Downloaded from https://www.everyspec.com MIL-STD-1311D METHOD 1136C ROUGH-HANDLING TEST END POINTS 1. Purpose. The purpose of this test is to determine the ability of the shipping pack or package to safeguard the tube from damage due to rough handling. 2. Acceptance criteria. Unless specially indicated on the TSS as "Required for qualification approval", this test shall not be performed as a qualification test. Tubes prepared for shipment in accordance with MIL-DTL-75 shall have met all applicable provisions of the TSS prior to the performance of the specified rough-handling test(s).
Upon completion of the MIL-DTL-75, section 4, rough-handling test(s), the tubes shall comply with the following acceptance criteria, as applicable: NOTE: All categories of tubes, other than those listed below, shall meet the initial acceptance limits of all tests specified under conformance inspection, part 1. a. Beam switching. Conformance inspection, part 1: Counting voltage range and current. b. Cathode-ray tubes. Shall be subjected to the following tests and shall meet the requirements specified. (1) The change in position of the undeflected focused spot from its position noted before the test shall not exceed the following values:
Tube diameter (inches) (mm) 1 - - - - - - - - - - - 2 - - - - - - - - - - - 3 - - - - - - - - - - - 4 - - - - - - - - - - - 5 - - - - - - - - - - - Change (mm) Tube diameter (inches) Change 1.5 7 - - - - - - - - - - - 9 - - - - - - - - - - - 10 - - - - - - - - - - - 12 and over- - - - - 5 6 6 8 3 3 4 4 (2) The change in deflection factor for electrostatic tube types shall not exceed 5 percent. (3) Starting with a tube with no loose particles, the maximum number of loose particles as a result of dropping shall be no more than a total of five loose particles greater than .016 inch in any one cathode-ray tube.
Tubes having any loose particles greater than .016 inch shall be vibrated with the face down in a horizontal plane at 5 G for 1 minute. If the screen shows damage from such vibration, the tubes shall be rejected. (4) The change in grid-cutoff voltage shall not exceed 10 percent. (5) There shall be no damage to the external parts of the tube. c. Cathode ray charge storage. Spot position, deflection factor, writing gun cutoff, loose particles. d. Cold cathode. Conformance inspection, part 1: Electrical tests. e. Crossed-field amplifier. Conformance inspection, part 1: Electrical tests. f. Electron multiplier. Conformance inspection, part 1: Operation. g. Electron-ray indicator.
Conformance inspection, part 1: Electrical tests. h. Gas-switching tubes. TR tubes shall pass the initial acceptance limits for the ignitor voltage test specified. Pre-TR and ATR tubes shall pass the initial acceptance limits for the firing time test specified. i. Graphic indicator Uniformity of cathode glow, conformance inspection, part 1: Ionization. j. Ignitron. Conformance inspection, part 1: Electrical tests. k. Image converter. Conversion index, cathode and screen quality. l. Image orthicon. Resolution, spurious signal, cutoff. METHOD 1136C 1136-1 28 March 1975