IFM SDP110, Operating Instructions Manual

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SDP110 Air gap sensor
10
2
1
MEW MAW AEP ASP
Q [m
3
/h]
[µm] D 0 400
[none] 0 800
[bar] P 0 -1 16 20
7,2 6 0
4
3,8
3,5 FOU=OFF
20
20,5
21,5
[mA]
FOU=On
6
UL OL
3
4
5
500
1000
(D
max
)
Err Err
Fig. 4: Characteristics of the analogue output according to the standard IEC 60947-5-7
1: Analogue signal MAW: Initial value of the measuring range (with setting of low flow
cut-off for Q: signal output starting at MAW + LFC)
2: Process value (Q; P; D) MEW: Final value of the measuring range
3: Detection zone ASP: Analogue start point
4: Setting range AEP: Analogue end point
5: Measuring range UL: Setting range not reached
6: Scaled measuring range OL: Setting range exceeded
Q: Flow
P: Pressure
D: Distance
Under fault conditions the analogue output is adjustable:
• [FOU] = On: The analogue signal goes to 21.5 mA.
• [FOU] = OFF: The analogue signal goes to 3.5 mA.
• [FOU] = OU: The analogue signal goes to 21.5 mA (pressure measurement) /
The analogue signal goes to 3.5 mA (distance measurement and flow measurement).
4.6 Measured value damping
Use the damping time [dAP] to set after how many seconds the output signal has reached 63 % of the
final value if the measured value changes suddenly. The set damping time stabilises the switching
outputs, the analogue outputs, the display and the process value transmission via the IO-Link
interface.
The damping time is added to the response time of the sensor (
Ò
Technical data).
The signals UL and OL are defined under consideration of the damping time.
The measured value damping only has an effect on the flow and pressure measurement.
dAP.F = measured value damping for the flow
dAP.P = measured value damping for the pressure
In addition to the damping time of the process value, the unit also features a display refresh rate
which, however, only has an influence on the presentation in the display.
4.7 Low flow cut-off
With the function low flow cut-off [LFC] it is possible to suppress small volumetric flow quantities.
Volumetric flow below the LFC value is evaluated by the sensor as standstill (Q = 0).