A-1. Introduction
to the AMPTEC 640N
The AMPTEC 620A, 630 and now the 640
Series Igniter Testers/Failsafe Ohmmeters are
becoming the standard in the Safety Igniter
Circuit Test industry, and are designed to
provide extremely safe and reliable resistance
testing of explosive or volatile devices. Safety
Approvals from various Safety Boards include,
the U.S. Air Force ( 620A-4) for generic use on
Non-Nuclear munitions and the US NAVAL
ORDNANCE CENTER (630AN and other
versions pending). Some of the devices the
640N Failsafe Ohmmeter may be used on
include: fuses, squibs, igniters, explosive bolts,
rocket motor squibs, automobile air-bag
initiators and many others.
The AMPTEC 640N is a 4-wire failsafe digital
ohmmeter which has been designed to reliably
use very low test currents for its resistance
measurement. Failsafe Output Circuitry
proprietary to AMPTEC RESEARCH insures
that test current levels do not exceed the
specified "failsafe current" even in a worst-case
component failure situation. The failsafe feature
is tested in every instrument before shipment.
An On board DC Milliammeter also lets the user
verify actual 640N current output levels, prior to
connection to a squib or detonator.
The 620A and the newer 640 series represent the
latest in ultra-safe Igniter Tester measurements.
The 640N uses the same main printed circuit
board (PCB) as the AMPTEC 620A Igniter
Tester. The 640N has been made water-resistant
and has many features which make it useful in a
variety of applications. Please check the last
chapter of this manual for addendums that may
apply to new 640Ns and 630AN conversions.
Should the rechargeable batteries reach a low
charge level a negative sign will apear on the
display. The 640N has a
battery monitoring
circuit that indicates it is time to plug in the
battery charger.
A-2. Receiving, Unpacking, and Initial
Inspection
Should the AMPTEC shipping box appear
damaged upon arrival, request that the carrier's
agent (i.e. UPS) be present when the unit is
unpacked. If the 640N appears damaged, the
carrier's agent should authorize repairs before
the unit is returned to the factory. Even if the
instrument appears undamaged, it may have
suffered internal damage in transit that may not
be evident until the unit is operated or tested to
verify conformance with its specifications. You
may refer to the
Functional Test section of
Section D of this manual to help identify the
problem
(i.e Test leads etc.)
The 640N has a set of test
resistors built-in the
Functional Test Section that
can quickly help the user
figure out where the
problem is most of the time.
If the unit fails to operate or
fails to meet the performance specifications of
Section B, notify the carrier's agent and the
nearest AMPTEC Sales Office. Retain the
shipping carton for the carrier's inspection.
DO
NOT
return equipment to AMPTEC
RESEARCH
or any of its sales offices
without
first obtaining
an (RMA) Return Material
Authorization number. We need to know who to
contact and how to contact (i.e. phone number
and FAX number) in order to properly
coordinate the return of the repaired AMPTEC
product.
By calling AMPTEC RESEARCH first, prior
to just returning the 640N, we can often
troubleshoot (based on the symptoms you
describe) and identify the problem over the
phone (i.e battery loose in the battery holder).
We may possibly be able to fix the problem over
the phone and prevent you from having to return
the unit to AMPTEC for repair.
R M A
SECTION A - RECEIVING AND INITIAL INSPECTION
Содержание 640N
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