Unit UT33A Manuale utente
1
Model UT33A: OPERATING MANUAL
Page
3
4
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7
10
11
12
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26
Title
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter structure
Functional Buttons
LCD Display
Measurement Operation
A. DC Voltage Measurement
B. AC Voltage Measurement
C. DC Current Measurement
D. AC Current Measurement
E. Resistance Measurement
F. Diode and Continuity Test
Table of Contents (1)
G. Transistor hFE Measurement
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Model UT33A: OPERATING MANUAL
Table of Contents (2)
Title
Sleep Mode
General Specifications
Accuracy Specifications
A. DC Voltage
B. AC Voltage
C. DC Current
D. AC Current
E. Resistance
F. Diodes and Continuity
Measurement
G. Transistor hFE Test
Maintenance
A. General Service
B. Replacing the Battery
C. Replacing the Fuses
Page
27
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33
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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 Safety Operation” carefully before using the Meter.
The Model UT33A Multimeter (hereafter referred as “the Meter”) is a 3 3/4 digits
with steady operations, fashionable design and highly reliable hand-held measuring
instrument. The Meter can measureAC/DC voltage, AC/DC Current, Resistance,
Transistor hFE, Diode and Continuity. It is an ideal tool for maintenance.
Model UT33A: OPERATING MANUAL
4
Open the package case and take out the Meter. Check the following items carefully
to see any missing or damaged part:
In the event you find any missing or damage, please contact your dealer immediately.
Unpacking Inspection
Model UT33A: OPERATING MANUAL
Item
1
2
3
Description Qty
1 piece
1 pair
1 piece
English Operating Manual
Test Lead
Holster
5
Model UT33A: OPERATING MANUAL
Safety Information(1)
Safety Information
This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage
category (CAT I 600V, CAT II 300V) and double insulation.
CAT. I: Signal level, special equipment or parts of equipment, telecommunication,
electronic, etc., with smaller transient overvoltages than overvoltages CAT. II.
CAT. II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient
overvoltages than CAT. III
Use the Meter only as specified in this operating manual, otherwise the protection
provided by the Meter may be impaired.
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Model UT33A: OPERATING MANUAL
Safety Information(2)
In this manual, a Warning identifies 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 on.
International electrical symbols used on the Meter and in this Operating Manual are
explained on page 10.
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Model UT33A: OPERATING MANUAL
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:
l 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.
l 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 specifications before using the Meter.
l Do not apply more than the rated voltage, as marked on the Meter, between
the terminals or between any terminal and grounding.
l 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.
Rules For Safe Operation (1)
8
Model UT33A: OPERATING MANUAL
l When the Meter is working at an effective voltage over 60V in DC or 42V
rms in AC, special care should be taken for there is danger of electric shock.
l Use the proper terminals, function, and range for your measurements.
l 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.
l When using the test leads, keep your fingers behind the finger guards.
l Disconnect circuit power and discharge all high-voltage capacitors before
testing resistance, continuity, diodes and current.
l Before measuring current, check the Meter’s fuses and turn off power to
the circuit before connecting the Meter to the circuit.
l 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.
Rules For Safe Operation (2)
9
Model UT33A: OPERATING MANUAL
l Remove test leads from the Meter and turn the Meter power off before
opening the Meter case.
l When servicing the Meter, use only the same model number or identical
electrical specifications replacement parts.
l The internal circuit of the Meter shall not be altered at will to avoid damage
of the Meter and any accident.
l 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.
l The Meter is suitable for indoor use.
l Turn the Meter off when it is not in use and take out the battery when not
using for a long time.
l 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.
Rules For Safe Operation (3)
10
Model UT33A: OPERATING MANUAL
International Electrical Symbols
Continuity Test
AC Current
DC Current
Double Insulated.
Deficiency of Built-In Battery
Diode.
Fuse.
Warning. Refer to the Operating Manual
Conforms to Standards of European Union.
Grounding
AC or DC
Indice
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