Zebra ZebraStat ZS-2, Руководство по эксплуатации

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Voltage Problems
Voltage problems in a system are frequently
overlooked, but are very easy to find. For in-
stance, many technicians don’t compare the
current draw on contactors when replacing
one. In most cases there won’t be a problem,
but if the transformer is already close to its
output capacity, and the new contactor re-
quires a higher current level to close, inter-
mittent problems are likely to arise, especially
if the line voltage drops a few percent because
of high demand, say, on a hot afternoon.
The
ZebraStat
has a built-in voltage monitor
section that makes it easy to tell if the voltage
being supplied at the Red and Blue leads is
adaquate. (These voltages could easily be de-
termined with a voltmeter, of course; but many
technicians do not check for low-voltage lev-
els while under load, even though they
could .)
Getting used to glancing at the VOLTAGE
section of the
ZebraStat
may help you de-
tect some of these problems before they ac-
tually caus
e a fault.
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