Mercury MTN02 User manual

Item ref: 600.107UK
MTN02
Digital Network Multimeter
User Manual

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Please read this manual thoroughly and
ensure all contents are fully understood
before using the apparatus.
Warning
To avoid possible electric shock or personal injury, and to avoid possible
damage to the tester or to the equipment under test, adhere to these
following rules:
•Before using the tester inspect the case. Do not use the tester 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.
•Do not apply more than the rated voltage, as marked on the tester,
between the terminals or between any terminal and grounding.
•The rotary switch should be in the right position and no changeover of
range shall be made while measurement is conducted to prevent
damage.
•When the tester is working at an effective voltage over 60V in DC or
30Vrms 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 tester in an environment of high temperature,
humidity, explosive, flammable, damp or of a strong magnetic field.
The performance of the tester may deteriorate after being exposed to
any of these elements.
•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.F

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•Replace the battery as soon as the battery indicator appears. With a
low battery, the meter may produce false readings that can lead to
electric shock and personal injury.
•Remove the connection between the testing leads and the circuit being
tested and turn the meter power off before opening the meter case.
•The internal circuit of the meter shall not be altered at will to avoid
damage of the meter and any accident.
•A soft cloth and mild detergent should be used to clean the surface of
the tester on a regular basis. No abrasive and solvent should be used
to prevent the surface of the tester from corrosion or damage.
•The tester is suitable for indoor use only.
•Turn the tester power off when it is not in use and take out the battery
when not using for a long time. Check the battery regularly; replace the
battery immediately if any signs of leaking appear. Battery acid will
damage the tester.
General Specifications
Max display: LCD (1999 count) 1.25 inch
Polarity: Automatic, indicated minus, assumed plus
Measure method: double integral A/D switch implement
Sampling speed: 2 times per second
Over-load indication: “1” is displayed
Operating Environment: 0ºC-40ºC, at <75%RH
Storage Environment: -10ºC-50ºC, at <85%RH
Power: 9Vdc (1 x PP3 battery supplied)
Low battery indication: “ ”
Dimensions: 190 x 85 x 35mm
Weight: 322g (including battery)

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Overview

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Technical Specifications
Accuracies are guaranteed for 1 year, 23ºC ± 5ºC, less than 70% RH.
DC Voltage
RANGE
RESOLUTION
ACCURACY
200mV
0.1mV
±(0.8% of rdg + 5D)
2V
1mV
20V
10mV
±(0.5% of rdg + 2D)
200V
100mV
600V
1V
±(1.0% of rdg + 5D)
Input Impedance: 10MΩ
Overload Protection: 600V DC/AC rms
Max. Input voltage: 600V DC
14) Cable test remote unit

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AC Voltage
RANGE
RESOLUTION
ACCURACY
2V
1mV
20V
10mV
±(1.2% of rdg + 3D)
200V
100mv
600V
1V
±(1.2% of rdg + 8D)
Input Impedance: 10MΩ
Frequency Range: 40Hz ~ 400Hz
Overload Protection: 600V DC/AC rms
Response: Average, calibrated in rms of sine wave
Max. Input voltage: 600V AC rms
DC Current
RANGE
RESOLUTION
ACCURACY
20mA
10uA
±(0.8% of rdg + 5D)
200mA
100uA
10A
10mA
±(1.5% of rdg + 3D)
Overload Protection:
20mA and 200mA ranges: F0.5A/250V fuse
10A ranges: unfused
Max. Input Current:
“mA”jack: 200mA
“10A”jack: 10A (measurements>5A duration<10 secs interval>15 mins)
Voltage Drop: 200mV
AC Current
RANGE
RESOLUTION
ACCURACY
200mA
100uA
±(1.0% of rdg + 5D)
10A
10mA
±(1.5% of rdg + 7D)

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Overload Protection:
200mA ranges: F0.5A/250V fuse
10A ranges: unfused
Max Input Current:
“mA”jack: 200mA
“10A”jack: 10A (measurements>5A duration<10 secs interval>15 mins)
Voltage Drop: 200mV
Frequency Range: 40Hz ~ 400Hz
Response: Average, calibrated in rms of sine wave
Resistance
RANGE
RESOLUTION
ACCURACY
200Ω
0.1Ω
±(1.5% of rdg + 3D)
2KΩ
1Ω
±(1.5% of rdg + 3D)
20kΩ
10Ω
200kΩ
100Ω
2MΩ
1kΩ
±(1.5% of rdg + 3D)
20MΩ
10kΩ
±(1.5% of rdg + 3D)
Open Circuit Voltage: about 0.25V
Overload Protection: 250V DC/AC rms
Diode and Continuity
RANGE
INTRODUCTION
REMARK
The approx. forward
voltage drop will be
displayed
Open circuit
Voltage:
about 1.5V
The built-in buzzer
will sound if the
resistance is less
than about 30+20Ω
Open circuit
Voltage:
about 1.5V
Over-load protect: 250V DC/AC rms

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OPERATING INSTRUCTIONS
VOLTAGE MEASUREMENT
1. Connect red test lead to “VΩ” jack, black lead to “COM” jack.
2. Set RANGE switch to desired VOLTAGE position, if the voltage
to be measured is not known beforehand, set switch to the
highest range and reduce it until satisfactory reading is
obtained.
3. Connect test leads to device or circuit being measured.
4. Turn on power of the device or circuit being measured voltage
value will appear on Digital Display along with the voltage
polarity.
Please note:
•In small range, the meter may display an unstable reading
when the test leads have not been connected to the load to be
measured. It is normal and will not affect the measurements.
•When the meter shows the over range symbol “1”, a higher
range must be selected.
•To avoid damage to the meter, don’t measure a voltage which
exceeds 600Vdc (for DC voltage measurement) or 600Vac (for
AC voltage measurement).
CURRENT MEASUREMENT
1. For reading less than 200mA connect red lead to “mA” and
black lead to “COM” (for measurements between 200mA and
10A, connect red lead to “10A”) ensure jacks are fully
depressed.

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2. Set the range switch to desired AC or DC position. If the
current magnitude to be measured is not known beforehand,
set the ranges switch to the highest range position and then
reduce it range by range until satisfactory resolution is
obtained.
3. Open the circuit to be measured and connect test leads in
SERIES with the load in with current is to measure.
4. Current reading will be displayed on LCD, for DC current
measurement, the polarity of the red probe will also be
indicated.
Please note:
When the display shows the over range symbol “1”, a higher
range must be selected.
RESISTANCE MEASUREMENT
1. Connect red lead to “VΩ”, black lead to “COM”.
2. Set the range switch to desired Ω range.
3. If the resistance being measured is connected to a circuit, turn
off power and discharge all capacitors before measurement.
4. Connect test leads to circuit being measured.
5. Read resistance value on Digital Display.
Please note:
•For resistance measurements >1MΩ, the meter may take
a few seconds to stabilize reading. This is normal for
high-resistance measurement.
•When the input is not connected, i.e. at open circuit, the
symbol “1” will be displayed as an over range indicator.
•Before measuring in-circuit resistance ensure that the
circuit under test has all power removed and all

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capacitors are fully discharged.
CONTINUITY TEST
1. Connect the BLACK test lead to the “COM” jack and the RED
to the “VΩ” jack (Note: The polarity of the red test lead is
positive “+”).
2. Set the range switch to range
3. Connect the test leads across the load to be measured.
4. If the circuit resistance is lower than about 30±20Ω, the built-
in buzzer will sound.
DIODE MEASUREMENT
1. Connect red lead to “VΩmA”, black lead to “COM”.
2. Set RANGE switch to “ ” position.
3. Connect the red test lead to the anode of the diode to be
measured and black test lead to cathode.
4. The meter will show the approximate forward voltage
of the diode. If the connections are reversed, “1” will be
shown on the display.
CABLE TESTER
This network cable tester can be used to scan and judge the
continuation property of double-twisted cable. Both automated and
manual operations are available.
Main performance:
1. Test unshielded or shielded network cable, telephone lines and
USB cables.

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2. Check continuity and configuration of lead with unshielded and
shielded modular plugs.
3. Test the following faults: open circuits, shorts, miswire and
reversals.
4. Check the shield layer (SHIELD).
5. The main and remote units can be operated by a single
person.
Fault Descriptions:
OPEN: If one or more wire is open circuit, the LED’s on the main
and remote units will go out.
SHORT: When the network cable has a short circuit, the LED’s of
main unit will light in turns and the LED’s of the remote unit will
have two or more lights out.
MISWIRE & REVERSAL: The LED’s of the main unit will
illuminate in sequence, but the LED’s of the remote unit will not.
Operation:
1. Automatic mode:
a. Connect the two terminals of the cable to the main and
remote units.
b. Turn the switch to AUTO mode. If everything is
wired correctly, the LED’s on both units will illuminate in
sequence.
2. Manual mode:
a. Connect the two terminals of the cable to the main and
remote units
b. Turn the switch to MANUAL mode and press the
“TEST” button. Each press tests each cable individually in
sequence.

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c. Using Manual mode holds the test result making it
easier to locate the error position.
Note: When testing RJ11 cables the LED lights displayed on the
main and remote units are opposite.
Function Descriptions:
The below table indicates a correctly wired mode for RJ45, RJ12,
RJ11 and USB cable applications.
BATTERY AND FUSE REPLACEMENT
1) Battery and fuse replacement should only be done after the test
leads have been disconnected and power is off.
2) Loosen the 2 screws under the prop stand with a suitable
screwdriver and remove the case cover.
3) The meter is powered by a single 9V PP3 battery. Snap the
battery connector leads to the terminals of a new battery and
reinsert the battery into the housing. Ensure the battery leads
will not be pinched when you replace the cover.
4) The meter is protected by fuse:
A) mA: F0.5A/250V Fast, Breaking capacity is 10KA,
dimensions are 20 x 5mmØ.
Replace the case cover and reinstall the screws. Never operate the
meter unless the case cover is fully closed and secured.

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ACCESSORIES
•Remote cable test unit
•Set of test leads (red and black)
•9V PP3 battery
•Instruction manual
EN61010–1:2010
This product is classed as Electrical or Electronic equipment
and should not be disposed with other household or commercial waste
at the end of its useful life. The goods must be disposed
of according to your local council guidelines.
Errors and omissions excepted.
Copyright© 2021 AVSL Group Ltd, Unit 2 Bridgewater Park,
Taylor Road, Trafford Park, Manchester. M41 7JQ.
AVSL (Europe) Ltd, Unit 3D North Point House,
North Point Bus. Park, New Mallow Road, Cork, Ireland.