Tenma 72-2600 User manual

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Model: 72-2600
Digital Multimeter

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Please read these instructions carefully before use and retain for future
reference.
This instrument is designed and manufactured in compliance with: G84793,
lEC61010-1, CAT III 600V Pollution Degree 2 and Double Insulation standards.
• Check the test leads, probes and case insulation 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.
• Do not use the meter with the back cover open.
• Select appropriate test range for measurements.
• Ensure all inputs are less than the range selected otherwise it may cause electrical
shock or meter damage.
• Do not change the range selector position during voltage or current
measurements.
• Do not apply a voltage over 600V between COM terminal and ground.
• Take caution when working voltages are above 60V DC or 30V AC rms.
• Do not connect the meter to voltage signals when the range selector is on current,
resistance, diode or continuity range.
• When measuring current, each single measurement should be shorter than 10
seconds. For current values over 5A, the wait period between each measurement
must be longer than 15 minutes.
• When a measurement has been completed, disconnect the testing probes from
the circuit under test.
• 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.
• CAT III: Measurement category III is for measurements performed in the building
installation. Examples are measurements on distribution boards, circuit-breakers,
and wiring, such as cables, bus-bars, junction boxes, switches and socket-outlets
in the xed installation, and equipment for industrial application and some other
equipment such as stationary motors with permanent connection to the xed
installation.
• Only use test leads and probes that are in compliance with IEC 61010-031, and
rated CAT III 600V.
SYMBOL GUIDE
Low battery Grounding Diode
Continuity Buzzer AC DC
IMPORTANT SAFETY INFORMATION

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WHAT’S INCLUDED
• Digital multimeter
• User manual
• Set of test leads
• 9V battery (installed)
FUNCTIONS
1. LCD Display
2. Power button
3. HOLD button
4. Range selector
5. Input terminals
DC VOLTAGE
Range Resolution Accuracy Input
Impedance
Overload
protection
200mV 10µV ±(0.05%+3)
Around
10MΩ
600VAC/DC
RMS
850V p-p
2V 100µV ±(0.1%+3)
20V 1mV
±(0.15%+5)200V 10mV
600V 10mV
1
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AC VOLTAGE
Range Resolution Accuracy Input
Impedance
Overload
protection
200mV 10µV ±(0.8%+10)
Around
10MΩ
600VAC/DC
RMS
850V p-p
2V 100µV ±(0.5%+10)
20V 1mV ±(0.6%+10)
200V 10mV
600V 100mV ±(0.8%+15)
• Displays effective value of sine wave.
• AC voltage frequency range 40Hz-400Hz

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DC CURRENT
AC CURRENT
Range Resoluon Accuracy Overload Protecon
2mA 0.1μA ±(0.5%+5) Fuse 500mA 600V
6 dia x 32mm
20mA 1μA
200mA 10μA ±(0.8%+5)
10A 1mA ±(2%+10) Fuse 10A 600V
6 dia x 32mm
Range Resoluon Accuracy Overload Protecon
2mA 0.1μA ±(0.8%+10) Fuse 500mA 600V
6 dia x 32mm
20mA 1μA
200mA 10μA ±(1.2%+10)
10A 1mA ±(2.5%+10) Fuse 10A 600V
6 dia x 32mm
• When <5A continuous measurement is allowed/
• When >5A use 10 seconds measurement at an interval of more than 15 minutes.
• Measured voltage drop 200mV for full range.
• When <5A continuous measurement is allowed/
• When >5A use 10 seconds measurement at an interval of more than 15 minutes.
• Measured voltage drop 200mV for full range.
• AC current frequency range 40hz - 400hz
• Display true RMS value (waveform coefcient is not more than 5).
RESISTANCE
Range Resoluon Accuracy Overload Protecon
200Ω0.01Ω±(0.5%+10)
600V AC/DC
RMS
2kΩ0.1Ω±(0.3%+3)
20kΩ1Ω
±(0.3%+1)200kΩ10Ω
2MΩ100Ω
20MΩ1kΩ±(0.5%+1)
• Open circuit voltage about 3V (for 200Ω range).
• Short circuit the test leads when using 200Ω range to measure and subtract this
gure from the subsequent measured values to obtain an accurate reading.
• Input sensitivity ≤200mVrms
• The maximum input amplitude ≤30Vrms
• Overload protection 600Vrms.
FREQUENCY
Range Accuracy Max Resoluon
20kHz ± (1.5%+5) 1Hz

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CAPACITANCE
Range Resoluon Accuracy Overload Protecon
20nF 1pF
±(4.0%+20) Fuse 500mA/600V
6 dia x 32mm
200nF 10pF
2µF 100pF
20µF 1nF
• Testing signal is about 400Hz 40mVrms.
DIODE AND CONTINUITY
Range Resoluon Notes Overload Protecon
Display approximate
value of forward
voltage drop for
diode
Posive DC current
is about 1mA and
reverse DC voltage is
approx 2.8V
600V AC/DC
If resistance
≤30Ω the buzzer
sounds. Display
is approximate kΩ
value
Open circuit voltage
approx 3.0V
OPERATION
Rotary Switch
Below table indicates the rotary selector switch position functions.
DC Voltage measurement
AC Voltage measurement
AC Current measurement
DC Current measurement
FCapacitance measurement
Hz Frequency measurement
Diode Test
Continuity sounder
Resistance measurement
Ω
A
A
Hold Button
Press to enter or exit data hold mode.
• The Hold mode is applicable to all measurement functions.
• Press HOLD to enter Hold mode.
• Press HOLD again to exit Hold mode.
Note: 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.

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Measuring DC Voltage
• Insert the red test lead into the V terminal and the black test lead into COM.
• Set the rotary selector to .
• Connect the test leads across the object to be measured in parallel and the value
will be displayed.
Notes:
• If the voltage to be measured is unknown, choose the maximum measuring range
and reduce it step by step until a satisfactory reading is obtained.
• Do not attempt to measure higher than 600V or the meter may be damaged and
there may be a risk of electric shock.
• Disconnect from the circuit under test when changing the range.
• If the display only shows “1”, it indicates the measured voltage is out of range. In
this case, turn the range selector to a higher range.
Measuring AC Voltage
• Insert the red test lead into the V terminal and the black test lead into COM.
• Set the rotary selector to .
• Connect the test leads across the object to be measured in parallel and the value
will be displayed.
Notes:
• If the voltage to be measured is unknown, choose the maximum measuring range
and reduce it step by step until a satisfactory reading is obtained.
• Do not attempt to measure higher than 600V or the meter may be damaged and
there may be a risk of electric shock.
• Disconnect from the circuit under test when changing the range.
• If the display only shows “1”, it indicates the measured voltage is out of range. In
this case, turn the range selector to a higher range.
Measuring DC Current
• Insert the red test lead into the mA terminal and the black test lead into COM.
• If the current is between 200mA and 10A insert the red test lead into the 10A
terminal.
• Set the rotary selector to A.
• Connect the test leads across the object to be measured in series and the value
will be displayed.
Measuring AC Current
• Insert the red test lead into the mA terminal and the black test lead into COM.
• If the current is between 200mA and 10A insert the red test lead into the 10A
terminal.
• Set the rotary selector to A.
• Connect the test leads across the object to be measured in series and the value
will be displayed.
Notes
• 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.

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Measuring Resistance
• Insert the red test lead into the Ω terminal and the black test lead into the COM
terminal.
• Set the rotary switch to Ω resistance measurement mode.
• Connect the test leads across with the object being measured. The measured
value shows on the display.
• For high resistance measurement >1MΩ, it is normal for it to take several seconds
to obtain a stable reading.
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.
To avoid harm to yourself, do not input higher than DC 60V or AC 30V voltages.
Notes
The display will show “1” if the tested resistance is greater 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.
Capacitance measurement
• Set the rotary switch to F to select capacitance measurement.
• Insert the tested capacitor directly into the capacitance jacks or use test leads.
• Inserting the capacitor directly is more stable and suitable for small value of
capacitance testing.
• “1” is displayed if the tested capacitor is shorted or exceeds the maximum range.
• For high capacitance measurement, it is normal for it to take several seconds to
obtain a stable reading.
• When capacitance testing has been completed, disconnect the connection
between the testing leads and the item under test, and remove the testing leads
away from the input terminals of the Meter.
Warning
To avoid damages to the Meter discharge all the high-voltage capacitors before
measuring.
Testing Diodes and Continuity
• Insert the red test lead into the terminal and the black test lead into the COM
terminal.
• Set the rotary switch to to select diode and/or continuity test mode.
• For forward voltage drop readings on any semiconductor component place the red
test lead on the anode and the black test lead onto the cathode.
• The measured value shows on the display, or if measuring continuity and the
resistance is below 30Ω the internal buzzer will sound.
• When testing has been completed, disconnect the connection between the testing
leads and the item under test, and remove the test leads from the input terminals
of the Meter.
Note: A good diode should produce a forward voltage drop of 0.5V to 0.8V.

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SPECIFICATIONS
Function Range/description
Operating Temperature 0o~40oC (32oF~104oF)
Storage Temperature -10oC~50oC (14oF~122oF)
Battery Type 9V NEDA 1604 or 6F22 or 006P
Polarity Auto
AC/DC Voltage 0 to 600V
AC/DC Current 0 to 10A (5~10A for ≤10 seconds, interval ≥15 minutes)
Dimensions (H x W x L) 186 x 91 x 39mm
Weight 300g incl battery
BATTERY REPLACEMENT
Warning: Only replace the battery after the test leads
are removed and the power is turned off.
To replace the battery,
• Remove the screw from the battery cover and
separate the battery cover from the case bottom.
• Remove the battery from the battery compartment.
• Replace the battery with a new 9V battery
(NEDA1604, 6F22 or 006P)
• Ret the battery cover to the case bottom, and
reinstall the screw.
• Clean the meter with a clean, soft cloth.
• Do not use any chemicals, abrasives or solvents that could damage the meter.
CLEANING
Frequency measurement
• Insert the red test lead into the Hz terminal and the black test lead into the COM
terminal.
• Set the rotary switch to 20kHz frequency measurement
• Connect the test leads across the object being measured and the value shows on
the display.
• 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.
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