Unit UT30A User manual

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DOKUMENT TEN JEST PRZEZNACZONY DLA KLIENTÓW FIRMY

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Title
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter structure
Make Measurements
Measurement Operation
A. DC Voltage Measurement
B. AC Voltage Measurement
C. DC Current Measurement
D. AC Current Measurement
E. Resistance Measurement
F. Diode measurement
G. Transistor hFE Measurement
Table of Contents (1)
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Model UT30A: OPERATING MANUAL

Table of Contents (2)
PageTitle
H. Continuity test
General Specifications
Accuracy Specifications
A. DC Voltage
B. AC Voltage
C. DC Current
D. AC Current
E. Resistance
F. Diode, Transistor, Continuity
Maintenance
A. “Hold”, “Power” Button 30
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28
27
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B. Fuse and Battery replacement
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Model UT30A: OPERATING MANUAL

UT30A Multimeter is 3 3/4 digits with steady operations, fashionable structure and
highly reliable hand-held measuring instrument. The meter can measure DC/AC
Voltage, DC/AC Current, Resistance, Diode, Transistor hFE, Continuity,and etc.It
is an ideal carry-on tool for users.
Overview
This Operation 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.
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Model UT30A: OPERATING MANUAL

Open the packing 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
Item
1
2
3
Description
Operating Manual
Test Lead
Holster (Note: Purchase another protector)
Qty
1 piece
1 pair
1 piece
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Model UT30A: OPERATING MANUAL

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Model UT30A: OPERATING MANUAL
Safety Information
The UT30A complies with IEC61010-1: Pollution Degree 2;(CATI600V &
CATII 300V voitage standard) with double insulation.Use the Meter only
as specified in this msnual.otherwise ,the protection provided by the Meter
may be impaired.
CAT I-F or local level. telecommunication.electronic with small transient
ovltage.
CAT II-For local level .appliances, main wall outlets,portable equipment.

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Model UT30A: OPERATING MANUAL
l Set the Meter to suitable function and range before each measurement.
l Tested values over the maximum range of each measurement can cause damages
of the Meter or electric shock to users.
l Do not turn the rotary switch during measurement to avoid damages of the Meter.
l When measuring voltage higher than DC 60V or AC 30Vrms, pay extra attention
l Inspect the insulation of the test leads and no damages to the test leads before
using the Meter.
l As soon as the battery indicator’s“ ” appears, replace the battery to ensure
accurate readings.
Rules For Safe Operation (1)
Warning
Read the manual carefully before use. Use the Meter only as specified in this
manual, otherwise, the protection provided by the Meter may be impaired.
l Do not operate the Meter unless the bottom case has been closed as terminal
can carry voltage.

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Model UT30A: OPERATING MANUAL
l Do not operate or store the Meter under high temperature or humid condition,
otherwise, the Meter will get worse.
l Do not change internal circuit to avoid damages to the meter and danger to the
user.
l Periodically wipe the case with cloth and mild detergent. Do not use abrasives
and solvents.
l Take out of the batteries from the case, if the meter will be not used for long time.
to avoid electric shock.
lUse only 0.5A/250V φ5X20(mm) fast acting fuse to replace the bad one.
Rules For Safe Operation (2)

International Electrical Symbols
AC Current
DC Current
Double Insulated.
Diode.
Fuse.
Safety Rules
Conforms to Standards of European Union.
Grounding
AC or DC
Continuity Test
Deficiency of Built-In Battery
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Model UT30A: OPERATING MANUAL

Model UT30A: OPERATING MANUAL
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1. Liquid Crystal Display
2. Data hold or POWER function Button
3. Rotary Switch
4. Transistor Test Jack
5. Common Input Jack
6. 10A Input Jack
7. VΩ mA Input Jack for General Measurement
The Meter structure
( figure 1)
The Meter structure (figure 1)

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Model UT30A: OPERATING MANUAL
Make Measurements
First, set rotary switch to proper position, sfter several seconds of self-check, the
meter will enter measuring state. when appear on LCD, replace a new battery
to ensure accurate display. Second, symbol beside the input jack, warns you
when testing current and voltage,input values must not exceed the limit.

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Model UT30A: OPERATING MANUAL
Measurement Operation (1)
A. DC Voltage Measurement (figure 2)
Warning
Never measure voltage value exceeding 500V, although it is possible to get the
reading, which will cause damages to the internal circuit and hurt users;
( figure 2 )
black red

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Model UT30A: OPERATING MANUAL
1) Measuring value input from “VΩmA” (red test lead) and “COM” (black test lead.)
2) The Meter has auto-range function with initial range 400mV, at which, the meter
may display irregular digits for open Circuit, and come to ZERO for short circuit,
which are both normal.
3) For ranges except 400mV, input impedance 10MΩ , this can cause measuring
tolerance at high impedance circuit ,If circuit impedance is equal or less than
10kΩ, you can ignore the tolerance (0.1% or lower).
4) The meter would clatter with flash of LCD reading if input exceeding 1000V,
which warns you pay extra attention.
Measurement Operation (2)

Measurement Operation (3)
B. AC Voltage Measurement: (figure 3)
Warning
Same as DC voltage measurement, however,
The meter has auto-range
function with initial range of 4V,
and input exceeding 750V would
make it clatter with LCD glittering,
which warns you should pay extra
attention.
(figure 3)
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Model UT30A: OPERATING MANUAL
black red

C. DC Current Measurement (figure 4)
Warning
This range is manual range. Do not measure, when value between open voltage
and earth exceeding safety voltage 60V, to avoid damages to the tested Meter
or instrument, and hurt the user.
Measurement Operation (4)
(figure 4)
black red
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Model UT30A: OPERATING MANUAL

1) Before measurement, cut off the power of object to be measured and inspect
whether input terminal or rotary switch is set to the proper range. Ensure it is
proper, then you can measure the object with power on.
2) If the magnitude of current is unknown, you should set rotary switch to the
higher range, then adjust to a lower range until a satisfactory reading is obtained.
3) Measuring value inputs from “VΩ mA” or “10A” jack (red test leads) and “COM”
jack (black test leads).
4) For “VΩ mA” input jack, the Meter has a 0.5A/250V (φ5x20mm) fuse,
overloaded,if overloaded, the fuse will be melt up, so replace with a new one
with the same specification.
5) For 10A input jack, it is unfused; For your safety, every measuring time should
equal to or less than 10 seconds, times interval should be equal to or over 15
minutes.
6) The meter would clatter with glitter of LCD reading if input exceeding 1000V,
or overloaded which warns you pay extra attention.
7) The meter would clatter with glitter of LCD reading if overloaded, which warns
you pay extra attention.
Measurement Operation (5)
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Model UT30A: OPERATING MANUAL

(figure 5)
Measurement Operation (6)
D. AC Current Measurement (figure 5)
Warning
Same as DC current measurement.
black red
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Model UT30A: OPERATING MANUAL

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Model UT30A: OPERATING MANUAL
Measurement Operation (7)
E. Resistance Measurement (figure 6)
Warning
To avoid damages to the Meter, when measuring resistance, cut off the power
of the object and no charge in capacitor.
1) Measuring value inputs from “VΩ ”
jack (red test leads) and “COM”
jack (black test leads).
2) Wires takes 0.1Ω - 0.3Ωtolerance
at function of 400Ω, when
measuring resistance. To get
an accurate reading, you can
subtract the short circuit values
of the 2 test leads.
(figure 6)
mA
black red

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Model UT30A: OPERATING MANUAL
Measurement Operation (8)
( figure 7)
3) It will take several seconds for the display to become stabilize when resistance
value is over 1MΩ, it is normal, because it is auto-range.
F. Diode measurement ( figure 7)
Warning
Cut off the power supply of the object to
avoid damages to the Meter When
measuring diode, no charge in capacitor.
1) Measuring value inputs from “VΩmA”
jack (red test leads) and “COM” jack
(black test leads).
2) When measuring voltage drop of PN,
for a good silicon semiconductor
structure, normal positive reading
should stay between 0.5V~0.8V.
Negative display being “OL” means
black red

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Model UT30A: OPERATING MANUAL
Measurement Operation (9)
open circuit; at this time, the red test lead is positive pole, and the black
one is negative pole. In addition, “V” acts as unit of this range.
G. Transistor hFE Measurement ( figure 8)
1) Check that the transistor is PNP or
NPN type at first.
2) Connect the transistor to be measured
to the corresponding jacks.
3) LCD displays hFE reference value.
4) Measuring condition: Ibo10µA,
Vce 3V
( figure 8)