Golf Performance Monitors PureFlight
™
Operating Guide
Version 1.3 www.zelocity.com 1-888-ZELOCITY 13 of 21
Customizing the PureFlight
™
for Personal Use
The PureFlight ball flight monitor is calibrated at the factory for general use by golfers.
Built in to this calibration are standard values for local conditions such as:
• Elevation Standard: Sea Level
• Wind Standard: No Wind
• Temperature Standard: 70 deg. F
• Barometric Pressure Standard: 31.9 inches mercury
• Relative Humidity Standard: 70%
Specific conditions and situations may vary from the standard settings used for this
general purpose calibration. In these cases, the CLUB key is useful to increase (or
decrease) the distances reported by the device by a specified percentage or scaling factor.
For example, a golfer practicing at high
elevation notices the ball carries
significantly further than the same shot hit
at sea level (see Effect of Altitude table).
The distances displayed by the PureFlight
with standard settings may be below the
actual distance for this situation. In this
case, the golfer may choose to increase the
displayed distance by a corresponding
amount, using the CLUB key. The actual
amount of the percent scaling factor can be determined using various methods, from very
informal (make an educated guess) to very rigorous (measure actual shot distance using a
tape or surveyor’s wheel).
One method Zelocity has used in our own calibration efforts on driving ranges has been
to move to an open area of the tee line, a safe distance away from other golfers’ shots.
Using our surveyor’s wheel (an alternative would be to pace off the distance), we
measure out to our desired hitting distances and mark every 10 yards using landscaper’s
flags (an alternative might be empty range ball buckets). To see carry distance to the first
bounce, it is also helpful to have someone downrange for better visibility of the exact
spot the ball lands.
Then we hit shots and note each reading on the monitor and the corresponding distance
measured on the range. Some distance variation, plus or minus a small percentage, may
be expected due to variation in golf balls, wind, etc. This exercise, however, is intended
to find significant variation in one direction, such as each shot displaying five yards too
short on a consistent basis. Then, we translate this yardage to a percentage and use the
CLUB key to increase the distance by this percentage. In this example, a 3% increase in
the reported distance requires a CLUB setting of 103%.
Effect of Altitude
Launch Velocity = 150 mph;
Launch Angle = 15 deg; Spin Rate = 3000 RPM
Elevation
(Feet)
Carry Yards Scaling Factor
0 249 Standard
1000 253 + 1.5%
2000 257 + 3.0%
3000 261 + 4.5%
4000 264 + 6.0%
5000 268 + 7.5%
6000 272 + 9.0%
