OPERATING INSTRUCTIONS
Battery Load Test
1. Connect the RED clamp to the Positive (+) battery terminal or post
2. Connect the BLACK clamp to the Negative (-) battery terminal or post.
Note: If testing a battery in the vehicle, ensure the engine and all loads are‘OFF’.
3. Check the battery’s open circuit voltage (OCV) on the DC Volt meter.
– If the needle is in the green section of the ‘State of Charge’ scale (above 6.5V, 12.5V, 24.5V) the battery
has sufficient charge to test.
– If the needle is in the red section (below 6.5V, 12.5V, 24.5V) the battery needs to be fully charged
before testing.
4. Determine the battery’s rated capacity in Cold Cranking Amps (CCA) or Amp hours (Ah) and calculate the
correct load current:
Cranking batteries with: Load current = 1/2 the CCA rating
Deep Cycle Batteries with: Load current = 3 x Ah rating
5. Turn the ‘Load Control Knob’ clockwise until the correct load current is reached on the DC Amps meter.
6. After 15 seconds the buzzer will sound to indicate the correct test time, immediately read the DC Volt
meter.
– If the needle is in the green area of the ‘Battery Test’ scale the battery has passed the test.
– If the needle is in the red area the battery has failed the test, quickly reduce the load current until the
needle moves back into the green area, and then read the approximate battery capacity in Ah or CCA
from the DC Amps meter.
ONCE THE METER HAS BEEN READ THE LOAD MUST BE TURNED OFF
IMMEDIATELY TO PREVENT OVERHEATING – TURN THE LOAD CONTROL
KNOB FULLY ANTI-CLOCKWISE.
Note: Battery ouput varies due to temperature change, the ‘Battery Test’ scale has four temperature
calibrations (21
o
, 10
o
, -1
o
and -18
o
Celcius). Use the closest scale to the approximate ambient temperature.
