34
von 61
34
von 61
7.2.2. Potentiometric sensors
The following options can be selected when using potentiometric sensors:
Potentiometric sensors
Excitation
5 V
Sensor excitation voltage
The correct value for the sensor excitation voltage is listed
on the sensor datasheet or the test certificate.
Meas. rate
0,1; 0,2; 0,5; 1; 2; 5; 10;
20; 50; 100; 200; 400;
600; 1200 readings/s
Number of measurement readings recorded per second.
Caution
: reduced accuracy for 50 or more readings/s.
Units
Any
The user can specify any units required. 6 characters are
available.
Scal.low
Lower calibration value for 2-point scaling can be entered
here or taught (using
[F3]
"teach-in" function).
The teach-in function only works if the sensor is connected
and the correct channel parameters have been set.
Cal.hi
Upper calibration value for 2-point scaling can be entered
here or taught (using
[F3]
"teach-in" function).
The teach-in function only works if the sensor is connected
and the correct channel parameters have been set.
Scal.low
The lower scale value for 2-point scaling (typical value = 0)
can be entered here.
Scal.hi
The upper scale value for 2-point scaling (typically 100%
of sensor measurement range) can be entered here.
Note:
The mechanical travel of potentiometric displacement sensors may sometimes be greater
than the specified measurement travel. Therefore an electrical dead zone usually exists at
each end. Within this zone, you cannot measure any change in the electrical output signal
despite a movement being made.
The lower and upper calibration values can be found using the "Teach-In" function by pressing the
[F3]
key in the "Channel setup" menu. For the calibration, use a calibrated gauge block that matches
the full measurement range of the potentiometric sensor as closely as possible.
IMPORTANT:
Make sure that both measurement points lie outside the specified dead zone. There
must be a certain gap between the measurement points and the mechanical limits of
travel of the sensor.
7.2.3. Voltage 0 ... 10 VDC
When measuring analog voltages of 0 to ± 10 VDC, only the sampling rate can be changed.
Voltage 0 to 10 VDC
Meas.
mode
10 V
Up to ± 10 VDC
Meas. rate
0.1; 0.2; 0.5; 1; 2; 5; 10;
20; 50; 100; 200; 400;
600; 1200 readings/s
Number of measurement readings recorded per second.
Caution
: reduced accuracy for 50 or more readings/s.
Units
V
Units for measuring voltage = V
