Tenma UT60C User manual

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Table of Contents
Title Page
Overview ------------------------------------------------------------------------------------------------------------------ 2
Unpacking Inspection -------------------------------------------------------------------------------------------------- 2
Safety Information ------------------------------------------------------------------------------------------------------ 3
Rules For Safe Operation ------------------------------------------------------------------------------------------- 3
International Electrical Symbols ----------------------------------------------------------------------------------- 4
The Meter Structure --------------------------------------------------------------------------------------------------- 5
Rotary Switch ----------------------------------------------------------------------------------------------------------- 6
Functional Buttons ----------------------------------------------------------------------------------------------------- 7
Display Symbols ------------------------------------------------------------------------------------------------------- 8
Measurement Ranges
A. Selecting a Measurement Range ----------------------------------------------------------------------------- 9
B. Manual Ranging and Autoranging ---------------------------------------------------------------------------- 9
Measurement Operation
A. DC Voltage Measurement -------------------------------------------------------------------------------------- 10
B. AC Voltage Measurement -------------------------------------------------------------------------------------- 11
C. Measuring Resistance ------------------------------------------------------------------------------------------ 12
D. Testing for Continuity ------------------------------------------------------------------------------------------ 13
E. Testing Diodes ---------------------------------------------------------------------------------------------------- 14
F. Capacitance Measurement ------------------------------------------------------------------------------------ 15
G. Frequency Measurement -------------------------------------------------------------------------------------- 16
H. Measuring Duty Cycle ------------------------------------------------------------------------------------------ 17
I. Temperature Measurement
(Model UT60C) -------------------------------------------------------------------------------------------------- 18
J. DC or AC Current Measurement ------------------------------------------------------------------------------ 18
Operation of Hold Mode ------------------------------------------------------------------------------------------- 20
The Use of Relative Value Mode ------------------------------------------------------------------------------- 20
The POWER Button --------------------------------------------------------------------------------------------------- 21
The BLUE Button ----------------------------------------------------------------------------------------------------- 21
Turning on the Display Backlight ------------------------------------------------------------------------------- 21
Sleep Mode (Model UT60C) --------------------------------------------------------------------------------------- 21
General Specifications ------------------------------------------------------------------------------------------- 21
Accuracy Specifications
A. DC Voltage ------------------------------------------------------------------------------------------------------- 22
B. AC Voltage -------------------------------------------------------------------------------------------------- ----- 22
C. Resistance ---------------------------------------------------------------------------------------------------- 22
D. Continuity Test -------------------------------------------------------------------------------------------------- 23
E. Diode Test ----------------------------------------------------------------------------------------------------- 23
F. Capacitance 23
G. Frequency & Duty Cycle -------------------------------------------------------------------------------------- 23
H. Temperature (Model UT60C) --------------------------------------------------------------------------------- 24
I. DC Current ------------------------------------------------------------------------------------------------------ 24
J. AC Current --------------------------------------------------------------------------------------------------------- 24
Maintenance
A. General Service -------------------------------------------------------------------------------------------------- 25
B. Testing the Fuses ------------------------------------------------------------------------------------------------ 25
C. Replacing the Battery ------------------------------------------------------------------------------------------ 26
D. Replacing the Fuses ------------------------------------------------------------------------------------------ 27

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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.
Digital Multimeter Model UT60C (hereafter referred to as “the Meter”) has autorange and manual range options with maximum
reading 3999. The enclosure structure design adopted advanced “co-injection” technique in order to provide sufficient insulation.
In addition to the conventional measuring functions, there is a RS232C standard serial port equipped with Model
for easy connection with computer to realize macro recording and monitoring and capture of transient dynamic data, displaying
change of waveform during the measurement, providing data and evidence to engineering technicians for scientific research. This is
also a highly applied digital multimeter of good performance with full overload protection and backlight function. also has true rms
reading for AC voltage and AC current measurements.
Except where noted, the descriptions and instructions in this Operating Manual apply to all UT60C.
Unless otherwise identified, all figures show the .
Unpacking Inspection
Open the package case and take out the Meter. Check the following items carefully to see any missing or damaged part:
Item Description Quantity
1Operating Manual 1 piece
2Test Lead 1 pair
3Test Clip
4Model UT60C Point Contact Temperature Probe
1 piece
59V Battery (NEDA1604, 6F22 or 006P) (installed)
6: RS232C Interfact Cable
7: CD-ROM (Installation Guide & Computer Interfact Software)
In the event you find any missing or damage, please contact your dealer immediately.

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Safety Information
This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. III 1000V, CAT. IV 600V;)and
double insulation.
CAT. III: Distribution level, fixed installation, with smaller transient overvoltages than CAT. IV
CAT IV: Primary supply level, overhead lines, cable systems etc.
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 6.
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:
•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.
•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.
•Do not apply more than the rated voltage, as marked on the Meter, between the terminals or between any terminal and
grounding.
•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.
•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.
•Use the proper terminals, function, and range for your measurements.
•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.
•When using the test leads, keep your fingers behind the finger guards.
•Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, current, or
capacitance.

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•Before measuring current, check the Meter’s fuses and turn off power to the circuit before connecting the Meter to the circuit.
•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.
•Remove test lead, temperature probe, RS232C interface cable and test clip from the Meter and turn the Meter power off before
opening the Meter case.
•When servicing the Meter, use only the same model number or identical electrical specifications replacement parts.
•The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident.
•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.
•The Meter is suitable for indoor use.
•Under the environment with high (+/-4kV) electrostatic discharge, the Meter may not be operated as normal condition. The user
may require resetting the Meter.
•Please take out the battery when it is not being used for a prolonged period to avoid damages to the Meter.
•Please 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) Deficiency of Built-In Battery
DC (Direct Current) Continuity Test
AC or DC Diode
Grounding Capacitance Test
Double Insulated Fuse
Warning, Refer to the Operating
Manual Conforms to Standards of European Union

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The Meter Structure (see figure 1)
1. LCD Display.
2. Functional Buttons.
3. Rotary Switch.
4. HzV Input Terminal:
Input for voltage, frequency/duty cycle, resistance, diode, continuity and capacitance measurements.
5. COM Input Terminal:
Return terminal for all measurements.
6. : µAmA Input Terminal:
Input for 0.1 µA to 400.0mA current measurements.
Model UT60C µAmA°C Input Terminal:
Input for 0.1 µA to 400.0mA current measurements and temperature testing.
7. 10A Input Terminal:
Input for 0.01A to 10.00A current measurements.

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Rotary Switch
Below table indicated for information about the rotary switch positions.
Rotary
Switch
Position Function
DC voltage measurement range from 400.0mV to 1000V or
AC voltage measurement range from 4.000V to 750.0V.
Continuity test.
Diode test.
Resistance measurement range from 400.0Ωto 40.00MΩ.
Capacity test range from 40.00nF to 100.0µF.
Model UT60C Temperature in Celsius from -40°C to 1000°C.
Hz Frequency measurement range from 10.00Hz to 10.00MHz.
AC or DC current measurement range from 400.0µA to 4000µA.
AC or DC current measurement range from 40.00mA to 400.0mA.
AC or DC current measurement range from 4.000A to 10.00A.

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Below table indicated for information about the functional button operations.
Button Measuring
Function Operation Performed
Power Any rotary switch
position Turn the power on and off.
Switches between AC and DC voltage; the Meter beeps. DC is default.
: Switches between continuity and diode and resistance
measurements; the Meter beeps. Resistance is default.
Model UT60C Switches between continuity and diode and
resistance and capacitance measurements; the Meter beeps.
Resistance is default.
Switches between AC and DC current range from 400.0 A to
4000 A; the Meter beeps. DC is default.
Switches between AC and DC current range from 40.00mA to
400.0mA; the Meter beeps. DC is default.
Switches between AC and DC current range from 4.000A to 10.00A; the
Meter beeps. DC is default. Disable Sleep Mode feature.
Functional Buttons (2)
Range
Any rotary
switch
position
exceptHz
and
••Press RANGE to enter the manual ranging mode; the Meter beeps.
Manually selecting a range causes the Meter to exit the Hold and REL
modes.
••Press RANGE to step through the ranges available for the
selected function; the Meter beeps.
••Press and hold RANGE for 2 seconds to return to autoranging;
the Meter beeps.
Hz %
Hz 1. Press to start the frequency counter; the Meter beeps.
2. Press again to enter duty cycle mode; the Meter beeps.
3. Press again to return to the frequency counter mode; the Meter beeps.
1. Press to start the frequency counter; the Meter beeps.
2. Press again to enter duty cycle mode; the Meter beeps.
3. Press again to return to the previous measurement mode; the Meter beeps.
REL∆∆
Any rotary
switch
position
except Hz
Press REL∆∆to enter and exit the REL mode in any measuring mode except in frequency/duty
cycle; the Meter beeps.
Hold Any rotary
switch
position
Press HOLD
to enter and exit the Hold mode in any mode, the Meter beeps.
Functional Buttons (1)

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Display Symbols (1) (see figure 2)
Number Symbol Meaning
1 AC Indicator for AC voltage or current. UT60C The displayed value is the mean value. : The displayed value is the
true rms value.
2 TRMS The : Indicator for true rms value.
3 AUTO The Meter is in the auto range mode in which the Meter automatically
selects the range with the best resolution.
4 RS232C Data output. It is always on the LCD, but data output is only in progress when the Meter is connected to the computer via the included RS232C
Interface Cable.
5 % Percent: Used for duty cycle measurements.
6 H Data hold is active.
7The REL is on to display the present value minus the stored value.
8
The battery is low.
Warning To avoid false readings, which could lead to possible electric
shock or personal injury, replace the battery as
soon as the battery indicator appears.
9Centigrade. The unit of temperature.
10 Test of diode
11 The continuity buzzer is on.

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Number Symbol Meaning
12 to 16
Ω, kΩ,
MΩ
Ω: Ohm. The unit of resistance.
kΩ: kilohm. 1 x 103or 1000 ohms.
MΩ: Megaohm. 1 x 106or 1,000,000 ohms.
F, µF,
nF
F: Farad. The unit of capacitance.
mF: Microfarad. 1 x 10-6 or 0.000001
nF: farads.z
Nanofarad. 1 x 10-9 or 0.000000001 farads.
Hz,
kHz,
MHz
Hz: Hertz. The unit of frequency in cycles/second.
kHz: Kilohertz. 1 x 103or 1,000 hertz.
MHz: Megahertz. 1 x 106or1,000,000 hertz.
V, mV V: Volts. The unit of voltage.
mV: Millivolt. 1 x 10-3 or 0.001 volts.
A, mA,
µA
A: Amperes (amps). The unit of current.
mA: Milliamp. 1 x 10-3or 0.001 amperes.
µA: Microamp. 1x 10-6 or 0.000001
amperes.
17 Indicates negative reading.
18 The input value is too large for the selected
range.
Display Symbols (1) (see figure 2)
Measurement Ranges (1)
A measurement range determines the highest value the Meter can measure. Most Meter functions have more than one range.
See “Accuracy Specifications.”
A. Selecting a Measurement Range
Being in the right measurement range is important:
••If the range is too low for the input, the Meter displays to indicate an overload.
••If the range is too high, the Meter will not display the most accurate measurement.
B. Manual Ranging and Autoranging
The Meter has both manual range and autorange options:

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Measurement Ranges (2)
••In the autorange mode, the Meter selects the best range for input signals. This allows you to switch test points without
having to reset the range.
••In the manual range mode, you may select the range. This allows you to override autorange and lock the Meter in a specific
range.
The Meter defaults to the autorange mode in measurement functions that have more than one range. When the Meter is in the
autorange mode, AUTO is displayed.
To enter and exit the manual range mode:
1. Press RANGE.
The Meter enters the manual range mode and AUTO turns off. Each presses of RANGE increments the range. When the highest
range is reached, The Meter wraps to the lowest range.
2. To exit the manual range mode, press and hold RANGE for two seconds. The Meter returns to the autorange mode and AUTO is
displayed.
Note
••If you manually change the measurement range after entering the REL or Hold recording modes, the Meter exits these
modes.
••Under frequency/duty cycle and capacitance measurement, only autorange mode is available.
Measurement Operation (1)
A.DC Voltage Measurement
(see figure 3)
Warning
To avoid harms to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than
1000VDC / 750VAC rms although readings may be obtained.
(figure 3)

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The DC Voltage ranges are: 400.0mV, 4.000V, 40.00V, 400.0V and 1000V. To measure DC voltage, connect the Meter as follows:
1. Insert the red test lead into the HzVΩΩterminal and the black test lead into the COM terminal.
2. Set the rotary switch to
; DC measurement is default or press BLUE button to select DC measurement mode.
3. Connect the test leads across with the object being measured. The measured value shows on the display.
Note
•In each range, the Meter has an input impedance of 10MΩ. This loading effect can cause measurement errors in high impedance
circuits. If the circuit impedance is less than or equal to 10kΩ, the error is negligible (0.1% or less).
•When DC 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 terminals of the Meter.
Measurement Operation (2)
B. AC Voltage Measurement (see figure 4)
Warning
To avoid harms to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than
1000VDC / 750VAC rms although readings may be obtained.
The AC voltage ranges are: 4.000V, 40.00V, 400.0V and 750.0V. To measure AC Voltage, connect the Meter as follows:
1. Insert the red test lead into the HzVΩΩterminal and the black test lead into the COM terminal.
2. Set the rotary switch to
and press BLUE button to select AC measurement.
3. Connect the test leads across with the object being measured. The measured value shows on the display.
(figure 4)

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Note
•In each range, the Meter has an input impedance of 10MΩΩThis loading effect can cause measurement errors in high impedance
circuits. If the circuit impedance is less than or equal to 10kΩΩ, the error is negligible (0.1% or less).
•When AC 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 terminals of the Meter.
•True root mean square value stability period ():
When the reading obtained is less than 100 digits, the true root mean square value converter needs a longer time to stabilize.
When there is no input voltage, the maximum reading displayed is 10 digits.
Measurement Operation (3)
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.
The resistance ranges are: 400.0ΩΩ, 4.000kΩΩ, 40.00kΩΩ, 400.0kΩΩ, 4.000MΩΩand 40.00MΩΩ. To measure resistance, connect the
Meter as follows:
1. Insert the red test lead into theHzV terminal and the black test lead into theCOM terminal.
2. Model UT60C
Set the rotary switch to
; resistance measurement (ΩΩ) is default or press BLUE button to select ΩΩmeasurement mode.
:
Set the rotary switch to
, resistance measurement (ΩΩ) is default or press BLUE button to select measurement mode.
3. Connect the test leads across with the object being measured. The measured value shows on the display.
(figure 5)

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Note
••The test leads can add 0.1ΩΩto 0.2ΩΩof error to resistance measurement. To obtain precision readings in low-resistance
measurement, that is the range of 400.0ΩΩ, short-circuit the input terminals beforehand, using the relative measurement
function button REL∆∆to automatically subtract the value measured when the testing leads are short-circuited from the reading.
Measurement Operation (4)
If ΩΩreading with shorted test leads is not ≤≤0.5ΩΩ, check for loose test leads, incorrect function selection, or enabled Data Hold
function.
For high-resistance measurement (>1MΩΩ), it is normal to take several seconds to obtain a stable reading.
The LCD displays
indicating open-circuit for the tested resistor or the resistor value is higher than the maximum range of the Meter.
When 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 terminals of the Meter.
D.Testing for Continuity
(see figure 6)
Warning
To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors
before testing for continuity.
To test for continuity, connect the Meter as below:
1. Insert the red test lead into the HzVΩΩterminal and the black test lead into the COM terminal.
2. Model UT60C Set the rotary switch to
and press BLUE button to select
measurement mode. :Set the rotary switch to and press
BLUE button to select
measurement mode.

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3. The buzzer sounds if the resistance of a circuit under test is less than around 70ΩΩ..
Note
The LCD displays indicating the circuit being tested is open.
Measurement Operation (5)
••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 terminals of the Meter.
E. Testing Diodes
(see figure 7)
Warning
To avoid possible damage to the Meter and to the device under test, disconnect circuit power and discharge all highvoltage
capacitors before 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 a diode out of a circuit, connect the Meter as follows:
1. Insert the red test lead into the HzVΩΩterminal and the black testlead into the COM terminal.
2. Model UT60C Set the rotary switch to
and press BLUE button to select
measurement mode. :Set the rotary switch to and press
BLUE button to select
measurement mode.

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3. For forward voltage drop readings on any semiconductor component, place the red test lead on the component’s anode and place
the black test lead on the component’s cathode. The measured value shows on the display.
Note
••In a circuit, a good diode should still produce a forward
Measurement Operation (6)
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.
••Connect the test leads to the proper terminals as said above to avoid error display. The LCD will display indicating diode being
tested is open or polarity is reversed.The unit of diode is Volt (V), displaying the forward voltage drop readings.
••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 terminals of the Meter.
F. Capacitance Measurement
(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.
The Meter’s capacitance ranges are: 40.00µF, 400.0µF, 4.000µF, 40.00µF, and 100.0µF. To measure capacitance, connect the Meter
as follows:
1. Insert the red test lead into the HzVΩterminal and the black test lead into theCOM terminal.
2. Model UT60C Set the rotary switch to
and press BLUE button to select nF measurement mode. : Set the rotary switch to
3. Connect the test leads across with the object being measured. The measured value shows on the display.
Note
••For testing the capacitor with polarity, connect the red clip to

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Measurement Operation (7)
anode & black clip to cathode instead of using test leads as mentioned above.
To minimize the effect of capacitance stored in the test leads, the test lead should be as short as possible. To measure a small value
of capacitance, use REL mode to remove the leads capacitance. Remaining voltage, insulated impedance, & dielectric absorption
from the capacitor may cause the measurement error.
It takes a longer time when testing a high capacitor value, the testing time is around 15 seconds in 100µF range.
The LCD
displays indicating the tested capacitor is shorted or it exceeds the maximum range.
When capacitance 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.
G. Frequency Measurement
(see figure 9)
The measurement range is from 10Hz to 10MHz. To measure frequency, connect the Meter as follows:
1. Insert the red test lead into the HzVΩΩterminal and the black test lead into the COM terminal.
2. Set the rotary switch to Hz; frequency measurement (Hz) is default or press Hz % to select Hz measurement mode.
3. Connect the test leads across with the object being measured. The measured value shows on the display.
Note
••When frequency 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.

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Measurement Operation (8)
••To obtain a stable reading when measuring input scope > 30V rms frequency signal:
Set the rotary switch to
Then press Hz% to select Hz measurement mode to obtain frequency value.
When input scope ≤≤30V rms, please follow the above step 2. carrying out the measurement.
••When making frequency measurement at voltage or current range, please mind the following signal requirement table:
Range Signal Requirement Frequency Range
≥1.0V 5Hz to 10kHz
≥5.0 5Hz to 20kHz
≥45V 45Hz to 4kHz
≥420 45Hz to 1.6kHz
≥45mA 5Hz to 5kHz
≥4A 45Hz to 1kHz
H. Measuring Duty Cycle (See figure 9)
The duty cycle measurement range is: 0.1% to 99.9%. To measure duty cycle, do the following:
1. Set up the Meter to measure frequency.
2. To select duty cycle, press until the % symbol is shown on the display.
3. Connect the test leads across with the object being measured. The measured value shows on the display.
Note
The LCD displays 000.0% indicating the input signal is high or low level.
When duty cycle 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.
To obtain a stable reading when measuring input scope >30V rms frequency singal:
Set the rotary switch to
Then press Hz% to select % measurement mode to obtain duty cycle value.
When input scope ≤≤30V rms, please follow the above step 2. carrying out the measurement.
4V
40V
400V
1000V/750V
mA
A

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Measurement Operation (9)
I. Model UT60C Temperature Measurement
(see figure 10)
The temperature measurement range is -40°C to 100°C to measure temperature, connect the Meter as follows:
1. Insert the red temperature probe into the µµAµµA°C terminal and the black temperature probe into the COM terminal.
2. Set the rotary switch to °C.
3. Place the temperature probe to the object being measured. The measured value shows on the display.
Note
••The Meter automatically displays the temperature value inside the Meter when there is no temperature probe connection.
••The included point contact temperature probe can only be used up to 250°C. For any measurement higher than that, the rod type
temperature probe must be used instead.
••When temperature 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.
J. DC or AC Current Measurement
(see figure 11)

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Warning
Never attempt an in-circuit current measurement where the open-circuit voltage between the circuit and ground is greater than 250V.
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.
Measurement Operation (10)
The current measurement has 3 measurement positions on the rotary switch:
The has a 400.0µµAand 4000µµArange, with auto ranging; the
has a 40.00mA and 400.0mA range, with auto ranging;
position has a 4.000A and 10.00A range, with auto ranging.
To measure current, do the following:
1. Turn off power to the circuit. Discharge all high-voltage capacitors.
2. Model UT60C Insert the red test lead into the or µµAµµA°C or 10A terminal and the black test lead into the COM terminal.
: Insert the red test lead into the or 10Aterminal and the black test lead into the µµAµµAor 10A terminal and the black test lead into
theCOM terminal. Use the10A terminal and
range if the current value to be tested is an unknown.
4. The Meter defaults to DC current measurement mode. To toggle between DC and AC current measurement function, press BLUE
button. UT60C AC current is displayed as effective value of sine wave (mean value response). : AC current is displayed as true rms
value.
5. Break the current path to be tested. Connect the red test lead to the more positive side of the break and the black test lead
to the more negative side of the break.
6. Turn on power to the circuit. The measured value shows on the display.
Note
True root mean square value stability period: ()
When the reading obtained is less than 100 digits, the true root mean square value converter needs a longer time to stabilize. When
there is no input voltage, the maximum reading displayed is 10 digits.
For safety sake, each measurement time for high current should be less than 10 seconds and the interval time between 2
measurements should be greater than 15 minutes.
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 terminals of the Meter.
3. Set the rotary switch to

Digital Multimeter
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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.
The Hold mode is applicable to all measurement functions.
••Press HOLD
to enter Hold mode; the Meter beeps.
••Press HOLD
again or RANGE or Hz % or turn the rotary switch to exit Hold mode; the Meter beeps.
••In Hold mode, isdisplayed.
The Use of Relative Value Mode
The REL mode applies to all measurement functions except frequency/duty cycle measurement. It subtracts a stored value from the
present measurement value and displays the result.
For instance, if the stored value is 20.0V and the present measurement value is 22.0V, the reading would be 2.0V. If a new
measurement value is equal to the stored value then display 0.0V.
To enter or exit REL mode:
••Use rotary switch to select the measurement function before selecting REL∆∆. If measurement function changes manually
after REL∆∆is selected, the Meter exits the REL mode.
••Press REL∆∆to enter REL mode, auto ranging turns off except under capacitance testing mode, and the present measurement
range is locked and display “0” as the stored value.
••Press REL∆∆again or turn the rotary switch to reset the stored value and exit REL mode.
Pressing HOLD
in REL mode makes the Meter stop updating. Pressing HOLD
again to resume updating.