Unit UT58D User manual

Overview
Warning
To avoid electric shock or personal injury, read the
Meter.
"Safety Information" carefully before using the
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 Holster
6 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 Warning identifies conditions and
actions that pose hazards to the user, or may damage
the Meter or the equipment under test.
ANote identifies the information that user should pay
attention to.
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:
zBefore 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.
zInspect 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.
zDo not apply more than the rated voltage, as
marked on the Meter, between the terminals or
between any terminal and grounding.
zThe 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.
zWhen 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.
zUse the proper terminals, function, and range for
your measurements.
zIf 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.
zDo 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 leads 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 specifica
-tions.
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
A. Measuring DC and AC Voltage(See Figure 3)
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.
AC or DC.
Fuse.
Continuity Test.
The Meter Structure (See Figure 1)
1 LCD Display
2POWER
3HOLD Button.
4 Rotary Switch
5COM Input Terminal
620A Input Terminal
7mA Input Terminal
8 Other Input Terminal. ( Figure 1)
Functional Buttons
Below table indicated for information about the functional
button operations
HOLD
(Blue
Button)
POWER
(Yellow
Button)
Turn the Meter on and off.
zPress down the POWER to turn on the
Meter.
zPress up the POWER to turn off the
Meter.
zPress HOLD once to enter hold mode.
zPress HOLD again to exit hold mode.
zIn Hold mode, is displayed and the
present value is shown.
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
HLx Inductance Test
Diode test
Continuity test
Resistance measurement.
Display Symbols (See Figure 2)
( Figure 2)
No. Symbol Description
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.
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.
9hFE The Unit of Transistor Test
10-15
mH, H
H: Henry. The unit of Inductance.
mH: Millihenry. 1 x 10-3 or 0.001
henry.
( Figure 3)
Black Red
The DC Voltage ranges are: 200mV, 20V, 200V and 1000V.
The AC Voltage ranges are: 2V, 200V and 1000V
To measure DC&AC Voltage, connect the Meter as follows:
1. Insert the red test lead into theV input terminal
and the black test lead into the COM input terminal.
2. Set the rotary switch to an appropriate measurement
position in V or V range.
3. Connect the test leads parallel across with the object
to be measured.
The measured value shows on the display.
Note
zIf the value of voltage to be measured is unknown,
use the maximum measurement position (1000V)
and reduce the range step by step until a satisfactory
reading is obtained.
zThe LCD displays
range is overloaded, it is required to select a higher
range in order to obtain a correct reading.
zIn each range, the Meter has an input impedance of
approx. 10M This loading effect can cause
measurement errors in high impedance circuits. If the
circuit impedance is less than or equal to 10 k ,the
error is negligible (0.1% or less).
zWhen voltage 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.
B. Measuring DC and AC Current (See Figure 4)
( Figure 4)
Black Red
"1" indicating the existing selected
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.
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 : 2mA, 200mA and 20A
To measure current, do the following:
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.
( Figure 5)
Black Red
C. Measuring Resistance (See 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
zIf 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.
zFor 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
zWhen 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
1. Insert the red test lead into the V input terminal and
the black test lead into the COM terminal.
2. Set the rotary switch to an appropriate measurement
position in range.
3. Connect the test leads with the object being measured
in parallel.
The measured value shows on the display.
Note
The test leads can add 0.1 to 0.3 of error to the low
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To obtain accurate readings in low-resistance, short-circuit
the input terminals beforehand and record the reading
obtained (called this reading as X). (X) is the additional
resistance from the test lead.
Then use the equation:
measured resistance value (Y) - (X) = accurate readings
of resistance.
zFor high resistance (>1M ), it is normal taking several
seconds to obtain a stable reading..
zWhen there is no input, for example in open circuit
condition, the Meter displays "1".
zWhen resistance 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.
D. Testing Diodes and Continuity (See Figure 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
( Figure 6)
Black Red
Digital Multimeter Model UT58D is a 2000-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, inductance, transistor, diode and continuity.
It is also equipped with data hold, full icon display and
sleep mode functions,etc;
Description
Measurement Operation

P/N:110401104225
voltages higher than 60V DC or 30V rms in AC.
Testing 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.
To test out a diode out of a circuit, connect the Meter as
follows:
Testing for Continuity
To test for continuity, connect the Meter as below:
1. Insert the red test lead into V 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 simultaneously
shows on the display and the unit is .
2. Set the rotary switch to .
3. For forward voltage drop readings on any semiconductor
component, place the red test lead on the component's
anode and the black test lead on the component's
cathode.
The measured value shows on the display.
Note
" "
Note
zWhen 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 Inductance (See Figure 7)
Operation of Hold Mode
(See Figure 9)
Warning
Maintenance
Make sure the tested inductance is far away from the
high electromagnetic field so as to to obtain accur
-ate reading.
( Figure 7)
The inductance ranges : 2mH, 20mH, 200mH and 20H.
To test for Inductance, connect the Meter as below:
1. According to the size of the tested object's leads,
insert multi-purpose socket or test clip into the mA
and Vterminal.
2. Set the rotary switch to an appropriate measurement
position in HLx 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.
( Figure 8)
( Figure 10)
F. Measuring Capacitance (See Figure 8)
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
higher than 60V DC or 30V rms in AC.
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
The measured value shows on the display.
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
he multi-purpose socket or connect the test clip to
he object being measured.
Note
zIf 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.
zWhen the tested capacitor is shorted or the capacitor
value is overloaded, the LCD display "1".
zTo minimize the measurement error caused by the
distributed capacitance, the testing lead should be
as short as possible.
zTo increase accuracy especially when measuring
small capacitance range 20nF, subtract the test leads'
open-circuit value from the display reading.
zIt is normal to take a longer time when testing a high
capacitor value.
zFor testing the capacitor with polarity, connect the
red clip or red test lead to anode and black clip or
black test lead to cathode.
zWhen capacitance testing has been completed,
remove the testing leads away from the multi-purpose
socket, and remove multi-purpose socket or test clip
away from the input terminal of the Meter.
-
( Figure 9)
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 μA current.
To activate the Meter, press POWER for two times.
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 .
""
""
""
Remarks:
zThe tested inductance: Q 10, Internal resistance
1.3k.
zWhen the tested inductance is >1H, the obtained
reading is only for reference.
Holster
Screw
Fuse
Battery
This section provides basic maintenance information
including battery and fuse replacement instruction.
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
zPeriodically wipe the case with damp cloth and mild
detergent. Do not use chemical solvent.
zTo clean the terminals with cotton bar with detergent,
as dirt or moisture in the terminals can affect readings.
zTurn the Meter off when it is not in use and take out
the battery when not using for a long time.
zDo not store the Meter in place of humidity, high
temperature, explosive, inflammable and strong
magnetic field
B. Replacing the Fuses (See Figure 10)
(See Figure 10)
** END **
This operating manual is subject to change without notice.
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.
Copyright 2001 Uni-Trend Group Limited.
All rights reserved.
disconn
-ect tested objects from multi-purpose socket or test
clip,
The capacitance ranges:
Continuous
sounds
The displayed
value is hFE
approx. value of
tested transistor
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