---
kind: "section"
citation: "46 C.F.R. § 162.050-37"
title: "46"
number: "162.050-37"
heading: "Vibration test."
url: "https://uscodex.org/cfr/46/162.050-37"
---

# §162.050-37. Vibration test.

- (a) Equipment submitted for Coast Guard approval must first be tested under the conditions prescribed in [paragraph (b)](#b) of this section. The test must be performed at an independent laboratory that has the equipment to subject the item under test to the vibrating frequencies and amplitudes prescribed in [paragraph (b)](#b) of this section. The test report submitted with the application for Coast Guard approval must be prepared by the laboratory and must contain the test results.
- (b)
  - (1) Each oil content meter and bilge alarm and each control of a separator must be subjected to continuous sinusoidal vibration in each of the following directions for a 2 hour period in each direction:
    - (i) Vertically up and down;
    - (ii) Horizontally from side to side; and
    - (iii) **Horizontally from end to end.**
  - (2) The vibrating frequency must be 80 Hz, except that the vibrating frequency of equipment that has a resonant frequency between 2 Hz and 80 Hz must be the resonant frequency. If the vibrating frequency is between 2 Hz and 13.2 Hz, the displacement amplitude must be ±1 mm. If the vibrating frequency is between 13.2 Hz and 80 Hz, the acceleration amplitude must be ±[(.7)(gravity)].
- (c) After completion of the tests specified in [paragraph (b)](#b) of this section, a search must again be made for resonance and any significant change in the vibration pattern must be noted in the test report.

## Notes

### Amendments

[CGD 76-088a, 44 FR 53359, Sept. 13, 1979, as amended by USCG-2004-18939, 74 FR 3392, Jan. 16, 2009]

### Source

Source: CGD 76-088a, 44 FR 53359, Sept. 13, 1979, unless otherwise noted.

### Authority

Authority: 33 U.S.C. 1321(j), 1903; 46 U.S.C. 3306, 3703, 4104, 4302; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; E.O. 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; DHS Delegation 00170.1, Revision No. 01.4.

### Amendments

[CGD 76-088a, 44 FR 53359, Sept. 13, 1979, as amended by USCG-2004-18939, 74 FR 3392, Jan. 16, 2009]