Tenma 72-3575 User manual

1
Voltage & Continuity Tester
Models: 72-3570,
72-3575 & 72-3580

2
CONTENTS
Page Number Details
3 Important Safety Information
3 Features
4 Product Overview
4 LCD
5 Voltage Measurement
6Single Test Pen Testing
6Detection Without Batteries (72-3570/72-3575)
6Continuity Test
7Rotation Test
7RCD Test
8 Silent Mode Selection
8 Torch Function
8 Backlight Function (72-3580)
8 Replacing the Batteries
9Technical Specication
10 Special Functions
10 LCD Display & Parameter Description
10 Function & Parameter Description

3
IMPORTANT SAFETY INFORMATION
Please read these instructions carefully before use and retain for future
reference.
• When using electrical appliances basic safety precautions should always be
followed.
• Do not use the meter in environments exposed to explosive gas, vapour or dust, in
direct sunlight or high radiation.
•There are no user serviceable parts in this product. Refer all servicing to qualied
personnel.
• The voltage detector is designed to be used by skilled persons and in accordance
with safe methods of work.
• The different indicating signals of the voltage detector (including the ELV limit
indication) are not to be used for measuring purposes.
• Never use the equipment while the voltage is beyond the range (referring to
technical specication parameters) and above 800V.
•To ensure normal operation of the tester, measure a known voltage value rst.
•When using the tester always keep your ngers behind the nger safety guards.
• Do not use the tester if there is a functional failure or no functional indication.
• Never test in wet conditions.
• Display functions will only work when the temperature is between -15°C and
+45°C and relative humidity is <85%.
• Ensure the batteries (not included) are inserted correctly, observing the plus and
minus marks on both the batteries and the compartment.
• Fit a full set of batteries at one time.
• 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.
FEATURES
• LED indication (72-3570 & 72-3575).
• LCD voltage and frequency display (72-3575 & 72-3580).
• AC/DC measured up to 690V.
• Detects a live wire by single test pen measurement.
• Continuity measurement.
• Indicates the phase relationships among three-phase AC.
• Silent mode.
• Detection without batteries (72-3570 & 72-2375).
• Torch and backlight.
• Self-inspection function.
• Low battery indication and measured voltage over-range indication.
• RCD test.
• Automatic standby.

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1. Test pen L1 7. Continuity indication 13. Hold mode/backlight
2. Test pen L2 8. Polar indication 14. Torch
3. Voltage indication (LED) 9. Rotary phase indication 15. Test pen cap
4. LCD 10. RCD indication (LED) 16. Battery cover
5. High voltage indication 11. RCD test button
6. AC indication 12. Torch/self-inspection
button
LCD
1. Silent mode
2. HOLD mode
3. Low battery
4. Voltage measurement
5. Frequency measurement
6. DC Voltage measurement
7. AC voltage measurement
8. Voltage
9. High voltage
10. Continuity
11. RCD
12. Rotary phase
PRODUCT OVERVIEW
72-3570 72-3575 72-3580
72-3570 72-3575 72-3580

5
VOLTAGE MEASUREMENT
• The voltage range of the tester is composed of a line of LEDs, including 6V (72-
3580), 12V, 24V, 50V, 120V, 230V, 400V and 690V.
• LEDs will light sequentially with increased voltage as will the LED polarity
indication, the on/off LED, the RCD LED, the rotary phase LED and the high
voltage LED.
• Complete a self-check of the tester before use.
• After pressing the “torch” button, the tester performs
AC/DC full range detection, indicated by a ashing LED
or a blinking LCD, depending on your model.
• To exit self-check, press the “torch” button.
• Connect the two test pens to the conductor to be
measured, select a known voltage to check accuracy
(see right).
• The tester cannot measure AC and DC voltage less than 5V and provides no
accurate indications when the measured voltage is 5V AC/DC.
• The illuminating continuity light, AC light or high voltage symbol (72-3580) and
buzzer are normal.
• The tester will provide LED indication (72-3570), LED & LCD indication (72-3575)
or LCD indication (72-3580) while measuring AC or DC voltage.
• The high voltage LED illuminates and the buzzer beeps when the measured
voltage is below the extra low voltage (ELV) threshold.
• If the measured voltage continues to increase and exceeds the input protection
voltage (750VAC/DC) of the tester, the 12V~690V LED will keep ashing (72-3570
& 72-3575) or the LCD will display “OL” (72-3575 & 72-3580), while the buzzer will
sound.
• When measuring DC voltage the meter will indicate the polarity of the voltage on
either the screen or by the LED lighting up, depending on the model.
• L2 is the positive probe and L1 is the negative probe.
• If L2 is connected to the positive terminal the meter will display a positive voltage.
• This information will allow you to determine the polarity of the poles if they are
unknown.
• For measuring AC voltage, the probes may be connected to either terminal.
• The AC LED will be illuminated or the LCD will display “VAC”, while the LED
indicates the corresponding voltage value or the LCD displays the corresponding
voltage value.

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SINGLE TEST PEN TESTING
• For single test pen testing, hold L2 and connect L2 to an unknown conductor.
• If the voltage of the conductor under test is higher than 100V AC, the LED (72-
3570/72-3575) or high-voltage symbol will illuminate and the meter will buzz.
• To determine if a conductor is live, with a single pen, contact the L2 probe tip with
the conductor under test.
• If the AC light (72-3570/72-3575) illuminates, or the “ ” symbol (72-3580) is
displayed on the LCD, it means that the wire measured is a live wire.
•To determine if the socket is electried, insert L2 into the terminal. If the AC light
or “ ” symbol is displayed along with continuous beeping, it means the socket is
live.
Notes:
• Single test pen testing can only determine whether or not a conductor is live. It
cannot indicate the voltage level.
• In the presence of adverse environmental factors such as temperature, humidity,
magnetic eld, static electricity and others, the single test pen will show an
unstable reading.
• When the measured conductor is >200VAC, the buzzer will remain silent, while the
AC LED will illuminate and a low voltage reading will be displayed.
• The LCD may display a reading (72-3575/72-3580), but the voltage value should
not be considered as the actual measured value as it is simply indicating the
conductor is electried.
DETECTION WITHOUT BATTERIES (72-3570/72-3575 only)
• The tester may perform basic measurements with no battery power.
• Connect the two test pens to the circuit under test. If the circuit has a voltage
≥50VAC/120VDC the high voltage LED will illuminate, indicating a dangerous
voltage.
• The LED brightness will be proportional to the voltage measured.
CONTINUITY TEST
•To conrm if the conductor to be measured has continuity, the meter can test for
this.
• Connect the two test pens to both ends of the object to be measured; if the
resistance is 0~100kΩ, the continuity LED (72-3570/72-3575) will illuminate or
the continuity symbol (72-3580) will display on the LCD and the buzzer will sound
continuously.
•If the resistance is >150kΩ, the continuity LED (72-3570/72-3575) will not
illuminate or the continuity symbol (72-3580) will not display and the buzzer will not
sound.
• Prior to any test, be sure the object to be measured is not live.

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ROTATION TEST
• Three-phase voltage test range: 57V~400V (50Hz~60Hz).
• Connect the L2 test pen to any phase and the L1 test pen to any of the remaining
phases. The L or R LED will illuminate.
• Once the second test pen is connected to a second phase, L or R will illuminate
based on the phase relationship.
• The L or R LED will illuminate
conversely when the position of
the two test pens are exchanged.
• An LED will indicate the
corresponding voltage or
the LCD will display the
corresponding voltage value.
• The indicated or displayed voltage should be the phase voltage against earth.
Notes:
• For measuring the three-phase AC system, as the tester only has two test pens,
it is required to form the reference terminal by holding the tester handle with your
ngers, therefore it would not accurately indicate the phase sequence of the three-
phase system if you were wearing insulating gloves.
• It is necessary to ensure the earth terminal of the three-phase system is in contact
with the human body while measuring a three-phase power system lower than
100V.
RCD TEST
• For an RCD trip test, connect the two test pens to the L and PE terminals of the
230V AC system under normal voltage measurement mode and press the yellow
RCD key on the two test pens.
• The RCD system should trip and the LED indicating RCD (72-3570/72-3575) or
the RCD symbol (72-3580) will illuminate if the circuit then generates AC current
higher than 30mA.
• At 230V, testing time should be <10s.
• The meter cannot conduct continuous measurement. After one test wait 60
seconds before the next measurement.
Notes:
• In the case of no measurements or tests, it is normal to have continuously
illuminated LEDs and a continuously sounding buzzer after simultaneously
pressing RCD keys on two test pens.
• To avoid a malfunction, do not press the two RCD buttons under non-RCD testing
mode.

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SILENT MODE SELECTION
• You can enable silent mode while the tester is in standby mode.
• After holding the torch button the tester will beep and the LCD will display the
“mute” symbol (72-3575/72-3580) when it is in silent mode.
• In silent mode all functions are the same as those in normal mode with the
exception of the silent buzzer.
• To disable silent mode, hold the torch button and after it beeps, the “mute” symbol
will disappear from the LCD indicating that silent mode has been deactivated.
TORCH FUNCTION
• Press the torch button to switch on the lamp on the top of the tester.
• To turn the lamp off, simply press the torch button again.
BACKLIGHT FUNCTION (72-3580)
• The backlight can be turned on by pressing and holding the HOLD button for one
second.
• Similarly, to turn off the backlight press and hold the HOLD button again for around
one second.
• If the tester enters standby mode while the backlight is on, the light will remain
illuminated when the tester is turned back on.
• The backlight cannot be turned off unless holding HOLD for about one second.
REPLACING THE BATTERIES
A continuously ashing negative LED (72-3570) or a low-voltage symbol on the LCD
(72-3575/72-3580) during use of the tester, indicates low battery.
Once it is indicated that the batteries are low, replace them immediately, following the
below instructions:
• Stop measurement and disconnect the two test pens from the object being
measured.
• Using a screwdriver, remove the screws securing the battery cover.
• Remove the battery cover.
• Remove the batteries to be replaced.
• Install the new batteries according to the battery symbol and direction indicated on
the panel.
• Put the battery cover back in position and return the screws using a screwdriver.

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Function Range 72-3570 72-3575 72-3580
LED segment (AC/
DC)
LED (AC/DC)
Voltage indication
(V)
6V 5V ± 1V 5V ± 1V
12V 8V ± 2V 8V ± 1V 8V ± 1V
24V 18V ± 2V 18V ± 2V 18V ± 2V
50V 38V ± 4V 38V ± 4V 38V ± 4V
120V 94V ± 8V 94V ± 8V 94V ± 8V
230V 180V ± 14V 180V ± 14V 180V ± 14V
400V 325V ± 15V 325V ± 15V 325V ± 15V
690V 562V ± 24V 562V ± 24V 562V ± 24V
Phase rotation
test (three-phase
voltage)
Voltage range:
57V~400V
Frequency:
50Hz~60Hz

Single test pen (L2)
measurement
Voltage range:
100V~690V
Frequency:
50Hz~400Hz

On-off test
Resistance range:
0~100kΩ
Buzzing & LED
illumination

RCD test
Voltage range:
230V
Frequency:
50Hz~400Hz

Polarity
measurement
Positive &
negative pole 
Self-check
All LEDs
illuminated or
LCD full display

Detection without
battery
Range:
50VAC~690VAC
120VDC~690VDC

TECHNICAL SPECIFICATION

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SPECIAL FUNCTIONS
72-3570 72-3575 72-3580
Waterproof (IP65) 
Auto range (Full range) 
Illumination (Full range) 
Low battery indication
(About 2.4V) 
Over range indicaton
(About 755V)  
Auto standby
(Standby current <10µA) 
Silent mode (Full range) 
Backlight (Full range) 
LCD display (voltage) 6V~690V  
LCD display (frequency)
40Hz~400Hz ± (3% + 5) ± (3% + 5)
LCD DISPLAY & PARAMETER DESCRIPTION
Range 6V 12V/24V 50V 120V 230V/400V/690V
72-3575 ± (1.5% + 1) ± (1.5% + 2) ± (1.5% + 3) ± (1.5% + 4) ± (1.5% + 5)
72-3580 ± (1.5% + 1) ± (1.5% + 2) ± (1.5% + 3) ± (1.5% + 4) ± (1.5% + 5)
FUNCTION & PARAMETER DESCRIPTION
LED voltage range 12V~690VAC/DC
LED voltage indication point 12V, 24V, 50V, 120V, 230V, 400V, 690V
LCD voltage range 6V~690V AC/DC (72-3575/72-3580),
resolution:1V, voltage error: ± (1.5% + 1~5 digits)
Frequency measurement range 40Hz~400Hz, resolution: 1Hz, error: ± (3% + 5
digits)
Voltage measurement Auto
Buzzing & Silent mode Optional
Polarity indication Auto
Range selection Auto
Response time LED <0.1s / LCD <1s
Peak current of test circuit 1s < 3.5mA (AC/DC)
Test time 30 seconds

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Recovery time 240 seconds
RCD test range 230V (50Hz~400Hz), Current: AC30mA~40mA,
Test time: <10s, Recover time: 60s
Single-test pen test Voltage range: 100V~690V, Frequency range:
50Hz~400Hz (for reference only)
Over voltage protection 750VAC/DC
On-off test 0kΩ~100kΩ, Accuracy: Rn + 50%
Rotation test (three-phase AC) Voltage range: 57V~400V, Frequency range:
50Hz~60Hz
Simple test (without batteries) Voltage range: 50VAC~690VAC,
120VDC~690VDC (72-3570-72-3575)
Working temperature range -15°C~+45°C
Storage temperature range -20°C~+60°C
Working humidity range ≤85% RH
Over voltage protection class CAT III 690V, CAT IV 600V
Pollution class 2
Safety rules IP65 EN61010-1, EN61243-3:2010
Weight (inclusive of batteries) 272g (72-3570/72-3575), 295g (72-3580)
Dimensions 272 x 85 x 31mm
Batteries IEC LR03 (AAA) x 2 (not included)

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INFORMATION ON WASTE DISPOSAL FOR CONSUMERS OF
ELECTRICAL & ELECTRONIC EQUIPMENT.
When this product has reached the end of its life it must be treated as Waste Electrical
& Electronic Equipment (WEEE). Any WEEE marked products must not be mixed with
general household waste, but kept separate for the treatment, recovery and recycling of
the materials used. Contact your local authority for details of recycling schemes in your
area.
Made in China. www.premierfarnell.com
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