MARTINDALE TEK402 Continuity Testers Instruction Manual
- June 16, 2024
- MARTINDALE
Table of Contents
Instruction
Manual
TEK402
TEK404
CONTINUITY TESTERS
ALWAYS READ THESE INSTRUCTIONS BEFORE PROCEEDING
Thank you for buying one of our products. For safety and a full understanding
of its benefits please read this manual before use.
Technical support is available from +44 (0)1923 441717 and support
@martindale-electric.co.uk.
SAFETY INFORMATION: Always read before proceeding.
REMEMBER: SAFETY IS NO ACCIDENT
These instructions contain both information and warnings that are necessary
for the safe operation and maintenance of this product. It is recommended that
you read the instructions carefully and ensure that the contents are fully
understood. Failure to understand and to comply with the warnings and
instructions can result in serious injury, damage or even death.
Particular attention should be paid to the Warnings, Precautions and Technical
Specifications.
Please keep these instructions for future reference. Updated instructions and
product information are available at: www.martindale-
electric.co.uk
1.1 Precautions
This product has been designed with your safety in mind, but please pay
attention to the following warnings and cautions before use
Warnings
In order to avoid the danger of electrical shock, it is important that proper
safety measures are taken when working with voltages exceeding the extra low
voltage (ELV) limit of 50V AC RMS or 120V DC.
Where applicable other safety measures such as the use of protective gloves,
goggles etc. should be employed.
The continuity tester must only be used by a skilled and competent person who
is familiar with the relevant regulations, the safety risks involved and the
consequent normal safe working practices.
Before each use the continuity tester should be examined for damage, cracks,
cuts or scratches. If there is any doubt the voltage indicator should not be
used.
Make sure the unit is dry, clean, and free from dust, grease and moisture
while in use to avoid the danger from electric shock due to surface leakage.
The continuity tester must only be used to test de-energised dead circuits.
The TEK402 must NOT be connected to CAT II, CAT III or CAT IV circuits.
The TEK404 must only be used on CAT II and CAT III installations up to 600V to
earth, and within the operating temperature and humidity range specified and
is intended to be used on dead circuits only, but it has in built protection.
If the removable probe tip caps are not fitted to the probes of the test
leads, their measurement category becomes CAT II 1000V, and they must not be
used on CAT III or CAT IV installations to avoid the risk of shorting high
energy circuits and arc flash. When this unit is used in combination with test
leads, the measurement category of the combination is the lower measurement
category of either this unit or the test leads used. Likewise, if test lead
accessories such as crocodile clips are also used, the measurement category
will be the lowest measurement category in that combination.
Do not use if the battery compartment cover is not fitted.
When using test leads, always keep your fingers behind the finger guard on the
test lead probe.
If the equipment is used in a manner not specified by Martindale Electric, the
protection provided by the equipment may be impaired.
Cautions
Avoid severe mechanical shock or vibration and extreme temperature.
Remove the leads from the unit when not in use, to avoid flattening the
battery.
When using test leads avoid excessive stresses to the cable entry points at
the probe and 4mm plug connector.
To avoid possible corrosion from a leaking battery, remove the battery if
discharged, or when the unit is not in use for an extended period.
1.2 Meaning of Symbols and Markings
Caution – risk of danger & refer to instructions
Caution – risk of electric shock
Equipment protected by double or reinforced insulation (Class II)
CAT II (Measurement Category II) is applicable to test and measuring
equipment connected directly to utilization points (socket outlets and similar
points) of the lowvoltage MAINS installation.
CAT III (Measurement Category III) is applicable to test and measuring
equipment connected to the distribution part of the building’s low-voltage
MAINS installation.
CAT IV (Measurement Category IV) is applicable to test and measuring
equipment connected at the source of the building’s low-voltage MAINS
installation.
For further information on measurement categories see page 11 or visit:
martindale-electric.co.uk/installation-categories
Equipment complies with relevant EU Directives
Equipment complies with relevant UK Conformity Assessed marking
End of life disposal of this equipment should be in accordance with
relevant Directives
INTRODUCTION
2.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the unit and any
accessories for damage. If there is any damage then consult your distributor
immediately.
2.2 Description
The TEK402 and TEK404 are battery powered continuity testers that give an
audible indication of the continuity resistance of a circuit under test.
The TEK404 also includes a LED to indicate the continuity of the circuit under
test.
Both units must ONLY be applied to de-energised dead circuits.
The TEK402 has fused over-voltage protection for instances where the unit may
accidentally be connected to a live circuit.
In the event that the TEK404 is connected to a live circuit the buzzer and LED
will indicate an alarm condition.
2.3 Accessories (included)
- TL49 test leads with insulated crocodile clips (TEK402 only)
- TL47 test leads with insulated crocodile clips (TEK404 only)
- 9V battery
- Instructions
2.4 Battery Installation
On receipt the battery is inside the battery compartment but not connected.
Refer to section 4.1 (Battery Replacement) for the battery installation
instructions for the TEK402/TEK404.
OPERATION
3.1 General
To verify that the TEK402/TEK404 is functioning correctly, connect the 4mm
plugs of the test leads provided to the 4mm sockets of the TEK402/TEK404.
Short together the probe tips. A loud audible tone will be emitted, and on the
TEK404 only, a LED will be illuminated.
If the audible tone is not present, or low in amplitude, replace the
TEK402/TEK404 battery (see 4.1 Battery Replacement).
If the audible tone is not present after replacing the TEK402 battery, replace
the TEK402 fuse (see 4.2 Fuse Replacement).
3.2 Use of the TL47 and TL49 Test Leads
When crocodile clips are to be fitted, or where it may be required to plug the
probes into 4mm sockets, the probe tip covers may be removed by gently pulling
them forward until they unclip from the probe body to reveal 4mm plugs.
3.3 Continuity Testing using the TEK402
**** This unit must NOT be connected to CAT II, CAT III or CAT IV circuits.
Make all possible checks to verify that the circuit to be tested is NOT live.
Connect the 4mm plugs of the test leads provided to the 4mm sockets of the
TEK402.
Taking all necessary safety precautions connect the test lead probes to the
circuit to be tested.
The sound level will be reduced by the presence of increased continuity
resistance. The maximum sound level will be evident with the test leads
shorted. Minimum sound level will be at approximately 10kΩ. Note: The
behaviour of the buzzer will be misleading if any voltage is present on the
circuit under test.
3.4 Continuity Testing using the TEK404
** Make all possible checks to verify that the circuit to be tested is NOT
live.
Connect the 4mm plugs of the test leads provided to the 4mm sockets of the
TEK404.
Taking all necessary safety precautions connect the test lead probes to the
circuit to be tested. Insulated crocodile clips are provided for added
convenience.
The sound level and LED brightness will be reduced by the presence of
increased continuity resistance. The maximum sound level and LED brightness
will be evident with the test leads shorted. Minimum sound level and LED
brightness will be at approximately 1.7kΩ.
The buzzer and LED will cease to operate at approximately 2.2kΩ.
Note: The behaviour of the buzzer will be misleading if any voltage is
present on the circuit under test.
3.5 Fused Overvoltage Protection (TEK402 only)
If the TEK402 is inadvertently connected to a live circuit, the internal
circuitry will intentionally draw a current to blow the internal fuse, and
protect other components of the TEK402.
3.6 Alarm Function (TEK404 only)
The TEK404 incorporates an alarm function which operates if it is
inadvertently connected to a live circuit >30V DC or AC rms.
The alarm is indicated by an interrupted pulsed buzzer tone and a pulsed LED
illumination.
Note:** The TEK404 should not be used as a voltage detector.
MAINTENANCE
4.1 Battery Replacement
**** To avoid shock or injury, disconnect the TEK402/TEK404 from any external
circuits or components and remove the test leads before proceeding.
Unscrew the battery cover retaining screw and lift off the battery cover.
Fit a new 9V, PP3 alkaline battery (IEC 6LR61, NEDA 1604A), observing correct
polarity.
Replace the battery cover and secure it with the battery cover retaining
screw.
Check the unit functions by replacing the test leads and shorting them
together.
4.2 Fuse Replacement (TEK402 only)
**** To avoid shock, injury or damage, disconnect the TEK402 from any
external circuits or components and remove the test leads and battery before
proceeding.
Replace only with the fuse specified.
Unscrew the battery cover retaining screw and lift off the battery cover.
Remove the blown fuse from the metal clips, and replace it with a 50mA 250V
Ceramic Fast Acting, 20mm x 5mm fuse. Martindale Ref: FUSE50250X3 (Pack of 3).
Replace the battery cover and secure it with the battery cover retaining
screw.
Check the unit functions by replacing the test leads and shorting them
together.
4.3 Test Lead Replacement
If the test leads become damaged they should be replaced with identical test
leads as specified by Martindale Electric.
**** The replacement test leads must have the same (or better) overvoltage category rating as the TL49 (TEK402) / TL47 (TEK404) leads supplied.
4.4 Cleaning
The unit may be cleaned using a soft dry cloth. Do not use moisture,
abrasives, solvents, or detergents, which can be conductive.
4.5 Repair & Service
There are no user serviceable parts in this unit other than those that may be
described in section 4. Return to Martindale Electric if faulty. Our service
department will quote promptly to repair any fault that occurs outside the
guarantee period.
Before the unit is returned, please ensure that you have checked the unit,
battery, fuse, leads and poor connections.
4.6 Storage Conditions
The instrument should be kept in warm dry conditions away from direct sources
of heat or sunlight, and in such a manner as to preserve the working life of
the unit. It is strongly advised that the unit is not kept in a tool box where
other tools may damage it.
WARRANTY AND LIMITATION OF LIABILITY
This Martindale product is warranted to be free from defects in material and
workmanship under normal use and service. The warranty period is 2 years and
begins on the date of receipt by the end user. This warranty extends only to
the original buyer or end-user customer, and does not apply to fuses,
disposable batteries, test leads or to any product which, in Martindale’s
reasonable opinion, has been misused, altered, neglected, contaminated, or
damaged by accident or abnormal conditions of operation, handling or storage.
Martindale authorised resellers shall extend this warranty on new and unused
products to end-user customers only but have no authority to extend a greater
or different warranty on behalf of Martindale.
Martindale’s warranty obligation is limited, at Martindale’s option, to refund
of the purchase price, free of charge repair, or replacement of a defective
product which is returned to Martindale within the warranty period.
This warranty is the buyer’s sole and exclusive remedy and is in lieu of all
other warranties, expressed or implied, including but not limited to any
implied warranty of merchantability or fitness for a particularpurpose.
Martindale shall not be liable for any special, indirect, incidental or
consequential damages or losses, including loss of data, arising from any
cause or theory.
Since some jurisdictions do not allow limitation of the term of an implied
warranty, or exclusion or limitation of incidental or consequential damages,
the limitations and exclusions of this warranty may not apply to every buyer.
If any part of any provision of this warranty is held invalid or unenforceable
by a court or other decision-maker of competent jurisdiction, such holding
will not affect the validity or enforceability of any other provision or other
part of that provision.
Nothing in this statement reduces your statutory rights.
MEASUREMENT CATEGORIES
CAT Ratings
BS EN61010-1 Installation Categories(CAT ratings) define the risks from
hazardous transient impulses and potentially lethal short circuit currents on
the mains supply system based on where you are working.
Voltage Ratings
Test equipment used for measuring mains circuits will have a CAT rating to
show where it can be used. Each category also has a voltage rating to show the
maximum safe phase to earth system voltage, normally 50V, 100V, 150V, 300V,
600V or 1000V.
Stay safe – Match your test equipment safety rating to the installation
category.
CAT II: Socket outlets and similar points of the mains installation.
CAT III: The distribution part of the building’s mains installation.
CAT IV: The supply side source of the building’s mains installation.
Testers, leads and accessories all need safety ratings equivalent to, or
higher than the installation category and voltage rating for the location to
be safe.
LOW-VOLTAGE SUPPLY SOURCE
1.Tarrif Meter
2. Service fuse
3. Lighting
4. Generation Meter
5. Circuit Breakers| 6. Socket Wiring
7. Plug-in Lamps
8. Electrical Appliances
9 Socket Outlet
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Specification TEK402/TEK404 Continuity Tester
Electrical
TEK402 Mk3
Probe voltage: 9V DC approx
Test current: 5mA
Continuity range (audible): up to 10kΩ nominal
Audible output level: 85dB minimum at 30cm with leads shorted
Overvoltage protection fuse rating: 50mA, 250V, Fast Acting Ceramic Fuse, 20mm
x 5mm
TEK404 Mk3
Probe voltage: 9V DC approx. (open circuit probe voltage) 8.4V DC (loaded)
Test current: <50μA (across short circuit)
Continuity range: 0Ω to 2.2kΩ ± 10%
Audible output level: 85dB minimum at 30cm with leads shorted
LED indication: bright orange LED Buzzer and LED intensity reduce with
increasing continuity resistance.
Alarm function threshold: >30V ± 20V DC & AC rms
Environmental
Location: Indoor use only
Altitude: Up to 2000m
Temperature & Humidity (Operating): -10°C to 40°C at max 70% R.H.
(Storage): -10°C to 50°C ≤ 80% R.H.
Mains supply voltage fluctuations: ±10%
IP Rating: IP40
Pollution degree: 2
General
Power: 9V, PP3 alkaline battery (IEC 6LR61, NEDA 1604A),
Dimensions: 150(H) x 64(W) x 31(D) mm.
Weight: TEK402 Mk3 approx 264g (including leads, croc clips & battery)
TEK404 Mk2 approx 296g (including leads, croc clips & battery) Specification
TEK402/TEK404 Continuity Tester
Includes: TL49 test leads with insulated crocodile clips (TEK402 only),
TL47 test leads with insulated crocodile clips (TEK404 only), 9V battery,
instructions
Safety
TEK402 Mk3 conforms to BS EN 61010-1, max 50 V to earth (no measurement
category)
TEK404 Mk2 conforms to BS EN 61010-1 CAT III 600 V
Class II, double insulation
EMC
Conforms to BS EN 61326-1
SPECIFICATION FOR TL47 & TL49 TEST LEADS
Maximum voltage: 1000V AC/DC Maximum current: 10A continuous
Connector: 4mm banana plug with fixed shroud
Environmental
Temperature (operating & storage): 0°C to 40°C
Altitude: up to 2000m
Pollution degree 2
Safety (TL47)
Conforms to BS EN 61010-031,
Probe tip caps fitted – CAT IV 600V, CAT III 1000V, 10A
Probe tip caps removed – CAT II 1000V, 10A
Crocodile clip fitted – CAT III 600V, CAT II 1000V, 10A
Class II, double insulation
Safety (TL49)
Conforms to BS EN 61010-031,
Probe tip caps fitted – CAT III 1000V, 10A
Probe tip caps removed – CAT II 1000V, 10A
Crocodile clip fitted – Max 50 V to earth (no measurement category), 10A
Class II, double insulation
Check out what else you can get from Martindale:
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• Calibration Equipment
• Continuity Testers
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• Environmental Products
• Full Calibration & Repair Service
• Fuse Finders
• Digital Clamp Meters
• Digital Multimeters
• Labels
• Microwave Leakage Detectors| • Safe Isolation Kits
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• Thermometers & Probes
• Test Leads
• Voltage Indicators
• Specialist Metrohm Tester
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Martindale Electric Co. Ltd. Metrohm House, 12 Imperial Park, Imperial Way, Watford WD24 4PP. T: +44 (0)1923 441717 www.martindale- electric.co.uk sales@martindale- electric.co.uk
Ver. D1.0
Due to policy of continuous development, Martindale Electric reserves the
right to alter equipment specification and description outlined in this
document without prior notice. No part of this document shall be deemed to be
part of any contract for the equipment unless specifically referred to as an
inclusion within such contract. © 2023 Martindale Electric Co. Ltd. Registered
in England No. 3387451. LIT400.
References
- martindale-electric.co.uk/installation-categories
- Martindale Electric - Manufacturer of Voltage Indicators, PAT Testers & Socket Testers