Prime Controls DS600 - One-Point Calibration for Single;Double Sensing; Two-Point Calibration for Single;Double Sensing

DS600 Non-Ferrous Double Sheet Detector
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to a third party without the prior written consent of Prime Controls, Inc.
202177 12 Revision M
3.5.1 One-point Calibration for Single/Double Sensing
To perform a single/double one-point calibration:
1. For DS600P and DS600PC controllers, select the desired memory location for the
calibration (See Calibration Save and Recall, page 14)
2. Place a single thickness of the sample material in front of the probe face.
3. Press and release the CALIBRATE pushbutton once or apply a single momentary signal
to the external CAL terminal. The display alternates CAL and Pnt1 until calibration is
complete.
The gauging thresholds are computed as an offset from the signal value captured during
calibration. The size of the offset is computed as a percentage of the gauge value at Pnt1. The
threshold computations are:
Single/Double Threshold = (Cal Pt Value) x (1 + Htol/100)
Under Threshold = (Cal Pt Value) x (1 – Ltol/100)
The tolerances Htol and Ltol, expressed in percent, may be adjusted through the front panel as
parameters Htol and Ltol respectively. The Htol setting defaults to 50%. However, for greatest
reliability in sensing doubles over the thickness range of 0.001” (0.025mm) to 1.14” (3.5mm),
the settings specified in the table below are recommended.
Material & Thickness Range Htol Setting for Double Discrimination
Al .001” (.025mm) through .040” (1.0mm) 40%
Al .041” (1.1mm) through .100” (2.54mm) 20%
Al greater than .100” (2.54mm) 15%
Stainless Steel .001” (.025mm) through 1.40” (35.5mm) 30%
Ltol defaults to 100%. When Ltol is set to 100%, under gauging is disabled.
Under tolerance checking is available in the DS600P and DS600PC only.
3.5.2 Two-point Calibration for Single/Double Sensing
To perform a single/double two-point calibration:
1. For DS600P and DS600PC controllers, select the desired memory location for the
calibration (See Calibration Save and Recall, page 14)
2. Place a single thickness of the sample material in front of the probe face.
3. Quickly press and release the CALIBRATE pushbutton twice within one second or apply
two momentary signals to the external CAL terminal. The display alternates CAL and
Pnt1.
4. Wait for the display to change to CAL and Pnt2 then add a second material sample in
front of the probe face and press and release the CALIBRATE pushbutton or apply a
momentary signal to the external CAL terminal.