Modified Procedures For Special Conditions; Overview; Reversing The Current Source Leads - Megger BITE 2 Instruction Manual

5
MODIFIED PROCEDURES FOR SPECIAL
CONDITIONS

Overview

Reversing the Current Source Leads

AVTM246004 BITE 2/2P Rev 4 July 2011
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This chapter explains how to perform alternative test
procedures, including reversing the current source leads
and sectioning battery systems to correct high or low current
situations.
This chapter also describes optional equipment that can be
used with the BITE 2 and BITE 2P test instruments.
If the transmitter displays a high or low current message,
you need to modify the test procedure. See the following
subsections for alternative test procedures.
Figure 5-1 shows a battery system with a single string of
cells. If a high or low current message is displayed on the
receiver after you connect the current source leads to a
similar battery configuration, try reversing the polarity of the
current source leads. Doing so shifts the test current by 180
degrees and offsets the effect of the system ripple current in
the receiver. This helps ensure sufficient test current in the
section of the battery string to enable computation of cell
impedance or strap resistance.
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