1、FORD LABORATORY TEST METHOD BP 108-10 2001 O9 12 STATIC ELECTRICAL RESISTIVITY OF AUTOMOTIVE TUBING Revised Editorial - no technical change A. Cockman Application This method was developed to determine the electrical resistance of automotive tubing used in fuel handling. Materials and Apparatus Requ
2、ired Ohm Meter Resistivity meter (MEG-CHECK 21 OOA R-meter from Associates Research Inc. or equivalent. A Set Of Copper pins Diameter approximately 0.1 mm larger than I.D. of Tubing Conditioning and Test Conditions All test values indicated herein are based on the material conditioned in a controlle
3、d atmosphere of 23 +/- 2 OC and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions. Procedure 1. Prepare a test specimen as required by the relevant Engineering Materials Specification 2. Measure the sample length. Record as “ L,“ (mm). 3. Measu
4、re the inner diameter of the sample. Record as “ d “ (mm). 4. Insert the copper pins to full depth in ends of the tube assuring a tight fit. Measure the depth of the copper pin as “a“ (mm). Attach the leads to the resistivity meter as shown in Figure 1. Record the resistance as “ R “ (ohm). 5. I I D
5、ate I Action I Revisions I 1996 1203 I Copyright O 2001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BP 108-10 6. Calculate the Static Electrical Resistance as: Static Electrical Resistance (ohmkq) = R n d (Lo - 2a) Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. Figure 1 Copper Pin Sample Copper Pin I I. I Page 2 of 2 Copyright O 2001, Ford Global Technologies, Inc
