Unit UT58E 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. DC and AC Voltage Measurement
B. DC and AC Current Measurement
C. Measuring Resistance
D. Measuring Diodes and Continuity
E. Frequency Measurement
F. Temperature Measurement
G. Capacitance Measurement
H. Measuring Transistor
Sleep Mode
Operation of Hold Mode
General Specifications
Accuracy Specifications
A. DC Voltage
B. AC Voltage
C. DC Current
D. AC Current
E. Resistance Test
F. Diodes and Continuity Test
G. Frequency
H. Temperature
I. Capacitance
J. Transistor test
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Model UT58E: OPERATING MANUAL

Maintenance
A. General Services
B. Replacing the Fuses
C. Replacing the Battery
Title Page
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Digital Multimeters Model UT58E (hereafter referred to
as “the Meter”) is 4 1/2 digits with ex-large LCD, steady
operations, fashionable structure and highly reliable
hand-held 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 has 28 different measuring
functions. It has not only can measure AC/DC Voltage,
AC/DC Current, Resistance, Temperature, Capacitance,
Frequency, Transistor, Diode and Continuity, but also
have Data Hold, Full Icon Display, Overload Protection
and Sleep Mode features.
Warning
To avoid electric shock or personal injury, read the
“Safety Information” and “Rules for Safety Operation”
carefully before using the Meter.
Overview
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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.
1 English Operating Manual 1 piece
2 Test Lead 1 pair
3 Multi-Purpose Socket 1 piece
4 Test Clip
5 Point Contact Temperature Probe
6 Holster 1 piece
7 9V Battery (NEDA 1604, 6F22 or 009P)1 piece
1 piece
1 piece
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Model UT58E: OPERATING MANUAL
Item Description Qty

Safety Information
This Meter complies with the standards IEC61010: in
pollution degree 2, overvoltage category (CAT. II 1000V,
CAT. III 600V) and double insulation.
CAT. II: Local level, appliance, PORTABLE EQUIPMENT
etc., with smaller transient voltage overvoltages than
CAT. III
CAT. III: Distribution level, fixed installation, with smaller
transient overvoltages than CAT. IV
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 to.
International electrical symbols used on the Meter and
in this Operating Manual are explained on page8
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Rules For Safe Operation (1)
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.
l 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.
l Use the proper terminals, function, and range for
your measurements.
l If the value to be measured is unknown, use the
maximum measurement position and reduce the
range stop by step until a satisfactory reading is
obtained.
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.
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Model UT58E: OPERATING MANUAL

Rules For Safe Operation (2)
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, capacitance or 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.
l Remove test leads and multi-purpose socket 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 power 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.
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International Electrical Symbols
AC (Alternating Current).
DC (Direct Current).
Grounding.
Double Insulated.
Deficiency of Built-In Battery.
Warning. Refer to the Operating Manual.
Conforms to Standards of European Union.
Diode.
Fuse.
Continuity Test.
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Model UT58E: OPERATING MANUAL
( figure 1)
The Meter Structure (see figure 1)
1 LCD Display
2HOLD Button.
3 Rotary Switch
4COM Input Terminal
5POWER
6 Other Input Terminal.
7mA Input Terminal
820A Input Terminal

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Rotary Switch
Below table indicated for information about the rotary switch
positions.
DC voltage measurement.
AC voltage measurement.
Transistor Test
AC Current Measurement
DC Current Measurement
Fcx Capacitance Test
oCTemperature Measurement
Diode test
Continuity test
Resistance measurement.
Hz Frequency Measurement

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Display Symbols(1) (see figure 2)
( figure 2)
No. Symbol Meaning
1
The battery is low.
Warning: To avoid false
readings, replace the battery as
soon as the battery indicator
appears.
4Indicates negative reading.
5Test of diode.
6The continuity buzzer is on.
7Date hold is active.
8
Indicator for AC voltage or current.
The displayed value is the mean
value.
3AC
Connect
Terminal
Indicator of connecting test leads
into different input terminals.
2Warning Symbol.
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Model UT58E: OPERATING MANUAL

,mA, A
A: Amperes (amps). The unit of
current.
mA: Milliamp. 1 x 10-3 or 0.001
amperes.
V: Volts. The unit of voltage.
mV: Millivolt. 1 x 10-3 or 0.001 volts.
No. Symbol Meaning
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Display Symbols(2) (see figure 2)
hFE The Unit of Transistor Test
10 A
Hertz. The unit of frequency in
cycles/second.
Kilohertz. 1 x 103or 1,000 hertz.
kHz
oC: Centigrade temperature
oF: Fahrenheit temperature
oC,oF
F: Farad. The unit of capacitance.
F: Microfarad. 1 x 10-6 or 0.000001
farads.
nF: Nanofarad. 1 x 10-9 or 0.000000001
farads.
nF, F
A: Microamp. 1x 10-6 or 0.000001
amperes.
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Model UT58E: OPERATING MANUAL
Measurement Operation(1)
To avoid harms to you or damages to the Meter from
electric shock, never attempt to measure voltages
higher than 1000 or 1000V rms although readings
may be obtained.
( figure 3)
Black Red

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Model UT58E: OPERATING MANUAL
Measurement Operation(2)
B. DC and AC Current Measurement (see figure 4)
( figure 4)
Black Red
“ ”

Measurement Operation(3)
Warning
Never attempt an in-circuit current measurement
where the open circuit voltage between terminals
and ground is greater than 60V DC or 30V rms in AC.
If the fuse burns out during measurement, the Meter
may be damaged or the operator himself may be
hurt. Use proper terminals, function, and range for
the measurement. When the testing leads are
connected to the current terminals, do not parallel
them across any circuit.
The DC Current Measurement has 3 measurement
positions on the rotary switch: 2mA, 200mA and 20A
The AC Current Measurement has 3 measurement
positions on the rotary switch: 20mA, 200mA and 20A
1. Turn off power to the circuit. Discharge all high-
voltage capacitors.
2. Insert the red test lead into the 20A or mA input
terminal and the black test lead into the COM terminal.
When you measure current below 200mA, please
insert the red test lead into the mA input terminal.
When you measure 200mA or above, insert the red
test lead into the 20A input terminal.
3. Set the rotary switch to an appropriate measurement
position in A or A range.
4. Break the current path to be tested. Connect the red
test lead in serial to the more positive side of the
break and the black test lead to the more negative
side of the break.
5. Turn on power to the circuit.
The measured value shows on the display.
To measure current, do the following:
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Model UT58E: OPERATING MANUAL
Measurement Operation(4)
( figure 5)
Black Red
Warning
To avoid damages to the Meter or to the devices under
test, disconnect circuit power and discharge all the
high-voltage capacitors before measuring resistance.
Note
l If the value of current to be measured is unknown,
use the maximum measurement position, and reduce
the range step by step until a satisfactory reading is
obtained.
l For safety sake, the measuring time for high current
should be less than 10 seconds and the interval time
between 2 measurements should be greater than 15
minutes
l When current measurement has been completed,
disconnect the connection between the testing leads
and the circuit under test, and remove the testing
leads away from the input terminal of the Meter.
C. Measuring Resistance (see figure 5)
The resistance ranges are: 200 ,2k ,20k ,2M and
200M

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Measurement Operation(5)
D. Measuring Diodes and Continuity (see figure 6)
Black Red
( figure 6)
To measure resistance, connect the Meter as follows:
“1”

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Measurement Operation(6)
Warning
To avoid damage to the Meter or to the equipment
under test, disconnect circuit power and discharge
all high-voltage capacitors before measuring diodes.
To avoid harms to you, never attempt to input voltages
higher than 60V DC or 30V rms in AC
Measuring Diodes
Use the diode test to check diodes, transistors, and other
semiconductor devices. The diode test sends a current
through the semiconductor junction, and then measures
the voltage drop across the junction. A good silicon junction
drops between 0.5V and 0.8V
Note
l In a circuit, a good diode should still produce a forward
voltage drop reading of 0.5V to 0.8V; however; the
reverse voltage drop reading can vary depending on
the resistance of other pathways between the probe
tips.
l Connect the test leads to the proper terminals as said
above to avoid error display. The LCD will display “1”
indicating open-circuit for wrong connection. The unit
of diode is Volt (V), displaying the positive-connection
voltage-drop value.
,
,s

Measurement Operation(7)
l The open-circuit voltage is around 3V.
l When diode testing has been completed, disconnect
the connection between the testing leads and the
circuit under test, and remove the testing leads away
from the input terminal of the Meter.
Testing for Continuity
To test for continuity, connect the Meter as below:
1. Insert the red test lead intoVterminal and the black
test lead into the COM terminal.
2. Set the rotary switch to .
3. Connect the test leads across with the object being
measured.
4. The buzzer does not sound if the resistance of a circuit
under test is 70
The tested circuit resistance value simultaneously
shows on the display and the unit is .
Note
l When continuity testing has been completed,
disconnect the connection between the testing leads
and the circuit under test, and remove the testing
leads away from the input terminal of the Meter.
E. Frequency Measurement (see figure 7)
( figure 7)
Black Red
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Model UT58E: OPERATING MANUAL