The User Interface
144
The value entered is derived from the relationship between the shaft encoder and
circumference of the roller to which it is fitted.
This parameter is the number of pulses (ticks) per metre/foot of belt travel. To calculate this
figure for entry into the CTB constant field, use either the following metric or imperial formula:
O
Metric systems
CTB = Encoder pulses per revolution x 100 x
π
x d
Where: d = the diameter of the roller to which the encoder is fitted in millimetres.
O
Imperial systems
CTB = Encoder pulses per revolution x
π
x d
Where: d = the diameter of the roller to which the encoder is fitted in inches. The number
of pulses provided directly relates to the transport speed. JP7 on the detector control
board must be set in position 1-2.
Tap in the field to display a pop-up numeric keypad and enter the CTB constant required.
■
Log speed prob
Because the detector can only work within a predetermined speed range it is possible for the
belt speed to move outside the limit of reliable operation of the machine. Selecting the Log
speed prob option will generate either speed too slow or speed too fast run errors to advise
operators.
Tap in the option check box to enable or disable this option.
■
DSP type
DSP stands for Digital Signal Processing. The following options are available for selection:
O
Off
The resultant signal is based directly on how much the product signal deviates from the
Learnt product reference. Use this option where there is a high level of environmental
noise.
O
Standard
The resultant signal is produced using a tuned detection filter. This is the standard method
of detection for conveyor and pipeline heads. For reactive product the Rate option can give
enhanced performance.
O
Wide
This detection filter is used where the product speed is not known. For example in free fall
and pharmaceutical applications.
O
Rate
This filter is based on how quickly the field changes. This is the recommended option for
reactive product.
Tap the arrow to the right of the field to display the drop down list of available DSP types and
select the one to be used. The PEC fault option, set to Auto Clear, is set by default.
Summary of Contents for IQ3+
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Page 36: ...Safety First 26 THIS PAGE IS INTENTIONALLY LEFT BLANK ...
Page 43: ...Installation 33 ...
Page 60: ...Installation 50 THIS PAGE IS INTENTIONALLY LEFT BLANK ...
Page 70: ...About the Metal Detector Range 60 THIS PAGE IS INTENTIONALLY LEFT BLANK ...
Page 218: ...Operating Instructions 208 THIS IS PAGE INTENTIONALLY LEFT BLANK ...
Page 244: ...Maintenance 234 THIS PAGE IS INTENTIONALLY LEFT BLANK ...
Page 248: ...Glossary 238 THIS PAGE IS INTENTIONALLY LEFT BLANK ...