3550 Battery HiTESTER Series
13
different. The 3550, 3555, 3551, and 3225
measure the AC 1 kHz resistance value.
[Voltage measurement]
Is the SOURCE- Hi terminal connected to the
generator? When all four terminals are
connected, the constant current generated by
the 3550 series unit may cause malfunction,
preventing correct voltage from being output.
Information about this point is included in the
manual.
Q13. When measuring a battery
connected to and operating
UPS, do ripple voltage
components caused by the
charging process affect the
measurement?
A13. The 3550 and 3551 use noise canceling
technology to reduce the influence of ripple
voltage components on the measurement.
However, if ripple voltage components are
very large, the indication may fluctuate and
will not be correct. The allowable ripple
voltage rating is listed at the end of the
documentation for the 3550 and 3551.
Q14. Why does the 9465 pin type
lead use curled cables?
A14. Resistance measurements can be affected by
electromagnetic induction from nearby
metallic objects. This problem becomes
more pronounced when small resistance
values are to be measured and when the loop
area of the divided section of the
measurement leads is large. The 9465 uses
curled cables to keep the loop area of the
divided section as small as possible.
7 Voltage Measurement…...…………..………………………………
Q1. Why is voltage measurement
necessary?
A1. Voltage measurement is performed
simultaneously with the measurement of
specific gravity during maintenance for lead
storage batteries and alkaline storage
batteries. If the voltage is extremely low, the
battery may be damaged (it may have in
internal short circuit). In addition, if the
voltage is high, it is possible that a charger or
another battery connected in series with the
battery in question could suffer damage. The
3550 and 3551 detects battery deterioration
through the battery's internal resistance, and
checks whether the battery is damaged
according to its voltage and temperature (only
3550). The internal resistance of a battery
differs during charging and recharging. The
3555 check for excessive discharging
according to the battery voltage .The 3550
and 3551 also checks whether the battery is
damaged in the same manner.
Refer to the reference material
at the end of guide.
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