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C550c Operation Manual
6 Operating the system
6.10 Zero the camera distance
Your survey needs to accurately record the distance of the camera from the starting manhole. This
ensures that pipe defects can be accurately located. However, in most cases you will need to unwind the
pushrod some distance so you can deploy the camera down into a manhole before starting the survey.
To ensure accurate camera distances are recorded in your survey videos and observations, you need to
zero the camera distance when the camera is in position (typically in the center of a manhole) before you
start the survey.
1
Fig. 6-20: Zeroing the camera position.
1
Zero the camera position when the camera is here.
Note: This task is also called 'zero distance' and 'zeroing the rod counter'. Do not confuse this task with
zero calibration of the reel. See the definitions in
page
22.
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