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Pact MKIV XP, User Manual, Page: 11 / 16

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Pact MKIV XP User Manual Download Page 11

 

 

Automatic   Power   Factoring   (APF): 

 

 

With    CHRONO   COMMAND    displayed   on   the   screen   push   the    

PAR  

  button.   The   timer   will   ask   you  

to   “ ENTER   BULLET   WEIGHT   AND   PUSH   SET ”.   Push    2,   0,   0 ,    

SET 

.   Now   press   the    

GO  

  button   and  

chronograph   a   shot.   

 

ES  

105.9   FPS  

AVRG  

763.8   FPS  

 

Remember   that   the   power   factor   for   the   individual   shot   is   displayed,   not   the   average.   

 

4  

  Ballistic   Computer    

(TRAJ) 

 

 

The    Ballistic   Calculator    is   so   easy   to   use   that   you   really   don't   need   much   explanation.   It   does  

however,   have   some   trick   features   that   may   not   be   apparent   on   the   first   pass.   

 

Use   Chrono   Data:  

 

From   “ TIMER   COMMAND ”   press    

TRAJ 

.   The   first   thing   the   Ballistic   Computer   needs   to   know   is  

the   velocity   to   base   the   calculation   on.   If   you're   shooting   at   the   range   it   will   pick   up   the   current  

average   velocity   (which   you   can   override)   from   the   chronograph.   If   none   is   present   in   memory   it  

will    default   to   2500.0   FPS .   

 

Enter   a   Velocity   Manually:  

 

If   you   want   to    change   the   default ,   stay   away   from   the    

SET  

  key   and   first   tell   the   machine   what   it  

needs   to   know.   For   example,   if   you   want   the   machine   to   use   “2650   FPS”   for   its   calculation   just  

type   “ 

2650 

”.   If   you   make   a   mistake   entering   a   number   just   use   the    back   arrow   key    then    

GO  

  to  

erase   it.   When   the   number   entered   is   ok   with   you   hit    

SET  

  and   the   Ballistic   Calculator   will   accept   it  

and   move   to   the   next   screen.   

11  

Summary of Contents for MKIV XP

Page 1: ...lit time and the time that each shot was fired The first shot time will remain at the bottom EXAMPLE El Presidente Drill with Timer Mode Let s say you just fired an El Presidente six reload six you don t bother checking the target you know you shot all A s but you are concerned about how you did in the time department You check the display and it reads 012 37 6 87 on the top line and FIRST SHOT 1 26 ...

Page 2: ...7 and displays 07 1 65 4 54 You see that your reload took 1 65 seconds the time between shot 6 and 7 This time is a little long and you seriously consider switching from your Six Gun to an auto loader Printing from Review If you have one of the HP IR printers you can print the string at any time after you are done firing before or during review by pressing the PRNT key Please note that external pri...

Page 3: ...a number and make a mistake use the back arrow key to delete the incorrect number Push the GO button Each time the shooter fires the timer will display the shot number split time and total time on the top line of the display as before When 1 2 seconds comes around the timer will beep telling you that the time limit has been reached To turn the PAR time off push PAR SET without entering a number Set...

Page 4: ...w when you push the GO button the timer will beep immediately Set Benchmark s The BNCH button activates the PACT Benchmark feature This allows the shooter to program the timer with a series of beeps or cues at specific times after the go signal which allow him to simulate moving and pop up targets EXAMPLE Add benchmark times at 2 3 5 5 and 6 25 seconds Press BNCH YES The timer asks you for a time P...

Page 5: ...r 3 SET The CYCLE DELAY is the time between cadence beeps Push 1 5 SET then the GO button The MKIV XP will give you a start signal beep at 3 seconds then every 1 5 seconds for ever and ever We see this primarily a dry firing tool but you can also use it for live fire You might have it trigger off of the first shot to take the draw time out of some sort of long range Bill Drill practice Keyed Beeps Th...

Page 6: ...n movement stages where the RO runs with the shooter and leaves his finger on the GO button the MKIV XP has a keyboard lockout feature To activate it push the OPTN button until the timer asks Lock out go keys Push YES and the timer will lock its keyboard after the next GO command To reset the timer push the REVIEW key This time the timer asks ENABLE GO KEY Push YES and you re back in business The P...

Page 7: ... RPM button The MKIV XP now displays FULL AUTO CMD Press the GO button Instead of giving you a go beep the timer displays FIRE WHEN READY Fire a fairly long burst of a known number of rounds so you have enough data to be meaningful You ll note that the timer is now displaying you time to the thousandth of a second Press REVIEW and the timer will tell you the number of rounds fired the total time an...

Page 8: ...bility to detect the bullet 9 If shooting indoors you will have to rig an incandescent light over each screen or get our M7 IR Skyscreen Upgrade Kit Connect the SkyScreens to the MKIV XP Plug the first screen into the START plug located on the back of your timer and the second screen into the STOP plug Switch the timer on from TIMER COMMAND push the CHRN button The timer will switch to CHRONO COMMA...

Page 9: ...ot When you are done with your string the MKIV XP will provide you with a statistical summary of your string If you have a printer just push the PRNT key and you will receive a hard copy of you string number statistical summary and each shot In addition all chrono data is held in memory for download to your PC Push REVIEW to review the desired string If you want to look at the most recent string p...

Page 10: ...t velocities AVRG is obviously the average velocity of you string At this point you can continue to press the review key and review each shot The FIND SHOT function is identical to counterpart in timer mode ES 105 9 FPS AVRG 763 8 FPS You can EDIT out individual bad shots with the NO button during review The MKIV XP will recalculate your statistical summary less the edited shots When you are done ...

Page 11: ...a From TIMER COMMAND press TRAJ The first thing the Ballistic Computer needs to know is the velocity to base the calculation on If you re shooting at the range it will pick up the current average velocity which you can override from the chronograph If none is present in memory it will default to 2500 0 FPS Enter a Velocity Manually If you want to change the default stay away from the SET key and fir...

Page 12: ...e Ballistic Calculator will now ask you for the Ballistic Coefficient BC This is always a decimal number but the Ballistic Calculator is smart enough to add the decimal if you forget it Enter a BC of 475 and press SET NOTE The Ballistic Calculator will only produce correct results with C1 ballistic coefficients This is the industry standard and is what you will find in every bullet manufactures curre...

Page 13: ... more than so many inches above or below the line of sight This option is strongly recommended for field marksman hunters and warriors The default value is a six inch vital zone This means that you ll end up with a zero that keeps the bullet within an imaginary six inch tube three inches above to three inches below the line of sight from the muzzle to the maximum point blank range The Ballistic Cal...

Page 14: ...n to advance from screen to screen To make another print out just push TRAJ again All of the parameters you used on the last print out will appear as defaults assuming you did not turn the machine off speeding data entry 5 Additional Functions Send Shot Data to PC Send To PC is the first question asked under the OPTN button It will activate the USB port on the back of the unit In order to utilize t...

Page 15: ...riation in the performance of ammo due to weather conditions We recommend that you give yourself at least a 25 fps cushion 50 fps would be better The skyscreens just eat batteries such are the laws of physics Whenever the screens are plugged in the Chronograph detection circuit is on When you are done chronographing unplug the screens Troubleshooting Many light sensitive chronographs have a reputa...

Page 16: ... blast does Keep the muzzle a 5 10 ft back from the first skyscreen to keep from beating it up Remember that the farther your screens are from the muzzle the lower the velocity your chronograph will read the bullet starts slowing down as soon as it leaves the barrel If you ever have a problem with your MKIV XP that you can t resolve please don t suffer in silence Go to our support section of our we...

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