Prime Controls DS600 - One-Point Calibration for Part Present Sensing; Two-Point Calibration for Part Presence Sensing

DS600 Non-Ferrous Double Sheet Detector
This document is confidential and proprietary. No part of this document may be disclosed in any manner
to a third party without the prior written consent of Prime Controls, Inc.
202177 13 Revision M
5. If the calibration is successful, the display reverts to displaying the gauge signal and
calibration is complete
6. If the material is too thick or if the thickness measured at point 2 is very near to the
thickness measured at point 1, the display alternates showing Lo and diFF. To recover
from this condition, follow steps 6 or 7 below.
7. Restart calibration by placing a single thickness sample before the probe and press the
CALIBRATE pushbutton once or momentarily assert external CAL. Go to step 3.
8. Wait 30 seconds and the DS600 reverts to its previous state of gauging.
The gauging thresholds are computed as offsets from the first calibration point value. For the
single/double threshold, the offset is added to Pt1 placing it between the Pt1 and Pt2 values.
The under offset is subtracted from the Pt1 value placing it below the Pt1 value. The size of the
offset is computed as a percentage of the distance from the first calibration point to the second
calibration point. The upper threshold computation is:
Single/Double threshold = Pnt1 + (Pnt2 – Pnt1) x Htol/100
Under threshold = Pnt1 – (Pnt2 – Pnt1) x Ltol/100
The tolerances Htol and Ltol, expressed in percent, may be adjusted through the front panel as
parameters Htol and Ltol respectively. The defaults for these tolerances are 15% for Htol and
100% for Ltol. When Ltol is set to 100%, under gauging is disabled.
Under tolerance checking is available in the DS600P and DS600PC only.
3.5.3 One-point Calibration for Part Present Sensing
To perform a part present 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 the ”part missing” condition (the thinner 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 threshold is 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 computation is:
Threshold = (Cal Pt Value) x (1 - Tol/100)
The tolerance (Tol), expressed in percent, may be adjusted through the front panel as
parameter toL. The default value for single point calibration is 15%.
3.5.4 Two-point Calibration for Part Presence Sensing
To perform a part present 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 sample of the “part missing” material condition in front of the probe face.