11
3.
CALCULATING "GRAN CAL"
Factors which can affect the product GRAN CAL numbers are the product particle
size, density, temperature, and humidity. Always calibrate the material you have
purchased. Complete INITIAL CONSOLE PROGRAMMING, on
page 15
, before proceding
with this procedure. The GRAN CAL value is derived using the following procedure:
1)
1)
1)
1)
1)
Place chalk mark or tape on granular belt shaft to use as a reference point.
2)
2)
2)
2)
2)
Mark initial spot on the shaft in a convenient location.
3)
3)
3)
3)
3)
Turn granular belt on, and allow to turn until a uniform amount of granular is
being applied.
4)
4)
4)
4)
4)
Catch the granular from the belt for a period of 10 revolutions of the granular
belt shaft.
5)
5)
5)
5)
5)
Weigh the amount of granular that was caught (lbs) [kg].
6)
6)
6)
6)
6)
Divide 18,000 by this number. This is your GRAN CAL number. Write this number
down for future reference.
EXAMPLE:
EXAMPLE:
EXAMPLE:
EXAMPLE:
EXAMPLE:
Weight of material caught = 90 lbs [40.8 kg]
ENGLISH UNITS:
ENGLISH UNITS:
ENGLISH UNITS:
ENGLISH UNITS:
ENGLISH UNITS:
METRIC UNITS:
METRIC UNITS:
METRIC UNITS:
METRIC UNITS:
METRIC UNITS:
GRAN CAL = 18,000 = 200
18,000 = 441
90
[40.8]
GRAN CAL = 200 [441]
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: This measurement is critical to the accuracy of the system.
.
.
.
. MEASURE
MEASURE
MEASURE
MEASURE
MEASURE
CAREFULLY
CAREFULLY
CAREFULLY
CAREFULLY
CAREFULLY. For best results, measure several times and average the
results. If for any reason the amount of granular on the belt changes
(i.e. the granular gate height is adjusted), the GRAN CAL number will
be invalid, and must be measured again.
