Operation; Preparation; Connection; Battery Load Test - Sealey BT91/7P Instructions

3. operation

WarninG! ensure you read, understand and apply the safety and operational instructions before connecting the tester clamps to
‰
the battery. only when you are sure that you understand the procedures is it safe to proceed with the testing process.
3.1.

preparation

3.1.1. Check battery casing for cracks or leakage and confirm that it is 6 or 12 volts.
3.1.2.
clean battery terminals. if possible, check electrolyte levels and top up with distilled water as necessary.

Connection

3.2.
WarninG! Ensure vehicle, or battery, is in a well ventilated area before starting test.
‰
3.2.1. Attach positive (red) clamp to positive (+) battery terminal and negative (black) clamp to negative (-) terminal. slightly twist clamps on
terminals two or three times to ensure a good electrical contact and a firm grip. correct connection is indicated by the meter pointer (fig.1)
moving to the right, up the scale.
3.2.2. if the pointer moves to the left then the clamps should be reversed. if the pointer does not move at all there is either a bad connection or
the battery is completely dead.
3.2.3. ensure that the clamp cables are clear of hot or moving engine parts, particularly if a starter or charging test is to be carried out.
Ventilation slots in tester casing should be unobstructed, meter should be easily visible and load switch accessible.
fig.1
3.3.

battery load test

note: on the first load test, sMoke May be eMitted froM the loUVres in the tester CasinG. this is oil
bUrninG off the load Coils and is norMal.
3.3.1. Press load switch (fig.2) and hold until meter reading stabilizes, or for a maximum of 10 seconds. ( failure to release the switch after 10
seconds may result in the switch burning out and your warranty being invalidated.) note meter reading and then release load switch.
3.3.2. compare meter reading with load test chart (3.4) to determine battery condition.
notes:
a) for 12 volt batteries the green sector (fig.1.f) border is marked with nominal cranking current from 300 to 500
amps and stepped in 50 amp intervals.
record this figure and compare with battery manufacturer's quoted figure to give an indication of any deterioration.
b) Battery performance falls at low temperatures and quoted cranking amps should be reduced by 50 amps at 20°f(-7°c) and 100
amps at 0°f(-18°c).
3.4.

load test Chart

load test result
oK - green fig.1f - 12v
fig.1B - 6v
Bad or Weak - red or yellow,
but reading steady.
fig.1d/e - 12v
fig.1A/B - 6v
Bad or weak - red or yellow,
but reading falling after 10
seconds on load.

battery voltage/charge level

3.5.
if the load test result indicates a battery fault, allow battery to stabilize for a few minutes and then read the open circuit voltage - meter reading
3.5.1.
with load switch 'off'.
3.5.2. compare the reading with the Voltage/charge table below to get an estimation of the charge level.
open Circuit Voltage
12 volt/6 volt battery
≤11.7/5.8 or lower
12.0/6.0
12.2/6.1
12.4/6.2
≥12.6/6.3 or higher
© Jack sealey limited
battery Condition
Battery capacity is good. May or may not be fully charged. Check electrolyte specific
gravity to determine charge state. if not fully charged check charging system for fault
(paragraph 3.6) or electrical drain.
Battery capacity is unsatisfactory. Battery may be either: (1) defective or (2) partly
discharged. Check electrolyte specific gravity. If over 1.225 battery is defective. If under
1.225 recharge battery and retest. If cell-to-cell specific gravity varies by more than 0.025 a
cell defect may exist. If charging does not bring specific gravity to full charge level battery is
sulphated or has lost active material.
Battery may be defective. release load switch and note meter reaction. if voltage recovers
to 12 volts (6 volts for 6 volt battery) or more in a few seconds, then battery is probably
defective. if voltage recovers slowly battery may only be discharged. check electrolyte
specific gravity and proceed as above.
Charge %
0
20
50
75
100
Original Language Version
fig.2
load
sWitCh
positiVe
Cable
neGatiVe
Cable
Bt91/7Pf | issue 2(l) 26/02/16