3550 Battery HiTESTER Series
3
1 Display………………………………………………………………...
Q1. Why does the 3550 series
comparator display a warning
when it finds the resistance of a
battery to be between the upper
and lower limits, i.e., (lower
limit resistance value)
<resistance < (upper limit
resistance value)
?
A1. When a battery is new, it has a low internal
resistance, but as the battery deteriorates the
internal resistance becomes larger. This is due
to corrosion on the plates, loss of electrolytic
solution, etc. Therefore, when the comparator
is found to be in the "IN"condition during battery
maintenance work, a warning is generated.
However, when the battery is shipped from the
factory, it passes inspection as long as it falls
between the upper and lower limits for both
resistance and voltage. At HIOKI, we use
these units in combination with the 3225 and the
3236.
Q2. If a negative voltage is displayed,
the comparator makes an
incorrect evaluation if the polarity
of the test leads is reversed
when connected to the battery.
(To be more precise, rather than
incorrectly evaluating the
voltage, it judges the voltage
low.) Is it possible to ignore the
negative polarity for the
evaluation?
A2. Although it is not possible with the 3550 series,
we will consider implementing such a capability
in a future BATTERY HiTESTER/AC
mΩHiTESTER.
Q3. After inserting batteries in the
3551 (or connecting the AC
adapter), power does not come
on immediately. Is this a
defect?
A3. When batteries are first inserted or when
batteries were fully depleted and are replaced
(or when the AC adapter is connected), the unit
will not come on for about 15 seconds. This is
because the internal backup capacitor is being
charged. It is not a defect. Information about
this point is included in the manual.
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