A-3.
AC/DC Battery Charger - Power
Requirements
The AMPTEC 620ES is powered by an internal
rechargeable heavy-duty nickel-cadmium battery
pack (4 ea D cell - 5.0 AHr). Replacement batteries
may be purchased, contact the sale department at
AMPTEC RESEARCH.
The battery charger is an external AC/DC converter
that plugs into a standard 115VAC receptacle. The
AC powered battery charger provides 6VDC @
250mA for charging the AMPTEC 620. The
AMPTEC 620ES is designed so it is impossible to
be powered (in operating - measurement mode)
directly from the AC line battery charger. As an
additional note, the 620ES main power switch
must
also be
in the “
Off/Charging
”
mode
in order for the
connected battery charger to recharge the 620ES’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 620ES Failsafe Ohmmeter shipment for an
additional fee.
A fully charged battery pack typically powers
the 620ES for approximately 6 ~ 8 hours before
requiring a recharge. AMPTEC installs a quality
set of 4 each Heavy Duty (5000 mAHr) Ni-Cad
batteries. The 620ES 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 620ES to a “Fully Charged”
ready to use state.
The main “Power” switch has two separate
modes. The “ON” position supplies internal
battery isolated power to operate the 620ES
when they are charged. If you turn on the
620ES, 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
620ES is not in use. As mentioned earlier of
course the AC/DC Battery Charger must be
plugged into the 620ES’s rear panel charging
jack/ 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 620ES 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 620, contact the
AMPTEC customer service department and
request an option “620DC” Battery Charger.
Located on left hand portion on the 620ES
display is the “Low Battery” indicator box.
Check for no “Low Battery” indication. If the
LED display shows a negative (-) or minus sign
in the indicator box the unit’s batteries are low
and need charging. The absence of the negative
sign in the battery indicator box indicates the
batteries are acceptably charged.
Fuse
(2 Amp-fast blo)
620ES
