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
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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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