Unit UT202A Manual de usuario
UT202A Operating Manual
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Title Page
Contents
Overview
Unpacking Inspection
Safety Information
Rules for Safe Operation
International Electrical Symbols
The Meter Structure
Functional Buttons and auto power off
Display Symbols
Measurement Operation
A. DC Voltage Measurement
B. AC Voltage Measurement
C. Measuring Resistance
D. Testing Diodes
E. Testing for Continuity
F. AC Current Measurement
Specications
A. General Specications
B. Environmental Restriction
Accuracy Specications
A. AC Voltage
B. DC Voltage
C. Resistance
D. Continuity Test
E. Diode Test
F. AC Current
Maintenance
A. General Service
B. Replacing the Battery
2
UT202A Operating Manual
Overview
This Operating Manual covers information on
safety and cautions. Please read the relevant
information carefully and observe all the
Warnings and Notes strictly.
Warning
To avoid electric shock or personal injury, read
the “Safety Information” and “Rules for Safe
Operation” carefully before using the Meter.
Digital Multimeter Model UT202A (hereafter
referred to as “the Meter”) is 3 1/2 digits with
steady operations, fashionable structure and
highly reliable measuring instrument. The Meter
uses large scale of integrated circuit with double
integrated A/D converter as its core and has full
range overload protection.
The Meter can measure AC/DC Voltage, AC
Current, Resistance, Diodes, and Continuity.
Unpacking Inspection
Open the package case and take out the Meter.
Check the following items carefully to see any
missing or damaged part:
Item Description Qty
1 English Operating Manual 1 piece
2 Test Lead 1 pair
In the event you find any missing or damage,
please contact your dealer immediately.
43
Safety Information
This Meter complies with the standards
IEC61010: in pollution degree 2, overvoltage
category (CATII 600V, CAT III 300V) and double
insulation.
CATII: Local level, appliance, PORTABLE
EQUIPMENT etc., with smaller transient
overvoltages than CATIII.
CAT III: Distribution level, xed installation, with
smaller transient overvoltages than CAT IV
Use the Meter only as specied in this operating
manual, otherwise the protection provided by
the Meter may be impaired.
In this manual, a Warning identies conditions
and actions that pose hazards to the user, or
may damage the Meter or the equipment under
test.
A Note identifies the information that user
should pay attention to.
International electrical symbols used on
the Meter and in this Operating Manual are
explained on page 6.
UT202A Operating Manual
Rules for Safe Operation
Warning
To avoid possible electric shock or personal
injury, and to avoid possible damage to the
Meter or to the equipment under test, adhere to
the following rules:
● Before using the Meter inspect the case.
Do not use the Meter if it is damaged or the
case (or part of the case) is removed. Look for
cracks or missing plastic. Pay attention to the
insulation around the connectors.
● Inspect the test leads for damaged
insulation or exposed metal. Check the test
leads for continuity. Replace damaged test
leads with identical model number or electrical
specications before using the Meter.
● Do not apply more than the rated voltage,
as marked on the Meter, between the terminals
or between any terminal and grounding. If the
value to be measured is unknown, use the
maximum measurement position and reduce the
range step by step until a satisfactory reading is
obtained.
● When measurement has been completed,
disconnect the connection between the test
leads and the circuit under test, remove the
testing leads away from the input terminals of
the Meter and turn the Meter power off.
● The rotary switch should be placed in
the right position and no any changeover of
range shall be made during measurement is
conducted to prevent damage of the Meter.
● Do not carry out the measurement when
the Meter’s back case and battery compartment
43
UT202A Operating Manual
65
are not closed to avoid electric shock.
● Do not input higher than 600V between the
Meter’s terminals and the grounding to avoid
electric shock and damages to the Meter.
● When the Meter working at an effective
voltage over 60V in DC or 30V rms in AC,
special care should be taken for there is danger
of electric shock.
● Use the proper terminals, function, and
range for your measurements.
● Do not use or store the Meter in an
environment of high temperature, humidity,
explosive, inflammable and strong magnetic
field. The performance of the Meter may
deteriorate after dampened.
● When using the test leads, keep your
ngers behind the nger guards.
● Disconnect circuit power and discharge
all high-voltage capacitors before testing
resistance, continuity and diode.
● Replace the battery as soon as the battery
indicator appears. With a low battery, the
Meter might produce false readings that can
lead to electric shock and personal injury.
● When servicing the Meter, use only the
same model number or identical electrical
specications replacement parts.
● The internal circuit of the Meter shall not be
altered at will to avoid damage of the Meter and
any accident.
● Soft cloth and mild detergent should be
used to clean the surface of the Meter when
servicing. No abrasive and solvent should be
used to prevent the surface of the Meter from
corrosion, damage and accident.
● The Meter is suitable for indoor use.
● Turn the Meter off when it is not in use and
UT202A Operating Manual
take out the battery when not using for a long
time.
● Constantly check the battery as it may leak
when it has been using for some time, replace
the battery as soon as leaking appears. A
leaking battery will damage the Meter.
International Electrical Symbols
AC (Alternating Current)
DC (Direct Current)
AC or DC
Grounding
Double Insulated
Warning. Refer to the Operating Manual
Deciency of Built-In Battery
Continuity Test
Diode
Conforms to Standards of European Union
65
UT202A Operating Manual
87
UT202A Operating Manual
The Meter Structure (see gure 1)
1. Input Terminals
2. LCD Display
3. Functional Buttons
4. Rotary Switch
5. Trigger: press the lever to open the
transformer jaws. When the pressure on the
lever is released, the jaws will close.
6. Hand Guards: to protect user’s hand from
touching the dangerous area.
7. Transformer Jaws: designed to pick up the
AC current owing through the conductor.
It could transfer current to voltage. The
tested conductor must vertically go through
the jaw center.
(gure 1)
Functional Buttons and auto power
off
1. HOLD
Press HOLD to enter and exit hold mode. Press
and hold HOLD button while turning on the
Meter, auto power off be canceled.
2. MAX
Press MAX to start recording and updating of
maximum values.
3. SELECT
Under Ωranging, resistance
measurement mode is default, press SELECT
to select continuity measurement mode or diode
measurement mode.
4. Auto power off
To preserve battery life, the Meter automatically
goes into a “sleep” mode if you do not press any
button for around 10 minutes. The Meter can be
activated by pressing any effective button (refer
to The Effectiveness of Functional Buttons),
then returns to the display for the function
selected previously.
5. Buzzer
The buzzer phonate go with every time button
be effectual pressed. When the meter will auto
power off in 1 minute the buzzer beeps five
times. Before power off there will be a long time
buzzer beeps.
6. The Effectiveness of Functional Buttons
Not every functional buttons can be used on
87
UT202A Operating Manual
every rotary switch positions. Below table
describe which functional buttons can be used
on which rotary switch positions
Rotary Functional Buttons
Switch SELECT MAX HOLD
Positions
Ω • N/A •
N/A • •
N/A • •
A 20A N/A • •
A 200A N/A • •
A 600A N/A • •
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UT202A Operating Manual
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UT202A Operating Manual
Display Symbols (see gure 2)
(gure 2)
Number Meaning
1 Indicator for AC voltage or current
2 Indicator for DC voltage
3 The battery is low.
Warning: To avoid false readings, which
could lead to possible electric shock or
personal injury, replace the battery as soon as
the battery indicator appears.
4 The Meter is in the auto range mode in
which the Meter automatically selects
the range with the best resolution.
5 Test of diode
6 The continuity buzzer is on
7 Maximum reading displayed
8 Data hold is active
9 Amperes (amps). The unit of current.
10 Ω: Ohm. The unit of resistance.
kΩ:Kilohm. 1000 ohms
MΩ:Megohm. 1,000,000 ohms
11 V: Volts. The unit of voltage.
mV: Millivolt. 0.001 volts
12 Indicates negative reading
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