For safety reasons
, the battery charger will only
recharge the units NICAD batteries when the
charger is plugged into the charging jack
and
the 620A-4R main power switch is in the “off”
position.
In this way the 620A-4R user can not
ever make a measurement while the unit is
charging.
The 620A 4R is power “On/Off”
switch design makes it impossible to be
powered (in operating - measurement mode)
directly from the AC line adapter. As an
additional note, the 620A 4R main power switch
must also be
in the “
Off/Charging
”
mode
in
order for the connected battery charger to
recharge the 620A 4R’s batteries.
A fully charged battery pack typically powers
the 620A 4R for approximately 8 hours before
requiring a recharge. AMPTEC installs a quality
set of 4 each Heavy Duty (5700 mAHr) Ni-Cad
batteries. The 620A 4R will also operate on a
4000 mAhr D cell Ni-Cads with a shortened
operating time between charges. Recharge time
is typically twice the “Power On” time. An
“Overnight” charge usually restores the 620A
4R to a “Fully Charged” ready to use state.
The “Power” switch has two separate modes.
The “ON” position supplies internal battery
isolated power to operate the 620A 4R when
they are charged. If you turn on the 620A 4R,
and the display does not come on, it may
indicate the batteries need charging. The “OFF/
CHARGING” power switch position is for use
when the batteries need charging or the 620A
4R is not in use. As mentioned earlier of
course the AC/DC Battery Charger must be
plugged into the 620A 4R’s notched connector
to facilitate charging the batteries.
As mentioned earlier of course the AC/DC
Battery Charger must be plugged into the 620A
4R’s notched connector to facilitate charging the
batteries.
Although the batteries are fully charged prior to
shipment, it may be desirable to refresh the
charge for 24 hours before use. As a rule of
thumb, the 620A 4R requires twice as much
time to fully recharge as the amount of
discharge time. For example, if the instrument
was used continuously for 2 hours, the AC
adapter must be connected for 4 hours in order
to fully restore the charge. If you need a
replacement AC/DC Battery Charger for the
630, contact the AMPTEC customer service
department and request an option “630DC”
Battery Charger.
When the 620A 4R is first turned on, the unit
draws more internal power to heat up the unit’s
ovenized zener voltage reference. If the “Low
Battery” Indicator only comes on for a few (i.e
10 to 15 seconds) seconds when the 620A 4R is
first turned on then goes out, the battery levels
are starting to indicate the charge level is low.
A-5.
Setup and Use
The AMPTEC 620A 4R Igniter Tester may be
setup to operate without the unit’s lid intact. By
removing the hinge pins the lid may be removed
(i.e. for indoor lab bench use). Typically a test
procedure will have the 620A 4R user test the
620A 4R with the units “Functional Test
Section” to determine it is functioning properly
and ready for use.
Once the AMPTEC 620A 4R has had it’s
batteries charged for 12 to 24 hours it is ready
for use. The 620A 4R consumes little power and
generates virtually no heat. Consequently, it
may be used in any area where the environment
does not exceed the specifications of Table B-2.
Avoid exposing the 620A 4R to extremes of
temperature which will affect accuracy and
shorten battery life-span.
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