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Chapter 1 Overview
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NOTE
Chapter 1
Overview
The 3550 is designed for measuring the internal resistance,
open-circuit voltage, and terminal temperature of secondary
batteries, including lead-acid batteries, nickel-cadmium
batteries, nickel-metal hydride batteries, and lithium-ion
batteries.
Features
Since it uses the AC four-terminal method to measure the
internal resistance, it provides accurate results with the lead
resistances and contact resistances eliminated.
It is possible to display the readings for the battery internal
resistance, voltage, and terminal temperature, without
changing functions. Moreover, a composite comparator
function, which can be set on resistance and voltage values,
enables reliable detection of battery deterioration.
The unit's memory function also allows a number of sets of
readings to be stored at a touch, and later output to a
printer.
These functions make this an ideal tool for checking
batteries which are under constant trickle charging and
cannot be disconnected.
Measurements are taken by using noise reduction technology to
attenuate noise at frequencies other than the measurement
frequency (1 kHz). Incorrect measurements may result if a large
1-kHz noise component from the charger is present at the battery
terminals.
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