For safety reasons
, the battery charger’s
notched connector blocks access to the test lead
connections that are also part of the 640N keyed
connector. The main “J1” 640N connector is a
single access or one use at a time Safety
Protection Device.
In this way the 640N user
can not ever connect any test leads while the
unit is charging
. The 640N test leads have to
use the same J1 notched connector. The 640N is
designed so it is impossible to be powered (in
operating - measurement mode) directly from
the AC line adapter. As an additional note, the
640N main power switch
must also be
in the
“
Off/Charging
”
mode
in order for the
connected battery charger to recharge the
640A’s batteries.
For customers using 220VAC 50 HZ AC line
power for running the battery charger, please
inform AMPTEC’s sales department at the time
of your order and the appropriate adaptor will
be included with the 640N Failsafe Ohmmeter
shipment for an additional fee.
A fully charged battery pack typically powers
the 640N for approximately 8 hours before
requiring a recharge. AMPTEC installs a quality
set of 4 each Heavy Duty (5700 mAHr) Ni-Cad
batteries. The 640N 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 640N 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 640N when they
are charged. If you turn on the 640N, 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 640N is
not in use. As mentioned earlier of course the
AC/DC Battery Charger must be plugged into
the 640N’s notched connector to facilitate
charging the batteries.
As mentioned earlier of course the AC/DC
Battery Charger must be plugged into the
640N’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 640N 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 640, contact the
AMPTEC customer service department and
request an option “640DC” Battery Charger.
When the 640N 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 640N 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 640N 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 640N user test the 640N
with the units “Functional Test Section” to
determine it is functioning properly and ready
for use.
Once the AMPTEC 640N has had it’s batteries
charged for 12 to 24 hours it is ready for use.
The 640N 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 640N to extremes of
temperature which will affect accuracy and
shorten battery life-span.
Summary of Contents for 640N
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