MARTINDALE TEK 402 User manual

TEK 402/404 CONTINUITY TESTER
MARTINDALE
ELECTRIC
Trusted by professionals
INSTRUCTIONS
™
Storage Conditions
The TEK402/TEK404 should be kept in warm dry conditions away from
direct sources of heat or sunlight, with the battery removed and in such a
manner as to preserve the working life of the TEK402/TEK404. It is strongly
advised that the unit is not kept in a tool box where other tools may
damage it.
Warranty
Faults in manufacture and materials are fully guaranteed for 24 months
from date of invoice and will be rectified by us free of charge, provided the
unit has not been tampered with, and is returned to us unopened. Damage
due to dropping, abuse or misuse is not covered by the guarantee. Nothing
in these instructions reduces your statutory rights.
LIT400 Rev 4.
Martindale Electric Company Limited
Metrohm House, Penfold Trading Estate, Imperial Way, Watford, WD24 4YY, UK.
Tel: [phone] Fax: [phone]
E-mail: [email protected]
Website: www.martindale-electric.co.uk
Martindale Electric Company Ltd.
Registered in England No. 3387451.

SAFETY INFORMATION: Always read before proceeding.
Warning
These instructions contain both information and warnings that are
necessary for the safe operation and maintenance of the
TEK402/TEK404. It is recommended that you read the instructions
carefully and ensure that the contents are fully understood. Failure to
understand the instructions and to comply with the warnings and
instructions contained herein can result in serious injury, damage or
even death.
In order to avoid the danger of electrical shock, it is important that
proper safety measures are taken when working with voltages
exceeding 30 V AC rms, 42 V AC peak or 60 V DC.
The TEK402/TEK404 must only be used under the conditions and for
the purposes for which it has been constructed. Particular attention
should be paid to the safety instructions, the technical specifications
and the use of the TEK402/TEK404 in dry surroundings.
Always check the TEK402/TEK404 is in good working order before
use and that there are no signs of damage to the unit. Do not use if
damaged.
SYMBOLS:
AC (Alternating Current)
Equipment complies with relevant
EU Directives
MAINTENANCE
Battery Replacement
Disconnect the TEK404 from any external circuit or components. Remove
the battery cover of the TEK402/TEK404 by unscrewing the battery cover
retaining screw. The cover will now lift off. Fit a new 9V, MN1604/PP3
alkaline battery, observing correct polarity. Replace the battery cover and
secure with the battery cover retaining screw. Check the function of the unit
by shorting the leads together.
Fuse Replacement (TEK404 only)
Disconnect the TEK404 from any external circuits or components. Unscrew
the 4 nylon screws from the rear casing and remove the rear casing.
Remove the fuse from its holder and replace it with a 50mA, 250V, Fast,
20mm fuse, 35A Breaking Capacity. Replace the rear cover and the 4
nylon screws. Ensure that internal wiring is not pinched as screws are
tightened. Do not overtighten screws. Check the function of the unit by
shorting the leads together.
Cleaning
The TEK402/TEK404 may be cleaned using a soft damp cloth. Do not use
abrasive cleaners or solvents. Allow to dry completely before using.
Repair & Service
There are no user serviceable parts in this unit other than the fuse (TEK404
only). Return to Martindale Electric Company Ltd if faulty. Our service
department will quote to repair any faults that occur outside the warranty
period.
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CONTENTS
Introduction 4
Description 4
Unpacking And Inspection 4
Battery Installation 4
Technical Specification 5
Operation 5
Precautions 5
Using the TEK402/TEK404 6
Over-Voltage Protection (TEK404 only) 6
Maintenance 7
Battery Replacement 7
Fuse Replacement (TEK404 only) 7
Cleaning 7
Repair & Service 7
Storage Conditions 8
Warranty 8
36
Using the TEK402/TEK404
Connect the leads supplied to the 4mm sockets of the TEK402/TEK404.
Verify the TEK402/TEK404 is functioning correctly by shorting together the
leads. An audible tone will be emitted and the red LED on the TEK404 will
illuminate.
After making any possible checks to verify the circuit/component you are
going to check for continuity is not live, connect the TEK402/TEK404 leads
to it.
If there is continuity of less than 10 KΩan audible tone will be emitted. The
red LED on the TEK404 will illuminate if the continuity is less than
20 KΩ.
Note: - The sound level emitted and the LED brightness will depend upon
the continuity of the circuit/component being tested.
Over-Voltage Protection (TEK404 only)
If the TEK404 has been placed across a live circuit the internal circuitry will
intentionally draw current to blow the internal fuse and protect other
components of the TEK404. To replace the fuse, refer to section on
maintenance (Fuse Replacement).

INTRODUCTION
Description
The TEK402 and TEK404 are battery powered continuity testers that give
an audible indication of the continuity of the circuit/component under test.
The TEK404 also gives visual indication of continuity and has over-voltage
protection for instances where the TEK404 may accidentally be connected
to a live circuit.
Unpacking and Inspection
Before unpacking the TEK402/TEK404, examine the shipping carton for
any sign of damage. Unpack and inspect the TEK402/TEK404 and leads
for any damage. If there is any damage then consult your distributor
immediately.
Battery Installation
Refer to section on maintenance (Battery Replacement).
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TECHNICAL SPECIFICATION
TEK402 & TEK404
Probe voltage: 9 V.
Test current: 5 mA.
Continuity range (audible): Up to approx 10 KΩ.
Audible output level: 85dB minimum at 30 cm with zero
continuity resistance.
Audible output frequency: 2.8 KHz.
Power supply: 9V, MN1604/PP3 alkaline battery.
Dimensions: 150 x 64 x 30mm.
Weight: Approx 185g (including leads, without battery).
TEK404 only
Continuity range (visual): Up to approx 20 KΩ.
Fuse rating: 50mA, 250V, Fast Glass Fuse, 20x5mm.
Over-voltage protection: Up to 250 V AC/DC.
OPERATION
Precautions
Warning Before use check the TEK402/TEK404 for cracks or any other
damage, and make sure the units are free from dust, grease
and moisture.
Warning Do not connect to a live circuit.
Warning Do not use if the battery cover is not fitted.
Caution Avoid severe mechanical shock or vibration and extreme
temperature.
Caution Remove the batteries when not in use for an extended period to
avoid corrosion from leaking batteries.