R B. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R 20-28-00-720-011 R R R 20-28-00-869-002 R 20-28-00-991-038
R 3. Job Set-up
__________
R Subtask 20-28-00-869-086
R A. General Measurement of the Surface Electrical Resistance of External Composite Panels with a CORAS Resistivity-Continuity Test Set Table of the Maximum Permitted Resistance Values Fig. 501
R (1) The recommended method for the measurement of the surface electrical R resistance of an external composite panel with or without R non-conductive finish paint on the antistatic paint, uses a R resistivity-continuity test set (Ref. TASK 20-28-00-720-011).
R (2) This procedure gives an alternative method for the measurement of the
R surface electrical resistance of an external composite panel, only if
R there is no non-conductive finish paint on the antistatic paint.
R 4. Procedure_________
R Subtask 20-28-00-869-087
R A. Measurement of the Surface Electrical Resistance
R (1) Equipment
R (a) For fairings (but not antenna fairings and radome):
R - Ohmmeter 50 Kohms - 500 volts - 1 mA (max.), with 2
R rounded-point prods, diameter 4 mm (0.1574 in.).
R (b) For antenna fairings and radome:
R - Megohmmeter 100 Megohms - 500 Volts - 1 mA (max.), with 2
R rounded-point prods, diameter 4 mm (0.1574 in.).
R (c) 3M Conductive Electrical Tape (X-1181-Copper or X-1170-Aluminum)
R (2) On the surface, apply two parallel strips (100 mm (3.9370 in.)
R length) of 3M conductive electrical tape, 100 mm (3.9370 in.) apart,
R to make a square.
R
R (Ref. Fig. 501/TASK 20-28-00-991-038)
R (3) Apply a prod of the ohmmeter/megohmmeter on each strip, and read the
R Square Resistance value.
R (4) Make sure that the measured values are not higher than the maximum
R permitted values. (Ref. TASK 20-28-00-869-002)
R NOTE : Do the steps (2) to (4) again several times at different areas____
R of the surface.
R (5) Remove the test equipment.
R (6) Remove the electrical conductive tape strips.
R Conductive Electrical Tape Installation Figure 501/TASK 20-28-00-991-038
1EFF : 1 1 1CES ALL 1 111 20-28-00 Page 534 May 01/99
R 5. Close-up
________
R Subtask 20-28-00-942-113 R A. Close Access R (1) Make sure that the work area is clean and clear of tool(s) and other
R items.
R TASK 20-28-00-720-011- 02
R Measurement of the Surface Electrical Resistance of External Composite Panels R (without Non-Conductive Finish Paint) with Probes
R 1. Reason for the Job
__________________ R Self Explanatory R 2. Job Set-up Information
______________________
R A. Fixtures, Tools, Test and Support Equipment
R -------------------------------------------------------------------------------R REFERENCE QTY DESIGNATION
R -------------------------------------------------------------------------------
R No specific Megohmmeter 100 Megohms - 500 Volts - 1 mA (max.)
R No specific Ohmmeter 50 Kohms - 500 Volts - 1 mA (max.)
R No specific Probe per DIN65181
R B. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R 20-28-00-720-011 R R R 20-28-00-869-002 R 20-28-00-991-037
R 3. Job Set-up
__________
R Subtask 20-28-00-869-088
R A. General Measurement of the Surface Electrical Resistance of External Composite Panels with a CORAS Resistivity-Continuity Test Set Table of the Maximum Permitted Resistance Values Fig. 502
R (1) The recommended method, for the measurement of the surface electrical R resistance of an external composite panels with or without R non-conductive finish paint on the antistatic paint, uses a R resistivity-continuity test set (Ref. TASK 20-28-00-720-011).
R (2) This procedure gives an alternative method, for the measurement of
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