7.9　Commissioning of Vertical Detecting Device

7.9.1　The commissioning of vertical detecting device shall meet the following requirements:

1　The drive unit shall run without rod for at least 30min in respectively in positive and reverse direction without abnormal noise or vibration.

2　The drive unit shall be regulated at"zero"point with rod according to the design documents and the allowable deviation is±20mm.

3　The travel limit of the rod at all stop positions shall meet the requirements in the design documents.

4　The rod shall travel from the standby position to the depth probing position for at least 3 times.The act shall be flexible and reliable.

5　The wirerope on the windlass drum shall not be less than 3 circles when the rod lowers to the extreme position of depth probing.

Check method:observe，measure and check the commissioning records.