Uni-T UT204R Manual

Uni-T Måleudstyr UT204R

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P/N:110401108651X

1. Overview

The UT203R/UT204R are portable true RMS AC/DC clamp meters

with automatic range. They are designed according to EN61010-1

CAT II 600V/CAT III 300V safety standards, and come with full-function

protection which ensures users a safe and reliable measurement

experience. Aside from basic measurement functions, they also have

high precision current scale and high voltage frequency measurement

extension.

Preface

Thank you for purchasing the new . In order to use this clamp meter

product safely and correctly, please read this manual thoroughly,

especially the part. Safety Instruction

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 and improper handling. The dealer shall

not be entitled to give any 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. 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.

2. Features

True RMS measurement

Audio visual NCV electric field detection

High voltage frequency range: 10Hz~60kHz; low voltage frequency

range: 60Hz~10MHz

UT203R AC/DC current range: 40A, 400A, frequency response:

45Hz~400Hz

UT204R AC/DC current range: 60A, 600A, frequency response:

45Hz~400Hz, live/neutral wire detection

ACA/DCA mode memory function for current measurement

Large capacitance (UT203R: 40mF, UT204R: 60mF) and temperature

Tmeasurement (U 204R)

Large LCD and fast refresh rate (3 times/s), capacitance measurement

response time:

1mF: less than 3s; 10mF: about 6s; 60mF: about 8s≤≤ ≤

Full-function false detecting protection for up to 600V (3.6kVA)

energy surge; overvoltage and overcurrent alarm

The power consumption without backlight 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.

Please read the safety and warning parts in this manual

thoroughly.

Caution: Please read the safety instructions carefully before use.

3. Standard Accessories

Open the package and check the below items, if any is missing or

damaged, please contact your supplier immediately:

User manual ----------------------- 1 pc

Test leads --------------------------- 1 pair

K-type temperature probe ------ 1 pc (Only UT204R)

Cloth bag ---------------------------- 1 pc

4. Safety Instructions

6. General Specifications

Max LCD display counts: 4099 (U 203R), 6099 (U 204R)T T

Polarity display: Auto

Overload display: “OL” or “- OL”

Low battery indication: “ ” means low battery

Low battery shutdown prompt: The “Lo.bt” interface appears on LCD

and lasts for about 10s, the buzzer beeps 3 times, and the meter

automatically shuts down.

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.

Drop protection: 1m

The maximum size of jaw opening: 28mm in diameter

Battery: AAA 1.5V battery × 2

Auto power off (adjustable): The meter will auto power off if there is no

operation for 15 min.

Dimensions: 215mm × 63.5mm × 36mm

Weight: About 235g (including batteries)

Altitude: 2000m

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: -20°C~+60°C ( 80%RH)≤

Electromagnetic compatibility: RF=1V/m, overall accuracy=specified

accuracy+5% of range; RF>1V/m, no specified calculation

7. External Structure (Picture 1)

1) NCV sensing end

2) Clamp jaws

3) Hand guard

4) LED indicator

5) Jaw opening trigger

6) Function scale knob

7) LCD display

8) Function buttons

9) Signal input jack (red and positive +)

10)COM input jack (black and negative -)

8. Button Description

SELECT Button

In composite scale, press this button to switch between the corresponding

functions or ranges;

HOLD/BACKLIGHT Button

Short press this button to enter/exit the data hold mode, and long press

(about 2s) this button to turn on/off the backlight.

MAX/MIN Button

(valid for ACV/DCV, ACA/DCA, “C/”F, resistance and capacitance scales)

Short press this button to enter the maximum/minimum measurement mode

and long press this button to exit.

REL Button

(valid for ACV/DCV, DCA, “C/”F and capacitance scales).

Press this button to store 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.

9.Operating Instructions

9.1 AC/DC Current Measurement (Picture 2)

Select the corresponding current range.

Press the trigger to open the clamp jaws, and fully enclose one conductor.

Only one conductor can be measured at a time, or the measurement

reading will be wrong.

Caution:

Do not insert the testing leads during current measurement to avoid

electric shock.

The current measurement must be taken with safeguard protection.

Press the REL button to return to zero before the DC current

measurement, and meanwhile the center hole of jaw should be

perpendicular to the current direction to ensure accuracy.

The open circuit zeroing reading may be relatively large after (high)

DC current measurement. Please perform the AC current detection

again to counteract the remanence signal by alternating electric field.

9.2 AC/DC Voltage and Voltage Frequency (% duty cycle)

Measurement (Picture 3)

Select the corresponding function scale.

Insert the red test lead into the “positive” jack, and the black into

the “COM” jack.

Connect test leads with both ends of the measured objects.

Caution:

Do not input voltage above 600V to prevent electric shock or damage.

The input impedance of each range scale is 10M this load effect Ω,

in high resistance measurement may cause error. If the input

impedance is lower than 10k the error can be ignored ( 0.1%). Ω, ≤

Be cautious to avoid electric shock when measuring high voltage.

Please check the functions by applying a known voltage before use.

9.3 Continuity Test/Resistance/Diode/Capacitance

Measurement (Picture 4)

Select the corresponding function scale.

Insert the red test lead into the “ ” jack, and the black

into the “COM” jack.

Connect test leads with both ends of the measured object.

Caution:

Do not input voltage above DC 60V or AC 30V to avoid personal

injury.

Please disconnect all the other parts of the circuit to avoid inaccuracy.

Before the resistance online measurement, please do disconnect

all the power and fully discharge all capacitors to avoid injury or

device damage.

If the resistance is over 0.5Ω when the test leads are short-circuited,

please check the test leads for looseness or other abnormalities.

If the measured resistor is open or the resistance exceeds the

maximum range, the LCD will display “OL”.

Measured value = displayed value – probe short circuit value

It is recommended to use “REL” measurement mode for capacitance

less than 100nF.

9.4 Temperature Measurement (UT202R only, Picture 5)

Select the temperature measurement function scale.

Insert K-type thermocouple to the meter, fix the temperature probe

on the measured object, and read after the value is stable.

5. Symbols

Current Measurement

Picture 2

Capacitance

Continuity

Diode

Resistance

Picture 4

(UT204R only)

Picture 5

Picture 3

Red Black

Red

Black

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, 61010-2-032/033

and electromagnetic radiation protection EN61326-1 safety standards,

and conforms to double insulation, CAT II 600V, CAT III 300V and

pollution grade II. In case the meter is not used properly as instructions,

the protection provided may be weakened or lost.

Before each use verify tester operation by measuring a known voltage.

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.

Do not use the meter if the rear cover or the battery cover is not

covered up, or it will pose a shock hazard!

Keep fingers behind the finger guards and away from the metal

probe contacts when making measurements.

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!

Do not apply voltage over 600V between any meter terminal and

earth ground to prevent electric shock or damage to the meter.

Use caution when working with voltages above AC 30Vr.m.s,

42Vpeak or DC 60V. Such voltages pose a shock hazard.

Never input voltage or current which exceeds the specified limit.

Maximum range should be selected if measured value is unknown.

Before measuring resistance, diode and continuity, please disconnect

all power and fully discharge all capacitors to avoid inaccuracy.

When the “ ” symbol appears on the LCD, please replace the

batteries in time to ensure measurement accuracy. Batteries should

be removed If the meter is long-term idle.

Do not change the internal circuit of the meter to avoid damage to the

meter and user!

Do not expose the meter in high temperature/humidity, flammable,

explosive or intense magnetic environments.

Clean the meter casing with a soft cloth and mild detergent. Do not use

abrasives or solvents!

Description

Caution, possibility of electric shock

Alternating current

Direct current

Equipment protected throughout by DOUBLE

INSULATION or REINFORCED INSULATION

Earth (ground) TERMINAL

Warning or Caution

Symbol

It is applicable to test and measuring circuits connected

directly to utilization points socket outlets and similar (

points of the low voltage MAINS installation) - .

It is applicable to test and measuring circuits connected

to the distribution part of the building s low voltage ' -

MAINS installation .

CAT III

CAT II

Picture 1

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.

Produkt Specifikationer

Mærke:	Uni-T
Kategori:	Måleudstyr
Model:	UT204R

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