3550 Battery HiTESTER Series
19
indication shows the installation category
(voltage proof category) of the product. UPS
battery installations correspond to category I.
The following four installation categories are
defined. Installation category I: Signal levels,
special equipment or part of equipment,
communication equipment, electronic
technology, etc. Installation category II: Local
levels, tools, portable equipment, etc.
Installation category III: Distribution levels, fixed
installations Installation category IV Primary
power levels, power lines, cable systems, etc.
The 9287 and 9467 do not comply with CE
marking requirements.
Q13. To which point of the battery
terminals should the pin type
leads be applied?
A13. The resistance of battery terminals is higher
than commonly assumed and may differ
depending on the contact point. Be sure to
apply the pin tips always to the same position.
Q14. Which points should be
considered when measuring the
impedance of a battery pack?
A14. Many battery packs have protective circuitry
that is located between the battery and the
external terminals. Some representative types
of protection circuits are: (1)PTC element
(Resistance rises when temperature rises.);
(2)Diode; (3)Battery control IC.
If only a PTC element is installed, the measured
value will be the combined resistance of the
PTC element and battery impedance. If diodes
or a battery control IC are installed, correct
impedance measurement is not possible.
Q15. How can the 3550 and 3551
measure the impedance of a
battery that is being charged?
Why can the 3555 not measure
the impedance of a battery that
is being charged?
A15. The 3550 and 3551 incorporate bandpass filters
which remove the influence of signals (such as
UPS ripple voltage) other than the
measurement frequency. The 3555 does not
have such bandpass filter circuitry and can
therefore not reliably measure a battery in a
noisy environment such as in a UPS. The
9461 pin type lead supplied with the 3555 also
has no barrier and is not allowed for
measurements in hazardous equipment such as
a UPS.
Q16. Can IEC R6 rechargeable ni-
cad batteries be used in place of
IEC R6 alkaline batteries?
A16. Rechargeable ni-cad batteries can be used, but
the unit does not have a facility for recharging
such battries. A separate charger is required.
Q17. How long can the unit operate
on six IEC R6 manganese
batteries?
A17. 3550:about 2.5 hours
3551:about 1.5 hours
Q18. Is there a carrying case for the
AC adapter?
A18. The carrying case for the logic probe of the
8800 series has just the right size and can be
used for the AC adapter.
Q19. Can the LCD be equipped for
backlighting?
A19. The LCD used in the 3551 is a reflective type
that cannot be adapted to backlighting.
To Next Page
Loading...
