5.3 Zero Procedure
To zero the indicator touch the “Zero / On” key and the indicator will take a new zero.
If the current weight reading is unstable, under capacity, or over capacity, no new
pushbutton zero will be established.
5.4 Units Procedure
To change the units of measure touch the “Units / Cancel” key. The units will change
between pounds, kilograms, grams and ounces (assuming all the units are enabled in the
“Parameter” menu) each time that the key is touched.
5.5 Tare Operation
Press and hold the tare button to establish a pushbutton tare reference. If a valid tare is
established, the indicator will switch to the net weight display. If the gross weight is
equal to or less than gross zero, any existing tare value will be cleared, the display will
show “Tare cleared” for about one second, and the display will revert to gross weight
display.
Toggle between net and gross display modes by touching the “Tare” button. If no
tare reference has been established, the indicator will not switch to net weight mode.
An arbitrary tare weight can be entered from the tare setting in the main menu
(keypad tare). Scroll and select digits one at a time to enter the desired value. The
indicator will not accept a keypad tare value in excess of scale capacity, or less than
zero. Entering a value of zero will clear any existing tare and return the indicator to the
gross weight display mode. Units for the entered weight is the same as the currently
displayed units. (To enter a six pound tare, be sure that the display is showing weight in
pounds before entering the keypad tare.)
6 Machine Setup
•
After the machine has been wired and plumbed, turn on the air supply and turn
off the Microweigh control indicator. The buffer hopper (top hopper) and weigh
hopper (bottom hopper) should both be open, the infeed belt (if controlled by
the system) should be running, and all knockoff gates should be retracted. Any
cylinder in the wrong position is probably plumbed incorrectly. Press the small
silver pilot on each pneumatic solenoid valve in turn to check that the cylinders
move freely and that there are no air leaks.
•
Turn on the indicator. No gates should move. Put the indicator in the cycle off
mode (“Production”/“Cycle Off”). The buffer hopper and weigh hopper gates
should both shut, and the infeed belt should turn off (if controlled by the system).
If not, check the wiring, modules, and jumper configuration.
•
Next, put the indicator in cycle on mode (“Production”/“Cycle On”). The weigh
hopper gate should close, the buffer hopper gate should open, and the infeed belt
8
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