Manual
Double Sheet Detector R1000 series UDK20
B0048991 / Rev. 1.3
Technical data
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15
2.4
Sensor performance data (Measuring time) for ferrous (FE) material
In the following diagram the response time of the control unit for measurement is shown depending
in number of sensors activated by the program. In addition the response time depends on the
selected system parameter “Measure”, the actual sheet thickness, the nominal sheet thickness
and the upper limit (up).
System parameter „Measure“
•
„fast“
The
actual
response time depends on the measured sheet thickness, the nominal thickness
and the upper limit (up).
The
maximum
response time is limited by the nominal thickness and the upper limit (see
diagram and example).
Advantage: maximum response time is low.
Disadvantage: In case of measuring results larger than the double sheet threshold, the text
“2-sheet” is issued instead of the actual measurement value.
•
„normal“
The
actual
response time depends on the measured sheet thickness.
The
maximum
response time corresponds to the maximum sheet thickness.
Example 1:
•
System parameter “Measure:
fast
”
•
Measurement with one sensor
•
Nominal thickness 1.0 mm = 100%
•
upper limit (UP) 120% (=1.2 mm)
Actual
sheet thickness = 1 mm
actual
response time
= 58 ms
Actual
sheet thickness = 2 x 1 mm
actual
response time
= 62 ms
Actual
sheet thickness = 7 x 1 mm (sensor on stack)
actual
response time
= 62 ms
The
maximum
response time is 62 ms (with “up“ = 120%). This means that after the signal "measurement start" was issued
(max. 30ms), it will take 62 ms until the result of the measurement is available as output signal (with “up“ =120%).
Example 2:
•
System parameter “Measure:
normal
”
•
Measurement with one sensor
•
Nominal thickness 1.0 mm = 100%
•
upper limit (UP) 120% (=1.2 mm)
Actual
sheet thickness = 1 mm
actual
response time
= 58 ms
Actual
sheet thickness = 2 x 1 mm
actual
response time
= 68 ms
Actual
sheet thickness = 7 x 1 mm (sensor on stack)
actual
response time
= 80 ms
The
maximum
response time is 80 ms (with “up“ = 120%). This means that after the signal "measurement start" was issued
(max. 30ms), it will take 80 ms until the result of the measurement is available as output signal (with “up“ =120%).
Note
The advantage in measuring time is significant, if the thickness of material
is considerably lower than the measuring range of the sensor.
