RCBS AmmoMaster Chronograph - Manual (Page 8)

Average Velocity
displays the statistical average of the recorded velocities within an
existing shot string.
Extreme Spread
displays the difference between the highest and lowest velocity readings.
Standard Deviation
Standard deviation (S.D.) of a string is a measure of uniformity of the
data. it essentially tells you how much scatter is present in the data set
relative to the average velocity. The smaller the number is, the better
your data’s uniformity. A standard deviation of zero would mean that
every velocity was identical. An S.D. value approximates that 68% of
data will fall within ± 1(S.D.) of the Avg. velocity, 95% of all recorded
velocities will fall within ± 2(S.D.) of the Avg. velocity, and 99% of all
recorded velocities will fall within ± 3(S.D.) of the Avg. velocity.
Example: Let’s say we have a full shot string of 10 shots. From pushing
the Stats button we find the following information:
High Velocity: 3100 f/s
Low Velocity: 3000 f/s
Avg. Velocity: 3050 f/s
Extreme Spread: 100 f/s
Standard Deviation: 10 f/s
With a standard deviation of 10 f/s, the worst anyone can expect is that
99% of the shot velocities are within ± 3(S.D.) of the Avg. Velocity or
3050 ± 30 f/s. , which equates to 3080 f/s to 3020 f/s, respectively.
BATTERY INFO
The AmmoMaster ® Chronograph operates using a 9V battery.
We recommend using high quality batteries for optimal performance.
A good alkaline battery life under nominal lighting conditions should
last approximately 5 – 6 hours.
REPLACEMENT PARTS
Should you accidentally shoot your chronograph (and most people who use
them long enough eventually will), just call us to order replacement parts.
The following replacement parts are available for purchase from RCBS:
Skyscreens
# 81193
Diffusers # 81192
Side Supports (2 pack) # 81191
LIMITED WARRANTY
your AmmoMaster ® Chronograph is warranted to be free from defects
in material or workmanship for one year from the date of purchase.
This warranty is extended only to the original consumer purchaser.
All RCBS products are intended for non-commercial use by hobbyists.
Any other use of these products will void the warranty. Should you
believe that your AmmoMaster Chronograph is defective in material
or workmanship, you must return the AmmoMaster Chronograph to
Ammunition Accessories Inc. through its Oroville operation (hereinafter
“Oroville Operations”) postage paid, for evaluation. If defective, the
product will be repaired or replaced at oroville operations’ option, at
no charge.
Send a dated proof of purchase to oroville operations for return shipping
and handling, along with the defective product or parts to:
Ammunition Accessories inc., oroville operations
605 Oro Dam Blvd East
Oroville, California 95965
Warranty services cannot be provided without meeting the above
requirements.
To enSuRe ACCuRACy of youR WARRAnTy infoRMATion, Send
youR WARRAnTy CARd To:
Ammunition Accessories inc., oroville operations
605 Oro Dam Blvd East
Oroville, California 95965
ThiS one yeAR liMiTed WARRAnTy doeS noT CoVeR defeCTS oR dAMAge
ReSulTing fRoM: CAReleSSneSS, MiSuSe, CoMMeRCiAl uSe, ABuSe, iMpRopeR
inSTAllATion, ModifiCATion, oR noRMAl WeAR And TeAR. The iMplied WARRAnTieS
of MeRChAnTABiliTy And fiTneSS foR A pARTiCulAR puRpoSe ARe liMiTed To The
duRATion of ThiS one yeAR liMiTed WARRAnTy. oRoVille opeRATionS iS noT liABle
foR dAMAgeS in eXCeSS of The puRChASe pRiCe of The pRoduCT And undeR no
CiRCuMSTAnCeS ShAll oRoVille opeRA TionS Be liABle foR ConSeQuenTiAl oR
inCidenTAl dAMAgeS. hoWeVeR, SoMe STATeS do noT AlloW liMi TATionS on
inCidenTAl, oR ConSeQuenTiAl dAMAgeS, So The ABoVe liMiTATion oR eXCluSion
MAy noT Apply To you.
dAMAge To The uniT CAuSed By BulleT iMpACT iS noT CoVeRed undeR
WARRAnTy.
The above warranty provides the sole and exclusive warranty available to the customer
in the event of a defect in material or workmanship in the AmmoMaster ® Chronograph.
This warranty gives you specific legal rights, and you may also have other rights which
vary from State to State.
8 RCBS AmmoMaster ® Chronograph Instructions
RC119 9060