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PROCHRONO LTD 

U S E R   M A N UA L   /   O P E R AT I N G   I N S T R U C T I O N S

LIMITED WARRANTY
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COMPETITION ELECTRONICS, INC. warrants the ProChrono LTD manufactured by it to be free from 

defects in material and workmanship for a period of 2 years from date of purchase by the original pur-

chaser for use. COMPETITION ELECTRONICS, INC., at it’s option, will repair or replace without charge, or 

refund the purchase price of, any product which fails during the warranty period by reason of defect in 

material or workmanship found upon examination by COMPETITION ELECTRONICS, INC. to have been 

the cause of failure. This warranty does not cover any failures attributable to abuse, mishandling, and 

failure to follow operating instructions, alteration or accident.

To make a claim under this warranty, the purchaser must return the product to COMPETITION ELEC-

TRONICS, INC. at the address shown above, properly packed and with shipping charges prepaid. All 

claims must be made within 30 days after the product failure, and in any event, within 30 days after the 

expiration of the 2 year warranty. All claims must be accompanied by the sales receipt or other written 

proof of date of purchase.

TO THE EXTENT PERMITTED BY LAW, ANY AND ALL IMPLIED WARRANTIES, INCLUDING MERCHANT-

ABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE EXCLUDED. ANY IMPLIED WARRANTIES NOT 

EXCLUDED ARE LIMITED IN DURATION TO 2 YEARS FROM DATE OF PURCHASE. INCIDENTAL AND 

CONSEQUENTIAL DAMAGES ARE EXPRESSLY EXCLUDED FROM THE REMEDIES AVAILABLE TO THE 

PURCHASER, AND THE REMEDIES PROVIDED IN THIS WARRANTY SHALL BE EXCLUSIVE TO THE EXTENT 

PERMITTED BY LAW.

(Note: Some states do not allow limitations on how long an implied warranty lasts or the exclusion or 

limitation of incidental or consequential damages, so the foregoing limitations and exclusions may not 

apply to you. This warranty gives you specific legal rights, and you may also have other rights which 

vary from state to state.)

If any product returned by the purchaser is found by COMPETITION ELECTRONICS, INC. to require 

service not covered by warranty, COMPETITION ELECTRONICS, INC. will so advise the purchaser and 

request further instructions.

COMPETITION ELECTRONICS, INC. will recondition to working order any ProChrono LTD returned to it 

regardless of condition, upon the purchaser’s remittance of payment of ½ of current retail price, if it is 
still manufactured by COMPETITION ELECTRONICS, INC.

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SERVICE FOR YOUR PROCHRONO LTD

For assistance with your Pro Chrono LTD, use the information below.

Competition Electronics, Inc . 

3469 Precision Dr . 

Rockford, IL 61109

Phone: 

815-874-8001        

Fax: 

815-874-8181         

www.competitionelectronics.com

Summary of Contents for ProChronoLTD CEI-3825

Page 1: ...ease read this manual This manual contains setup information necessary to achieve proper performance from your chronograph OPERATING INSTRUCTIONS Look inside for accessories to use with your ProChrono LTD ...

Page 2: ...g Projectile Velocities 9 Duplicate Velocities 9 Low Battery Indication 9 Error Indication 9 Working with Projectile Velocities Statistics 10 Pushbutton Controls 10 11 Specifications 12 Limited Warranty 13 Accessories 14 Thank you for purchasing our product It is important to read and understand this manual before trying to use your new chronograph We are here to help If you have any questions or ...

Page 3: ... it on its LCD screen Lighting Considerations Lighting Conditions As mentioned above the ProChrono LTD is a light sensing device In the course of use it must cope with a multitude of different lighting conditions sunny clear skies overcast days low light situations reflections different colors and shapes of projectiles etc Although the ProChrono LTD works flawlessly over a very wide range of condi...

Page 4: ...a location in the field of a shadow cast by a building or an opaque wall Make sure the sensors have a clear view of the sky but the chronograph itself is within the shadow An alternate method for this is to use shields taped on the sides of the guide rods to create the shadow Be sure to use cardboard or something similar that will not cause any problems with ricochets This will eliminate reflectio...

Page 5: ...as an incandescent flood lamp shining up onto a white surface above the chronograph Wrong Kind of Light Florescent lamps will not work as a light source for your chronograph because although we cannot see it with our naked eye they are pulsing many times per second and the chronograph can detect this which renders it useless because the cycle rate is similar to the speed of projectiles If you woul...

Page 6: ...ting conditions or they may be hit by the shot mass Due to the size and shape of a shot mass diffused 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 find the right spot to measure your particular load If you stand too far away t...

Page 7: ...e ProChrono LTD will measure them reliably Miscellaneous You may think of other uses for the chronograph For example some have used it to measure the speed of sporting clays If you can get it to pass over the sensors you can probably measure the velocity Battery Installation Begin by installing a new 9 volt alkaline battery in the chronograph battery compartment There is also space to store a spar...

Page 8: ...raph to the ON position The display will briefly show all segments Meters per Second Feet per Second Selection If you want to use the chronograph in ft sec mode just turn it on To register velocities in meters sec mode hold down the review button while you turn on the chronograph until you see the rdY message You must do this each time you turn on the chrono when meters sec readout is desired Proj...

Page 9: ...uP duplicate message will appear Fig 1 followed by a single digit number representing the duplicate velocity If subsequent shot velocities are also the same the number will increment If 10 sequential duplicate shot velocities are recorded the number will be reset to 1 Low Battery Indication If the battery voltage becomes low 6 8 7 0 volts the chronograph will flash the message bAt at intervals to ...

Page 10: ...f at the end of shot string 1 and displays the most recent shot velocity By pressing the String Change button the user can sequentially select each one of the 9 string memories into which the unit will place the shot velocities as they are detected When shot string 9 is selected pressing the String Change button will increment back to string 1 Review Shots and Statistics for a String The Review bu...

Page 11: ...a velocity it can be deleted by pressing the Delete Shot button When you do this the ProChrono LTD will delete the currently displayed velocity renumber all the shot velocities above it in the string and reposition the display to the last velocity It will redisplay the velocity number which has been decreased by 1 due to the deletion just performed Statistics will be recalculated minus the deleted...

Page 12: ...uide Wire Size Memory Capacity Minimum Time Between Shots Shot Timing Resolution Accuracy 20 9 999 feet per second 20 100 degrees Fahrenheit 16x4x3 1 4 inches 2 1 lbs One 9 volt alkaline battery Approx 20 hours of operation Approx 20mA 1 4x20 3 16x16 inches Up to 9 strings of up to 99 shots each 500 mSec 31 nSec 8000 counts 4 000fps Crystal Controlled 5 of measured velocity or better ...

Page 13: ...RRANTIES INCLUDING MERCHANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXCLUDED ANY IMPLIED WARRANTIES NOT EXCLUDED ARE LIMITED IN DURATION TO 2 YEARS FROM DATE OF PURCHASE INCIDENTAL AND CONSEQUENTIAL DAMAGES ARE EXPRESSLY EXCLUDED FROM THE REMEDIES AVAILABLE TO THE PURCHASER AND THE REMEDIES PROVIDED IN THIS WARRANTY SHALL BE EXCLUSIVE TO THE EXTENT PERMITTED BY LAW Note Some states do not...

Page 14: ...om flying debris and paint However we offer no guarantee that it will protect your chronograph from damage This item is shipped with a protective film to be removed before use Replacement Diffusers Model CEI 2526 Replacement set of four guide wires and two diffuser hoods for outdoor use on sunny days Padded carrying case Model CEI 4715 This handy case will protect your chronograph during transport...

Page 15: ...15 PROCHRONO LTD USER MANUAL OPERATING INSTRUC TIONS ...

Page 16: ...OPERATING INSTRUC TIONS November 2019 www competitionelectronics com ...

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