WeighTech MicroWeigh - Calibration Procedure Steps; Entering and Performing Calibration

tolerance settings and the target weight. For example, if the target weight is 10 pounds,
the tolerance low setting is 0.5 pounds, and the tolerance high setting is 1.0 pounds,
the acceptable weight range will be from 9.5 (target-low) pounds to 11 (target+high)
pounds.
7.6 Dump Cycle
• Shut the weigh hopper, open the buffer hopper, retract the bag openers, and turn
on the infeed to fill the hopper. (“Fill”)
•
Once the hopper weight exceeds the target weight or dump limit setting, start the
overfill timer. If the bag opener is enabled, open the bag. (“Over”)
• When the overfill timer expires, shut the buffer hopper, start the line stop timer,
and start waiting for the hopper weight to stabilize. (“Weigh”)
• Hopper weight has stabilized. Wait for the dump switch to be pressed (if required
by the “Dump sw” setting) and check that the weight is inside the tolerance band
(if tolerancing is turned on). (“Pre”)
• Open the weigh hopper and add the dump weight to the statistics. Start waiting
for the hopper weight to fall below the zero threshold setting. (“Dump”)
• After the weigh hopper weight drops below the zero threshold setting, start the
empty timer. (“Empty”)
• The empty timer has expired. Shut the empty weigh hopper and calculate the
next dump weight if batching. If the bag opener is enabled, retract it. If the dump
autozero setting is enabled, start the zero timer and begin waiting for a stable
weight or for the zero timer to expire. (“Zero”)
• Either the empty hopper weight stabilized for autozero or the zero timer expired.
Cancel line stop timer, open the buffer hopper, and return to the fill portion of the
dump cycle. (“Hold”)
8 Calibration Procedure
8.1 Entering the calibration menu
With the indicator on and displaying weight, touch the “Menu / Help” key. The display
will read “Power off *”. Use the up / down arrows until the display reads “Calibrate
*”. Touch the “Print / Enter” key and the display should then show “Password”. At
this point key in the calibration password. (The default calibration password is “Zero”
“Zero” “Zero” .)
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