Nivus OCM PRO CF, Инструкция по эксплуатации

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Instruction manual
OCM Pro CF
page 168 OCM Pro CF - Rev. 09 as of 07.06.2016
®
12.4 Verification and Simulation of Input and Output Signals
The I/O menu (see Chap. 9.6) allows to verify connected sensors as well as to
check signal inputs and outputs with the aid of several submenus.
The I/O menu allows to indicate various values:
-
current input and output values,
-
relay conditions, echo profiles,
-
single velocities etc.
The menu however does not allow to affect signals or conditions (offset, adjust-
ment, simulation or similar).
Analog output signals, relay conditions as well as the theoretical flow can be
simulated in the CAL menu.
12.5 Verification of Flow Velocity Measurement
Flow velocities within the single gates can be viewed in:
-
I/O Menu\Sensors\V-Sensor
-
RUN menu under >Graphics<.
the bottom line of the screen shows
-
the individually selected level positions
-
the accompanying flow velocity
One more possibility can be found in I/O-Menu\Sensors\V-Sensor (see
Chap. 9.5.5, Fig. 9-131). These individual velocities can be verified using a port-
able flowmeter (e.g. PCM Pro, PVM-PD, hydrometric vane etc.).
In chapter 9.2, Fig. 9-6 a disturbed flow velocity graph is depicted.
Mechanical disturbance
A disturbed graph may have several reasons:
-
sensor build-up
-
sensor blockage
Measures: remove these disturbances (blockage or build-up).
Hydraulic disturbance
Another reason may be:
-
sensor may have been installed at a hydraulically unfavourable position
Low quality or inaccurate readings.
Measures: check installation position of sensor and relocate the sensor if re-
quired.
The sensor is obstructed due to build-up or soiling (
à
to be removed) as soon as
the flow velocity graph indicates visible disturbances as depicted Chap. 9.2, Fig.
9-6. Another reason is that the sensor may have been installed in position with
improper hydraulic conditions tending to low measurement quality or measure-
ment failure (
à
check installation position of sensor).