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|  MIL-L-27160 (USAF)
measurements of the indicia and of the background shall be taken with the axis of the
brightness meter perpendicular to the surface being measured. An average of the indicia
and background reading shall be used to determine conformance to the contrast values
specified in 3.5.
4.5.7 Dielectric. For nonhermetically sealed instruments, a voltage of 500V plus twice
the lamp circuit design voltage at 60 Hz shall be applied for one minute between each
terminal and the case and between the lighting terminals with the lamps removed. If the
case is hermetically sealed, 200V at 60 Hz shall be applied between each terminal and the
case for one minute. There shall be no insulation breakdown as a result of this test.
5. PREPARATION FOR DELIVERY
5.1 Preservation, packaging, packing, and marking shall be as specified in the applicable
detail specification.
6. NOTES
6.1 Ordering data. Procurement documents should specify the following:
a. Title, number, and date of this specification
b. When sampling plan B tests will not be conducted (see 4.4.2.2)
6.2 Marginal indicia. The margins of this specification are not marked with an asterisk to
indicate where changes (additions, modifications, corrections, deletions) from the previous
issue were made. This was done as a convenience only and the Government assumes no
liability whatsoever for any inaccuracies in these notations. Bidders and contractors are
cautioned to evaluate the requirements of this document based on the entire content
irrespective of the marginal notations and relationship to the last previous issue.
6.3 Amendment. Amendments are incorporated into this document.
Custodian:
Preparing activity:
Air Force - 11
Air Force - 11
Review activity:
Air Force - 82
Project No. 6610-F176
11
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