Pro-Form XT 70 User Manual download pdf (Page 29)

GPX Pro 24

1.4.1 Basic Operation

In Drag Racing mode, you can select from the following types of drag race via the menu item Type

of drag race:

Distance: 1/8 mile; ¼ mile; 1 mile; 1000 feet

Top speed: 0-30 mph; 0-60 mph; 0-100 mph; 0-60 km/h; 0-80 km/h; 0-100 km/h; 0-120 km/

h; 0-160 km/h; 0-200 km/h; 0-300 km/h

To top speed and stop: 0-30-0 mph; 0-60-0 mph; 0-100-0 mph; 0-60-0 km/h; 0-80-0 km/h; 0-

100-0 km/h; 0-120-0 km/h

“Roll-on” (e.g., 60-100 mph)

In addition, for each race type (except roll-on), you can select how you will start the session via

the menu item Drag race starting method: “Standing Start" (timing starts whenever the vehicle

starts moving), or “Tree lights” (you start after a brief cycling of red to yellow to green) and the

reaction time is recorded. There is no “track” for drag racing. You can do it anywhere.

To start a drag race (after you have selected the type

of race and starting method), press Select from the

main menu.

For a few seconds, the GPX will “zero out” the internal accelerometers. Then either you can start

when you’re ready ("Standing start"), or start when the tree lights go green.

NOTE: The internal accelerometers are extremely sensitive.

Especially for drag racing, you should mount the GPX in such a

way as to minimize vibration.

During the 0-30-0-type races, the display of the GPX will invert (i.e., reverse black and white)

when you hit the top speed. This is the indication that you have hit the maximum speed and

need to start the deceleration (braking) portion of the drag.

Similarly, during a roll-on, the display of the GPX will invert when you hit the minimum speed (e.

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Pro-Form XT 70 User Manual Page 29