Appendix 4: Detailed Explanation Of Powder - RCBS MATCHMASTER 98941 Product Instructions

Appendix 4: DETAILED EXPLANATION OF POWDER DISPENSE PARAMETERS (Ex=Example)
A - Powder Size - Powders have different flow characteristics based on their shape and weight. This parameter will
determine the correct transition speed for the Large tube based on the powder size. It also stops the scale short of
the desired target weight, but within tolerance, by the amount listed below for each setting. This is important for
large-heavy powders where a kernel of powder can weigh in excess of 0.07gn.
Ex. if dispensing Lg-Heavy extruded powder where kernel weight is 0.07gn. and target weight is 250.00gn. the scale
will stop if within 0.04gn from target weight, which is 249.96gn. If dispensing were to continue and one kernel was
dispensed the end result would be 250.03gn. which is still within tolerance; however if 2 kernels were dispensed, an
overcharge condition would result.
1=Large-Heavy (Lg. Extruded or Lg. Ball Powders) (0.04 gn from Target weight)
2=Medium (Med-Small Extruded or Med. Ball Powders) (0.02 gn from Target weight)
3=Small (Small Extruded or Small Ball Powders) (0.02 gn from Target weight)
4=Small-Light (Lg and Sm Flake or Small Extruded & Ball Powders) (0.00 gn from Target weight)
Note: The "A" parameter prevents overcharge condition without sacrificing dispense times. If you find that the
dispense weight is consistently short of desired Target weight by 0.02 or 0.04gn, try increasing the Parameter "A"
value.
B - Mode - Sets the dispensing mode to either Standard Mode or Match Mode.
• Match Mode (+/-.04gn) = 0
• Standard Mode (+/- .1gn) = 1
C - Units - Sets the correct units that are to be used.
• Grams = 0
• Grains = 1
D - Large Tube Operation - Controls Large tube operation (1-40).
• If target weight is greater or equal to D the Large tube will Rotate.
• If target weight is less than D the Large tube will Trickle, or will not be used.
• D will normally not need to be adjusted from default setting, unless the target weight is approximately
22 grains or less, and is equal to or up to two units greater than D. This condition can cause an over
charge condition with certain powders. If this happens increase the D parameter to one over the target
weight.
E - Large Tube Stop Point - Controls when the large tube stops from target weight, each division represents
0.5gns. (Range 1-99)
Ex: If E=5, then (5) X (0.5gn) = 2.5 gn.
Large Tube will stop 2.5 gn from target.
F - Small Tube Long Trickle Start - Stop of Small tube constant rotation, each division represents 0.02gns. (Range
0-99);
Ex: if F=20, then (20) x (0.02) = .40gn.
Small Tube Long Trickle operation will start at .12gn from target.
G - Small Tube Long Trickle Operation - Rotation time and response time for long trickle, (G
• G1 = Controls the time of rotation before stop (0-9); where 0=100ms and 9=1000ms)
• G2 = Controls the response time between stop and start of rotation (0-9); where 0=250ms and
9=2500ms)
Ex: Fastest Dispense = (90); Max time of rotation, Minimum response time.
Ex: Slowest Dispense = (09); Min time of rotation, Maximum response time.
H - Small Tube Short Trickle Start - Stop of Small tube Long Trickle, each division represents 0.02gns. (Range 0-99);
Ex: if H=6, then (6) x (0.02) = .12gn.
Small Tube Short Trickle operation will start at .12gn from target.
I - Small Tube Short Trickle Operation - Angle and response time for Short Trickle, (I
• I1 = Controls the time of rotation before stop (0-9); where 0=25ms and 9=250ms
• I2 = Controls the response time between stop and start of rotation (0-9); where 0=250ms and
9=2500ms)
Ex: Fastest Dispense = (90); Max time of rotation, Minimum response time.
Ex: Slowest Dispense = (09); Min time of rotation, Maximum response time.
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, G ). (Range 00-99)
1 2
, I ) (Range 00-99)
1 2