620A 4
620A-4
620A-4
620A-4
620A 4
620A-4
620A-4
A-3.
AC/DC Battery Charger - Power
Requirements
The AMPTEC
uses an internal
rechargeable heavy-duty nickel-cadmium
battery pack (4 D cells - 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 battery charger outputs 6.0
VDC @ 100 mA. The battery charger circuitry
is configured such that the 620A-4 main power
switch must also be in the “OFF” position.
The 620A-4 main power “On/Off” switch
design makes it impossible to be powered (in
operating - measurement mode) directly from
the AC/DC Battery Charger. When the
main power switch is in the “On” position the
The “OFF/ CHARGING” power switch position
is for use when the batteries need charging or
the 620A-4 is not in use. As mentioned earlier
the Battery Charger (115 VAC 60 Hz powered)
must be plugged into the 620A-4’s rear panel
charging jack 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-4 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 to fully restore the
charge.
620A-4
rear panel charging jack is electrically
disconnected from all 620A-4 circuitry.
A fully charged battery pack typically powers
the 620A-4 for approximately 8 hours before
requiring a recharge. AMPTEC installs a quality
set of 4 each Heavy Duty (5000 mAHr) Ni-Cad
batteries (option 620-BAT) set of 4 each. The
620A 4 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-4 to a “Fully
Charged” ready to use state.
If you turn on the 620A-4, and the display does
not come on, it may indicate the batteries need
charging.
The diagram on the right shows a rear panel
view of the 620A-4 Igniter Tester. To check the
fuse, remove the cap from the fuse holder. The
620A-4 uses a 2-ampere fast blow (3AG size).
Only replace with an identical rated fuse.
A spare or replacement battery charger (option
“620-DC”) or replacement set of 4 heavy duty
NICAD batteries (option "620-BAT") may be
purchased if needed, contact the sales
department at AMPTEC RESEARCH.
620A-4
620A-4
620A-4
620 Battery Charger
Option "620-DC"
