Optical Fiber Cable Water Penetration Tester – TT-WPT
The Optical Fiber Cable Water Penetration Tester TT-WPT is designed to determine the ability of a cable to block water migration along a specified length. Compliance shall be checked on samples of cable using one of the two following methods (F5A or F5B). Method F5A tests for water migration between the outer interstices of the optical core and the outer sheath, whereas method F5B tests for water migration over the entire cross-section designed to be water-blocked.
Test Procedure According to Method F5-A
According to Method F5-A, a circumferential portion of sheath and wrapping 25 mm wide shall be removed 3 m from one end of a sample length of cable and a watertight sleeve shall be applied over the exposed core so as to bridge the gap in the sheath and allow a 1 m height of water.
Test Procedure According to Method F5-B
According to Method F5-B, a cable sample longer than 1m length is tested, which shall not exceed 3m. If required, the sample is submitted to the bending procedure. A maximum cable length of 3 m shall then be taken from the central portion of the sample. A watertight seal shall be applied to one end of the sample to allow a 1m height of water.
Note: For armoured cables where the armour is not designed to be water-blocked, the armour may be removed before the application of the seal.
The test apparatus consists of a vertical pipe containing water at a height of 1 meter. The pipe is connected at its bottom to a flexible tube that allows watertight connection to the cable under test. The cable sample is laid flat and a suitable arrangement is made in order to determine if water leaks from its exposed end.
The sample is supported horizontally and a 1 m height of water is applied for 24 hours. A water-soluble fluorescent dye or other suitable coloring agent may be used to aid in the detection of water seepage.
Pass / Fail Criteria
No water leaks are detected from the exposed cable end.
Test Set-up Features
- Applicable Test Standard: IEC-794-1-2-F5A, IEC-794-1-2-F5B
- Applicable Cable Diameter: up to 40 mm
- Duration of Test: 24 Hours
- Cable Length under Test: 1m
- Water cylinder: ø80 x 1000 mm
- Water outlets: ø30 x 8 mm
Scope of Supply
The standard scope of supply includes following:
- Mechanical Base Unit
- Water Column with 1 meter height