UNI-T UT58E Operating Manual

Warning

To avoid electric shock or personal injury, read the

"Safety Information carefully before using the

Meter.

Overview

Unpacking Inspection

Open the package case and take out the Meter. Check
the following items carefully for any missing or
damaged part:

In the event you find any missing or damaged part,
please contact your dealer immediately.

1 English Operating Manual 1 pc
2 Test Lead 1 pair
3 Multi-Purpose Socket 1 pc
4 Test Clip
5 Point Contact Temperature Probe
6 Holster 1 pc
7

9V Battery (NEDA 1604, 6F22 or 009P)

1 pc

1 pair
1 pc

Item

Description

Qty

Safety Information

This Meter complies with the standard IEC61010:
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
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.

Warning identifies conditions and

Warning

Description

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:

z 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.

z 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.

z Do not apply more than the rated voltage, as
marked on the Meter, between the terminals or
between any terminal and grounding.

z The rotary switch should be placed in the right
position and no any changeover of range shall
be made during measurement to prevent damage
of the Meter.

z When the Meter works 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.

z Use the proper terminals, function, and range for
your measurements.

z 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.

z 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.

zWhen using the test leads, keep your fingers

behind the finger guards.

zDisconnect circuit power and discharge all high

-voltage capacitors before testing resistance,
continuity, diodes, capacitance or current.

zBefore measuring current, check the Meter's

fuses and turn off power to the circuit before

connecting the Meter to the circuit.

z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.

zRemove test l

eads and multi-purpose socket from
the Meter and turn the Meter power off before
opening the Meter case.

zWhen servicing the Meter, ：use the replacement

parts with the same model or identical electrical
specifications.

zTo avoid any damage to the meter or any accident,

do not alter the internal circuit of the Meter randomly.

z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.

zThe Meter is suitable for indoor use.
zTurn the Meter power off when it is not in use

and take out the battery when not using for a long
time.

z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).

Grounding.

Double Insulated.

Low Battery Indication.

Warning. Refer to the Operating Manual.

Conforms to Standards of European Union.

Diode.
Fuse.
Continuity Test.

( Figure 1)

The Meter Structure (See Figure 1)

1 LCD Display
2 HOLD Button.
3 Rotary Switch
4 COM Input Terminal
5 POWER
6 Other Input Terminal.
7 mA Input Terminal
8 20A Input Terminal

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

o

C Temperature Measurement

Diode test
Continuity test

Resistance measurement.

Hz Frequency Measurement

Display Symbols (See Figure 2)

(See Figure 3)

( Figure 2)

4

Indicates negative reading.

5

Test of diode.

6

The continuity buzzer is on.

7

Date hold is active.

8

Connect
Terminal

Indicator of connecting test leads
into different input terminals.

,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.

9

hFE The Unit of Transistor Test

10

A

Hertz. The unit of frequency in
cycles/second.
Kilohertz. 1 x 10

3

or 1,000 hertz.

kHz

o

C: Centigrade temperature

o

F: Fahrenheit temperature

oC,o

F

F: Farad. The unit of capacitance.
F: Microfarad. 1 x 10

-6

or 0.000001
farads.
nF: Nanofarad. 1 x 10-9or 0.000000001
farads.

nF, F

A: Microamp. 1x 10-6or 0.000001
amperes.

Measurement Operation

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

B. Measuring DC and AC Current (See Figure 4)

( Figure 4)

Black Red

""

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 ranges

: 2mA, 200mA and 20A

The AC Current ranges

: 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:

( Figure 5)

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

z 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.

z 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
z 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.

(See Figure 5)

The resistance ranges are: 200 ,2k ,20k ,2M and

200M

Black Red

D. Testing Diodes and Continuity

(See Figure 6)

( Figure 6)

Black Red

To measure resistance, connect the Meter as follows:

"1"

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

zIn a circuit, a good diode should still produce a forward

,

,
s

No. Symbol Description

1

The battery is low.

Warning: To avoid false
readings, replace the battery as soon
as the battery indicator appears.

Indicator for AC voltage or current.
The displayed value is the mean
value.

3

AC

2

Warning Symbol.

Digital Multimeter Model UT58E is a 20000-count hand

-held instrument with remarkable features: ex-large
LCD, steady operations, overload protection for all
ranges and unique structure. It is designed with large

-scale integrated circuits and dual integral A/D converter
as the core, which offers 28 measuring ranges and can
measure AC/DC voltage, AC/DC current, resistance,
capacitance, transistor, diode and continuity. It is also
equipped with data hold, full icon display and sleep mode
functions, etc;

DC&AC

in parallel.

in parallel.

Measuring DC and AC Voltage

Measuring Resistance

P/N:110401104224

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.

zConnect the test leads to the proper terminals as said

above to avoid error display. The LCD will display

indicating open-circuit or wrong connection. The unit
of diode is Volt (V), displaying the positive-connection
voltage-drop value.

"1"

z The open-circuit voltage is around 2.8V.
z 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 intoV terminal 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 sounds if the resistance of a circuit under
test is 70

The tested circuit resistance value shows on the

display and the unit is .

Note

z 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. Measuring Frequency

(See Figure 7)

( Figure 7)

Black Red

Note

z When Hz 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 terminals of the Meter.

F. Measuring Temperature (See Figure 8)

( Figure 8)

Black Red

Warning
To avoid harm to you or damages to the Meter, never
attempt to measure voltages higher than 60V in DC
or 30V rms in AC although readings may be obtained.
During testing, the operating temperature must be
within 18-23

o

C, otherwise the obtained reading may

not be correct especially measuring low temperature.

The temperature measurement range is from -40

o

C~1000oC

.

To measure temperature, connect the Meter as follows:

1. Insert the "+" and "-" temperature probe into
corresponding V and COM terminal.

2. Set the rotary switch to

o

C .

3. Place the temperature probe's tip to the object being
measured.

The measured value shows on the display.

Note

zWhen the temperature probe doesn't insert into the

Meter, LCD displays internal temperature of the Meter.

zzThe supplied temperature probe can measure only up

to 250℃. If high temperature measurement is required,
please purchase the temperature probe of other models
from our company.

When temperature measeuremnet has been completed,

remove the temperature probe away from the input
terminal of the Meter.

G. Measuring Capacitance

(See Figure 9)

( Figure 9)

Warning
To avoid damage to the Meter or to the equipment
under test, disconnect circuit power and discharge
all high-voltage capacitors before measuring
capacitance.Use the DC voltage function to confirm
that the capacitor is discharged.

To avoid harms to you, never attempt to input voltages

To measure capacitance, connect the Meter as follows:

1.According to the size of the tested object's leads,
select multi-purpose socket or test clip to insert into
the mA and V terminal.

2. Set the rotary switch to an appropriate measurement
position in Fcx range.

3. Insert the tested object into the corresponding jack of
the multi-purpose socket or connect the test clip to the
object being measured.
The measured value shows on the display.

Note

zIf the value of capacitance to be measured is unknown,
use the maximum measurement position, and reduce
the range step by step until a satisfactory reading is

obtained.

zWhen the tested capacitor is shorted or the capacitor

value is overloaded, the LCD display

.

zTo minimize the measurement error caused by the
distributed capacitance, the testing lead should be as
short as possible.

zTo increase the accuracy especially when measuring
small capacitance range, subtract the test leads'
open-circuit value from the display reading.

zIt is normal to take a longer time when testing a high

capacitor value.

zFor testing the capacitor with polarity, connect the
red clip or red test lead to anode and black clip or

black test lead to cathode.

zIt takes some time for zeroing when you switching
over the rotary switch, the floating readings showing
on the display during this process do not affect the

final testing accuracy.

zWhen capacitance testing has been completed,

disconnect tested objects from multi-purpose socket or

test clip, and remove multi-purpose socket or test clip

away from the input terminal of the Meter.

"1"

H. Measuring Transistor

(See Figure9)

Warning
To avoid harms to you, please do not attempt to input
voltages higher than 60V DC or 30V rms AC.

To measure transistor, connect the Meter as follows:

1. Insert the multi-purpose socket into the V and mA

terminal.

2. Set the rotary switch to hFE range.

3. Insert the NPN or PNP type transistor to be tested into
the corresponding jack of the multi-purpose socket

The measured nearest transistor value shows on the

display.

Note

z When transistor measeurement has been completed,

remove the transistor to be tested away from the multi­ purpose socket, and remove multi-purpose socket
away from the input terminal of the Meter.

Operation of Hold Mode

Warning

To avoid possibility of electric shock, do not use Hold
mode to determine if circuits are without power. The
Hold mode will not capture unstable or noisy readings.

To use the Hold mode as follows:

z Press HOLD to enter Hold mode.
z Press HOLD again to exit Hold mode.
z In Hold mode, H is displayed.

Sleep Mode

To preserve battery life, the Meter automatically turns off
if you do not turn the rotary switch or press any button
for around 15 minutes. When the Meter is under sleep
mode, it consumes 10 A current.

To activate the Meter, press POWER for two times

0.5A, 250V
fast type, φ5x20mm.

z 20A Input Terminal : Unfused.
zMaximum Display : 19999,updates 2~3

times/second.

zRange : Manual ranging.
zPolarity display : Automatically
zOverloading : Display
z Low Battery Indication : Display
zData Hold : Display" "
zTemperature: Operating: 0

o

C~40oC(32oF~104oF);

Storage: -10oC~50oC(14oF~122oF).

zRelative Humidity : 75% @ 0oC~ below 30oC;

50% @ 30

o

C~40oC

zAltitude: Operating : 2000m; Storage: 10000m.
zElectromagnetic Compatibility: In a radio field of 1 V/m,

Overall Accuracy = Specified Accuracy + 5% of Range;
in a radio field of more than 1 V/m, no assigned
accuracy is specified.

zBattery Type : One piece of 9V (NEDA1604

or 6F22 or 006P).

zDimensions : 179x88x39mm.
zWeight : Approx.380g (including

holster and battery)

V

o

C input jack's fuse:0.63A,250V fast type, 5x20mm,
to be used on capacitance,temperature and transistor
testing input protection.

General Specifications

" ".

1

" ".

-

H.Temperature

I. Capacitance

J. Transistor

Test ing

Conditions

Overload

Protection

~
~

~
~

250V rms

±(3%+70)
±(1%+30)
±(2%+50)

hFE

This section provides basic maintenance information
including battery and fuse replacement instruction.

Maintenance

Warning
Do not attempt to repair or service your Meter unless
you are qualified to do so and have the relevant
calibration, performance test, and service information.
To avoid electrical shock or damage to the Meter, do
not get water inside the case.

A. General Service

z Periodically wipe the case with damp cloth and mild
detergent. Do not use chemical solvent.
z To clean the terminals with cotton bar with detergent,
as dirt or moisture in the terminals can affect readings.
z Turn the Meter off when it is not in use and take out
the battery when not using for a long time.
z Do not store the Meter in place of humidity, high
temperature, explosive, inflammable and strong
magnetic field

B. Replacing the Fuses

(See Figure 10)

( Figure 10)

Holster

Screw

Warning
To avoid electrical shock or arc blast, or personal
injury or damage to the Meter, use specified fuses
ONLY in accordance with the following procedure.

To replace the Meter's fuse:

1. Turn the Meter off and remove all connections from
the terminals.

2. Remove the holster from the Meter.

3. Remove the 3 screws from the case bottom, and
separate the case top from the case bottom.

4. Remove the fuse by gently prying one end loose,
then take out the fuse from its bracket.

5. Install ONLY replacement fuses with the identical type
and specification and make sure the fuse is fixed firmly
in the bracket.
Fuse 1: 0.5A, 250V, fast type, 5x20mm

6. Rejoin the case bottom and case top, and reinstall the
3 screws and holster.
Replacement of the fuses is seldom required. Burning
of a fuse always results from improper operation.

C. Replacing the Battery (See Figure 10)

Warning
To avoid false readings, which could lead to possible
electric shock or personal injury, replace the battery
as soon as the battery indicator "

To replace the Meter's battery:

1. Turn the Meter power off and remove all connections
from the terminals.

2. Remove the holster from the Meter.

Fuse 2: 0.63A, 250V, fast type, 5x20mm

" appears.

** END **

This operating manual is subject to change without notice.

3. Remove the 3 screws from the case bottom, and
separate the case top from the case bottom.

4. Remove the battery from the battery connector.

5. Replace with a new 9V battery (NEDA1604, 6F22 or
006P).

6. Rejoin the case bottom and case top, and reinstall
the 3 screws and the holster.

the

measuring accuracy may not be guaranteed

Connect
in parallel.

The capacitance ranges:

Overvoltage,

Double Insulation
standards

sinewave RMS value(AVG response)

C

C

200mV for full ranges.

200mV for full ranges

sinewave RMS value(AVG response)

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displayed value is 1000 digits. To ensure the accuracy,
please subtract this value from the display reading.

sounds

Copyright 2001 Uni-Trend Group Limited.

All rights reserved.