Tenma 72-10395 User manual

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Model: 72-10395
Pocket Size Digital Multimeter

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Please read these instructions carefully before use and retain for future
reference.
This digital multimeter is designed and manufactured in accordance with IEC61010,
double insulation, CAT II 600V overvoltage and pollution grade 2 safety standard.
Please operate according to this manual, otherwise the protection provided by the device
will be impaired or fail.
• Check the test leads, probe and case insulation function before using. If you nd
any breakage or abnormality, or you consider the device is broken, stop using the
device immediately.
• When using the test probes, keep your ngers behind the nger protection ring
• Ensure all inputs are less than the range selected otherwise it may cause electrical
shock or meter damage.
• Take caution when voltages are above 60V DC and 42V AC rms.
• Do not use the meter with the back cover removed.
• Do not adjust the range selector during measurement.
• Replace the batteries as soon as the low battery indicator appears on the display.
• Remove dead batteries from the meter or if it is not going to be used for a long
time.
• Never mix old and new batteries together, or different types of batteries.
• Never dispose of batteries in a re, or attempt to recharge ordinary batteries.
• Before replacing the battery, turn off the meter and disconnect all the test probes.
• To prolong battery life turn off the meter after use.
ELECTRICAL SYMBOLS GUIDE
WHAT’S INCLUDED
• Digital palm size Multimeter with test leads.
• Instruction manual.
Low battery Grounding Warning
Continuity Buzzer AC DC
Fuse Double insulated Diode
IMPORTANT SAFETY INFORMATION
FUNCTIONS
1. LCD display
2. Select button (press to switch between resistance,
capacitance, diode or continuity measurements).
3. REL button (relative value measurement).
4. Range selector.
5. Hz / % measurement (press this button to switch
between DC V, AC V and Hz / %).
6. Data Hold (press this button to hold displayed
values).
7. Positive input end (red test probe).
8. Negative input end (black test probe).

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OPERATING PARAMETERS
• Ambient temperature: 23ºC ± 5ºC.
• Relative humidity: ≤75%
• Auto power off - the meter will enter the standby mode if there is no operation of
the range selector and buttons within 30 minutes. In standby mode it can be re-
activated by pressing any button or turning the range selector.
• Pressing SELECT button to activate the meter will cancel Auto Power Off function.
Function Range Res
olution
Accuracy
± (a%
readings
+b digits)
Input
Protection Description
Capacitance
CAP (F)
4.000nF 0.001nF
600V AC
For ref only
40.00nF 0.01nF
±(4%+3)
Measuring in relative
measuring mode, the open
circuit voltage is around
0.45V
400.0nF 0.1nF
4.000μF 0.001μF
40.00μF 0.01μF
100μF 0.1μF ±(5%+10)
When measured
capacitance is
above“100μF”, the reading
is for reference only
Frequency
(Hz)
99.9Hz 0.1Hz
±(0.5%+3) 600V AC
Input sine wave,
10Hz~10kHz:≥1Vrms
10kHz~100kHz:≥30Vrms
0.999kHz 0.001kHz
9.99kHz 0.01kHz
99.9kHz 0.1kHz
Duty Cycle 0.1%~99.9% 0.10% 600V AC
Press DUTY button to
switch to the measuring
mode when the knob is
turned to AC/DC stall (the
reading is for reference
only)
Diode 1mV 0.5V~0.8V 600V AC Open circuit voltage is
about 1.5V
Buzzer
Continuity 0.1Ω ~ ≤60Ω 600V AC
Continuity resistance
≤60Ω: buzzer beeps;
>60Ω: not necessarily
to beep, and displays
approximate resistance
value with unit “Ω”
Low Voltage
Indication ~ <2.4V icon appears

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OPERATION
DC voltage measurement (See Figure 2)
• Turn the range selector to DC V, Auto and DC icons appear on the LCD.
• Connect the black test probe to the cathode of the power to be measured and the
red test probe to the anode of the power to be measured.
• Read measuring results displayed on the LCD.
• If the probes are reversed polarity, then the LCD will display negative readings.
Figure 2 Figure 3
AC voltage measurement (See Figure 3)
• Turn the range selector to AC V, Auto and AC icons appear on the LCD.
• Connect the black test probe to the cathode of the power to be measured and the
red test probe to the anode of the power to be measured.
• Read measuring values displayed on the LCD.
• If the probes are reversed polarity, then the LCD will display negative readings.
Notes:
• Do not attempt to measure above 600V, you may get desired values, however, it
may risk damaging the meters internal wiring.
• To avoid electric shock, please use it with extreme caution when measuring high
voltages.
• Disconnect test probes from the circuit after nishing measurement.

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Resistance measurement (See Figure 4)
• Turn the range selector to
• Connect test probes in parallel to the resistance to be measured;
• Read measured results on the display.
Notes:
• To avoid meter damage, when making in-circuit
measurements make sure the circuit power
is turned off and all capacitance has been
discharged before measurement.
• As for 400Ω resistance measurement, test probes
will cause 0.1Ω~0.3Ω measuring deviation. In
order to get accurate readings, the ultimate results
should subtract the short circuit reading values
of the red and black test probes. It is suggested
to perform the operation in relative value
measurement mode.
• The meter displays “OL” when no signal is input,
for instance in open circuit condition.
• For measurement≥1MΩ, it normally takes several
seconds to get stable readings
Frequency and duty cycle measurement (See Figure 5)
• Turn the range selector to Hz/%, DC V or AC V.
• Press Hz/% button to access frequency
measurement.
• Connect test probes in parallel to frequency signal
source to be measured.
• Read measured results on the display.
• Press Hz/% button again to access
% measurement.
Notes:
• The measured resolution based on frequency and
waveform will vary slightly. The meter resolution
has been set according to sine wave.

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Diode and continuity measurement (See dotted part in Figure 6)
• Turn the range selector to
• Press SELECT button to access diode mode (press
it again to switch to continuity test).
• If connect test probes to the diode to be measured
(with black test probe to cathode and red test probe
to anode), then the reading on LCD will be an
approximate value of diode forward voltage drop
(when connecting test probes to both ends of the
circuit to be measured, if the resistance between
these two ends is ≤60Ω, the built-in buzzer will
sound and the resistance value appears on LCD).
Notes:
• If the measured diode is under open circuit status
or the polarity is wrongly connected (namely, with
black test probe connecting to anode and red test
probe to cathode), LCD will display “OL”.
• This meter can measure the voltage drop of PN joint of diode and other
semiconductors. For a silicon semiconductor with normal structure, the reading of
the forward voltage drop should be within 0.5~0.8V.
• To avoid meter damage, before measuring the resistance in line, please make sure
the measured circuit power is turned off, and all capacitance has been discharged.
• In order to avoid meter damage or injury, do not input voltage above 60V DC or
30Vrms AC.
Capacitance measurement (See Figure 7)
• Turn the range selector to
• As there is a capacitance reading displayed under
open circuit status, please select relative value
measuring mode.
• Press REL button once.
• Connect test probes to the capacitance to be
measured, and read data on LCD.
Notes:
• Turn off all power in the measured circuit and fully
discharge all capacitors before measurement.
• If the capacitance being measured has polarity,
the red probe is connected to the anode and the
black one to the cathode of capacitance.
• It normally takes several seconds to display the value when measuring
capacitance higher than 10uF.
• To avoid meter damage or injuries, do not measure voltage above 60V DC or
30Vrms AC.

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GENERAL SPECIFICATIONS
Function Range Res
olution
Accuracy
± (a%
readings
+b digits)
Input
Protection Description
DC
Voltage
(DC V)
4V 1mV
± (0.8%+1) 600V DC
600V AC
Input impedance
≥10MΩ
40V 10mV
400V 100mV
600V 1V ± (1%+3)
AC
Voltage
(AC V)
4V 1mV
± (1.2%+3)
600V DC
600V AC
Input impedance
≥10MΩ;
Frequency response:
40~400Hz;
Display: RMS of
sine wave
(mean value
response)
40V 10mV
400V 100mV
600V 1V ± (1.5%+5)
Resistance
(Ω)
400Ω 0.1Ω ± (1.2%+2)
600V AC Open circuit voltage
is about 0.45V
4kΩ 1Ω
± (1%+2)
40kΩ 10Ω
400kΩ 100Ω
4MΩ 1kΩ ± (1.2%+2)
40MΩ 10kΩ ± (1.5%+2)
BATTERY REPLACEMENT
• If icon appears on LCD, please replace the battery as follows:
• Disconnect test probes from circuits being
measured, turn range selector to OFF position.
• Remove the screw and lift off the back cover.
• Replace the 3V battery with a new one
(Lithium-manganese button cell, 3V, model:
CR2032).

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INFORMATION ON WASTE DISPOSAL FOR CONSUMERS OF
ELECTRICAL & ELECTRONIC EQUIPMENT
These symbols indicate that separate collection of Waste Electrical and Electronic Equipment
(WEEE) or waste batteries is required. Do not dispose of these items with general household
waste. Separate for the treatment, recovery and recycling of the materials used. Waste batteries
can be returned to any waste battery recycling point which are provided by most battery retailers.
Contact your local authority for details of the battery and WEEE recycling schemes available in
your area.
Made in China. PR2 9PP
Man Rev 1.0