use “REL” ≤
measurement mode.)
• For capacitance range, open circuit allows least significant digit 20.≤
6.000nF
60.00nF
600.0nF
6.000uF
60.00uF
600.0uF
6.000mF
60.00mF
Resolution
0.001nF
0.01nF
0.1nF
0.001uF
0.01uF
0.1uF
0.001mF
0.01mF
Accuracy
±(4.0%+10)
±(4.0%+5)
±10%
Overload
Protection
600Vrms
9.Temperature(UT202R only)
Range
-40℃~40℃
40℃~500℃
500℃~1000℃
-40℉~104℉
104℉~932℉
932℉~1832℉
Resolution
1℃
1℉
Accuracy
±4℃
±(1.5%+5)
±(2.0%+5)
±6℉
±(2.0%+6)
±(2.5%+4)
Overload
Protection
600Vrms
10 NCV.
Electric field sensing
Range
sensitivity level
EFLo
NCV
EFHI
• Test results may be affected by different socket designs or wire
insulation thickness.
Accuracy
To sense the wire above 24±6V
and identify whether the mains
socket is charged
To sense the wire above
74V±12V, to identify whether
the mains socket is charged,
or to judge the live/neutral wire
of the socket according to the
intensity of the sensing
XI. Maintenance
Warning: Before opening the rear cover of the meter, remove the
test leads to avoid electric shock.
1.General Maintenance
1) When the meter is not in use, place the function switch in the OFF
position to avoid continuous consumption of battery energy.
2) Clean the meter casing with a soft cloth and mild detergent.
Do not use abrasives or solvents!
3) The maintena nce and servi ce must be imp lemented by q ualified
professionals or designated departments.
2.Battery Replacement (Picture 7)
1) Turn off the meter and remove the test leads from the input terminals.
2) Unscrew the screw of the battery compartment, remove the battery
cover, and replace th e 2 standard AAA batteries acc ording to the
polarity indication.
3) Secure the battery cover and tighten the screw.
Picture 7