3RG72563NQ00PF Distance sensor 06813787 / 453489 Stand: 03/2011
Mounting and
operating instructions
36
Automatic centre mode
The output characteristic curve 4 – 20 mA is displaced with this function. When the automatic centre function is
activated and Q
1
= +U
B
, the current measured value is equated with the output value of 50% = 12 mA. The incline of
the characteristic curve is maintained and the minimum and maximum values of the characteristic curve are limited
by the measuring range.
The distance to the object must be within the measuring range.
Autom. centre at 400 mm
Analogue signal
Maximum hold mode
When maximum hold mode is activated and Q
1
= +U
B
, this function detects the maximum value of the measuring
signal and stores it.
If Q
1
= U
B
, the last maximum value is transmitted at the analogue output.
Example of use: determining the maximum value of a shaft
The minimum value can be determined by inverting the analogue output characteristic (see function no. 16 and 17).
Analogue value
Analogue output
Q
1
= +U
B
= Sample. Collect measured values
Q
1
= U
B
= Display. Last maximum of analogue signal at
analogue output
A
A
B
B
A
B
100% (20 mA)
50% (12 mA)
+U
B
U
B
Q
1
t(s)
0% (4 mA)
100% (20 mA)
50% (12 mA)
0% (4 mA)
250
400
750
mm
500
100% (20 mA)
+U
B
U
B
Q
1
0% (4 mA)
100% (20 mA)
0% (4 mA)
14 mA
8 mA
1
1
2
2
1
2
Illustr. 13
15500146
Illustr. 14
15500145
Illustr. 15
15500153
