620LK Operation and Maintenance Manual – Rev. J – Updated January 2020
Page 13
13231 Rooster Springs Rd.
Austin, TX 78737
T:
(512) 858-4045
E:
amptec.com
SECTION E: MAINTENANCE, REPAIR, AND CALIBRATION
E-1 General Maintenance, Repair, and Calibration Information
The AMPTEC 620LK meter was designed with the intent of using high quality, strong,
and reliable components both internally and externally. As a result, the unit is extremely
reliable and rarely requires repair. Should the unit require maintenance or repair that
cannot be performed by the end user, we recommend sending the product to AMPTEC
RESEARCH’s facility to perform this service. Malfunctions can sometimes be the result
of bad test lead/connection wiring, wrong connections, misinterpretation of
specifications, low battery levels, or a misunderstanding of how to use the product.
The below sections will provide information on sending your unit to AMPTEC for repair,
as well as how the user can perform some maintenance, troubleshooting, and
calibration techniques on their own.
E-2 Returning the 620LK to AMPTEC for Maintenance, Repair, and Calibration
AMPTEC RESEARCH has been proudly providing product support for all of our
equipment for the past 20 years. Part of this support is offering maintenance, repair, and
calibrations for our instrumentation. Our staff is highly trained across our product lines
and is capable of fixing nearly any issue your instrument may have. AMPTEC maintains
one sole facility for both the manufacturing and repair of its products:
AMPTEC RESEARCH CORP.
14101 Hwy 290. W.
Bldg. 2000A
Austin, TX, USA 78737
Should you have a product that you would like to be sent in for maintenance, repair, or
calibration, it can be sent to the address above.
Before sending in a product to our
facility, you must contact a member of our staff and receive an RMA #.
We can be
or phone at 512-858-4045. The purpose
process of this is so that we can obtain your full contact information and properly
coordinate the return of the AMPTEC meter.
Once we have received your meter, we will diagnose the issue for free and provide you
with pricing information. If diagnosing the problem requires one of our technicians to
open the product in order to reach the internal circuitry, a calibration fee will be required
for us to send the product back to you. This is because we have a plant-wide policy that
all instrumentation must be calibrated before leaving our facility – it would be unethical
to allow out of ordnance products to be sent to an end user.
E-3 Circuit Board Operation Overview
There is one internal printed circuit board (PCB) that performs the digital ohmmeter
resistance measurement. The AMPTEC 620LK meter uses a constant current source
circuit and DVM circuitry all on one PCB. When the constant current source is combined
with the digital voltmeter circuit, the result is a stable DC resistance measurement.
