Competition Electronics ProChrono DLX - Using the Prochrono DLX with Different Projectile Types

PROCHRONO DLX
USER MANUAL / OPERATING INSTRUCTIONS
6
Using the ProChrono DLX with Dierent
Projectile Types
Pistols & Rifles
The main consideration here is probably muzzle blast. Make sure you stand back
far enough from the chronograph to avoid the muzzle blast triggering the sensors
and introducing velocity errors.
• For pistols, the muzzle to chronograph distance should be 5 to 10 feet.
• For ries, we recommend a muzzle to chronograph distance of 10 to 15 feet.
If muzzle blast is aecting your readings, move back to resolve the problem.
If you are using a scope, be sure to check the boreline-to-scope distance and raise
your aimpoint to accommodate this measurement, otherwise the projectile may
hit the chronograph.
Shotguns
To chronograph shotgun loads, do not install the guide wires and diuser hoods
under any type of lighting conditions or they may be hit by the shot mass. Due to
the size and shape of a shot mass, diused light is not necessary.
Start by standing at a distance of 5 feet from the muzzle of the gun to the
chronograph and aim about 6 inches above the unit.
You may have to experiment with shot placement and muzzle distance to nd the
right spot to measure your particular load. If you stand too far away, the shot can
spread out too far causing inaccurate velocity readings, and the wad can separate
from the shot column and may hit and possibly damage the chronograph.
See the CEI Debris Shield in the accessories section of this manual, it can provide
an additional measure of protection.
Bow and Arrow & Crossbow
Make sure that you stand a little more than one arrow’s length away from the
chronograph when shooting to assure that the arrow is not accelerating when it
reaches the chronograph, otherwise your velocity readings may be inconsistent.
Regarding the arrow tips, we recommend using dark colored eld points for best
results.