Avtron Model T477W Bonding Meter
with B14703 Battery Pack Replacement Instructions
Part Number T477WC15292
Calibration and Maintenance Procedures
Subject to the EAR, ECCN [9E610.a].
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15 C.F.R. Part 730 et. seq. Transfer, retransfer, or disclosure of this data by any means to a non-U.S. person (individual or company), whether in the United States or abroad, without any
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4-1
4
CALIBRATION AND MAINTENANCE
PROCEDURES
4.1
Calibration
The circuit is composed of solid state devices which have been subjected to extensive testing and therefore few failures are
anticipated. However, periodic testing against a known resistance standard is recommended. Testing may be easily performed
using the K777 Verification Fixture. The meter may also be returned to Avtron Aerospace, Inc., for a complete calibration for
a reasonable fee as described below.
4.2
Field Calibration Procedure
Equipment required:
Avtron T477W, Part Number C15292 Bonding Meter (Unit Under Test)
Avtron K777, Part Number C15293 Calibration Test Fixture
Procedure:
1.
Connect P1 of the K777 Calibration Test Fixture to J1 of the T477W Bonding Meter (Unit Under test).
2.
Follow the table below to verify the accuracy of the Bonding Meter. For each K777 switch position in column one, set
the T477W to the range in column two by pressing the test button. Read the T477W display and compare to desired
value.
