Flow meter compressed air
SDGx50
11
5.5.2 Consumed quantity monitoring via pulse signals
Every time the volumetric flow quantity (pulse value) set under [ImPS] has been reached, the output
provides a pulse signal.
The pulse signal consists of a short switching on and off of the output. The switching status LEDs on
the unit do not display the switching operation.
Pulse signals are not available via the IO-Link interface.
5.5.3 Consumed quantity monitoring via switching signal
When the volumetric flow quantity set under [ImPS] has been reached, the output provides a switching
signal. The output remains switched until a reset is carried out. When the totaliser has been reset,
metering starts again.
By setting [rTo] it is defined when the output switches and when the totaliser is reset:
[rTo]
Output
Totaliser reset
OFF
The output switches when the volumetric flow quan-
tity set under [ImPS] is reached.
u
Carry out a manual reset.
• Automatic reset when the maximum display
range is exceeded.
1, 2,... h
1, 2,... d
1, 2,... w
The output switches only if the volumetric flow quan-
tity set under [ImPS] is reached within the set time.
When the output is not switched:
• Time-controlled reset (the time set under rTo is
exceeded).
When the output is switched:
u
Carry out a manual reset.
• Automatic reset when the maximum display
range is exceeded.
The maximum display range is reached at a consumed quantity of 100 000 000 m³.
5.6 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
5.7 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).
5.8 Simulation
When the simulation is started, the values of the totaliser are frozen and the simulated totaliser is set
to 0. The simulated flow value then has an effect on the simulated totaliser. When the simulation is
ended, the initial totaliser values are restored.
