User's Manual

Manual MN71-082 Rev - 12

Acquisition Details

Positioning

A good survey requires accurate and repeatable positioning. There are three ways we try to help.

1) Mark your starting position in a way you can refer to, either with tape of spray-paint of a stick

etc. The starting line on our antenna is the forward-most line marked on top of the antenna

arrays. On this line, the position of the right-most antenna is the defined as (0,0) (Figure 7). It

is best to plan your survey with this in mind, especially if you want to make multiple passes

and tile them all together in our Super3D Mode.

Figure 7: Data Orientation relative to cart.

Backing up (other than being difficult with a trailed cart) is not a problem. During data

collection, the survey wheel will remember its last forward progress and continue once you

return to this point.

However, making turns must be done with full knowledge that the survey wheel is only on

one side of the cart. Therefore, when measuring a distance to a pipe, you MUST measure

along the track of the survey wheel, not along the center of the cart. This also means that our

displayed distance of a survey will be longer for a right turn and shorter for a left turn. If this

is fatal problem, our standard survey wheel can always be attached and dragged directly

behind the antenna and connected to the units.

2) Make sure your Survey Wheel is calibrated properly. This procedure, once done carefully,

should not need to be repeated (unless tire pressure changes, or you decide to switch units

Metric/English).