User's Manual

M.A.C. TEST (A QUICK CHECK FOR APPOXIMATE STATE OF CHARGE)

M.A.C. = Minutes After Checking (below 30° F, allow two minutes)

Note: If load test is unsatisfactory, refer to the battery analysis chart on page 2.

1. If load test is O.K., leave tester connected and observe meter. If pointer moves to the right

of the green area (white charging area) in less than one minute after load test, it indicates

a reasonable state of charge.

2. If meter reads within or below the MAC area AFTER one minute, battery has a low state of

charge. Check with a hydrometer if possible and recharge as required. Check charging

system (refer to page 5) to determine cause of low state of charge.

BAD CELL INDICATORS

1. Gravity varies more than 25 points (0.025 s.g.) from cell to cell. A sign impending, but not

immediate failure.

2. Electrolyte fluid appears grey or cloudy or shows suspended particles. A sure indication of

age or abuse and approaching end of life.

3. One or more cells are dry while remaining cells show normal electrolyte levels. Not a

healthy sign, even though battery may test normally.