Unit UT90C User manual

Table of Contents
Title Page
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
Rotary Switch
Functional Buttons
Display Symbols
Measurement Operation
A. AC & DC Voltage Measurement
B. Measuring Resistance, Diodes,
Continuity & Capacitance
C. Frequency Measurement
D. AC & DC Current Measurement
E. Power Charging
Operation of Hold Mode
The Use of Relative Value Mode
The RESET Button
The SELECT Button
Sleep Mode
General Specifications
Accuracy Specifications
A. AC Voltage
B. DC Voltage
C. Resistance
D. Diode & Continuity
E. Capacitance Test
F. Frequency Test
G. AC Current
H. DC Current
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Model UT90C: OPERATING MANUAL
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Table of Contents
Title Page
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
Rotary Switch
Functional Buttons
Display Symbols
Measurement Operation
A. AC & DC Voltage Measurement
B. Measuring Resistance, Diodes,
Continuity & Capacitance
C. Frequency Measurement
D. AC & DC Current Measurement
E. Power Charging
Operation of Hold Mode
The Use of Relative Value Mode
The RESET Button
The SELECT Button
Sleep Mode
General Specifications
Accuracy Specifications
A. AC Voltage
B. DC Voltage
C. Resistance
D. Diode & Continuity
E. Capacitance Test
F. Frequency Test
G. AC Current
H. DC Current
Title Page
Maintenance
A. General Service
B. Replacing the Fuses
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Model UT90C: OPERATING MANUAL

Table of Contents
Title Page
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
Rotary Switch
Functional Buttons
Display Symbols
Measurement Operation
A. AC & DC Voltage Measurement
B. Measuring Resistance, Diodes,
Continuity & Capacitance
C. Frequency Measurement
D. AC & DC Current Measurement
E. Power Charging
Operation of Hold Mode
The Use of Relative Value Mode
The RESET Button
The SELECT Button
Sleep Mode
General Specifications
Accuracy Specifications
A. AC Voltage
B. DC Voltage
C. Resistance
D. Diode & Continuity
E. Capacitance Test
F. Frequency Test
G. AC Current
H. DC Current
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.
The Model UT90C (hereafter referred to as “the Meter”)
is a 4000 counts, 3 3/4 digits environment protected auto
ranging electrical tester with stabilized functions, safe
design, and reliable performance.
In addition to the conventional measuring function, such
as DC/AC voltage, DC/AC current, resistance, diode,
data hold and continuity, it is equipped with capacitance
test, frequency test, relative mode and advanced design
of charging power through 220V AC or 12-36VAC/DC
or solar energy. With such design, the Meter can be used
without battery, therefore it will not cause chemical
pollution. This is also a highly applied digital electrical
tester of good performance with full icons display LCD,
overload protection and streamline outlook.
Model UT90C: OPERATING MANUAL
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Unpacking Inspection
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.
Item
1
2
3
Description
English Operating Manual
Test Lead
Holster
Qty
1 piece
1 pair
1 piece
Table of Contents
Title Page
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
Rotary Switch
Functional Buttons
Display Symbols
Measurement Operation
A. AC & DC Voltage Measurement
B. Measuring Resistance, Diodes,
Continuity & Capacitance
C. Frequency Measurement
D. AC & DC Current Measurement
E. Power Charging
Operation of Hold Mode
The Use of Relative Value Mode
The RESET Button
The SELECT Button
Sleep Mode
General Specifications
Accuracy Specifications
A. AC Voltage
B. DC Voltage
C. Resistance
D. Diode & Continuity
E. Capacitance Test
F. Frequency Test
G. AC Current
H. DC Current
Model UT90C: OPERATING MANUAL
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Safety Information
Safety Information
This Meter complies with standards IEC61010: in pollution
degree 2, overvoltage category (CAT. II 1000V, CAT. III
600V) and double insulation.
Use the Meter only as specified in this operating manual,
otherwise the protection provided by the Meter may be
impaired.
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 8.
Model UT90C: OPERATING MANUAL
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Rules For Safe Operation (1)
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:
lBefore 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.
lInspect 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.
lWhen using the test leads, keep your fingers
lDo not apply more than the rated voltage, as
marked on the Meter, between the terminals or
between any terminal and grounding.
lWhen the Meter working at an effective voltage
over 60V in DC or 30V in AC, special care should
be taken from there is danger of electric shock.
lUse the proper terminals, function, and range
for your measurements.
lThe 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.
lDisconnect circuit power and discharge all high
-voltage capacitors before testing current,
resistance, diodes, continuity or capacitance.
lStart charging as soon as the power indicator
appears. With a low battery, the Meter might
Model UT90C: OPERATING MANUAL
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Rules For Safe Operation (2)
produce false readings that can lead to electric
shock and personal injury.
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 Turn off the Meter when it is not in use
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 The Meter is suitable for indoor use.
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International Electrical Symbols
AC (Alternating Current).
DC (Direct Current).
AC or DC.
Grounding.
Double Insulated.
Deficiency of Built-In Battery.
Continuity Test.
Diode.
Fuse.
Warning. Refer to the Operating Manual.
Conforms to Standards of European Union.
Capacitance Test
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The Meter Structure (see figure 1)
9
( figure 1)
1 LCD Display.
2 Solar Panel.
3SELECT Button.
4 Rotary Switch.
5 HOLD Button.
6 Input Terminals
7 Relative Mode &RESET Button
Model UT90C: OPERATING MANUAL

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Rotary Switch
Below table indicated for information about the rotary
switch positions.
Rotary
Switch
Position Function
AC/DC voltage measurement.
: Diode test.
: Resistance measurement.
Ω
AC or DC Current Measurement
Power is turned off.OFF
: Continuity test.
: Capacitance test.
Ω
Hz Frequency Test.
l 230V MAX:
Charge at 220VAC.
l 12-36V : Charge at
12-36V .
CHARGE
Model UT90C: OPERATING MANUAL