Maguire Products Weigh Scale Blender WSB, Operation & Maintenance Manual

Page: 76 / 99

M A G U I R E P R O D U C T S , I N C .
Edition: August 6, 2014
76
W E I G H S C A L E B L E N D E R
®
Normal Operating Sequence
This section tells you how the system is supposed to work. If your system is not operating correctly, this description
may help you spot exactly where the system is failing, providing a clue to the problem.
Turn POWER ON:
The current program version date (V=xxxxxT) is displayed for 1 second, followed by the check
sum number (CKS xxxx), followed by a ROM check (ROM OK ), followed by a display of ( 0).
The weight in the weight bin is now displayed. It should be 0 plus or minus several grams.
During the first few minutes of operation, the displayed weight readings may drift slightly as the
circuitry warms up.
BEGIN operation:
The unit will begin to operate if both switches on the left side are UP in the CONTINUE position
and the SENSOR in the mix chamber is UNCOVERED. The sensor must be plugged into the
right side of the controller. If it is not, this has the same effect as the sensor being covered; the
unit will not run.
If the WEIGH BIN DUMP Flap opens and closes repeatedly:
If initial empty bin TARE weight is 100 grams or more, the weigh bin dump valve will operate in
an attempt to empty the bin and bring the starting weight closer to zero. If the bin is empty but the
weight reading is greater than 100 grams then something is wrong. See TESTING the LOAD
CELLS and LOAD CELL CALIBRATION.
If the ALARM flashes:
If the initial TARE weight is below -50 grams the Alarm will flash and the unit will not operate. Go
to TESTING of LOAD CELLS and LOAD CELL CALIBRATION.
The DISPENSE sequence begins:
If initial tare weight is within limits, between -50 and +100, the sequence will begin.
DISPLAY during dispenses:
During all dispenses, the component number and Type letter (R,N,A) will be displayed indicating
which component is being dispensed. The INITIAL display is the tare weight of the bin. This will
not change during the first dispense. After each dispense, the new total weight of the material in
the bin is updated and displayed.
REGRINDS first:
If REGRIND is part of the blend, REGRIND dispenses will occur first in order of size, from
the largest to the smallest. The letter "R" will appear in the display. After these dispenses an
exact weight is taken to determine the space remaining in the weigh bin for the remaining
dispenses. The total bin weight will appear in the display 2 seconds AFTER each dispense
has ended.
NATURALS second:
The NATURAL dispenses occur next in the sequence. They will be dispensed in order of
size, largest to smallest. The letter "N" will appear in the display. The exact weight of all
NATURAL dispensed is now determined for calculating the ADDITIVE dispenses.
ADDITIVES third:
The ADDITIVE dispenses occur last in the sequence. Each dispense must meet
requirements set by internal parameters or RETRIES will occur and the sequence will not
continue.
MATERIAL RUNS OUT:
If any material runs out or is not enough to meet criteria set by parameters then the process