Preparations Before The Test; Connecting The Tester - Midtronics MDX-652P Instruction Manual

MDX-652P

Preparations Before the Test

Before connecting the tester, clean the battery posts or side terminals with
a wire brush and a mixture of baking soda and water. When testing side-
post batteries, install and tighten lead terminal adapters. A set of adapters is
included with the tester.
IMPORTANT: Do not test at steel bolts. For OUT-OF-VEHICLE testing,
failure to install terminal adapters or installing terminal adapters that
are worn or dirty may result in inaccurate test results. To avoid dam-
age, never use a wrench to tighten the adapters more than ¼ turn.
If you are testing in the vehicle, make sure all accessory loads are off, the key is
not in the ignition, and the doors are closed.

Connecting the Tester

•
Connect the red clamp to the positive (+) terminal and the black clamp to
the negative (–) terminal.
•
For a proper connection, move the clamps back and forth. The tester re-
quires that both sides of each clamp be firmly connected before testing. A
poor connection will produce a CHECK CONNECTION or WIGGLE CLAMPS
message. If the message appears, clean the terminals and reconnect the
clamps.
•
The preferred test position is at the battery terminals. If the battery is not
accessible, you may test at the jumper post; however, the available power
measurement may be lower than the actual value.
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