Tenma 72-3540 User manual

1
True RMS Datalogging
Multimeter
Model: 72-3540

2
CONTENTS
Page Number Details
4 Important Safety Information
5 What’s Included
5 Product Overview
5 LCD
6 Buttons
6Input Terminals
7 Rotary Switch
7General Specication
8Electrical Specication
8 AC Voltage
9 DC Voltage
9 AC Voltage + DC Voltage
10 AC Current
10 DC Current
10 AC Current + DC Current
11 Resistance
11 Capacitance
12 Conductance
12 Temperature
12 Frequency
12 Duty Cycle
13 Pulse Width
13 Continuity Test
13 Diode Test
13 Measurement Operations - Meter Power Control
14 Meter Settings
16 AC Voltage
16 DC Voltage
17 AC & DC Current
17 Resistance
18 Conductance
19 Capacitance
19 Continuity Test

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Page Number Details
20 Diode
20 Frequency / Duty Cycle Measurement / Pulse Width
21 Temperature
21 LPF Measurement
22 dBV
22 dBm
22 Maximum & Minimum Value
23 Relative Value
23 Peak Detection
23 Compare Mode Comp
24 Recording Measurement Data
26 Communication
27 Cleaning & Maintenance
28 Charging the Battery

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IMPORTANT SAFETY INFORMATION
• When using electrical appliances basic safety precautions should always be
followed.
• Never use a damaged meter. Before use, always check the meter case for cracks
or any missing parts.
• Inspect the test leads for any damaged insulation or exposed metal. If any test
lead is damaged, replace it before using the meter.
• Before using the meter, ensure the battery cover is closed and latched. Before
opening the battery cover, remove the test leads from the meter.
• Do not use the meter when removing the cover or opening the case.
• When the meter works at a voltage of 30V (rms) in AC, 42V (peak) in AC or over
60V in DC, special care should be taken as there is a danger of electric shock.
• Use the proper terminals, function and range for your measurement. Do not
operate the meter separately.
• When measuring the current, shut off the power to the circuit, then connect the
meter to the circuit. The meter and the circuit must be connected in series.
• When making electrical connections, connect the common test lead before
connecting the main test lead. When disconnecting, disconnect the main test lead
before disconnecting the common test lead. If the meter works improperly, do not
use it. The protection measures of the meter may have failed. If in doubt, send the
meter for repair.
• Do not store or use the meter in an environment of high temperature, humidity,
inammable, explosive and strong magnetic eld.
•When using the probes, keep your ngers behind the nger guards.
•Do not use the low-pass lter to verify hazardous voltage, for there may be a
voltage over the indicated value. Firstly, measure the voltage to check whether it is
hazardous in the case of not connecting a lter, then select low-pass ltering.
• Before testing resistance, continuity, conductance, diode or capacitor, shut off the
power to the circuit and discharge all high-voltage capacitors.
• Before measuring the current, check the fuses of the meter.
• Do not measure voltage or current higher than the allowed input values. When the
range of measured values cannot be determined, set the functional range switch
at the maximum-range position.
• When the low battery symbol is on the LCD, the battery should be charged as
soon as possible in order to ensure measurement accuracy.
• Do not arbitrarily change the wiring within the meter to avoid damaging the meter
and endangering safety.
•Test a known voltage before use to conrm the product is functioning correctly.
•If you need to replace the test lead, replace it with a test lead of the same or higher
grade of CAT III 1000V/CATIV 600V.
•When the meter detects voltage ≥30V or overload, the symbol “ ” will display as
a warning for a potential hazardous voltage.
Please read these instructions carefully before use and retain for future
reference.

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PRODUCT OVERVIEW
1. Case
2. LCD
3. Function keys
4. Rotary switch
5. Input terminals
Function Description
1. Label of function keys Indicates auxiliary functions under current measuring
interface.
2. Simulation bar Analogue display of input signals.
3. Minus sign Indicates negative reading.
4. Lighting symbol Danger - High voltage.
5. Time and date Indicates the time and date set in internal clock.
6. Small measurements Real-time input values are displayed when the primary.
7. Telecommunication Indicates the time and date set in the internal clock.
8. Buzzer Indicates the button sound is enabled.
9. Battery capacity Indicates the capacity level of rechargeable battery.
10. Range indicator Indicates the current range and range mode for the meter.
11. Unit Indicates the measurement unit.
12. Aided function display Indicates the aided measuring function, such as LPF.
13. Aided display Indicates the aided measuring information on input
signals.
LCD
WHAT’S INCLUDED
• One Datalogging Multimeter
• A pair of test leads
• Two K type temperature probes
• One user manual
• One temperature connector
• One charging adaptor
• One charging connector
• One USB cable
• One CD
•One zip bag

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BUTTONS
Button Function
Turn on or off the meter power.
F1 F2 F3 F4 Select the sub-functions and modes related to the functions of the
rotary switch.
Cursor buttons are used to select menu items, scroll reading
information and input data.
HOLD Keep the current reading on the display.
RANGE
Switch the range mode of the meter to manual mode, then take
turns to switch between all the available ranges.
Press and hold the button to return to automatic range measurment.
MAX MIN Starts to record MIN MAX values.
SELECT Press to select the complex function. Press and hold to access the
“Help” menu.
Press the button change the backlight brightness.
Press and hold to turn off the backlight.
INPUT TERMINALS
Terminal Description
A
Input terminals for measuring the current (maximum duration is
30 seconds for 20A overload and suspend for 10 minutes) and
frequency from 0A to 10.00A.
µA
mA
Input terminals for measuring the current and frequency from 0A to
600mA.
COM Common terminals for all measurements.
°C Hz
V Ω
Input terminals for measuring voltage, continuity, resistance, diode,
conductance, capacitance, frequency, period and duty cycle.
• In addition to the above, four terminals are used for charging and temperature
measurement through corresponding connectors.
•“Lead Error!” will show on the the display as a warning if the probes are inserted
incorrectly.

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ROTARY SWITCH
Switch Symbol Function
ṼMeasurement of AC voltage.
mṼ Measuremnt of mV in AC and mV in AC+DC.
VMeasurement of voltage in DC and AC+DC.
mV °C °F Measurement of mV in AC and temperature.
ΩnS Measurement of resistance, continuity and specific conductance.
Diode test and capacitance measurement.
Hz% mS-Pulse Measurement of frequency, duty cycle and pulse width.
µA Measurement of µA in AC, DC and AC+DC.
mA Measurement of mA in AC, DC and AC+DC.
A Measurement of ampere in AC, DC and AC+DC.
Battery charge.
GENERAL SPECIFICATION
Max. voltage between any terminal
and ground 1000V
Fuse protection of mA or µA input
terminals 0.8A H 1000V fuse type 6 x 32mm
Fuse protection of A input terminals 10A H 1000V fuse type 10 x 38mm
Max. display 60000
Range Auto/manual
Polarity Auto
Operating temperature -20°C~50°C
Storage temperature -30°C~60°C
Relative humidity ≤80% (0°C~30°C), ≤75% (30°C~40C), ≤45%
(40°C~50C°)
Electromagnetic compatibility
In the RG-eld of 1V/m: overall accuracy =
specied accuracy + 5% of range.
No specied index for the RF-eld over 1V/m.

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No specied index for RF-eld over
1V/m
Operating altitude 0~2000m
Temperature coefcient 0.1 x (specied accuracy)/°C (<18°C or
>28°C)
Internal battery Lithium battery of 7.4V~2200mAh
Power adaptor Input of 100V~240V, 50/60Hz
External diameter and internal
diameter 5.5mm (external) 2.5mm (internal)
Low battery symbol shows on the LCD
Dimensions 225 x 100 x 60mm
Weight 608g (inc. battery)
Safety standards
IEC/EN61010-1, EN61010-2-030, EN61010-
2-033 in pollution degree 2, CAT III 1000V,
CATIV 600V
IP rating IP65
ELECTRICAL SPECIFICATION
Accuracy
± (% reading + digits), one-year calibration period. If the
temperature variation of environment reaches ±5°C, the
accuracy can be adopted after 2 hours.
Ambient temperature 23°C ±5 °C
Ambient humidity ≤75%RH
Temperature
coefcient 0.1 x (accuracy)/C (<18C or >28°C)
AC VOLTAGE
Range Resolution Accuracy Tolerance: ± (% reading + digits)
60mV 0.001mV 45~1kHz 1k~10kHz 10k~20kHz 20k~100kHz
±(0.6% + 60) ±(1.2% + 60) ±(3% + 60) ±(4% + 60)
600mV 0.01mV 45~1kHz 1k~10kHz 10k~20kHz 20k~100kHz
±(0.3% + 30) ±(1.2% + 40) ±(3% + 40) ±(4% + 40)
6V 0.0001V 45~1kHz 1k~10kHz 10k~20kHz 20k~100kHz
±(0.3% + 30) ±(1.2% + 40) ±(3% + 40) ±(4% + 40)
60V 0.001V 45~1kHz 1k~10kHz 10k~20kHz 20k~100kHz
±(0.3% + 30) ±(1.2% + 40) ±(3% + 40) ±(4% + 40)

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600V 0.01V
45~1kHz 1k~10kHz 10k~20kHz 20k~100kHz
±(0.3% + 30) ±(1.2% + 40) ±(3% + 40) Only for
reference
1000V 0.1V
45~1kHz 1k~5kHz 5k~10kHz 10k~100kHz
±(0.6% + 30) ±(3% + 40) ±(6%+40) Only for
reference
•Input impedance: about 10MΩ.
•Overload protection: 1000V.
•Display: True virtual value for 10% to 100% of the range.
DC VOLTAGE
Range Resolution Accuracy tolerance: ± (% reading + digits)
60mV 0.001mV ± (0.025% + 20)
600mV 0.01mV
± (0.025% + 5)6V 0.0001V
60V 0.001V
600V 0.01V (0.03% + 5)
1000V 0.1V
AC VOLTAGE + DC VOLTAGE
Range Resolution Accuracy Tolerance: ± (% reading + digits)
60mV 0.001mV 50~1kHz 1k~10kHz 10k~20kHz
±(1% + 80) ±(1.2% + 60) ±(3% + 60)
600mV 0.01mV 45~1kHz 1k~10kHz 10k~20kHz
±(0.3%+30) ±(1.2%+40) ±(3%+40)
6V 0.0001V 45~1kHz 1k~10kHz 10k~20kHz
±(0.3%+30) ±(1.2%+40) ±(3%+40)
60V 0.001V 45~1kHz 1k~10kHz 10k~20kHz
±(0.3%+30) ±(1.2%+40) ±(3%+40)
600V 0.01V 45~1kHz 1k~10kHz 10k~20kHz
±(0.3%+30) ±(1.2%+40) ±(3%+40)
1000V 0.1V 45~1kHz 1k~5kHz 5k~10kHz
±(0.6%+30) ±(3%+40) ±(6%+40)
•Input impedance: about 10MΩ.
•Overload protection: 1,000V.
•Display: true virtual value for 10% to 100% of the range.

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AC CURRENT
Range Resolution Accuracy Tolerance: ± (% reading + digits)
600µA 0.01µA 45~1kHz 1k~10kHz
±(0.6% + 40) ±(1.2%+40)
6000µA 0.1µA 45~1kHz 1k~10kHz
±(0.6%+20) ±(1.2%+40)
60mA 0.001mA 45~1kHz 1k~10kHz
±(0.6%+40) ±(1.2%+40)
600mA 0.01mA 45~1kHz 1k~10kHz
±(0.6%+20) ±(1.2%+40)
10V 0.001A 45~1kHz 1k~10kHz
±(1%+20) ±(3%+40)
•Display: true virtual value for 10% to 100% of the range.
•Overload protection: µAmA range: 0.8AH 1000V fuse type ɸ 6x32mm.
•10A range: 10AH 1000V fuse type ɸ 10x38mm.
•Switch on for 30 seconds and suspend for 10 minutes for 20A. Not specied for
over 10A.
DC CURRENT
Range Resolution Accuracy tolerance: ± (% reading + digits)
600µA 0.01µA ± (0.08% + 10)
6000µA 0.1µA ± (0.08% + 10)
60mAV 0.001mA ± (0.08% + 20)
600mAV 0.01mA ± (0.15% + 10)
10A 0.001A (0.5% + 10)
•Overload protection: µAmA range: 0.8A H 1000V fuse type ɸ 6x32mm 10A range:
10AH 1000V fuse type ɸ 10x38mm.
•Switch on for 30 seconds and suspend for 10 minutes for 20A. Not specied for
over 10A.
AC CURRENT + DC CURRENT
Range Resolution Accuracy Tolerance: ± (% reading + digits)
60µA 0.01µA 50~1kHz 1k~10kHz
±(0.8% + 40) ±(2.0% + 40)
6000µA 0.1µA 50~1kHz 1k~10kHz
±(0.8% + 20) ±(2.0% + 40)

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60mA 0.001mA 50~1kHz 1k~10kHz
±(0.8% + 40) ±(2.0%+40)
600mA 0.01mA 50~1kHz 1k~10kHz
±(0.8% + 20) ±(2.0% + 40)
600V 0.001A 50~1kHz 1k~10kHz
±(1.2% + 20) ±(3% + 40)
•Display: true virtual value for 10% to 100% of the range.
•Overload protection: µAmA range: 0.8A H 1000V fuse type ɸ 6x32mm.
•10A range: 10AH 1000V fuse type ɸ 10x38mm.
• Measurements must not last for more than 30 seconds. Allow 10 minutes to
discharge between measurements. Do not attempt measurements over 10A.
RESISTANCE
Range Resolution Accuracy tolerance: ± (% reading + digits)
600Ω 0.01Ω In REL state: ± (0.05% + 10)
6kΩ 0.0001kΩ
± (0.05% + 2)60kΩ 0.001kΩ
600kΩ 0.01kΩ
6MΩ 0.0001MΩ ± (0.3% + 10)
60MΩ 0.001MΩ ± (2% + 10)
•Overload protection: 1,000V.
•Humidity: <50%.
CAPACITANCE
Range Resolution Accuracy tolerance: ± (% reading + digits)
6nF 0.001nF ± (3% + 10)
60nF 0.01nF ± (2.5% + 5)
600nF 0.1nF
± (2% + 5)
6µF 0.001µF
60µF 0.01µF
600µF 0.1µF
6mF 1µF ± (5% + 5)
60mF 10µF Not specied
•Overload protection: 1000V.
•Display digits: 6000.

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CONDUCTANCE
Range Resolution Accuracy tolerance: ± (% reading + digits)
60NS 0.01NS ± (2% + 10)
•Overload protection: 1,000V.
•Humidity for 60MΩ: <50%.
TEMPERATURE
Range Resolution Accuracy tolerance: ± (% reading + digits)
-40°C~40°C
0.1
± (2.0% + 30)
40°C~400°C ± (1.0% + 30)
400°C~1000°C ± 2.5%
-40°F~104°C
0.2°F
± (2.5% + 50)
104°F~752°F ± (1.5% + 50)
752°F~1832°F ± 2.5%
•Overload protection: 1000V.
• Two-channel temperature measurement can be performed via temperature
connectors.
•Temperature sensor: Applicable to K-type thermocouple. Spare parts are
point contact K-type thermocouple (only applicable to the measurement when
temperature is below 230°C).
FREQUENCY
Range Resolution Accuracy
60Hz 0.001Hz ± (0.02% + 8)
600Hz 0.01Hz
± (0.01% + 5)
6kHz 0.0001kHz
60kHz 0.001kHz
600kHz 0.01kHz
6MHz 0.0001MHz
60MHz 0.001MHz
•Overload protection: 1000V.
•Input amplitude: 10Hz~30MHz:
600mV ≤ a ≤ 30Vrm.
Greater than 30MHz: not specified.
DUTY CYCLE
Range Resolution Accuracy tolerance: ± (% reading + digits)
10%~90%
(10Hz~2KHz) 0.01% ± (1.2% + 30)

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Range Resolution Accuracy tolerance: ± (% reading + digits)
250mS 0.001mS~0.01mS ± (1.2% + 30)
PULSE WIDTH
•Overload protection: 1000V.
• When the rise time is less than 1µs, the signals centre on the trigger level.
•The pulse width is greater than 2µs for 10Hz to 200kHz. The pulse width depends
on signal frequency.
CONTINUITY TEST
Range Resolution Remark
0.01Ω
Open circuit voltage is around 3V. When the buzzer selects
short circuit for sound warning, the resolution is less than
10Ω. If the buzzer continuously sounds, the resolution is
greater than 50Ω. The buzzer does not sound.
When the buzzer selects open circuit for sound warning,
the resolution is greater than 50Ω. The buzzer continuously
sounds, the resolution is less than 10Ω. The buzzer does not
sound.
•Overload protection: 1000V.
DIODE TEST
Range Resolution Remark
0.0001V
Open circuit voltage is around 3V. The forward voltage drop
value of the measured PN junction is approximately ≤3V.
When the buzzer activates, it will beep briefly for the normal
semiconductor junction. If the semiconductor junction shorts
out it will beep continuously. Silicon PN junction drops
between 0.5~0.8V as the normal value.
•Overload protection: 1000V.
MEASUREMENT OPERATIONS
METER POWER CONTROL
Manually start up and shut down the meter power.
• Press and hold the power button to start the meter.
• When the meter is on, press and hold the power button to shut the meter down.
• The meter cannot be powered off when charging.
Indicators for Battery Capacity
• The meter is powered by lithium battery. The indicators for the battery capacity are
in the top right corner of the display.
•Various indicators for battery capacity are described in the following table:

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Symbol Battery capacity
Full capacity
Half capacity
Empty
• When the battery capacity is lower
than 3% of full capacity the meter will
automatically shutdown.
Backlight Control
• If the display is not visible in low-light situations, press to switch the backlight
brightness.
• Press and hold the key to turn off the screen and enter power saving mode.
•When in power saving mode, the power button will ash green to indicate that the
meter is still collecting data.
• Press any button or turn the rotary switch to turn on the backlight again.
Auto Power-Off
• If no buttons are pressed or there is no turn of the rotary switch within the set time
the meter will automatically shutdown.
• Press and hold the power button to restart the meter.
•When the “POWER OFF” setting has been set to “OFF”, auto power-off will be
disabled.
Power Saving Mode
•Set the “brightness down”, “display off” and “power off” times for backlight
brightness via the “AUTO POWER SAVE” option.
METER SETTINGS
• Press the function button SETUP to set and view the relevant information on the
meter. Press the directional buttons to select the relevant menu items of the meter
as follows:
Keypad Tone
•Set to “ON” to enable button sounds and “OFF” to disable button sounds.
• The sound symbol in the top right-hand corner will appear when sound is on and
disappear when the sound is switched off.
Lead Alarm Buzzer
•Set to “ON” to enable the alarm sound for an incorrect probe insertion and to
“OFF” to disable the alarm sound for a mis-inserted probe.
Communication
•Set to “ON” to enable USB or Bluetooth communication. The symbol will
appear in the top left-hand corner.
•Set to “OFF” to disable USB or Bluetooth communication and the symbol will
disappear.
Date & Time
• Press the function button SET to set the date and time.

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• Use the left and right directional buttons to select the required edit position, then
press the up and down directional buttons to enter different numbers.
• Press the function button OK to conrm.
• To cancel the settings, press the function button CANCEL.
Auto Power Save
• Press the function button SET to set the control time of the automatic reduction for
backlight brightness of the display and auto power-off time.
• Press the left and right buttons to move the cursors to select different settings.
• Press the up or down button to enter the time for power saving mode.
Menu Item Description Set Value
Brightness Down
Control time of automatic
reduction for backlight
brightness.
ON: 1-60 min. OFF: Function
disabled.
Display Off Off time of display ON: 1-60 min. OFF: Function
disabled.
Power Off Auto power-off time ON: 1-60 min. OFF: Function
disabled.
• Press the function button OK to conrm the above settings.
• To cancel the setting, press the function button CANCEL.
More Settings
• Press the function button ENTER to set the language, memory format, reset the
meter settings, check the product model, serial number and available memory
space.
• Press the directional buttons to select the relevant menu items for the meter as
follows:
Help Menu Language
• Press the function button SET to set the languages of help information.
• Press the left and right directional buttons to select a different language, then
press the function button OK to conrm.
Memory Format
• Press the function button FORMAT to enter the memory format, then press the
function button YES to conrm.
• To cancel the format, press the function button NO.
Reset All Settings
• Press the function button RESET to reset the menu with default settings, then
press the function button YES to conrm.
• To cancel the reset, press the function button NO.
About
• Press the function button ABOUT to check the product model, serial number and
available memory space.

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AC VOLTAGE
• Insert the red test lead into the V terminal and the black test lead into the COM
terminal.
• Set the rotary switch to Ṽor mṼ as shown in the image below.
• Read the measured voltage values on the display. True virtual values are
displayed for AC measurement.
• Press the function button MENU to access the sub-menus in which basic AC
voltage measurements can be modied.
• Press the directional buttons to choose between the sub-menu options.
•Each sub-menu, when highlighted, will present additional options for measurement
display.
• The red cursor button indicates the selected item.
Warnings
• Do not input a voltage higher than 1000V.
Higher voltage may be measured but it
risks damaging the meter.
• When measuring high voltage, extra
care should be taken to avoid an electric
shock.
• After completing all the measuring
operations, disconnect the connection
between the test leads and the circuit
under test.
• The response mode of AC coupled true RMS is adopted for the conversion of AC
with sinusoidal input calibration. The accuracy of non-sinusoidal wave must be
adjusted based on the following:
- For crest of 1.4~2.0, the accuracy should be adjusted by 1.0%.
- For crest of 2.0~2.5, the accuracy should be adjusted by 2.5%.
- For crest of 2.5~3.0, the accuracy should be adjusted by 4.0%.
DC VOLTAGE
• Insert the red test lead into the V terminal and the black test lead into the COM
terminal.
• Set the rotary switch to DC V or DC mV as shown below. Connect the test leads to
the power or load under test in parallel.
• Directly read the measured voltage values on the display.
• Press the function button MENU to enter
one menu item in which basic DC voltage
measurement can be modied.
• Press the directional buttons to choose
between the sub-menu options.
•Each sub-menu, when highlighted, will
present additional options for measurement
display.
• The red cursor button indicates the
selected item.

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Warnings
• Do not input a voltage higher than 1000V. Higher voltage may be measured but it
risks damaging the meter.
• When measuring high voltage, extra care should be taken to avoid an electric
shock.
• After completing all the measuring operations, disconnect the connection between
the test leads and the circuit under test.
AC & DC CURRENT
• Insert the red test pen into the µA, mA or A terminal and the black test lead into the
COM terminal.
• Set the rotary switch to the position as shown below. Press SELECT to choose
the required AC or DC to be measured. Connect the test leads to the test circuit in
series.
• Directly read the measured current values on the display. True virtual values are
displayed for AC measurement.
• Press the function button
MENU to enter a sub-menu
option in which basic AC or DC
current measurement can be
modied.
• Press the directional buttons to
choose between the options.
• The red cursor button indicates
the selected item.
Warnings
•Before connecting to the test circuit in series, turn off the power to the circuit rst
and discharge all the high-voltage capacitors.
•Use proper input terminals and functions for measurement. If the current size
cannot be estimated, the range of large current should be measured rst.
• When the test lead is inserted into the input terminal of current, do not connect
its test probe to any circuit in parallel as it will blow the fuses within the meter and
damage the meter.
• After completing all the measuring operations, disconnect the connection between
the test leads and the circuit under test.
RESISTANCE
•Insert the red test lead into the Ω terminal and the black test lead into the COM
terminal.
• Set the rotary switch to the measurement Ω nS where Ω is the default
resistance measurement. Connect the test leads to both ends of the measured
resistance.
• Directly read the measured resistance values on the display.
Warnings
• If the open circuit of the measured resistance or resistance value exceeds the

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maximum range of the meter, “OL” will show on
the display.
• When measuring in-circuit resistance, all of the
power within the measured circuit must be shut
off before measurement and all of the capacitors
must be discharged to ensure a correct
measurement.
• When measuring low resistance, the test lead will
bring about measurement errors of resistance
between 0.10 and 0.20Ω. To obtain accurate
readings, relative measurement can be adopted.
• Firstly, short the input test lead, then press the
MENU button and press F2 to enter the relative
measurement.
•Carry out the measurement of low resistance after
the meter has automatically subtracted the display value of the shorted test lead.
•If the resistance value is greater than 0.50Ω for a shorted test lead, the test lead
should be checked to see if any are loose.
•When measuring resistance above 1MΩ, the readings require a few seconds to
stabilise. It is normal for measurement of high resistance. In order to obtain stable
readings, short test lines can be used for the measurement.
• Do not input a voltage higher than 30V in AC (rms), AC (peak 42V) or 60V in DC to
avoid personal injury.
• After completing all of the measuring operations, disconnect the connection
between the test leads and the circuit under test.
CONDUCTANCE
•Insert the red test lead into the Ω terminal and the black test lead into the COM
terminal.
• Set the rotary switch to the measurement Ω nS . Press the SELECT button to
select conductance measurement 60nS.
• Connect the test leads to both ends of the measured resistance.
• Directly read the measured conductance value on the display.
Warnings
• When measuring the in-circuit resistance, all of the power within the measured
circuit must be shut off before measurement and all of the capacitors must be
discharged to ensure the correct measurement.
• Do not input a voltage higher than 30VAC (rms), AC (peak 42V) or 60V DC in
order to avoid personal injury.
• After completing all the measuring operations, disconnect the connection between
the test leads and the circuit under test.

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CAPACITANCE
CONTINUITY TEST
• Insert the red test lead into the terminal and the
black test lead into the COM terminal.
• Set the rotary switch to the measurement and
press the SELECT button to select capacitance
measurement.
• Connect the test leads to both ends of the measured
capacitance (see right).
• Directly read the measured capacitance on the display.
Warnings
• If the measured capacitance shorts or capacitance
value exceeds the maximum range of the meter “OL”
will show on the display.
• For the measurement of capacitance within small
range, relative measurement REL should be adopted to avoid the inuence of
distributed capacitance for correct readings.
• For the measurement of capacitance greater than 600µF, allow for more time to
gain the correct readings.
• To ensure the measuring accuracy, the capacitor should be discharged completely
then put into the meter to measure, especially for a capacitor with high voltage in
order to avoid damage to the meter and personal injury.
• Do not input a voltage higher than 30VAC (rms), AC (peak 42V) or 60V DC in
order to avoid personal injury.
• After completing all of the measuring operations, disconnect the connection
between the test leads and the capacitor under test.
• Insert the red test lead into the Ωterminal and the black test lead into the COM
terminal.
• Set the rotary switch to the measurement Ω nS and press the SELECT button
to enter one of the sub-menu options.
• If pressing the SHORT button, then the buzzer selects short circuit for alarm
sound. If the measured resistance between both ends is <10Ω, the buzzer
continuously sounds. If it is >50Ω the buzzer does not sound.
• When pressing the OPEN button, the buzzer selects open circuit. For the alarm to
sound continuously, the measured resistance between both ends must be >50Ω. If
it is <10Ω, the buzzer does not sound.
• Directly read the measured resistance value on the display.
Warnings
• When measuring the in-circuit resistance, all of the power within the measured
circuit must be shut off before measurement and all of the capacitors must be
discharged to ensure correct measurement.
• Do not input a voltage higher than 30VAC (rms), AC (peak 42V) or 60V DC in
order to avoid personal injury.
• After completing all of the measuring operations, disconnect the connection
between the test leads and the circuit under test.

20
DIODE
• Insert the red test lead into the terminal and the black test lead into the COM
terminal. The polarity of the red test lead is positive, and negative for the black test
lead.
• Set the rotary switch to the measurement where the diode measuring
mode is default. Connect the test leads to both ends of the measured diode as
shown in the image below right.
• Directly read the approximate forward PN junction voltage of the measured diode
on display.
• Press the function button MENU to view the menu options. If you select the
ALARM button, the buzzer sounds.
• If the semiconductor junction shorts out, it will beep continuously.
• Silicon PN junction drops between 0.5~0.8V as the normal value.
• If you select the NORMAL button, the buzzer will not sound.
Warnings
•If the measured diode is in open circuit or the polarity
is reversed, “OL” will display.
• When measuring the in-circuit diode, all of the power
within the measured circuit must be shut off before
measurement and all of the capacitors must be
discharged.
• Open-circuit voltage of the diode test is around 3V.
• Do not input a voltage higher than 30V in AC (rms),
AC (peak 42V) or 60V in DC to avoid personal injury.
• After completing all measurement operations,
disconnect the connection between the test leads
and the circuit under test.
FREQUENCY / DUTY CYCLE MEASUREMENT / PULSE WIDTH
• Insert the red test lead into the V terminal and the black test lead into the COM
terminal.
•Set the rotary switch to the measurement Hz% ms-Pulse.
• Press the SELECT button to choose between Hz / Duty% / ms-Pulse.
• Connect the test leads to the signal source under test in parallel as shown below
right.
• Directly read the measured values of frequency / duty
cycle / pulse width on the display.
Warnings
• The simulation bar displays the frequency of the
measured signal for duty cycle and pulse width.
• Do not input a voltage with higher frequency than
30Vrms to avoid personal injury.
• After completing all measurement operations,
disconnect the connection between the test leads and
the circuit under test.