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INSTRUCTIONS FOR:

ELECTRONIC BATTERY TESTER 3 FUNCTION

MODEL: 

BT91/4.V2

Thank you for purchasing a Sealey product. Manufactured to a high standard this product will, if used according to these instructions and properly maintained,

give you years of trouble free performance.

1. SAFETY INSTRUCTIONS

IMPORTANT:

PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS AND CAUTIONS. USE THE PRODUCT

CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR PERSONAL INJURY AND WILL

INVALIDATE THE WARRANTY. PLEASE KEEP INSTRUCTIONS SAFE FOR FUTURE USE.

DANGER! BE AWARE, LEAD-ACID BATTERIES GENERATE EXPLOSIVE GASES DURING NORMAL BATTERY OPERATION.

FOR THIS REASON IT IS VERY IMPORTANT TO READ AND FOLLOW THESE INSTRUCTIONS CAREFULLY EACH TIME

YOU USE THE BATTERY TESTER. 

Follow these instructions and those published by the battery and vehicle manufacturers and the maker of any equipment you intend

to use in the vicinity of the battery. Remember to review warning marks on all products and on engines.

Steel case with carry strap. Three control system electronic analyser with large, easy to read volt meter and LED read-outs for battery and

alternator condition. Supplied with crocodile clip, probe and operating instructions. Optional trolley available - See Model No. BT91/6.

3. OPERATION

2. INTRODUCTION

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1.1.

PERSONAL PRECAUTIONS

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Ensure that there is another person within hearing of your voice and close enough to come to your aid 

should a problem arise when working near a lead-acid battery.

3

Wear safety eye protection and protective clothing. Avoid touching eyes while working near battery.

3

Have fresh water and soap nearby in case battery acid contacts skin, clothing or eyes.

3

Wash immediately with soap and water if battery acid contacts skin or clothing. If acid enters eye, flush eye immediately with cool, clean 

running water for at least 15 minutes and seek immediate medical attention.

3

Remove personal metallic items such as rings, bracelets, necklaces and watches. A lead-acid battery can produce a short-circuit current 

which is high enough to weld a ring or the like to metal, which would cause severe burns.

3

Ensure hands, clothing (especially belts) are clear of fan blades and other moving or hot parts of engine, remove ties and contain long hair.

7

DO NOT

smoke or allow a spark or flame in the vicinity of battery or engine.

1.2. GENERAL SAFETY INSTRUCTIONS

3

Familiarise yourself with the application, limitations and potential hazards of the tester. Also refer to the vehicle manufacturer’s handbook. 

IF IN ANY DOUBT, CONSULT A QUALIFIED VEHICLE TECHNICIAN. For use on lead-acid batteries only.

3

Ensure that the tester is in good condition before use. If in any doubt do not use the unit and contact an electrician.

3

Use only recommended attachments and parts. To use unapproved items may be dangerous and will invalidate your warranty.

3

Keep tools and other items away from the engine and ensure that you can see the battery and working parts of the engine clearly.

3

Confirm that the battery to be tested is 12 volt 

and not 6 or 24 volt

before attaching clamps to battery terminals.

3

If the tester receives a sharp knock or blow it must be checked by a qualified service agent before being used.

3

If the battery terminals are corroded or dirty, clean them before attaching the clamps.

3

Keep children and unauthorised persons away from the work area.

7

DO NOT

disassemble the tester for any reason. The tester must only be checked by qualified service personnel.

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WARNING! 

To prevent the risk of sparking, short circuit and explosion

DO NOT

drop metal tools in the battery area, or allow them to touch 

the battery terminals.

7

DO NOT

cross-connect leads from tester to battery. Ensure positive (+/RED) is to positive and negative (-/BLACK) is to negative. If the 

symbols cannot be distinguished, remember that the battery negative terminal is normally the one directly connected to the vehicle bodywork.

7

DO NOT

pull the cables or clamps from the battery terminals.

7

DO NOT

use the tester outdoors, or in damp, or wet locations and 

DO NOT

use in the vicinity of flammable liquids or gases.

3

Ensure that there is effective ventilation to prevent a build-up of explosive gases and do not cover or obstruct the tester ventilation louvres.

7

DO NOT

use the tester for a task for which it is not designed.

3

When not in use, store the tester carefully in a safe, dry, childproof location.

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WARNING!

Ensure that you read, understand and apply the safety 

and operational instructions before connecting the tester to the battery. 

Only when you are sure that you understand the procedures is it

safe to proceed with testing.

3.1.

PREPARATION

3.1.1. Check battery casing for cracks or leakage and confirm that it is 12 volt.
3.1.2. Clean battery terminals.
3.1.3. Check electrolyte levels and top up with distilled water as necessary (not

sealed batteries).

Note: When connecting the tester ensure that the clamp and probe cables are 

clear of hot or moving engine parts, particularly if an alternator test is to be carried out. Ventilation slots in the tester casing should be

unobstructed and the front panel should be easily visible.

BT91/4.V2 - 1 - 111105

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