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Note:  Revisions on August 28, 2018, February 21, 2018, 

August 4, 2014, April 18, 2014, January 5, 2012, and 

November 23, 2009 affected formatting and company 

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information was dated June 15, 2004. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Avtron Aerospace, Inc. 

 ...........................................................................................................................  

 

Avtron Model T477W 

Bonding Meter 

with B14703 Battery Pack  

Replacement Instructions  

 

Part Number T477WC15292 

 ...........................................................................................................................  

 

  December 11, 1981 

Revised August 28, 2018 

Copyright © 2012 Avtron Aerospace, Inc. 

 

T.O. 33DA39-71-1 

 

 

Subject to the EAR, ECCN [9E610.a]. 

This information is subject to the export control laws of the United States, specifically including the 

Export Administration Regulations (EAR), 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 required export license or other approval from the 

U.S. Government is prohibited, including without limitation any diversion to a military end user or use in a military end use application. 

 

To buy, sell, rent or trade-in this product please click on the link below:

https://www.avionteq.com/Avtron-T477W-Bonding-Meter

www.avionteq.com

Summary of Contents for T477W

Page 1: ...AR ECCN 9E610 a This information is subject to the export control laws of the United States specifically including the Export Administration Regulations EAR 15 C F R Part 730 et seq Transfer retransfe...

Page 2: ...EAR 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 required export li...

Page 3: ...lication PROPRIETARY NOTE This document contains information PROPRIETARY to Avtron Aerospace Inc It is furnished solely to provide information sufficient for instruction operation maintenance evaluati...

Page 4: ...EAR 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 required export li...

Page 5: ...INSTRUCTIONS 2 1 2 1 Initial Operation 2 1 2 2 Battery Charging 2 1 2 3 Probes 2 1 2 4 Minimizing Error Contributed by Probes 2 2 2 5 C22161 Probe Set 2 2 2 6 C15479 Probe Set Optional 2 3 2 7 C15478...

Page 6: ...whether in the United States or abroad without any required export license or other approval from the U S Government is prohibited including without limitation any diversion to a military end user or...

Page 7: ...ed with a set of probes having four wire Kelvin connections In addition a separate power supply is provided for charging the T477W batteries The T477W Bonding Meter is certified by Underwriter Laborat...

Page 8: ...cifically including the Export Administration Regulations EAR 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...

Page 9: ...be charged for 14 16 hours Continuous charging for prolonged periods weeks or months is not recommended Refer to Section VI for further details on battery charging and power sources other than 120 VAC...

Page 10: ...is alternating therefore a small transformer effect coupling exists between the current sourcing and voltage sensing leads This effect is best minimized when the voltage sensing leads are separate fro...

Page 11: ...3 2 6 C15479 Probe Set Optional These probes Figure 2 2 have separate current and voltage leads and the voltage sensing leads are bound together for nearly the full length of the cable which best mini...

Page 12: ...are identified by the following GRIP COLOR CODE Black is for positive and negative current Red is for positive and negative voltage Additionally on the compass style probes the blunt spring loaded ti...

Page 13: ...automatically positioned for each range In order to conserve battery power a built in timer automatically shuts off the display after 52 seconds of operation The display may be illuminated by pressin...

Page 14: ...tors Temperature Capacity is rated for room temperature operation 25o C and is tested for operation at 15 and 60o C Operation above room temperature causes significant reduction in capacity Charge His...

Page 15: ...U S Government is prohibited including without limitation any diversion to a military end user or use in a military end use application 3 1 3 CIRCUIT DESCRIPTION The T477W is designed to measure value...

Page 16: ...specifically including the Export Administration Regulations EAR 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...

Page 17: ...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 resista...

Page 18: ...edure There are no user adjustable components If an alignment failure is found during the verification contact Avtron Aerospace Inc to return the unit for repair NOTE Perform the above field calibrati...

Page 19: ...with a broken tamper seal may be honored only after an evaluation of the meter is performed by Avtron 4 5 Preventive Maintenance The T477W is powered by rechargeable nickel cadmium batteries The batte...

Page 20: ...serious One method of testing the battery pack is to load it with 22 ohm 2 watt resistor and measure the terminal voltage It should be 4 volts or 0 2 volts for a fully charged battery A better test to...

Page 21: ...the front panel from the case The battery is the large blue black panel labeled B14703 located in the middle of the bottom circuit board The battery connections are the four terminals labeled 1 2 3 a...

Page 22: ...pecifically including the Export Administration Regulations EAR 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 i...

Page 23: ...and must be set to the appropriate range before use Failure to position the switch to the appropriate range may damage the power supply It is recommended that power supplies operated from input power...

Page 24: ...pecifically including the Export Administration Regulations EAR 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 i...

Page 25: ...tery may remain on the circuit board with the meter display off 2 Open the case to gain access to battery pack leads as described in steps 1 and 2 in the B14703 Battery Replacement Instructions at the...

Page 26: ...roval from the U S Government is prohibited including without limitation any diversion to a military end user or use in a military end use application 7 2 7 Batteries failing the discharge test may ha...

Page 27: ...locations Battery Packs are shipped in a discharged condition Therefore newly installed batteries must be recharged overnight before use See T477W manual for recharging instructions 8 1 Battery Repla...

Page 28: ...to similar numbered connecting wires that is 1 goes to 1 2 goes to 2 3 goes to 3 and 4 goes to 4 9 Install Battery Pack mounting screws and washers previously removed 10 Reposition printed circuit boa...

Page 29: ...rostatic discharge precautionary procedures The following guidelines are not necessarily all inclusive but rather serve as reminders for good shop practices for the handling repair of ESD sensitive ci...

Page 30: ...ates specifically including the Export Administration Regulations EAR 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 whe...

Page 31: ...in this section contains the description quantity required and Avtron part numbers for each listed part The list also includes where appropriate schematic reference designators to facilitate parts ide...

Page 32: ...Set C15479 1 Probe Set C15480 1 Probe Set C16695 1 NOTE Miscellaneous probe set replacement parts available WARNING This information is subject to the export control laws of the United States specifi...

Page 33: ...version to a military end user or use in a military end use application DRAWINGS PROPRIETARY NOTE The wiring diagrams and schematics which follow contain information PROPRIETARY to Avtron Aerospace In...

Page 34: ...EAR 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 required export li...

Page 35: ...EAR 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 required export li...

Page 36: ...EAR 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 required export li...

Page 37: ...EAR 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 required export li...

Page 38: ...EAR 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 required export li...

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