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1 Introduction
This section describes the features of the Cellcorder.
1.1 General Description
The Albércorp Cellcorder is a data storing battery multimeter that provides fast,
accurate information in a fraction of the normal test time. Compact and light
weight in design, this intelligent test unit displays and records readings of cell
float voltage, internal cell resistance, and intercell connection resistance. Other
data, such as specific gravity and temperature, can be entered manually.
The Cellcorder may be used on a single cell or multicell module. Readings up to
seven strings of 256 cells each or 28 strings of 64 cells can be stored and
displayed on a bright fluorescent display. The Cellcorder features are further
enhanced by a computer link and software that allows the transfer of readings to
a personal computer (PC) for further analysis and report generation.
1.2 Test Procedure Overview
The Cellcorder is a self-contained, battery powered unit comprised of a
microprocessor, load resistor, display, and rechargeable battery. Two sets of test
leads are provided: a standard set of digital voltmeter probes and a three clip set
used in the multimeter mode. Optional test leads are available from Albércorp.
When using the three clip set, connect the two larger test clips across the cell and
its associated intercell connector (from the positive post of the cell being tested to
the positive of the next cell), and connect the third smaller conductor clip to the
negative terminal of the cell being tested. (Refer to
Application Note CC-002
.)
After the leads are connected, the test sequence is initiated. First, the Cellcorder
reads and records the cell float voltage. Next, the unit connects a fixed resistance
across the cell and intercell being tested and forces a current of approximately
70 Amps to flow for a few seconds. During the load condition, the unit reads the
current and voltage and calculates the intercell connection resistance and internal
cell resistance.
