Conair WSB - Manual (Page 51)

digits (FCV 000xx). If your unit is equipped with a Flow Control
Valve, under the mix chamber, it is programmed to open whenever the
sensor is covered. It will close again immediately when the sensor is
uncovered. This assures that material has time to mix before dropping
into a bin below. When a batch is dropped into the mix chamber the
sensor is covered. To prevent unmixed material from dropping
immediately out the bottom, the mix valve is delayed for a time to
allow mixing to occur first. This parameter controls the time that the
Mix Chamber Valve remains closed after a batch has been dropped.
The primary function of the valve is to assure mixing. As such it
seems best to keep as high a level as possible in the mix chamber.
However, if the chamber gets too full (over the blades), mixing is not
as good. To allow the chamber to empty to a lower level after the
sensor is uncovered, we can also DELAY the CLOSING of the flow control
valve. This is done by using the 2nd and 3rd digits (FCV 0xx00) to
specify a delay time. (FCV 00206) delays closing by 2 seconds.
If the first digit is set to a 1 (FCV 10006), the signal output to
the air solenoid is reversed. Normally, the computer puts out a
voltage to open the valve. With this flag set the computer puts out a
voltage to close the valve. For this reverse logic to work correctly,
you must reverse the air lines to the flow control valve air cylinder.
Normal power-off position for the valve is closed. Some customers
prefer the valve open when all power is off. This option allows this
reversed "power off" position. With power on, no difference is
apparent.
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DTI (probably no need to ever change this)
DTI is the maximum TIME allowed for the weighing bin to dump at
the end of the cycle. The software will close the bin earlier if it
detects no weight change occurring. This time determines the maximum
time that is allowed for the bin to empty. We set this maximum time
limit according to the model and batch size.
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KDF / WDF (change only if you have an extreme vibration problem)
KDF / WDF is the maximum acceptable variation in GRAMS between two
consecutive weight readings. One weight reading requires 1 second of
time. Two readings are always taken and they must be within WDF grams
of each other to be accepted as valid. Readings are taken continuously
until two consecutive readings meet the criteria. This prevents a
single accidental bump of the scale from causing a grossly inaccurate
reading.
WDF is used for starting tare weight, and each component dispense
weight. KDF is used for Load Cell calibration weights.
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BER
BER is the BAILOUT ERROR weight. Dispenses are controlled by very
accurate timing. However, as a precaution, the weigh bin is constantly
monitored during each dispense. If bin weight is found to exceed
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