Nivus osm-f, Инструкция по эксплуатации

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Instruction Manual
OCM F
OCM F - Rev. 04 as of 18.02.2014 Page 93
12.4 Verification and Simulation of Input and Output Signals
The I/O menu (see Chap. 9.5) allows to verify connected sensors as well as to
check signal inputs and outputs with the aid of several submenus. Various val-
ues can be indicated (current input and output values, relay conditions, echo
profiles, single velocities etc.), signals or conditions however (offset, adjustment,
simulation or similar) cannot be influenced.
Analog output signals, relay conditions as well as the theoretical flow can be
simulated in the CAL menu (see Chap. 9.6).
12.5 Verification of Flow Velocity Measurement
Use the menu I/O/v-histogram to view the frequency histogram of the V-sensor.
Chapter 8.5.6 describes how to assess the histogram.
The velocity can be verified using a portable flowmeter e.g. PCM Pro, PVM-PD,
hydrometric vane etc.). A calibration factor can be entered here if the deviation
of the flow velocity should be strong (chapter 9.6.2)
The sensor is obstructed due to build-up or soiling (

to be removed) as soon as
the histogram indicates visible disturbances.
Another reason is that the sensor may have been installed at a hydraulically un-
favourable position tending to low measurement quality or measurement failure
(

check installation position of sensor).
Please note, that without a working level measurement it is not possible to
measure flow velocities and hence the flow cannot be computed.
If the flow velocity measurement fails, the sensor however is connected correctly
and lines, clamping connections and overvoltage protection have been checked,
the sensor possibly may be defective.
In various countries it may be necessary to carry out regular maintenance with
comparative measurements in particular applications to comply with official regu-
lations. If desired, NIVUS is going to carry out all required verifications, hydraulic
and technical assessment, calibration, troubleshooting and repairs if an accord-
ing maintenance agreement has been contracted. These services will be carried
out according to DIN 19559 incl. the agreed proof of the remaining residual er-
ror, as well as according to rules in the respective countries.