Nivus OCM F, Instruction Manual

Page: 97 / 110

Verification of the Measurement System
OCM F - rev. 05 / 06.04.2018 page 97
Fig. 27-1 Determination of reference level under operating conditions
Important note
Flow velocity sensors with pressure measurement sensor (Type KP) must be uninstalled as
soon as the pressure level measurement fails. The sensor shall be soaked for an appropri-
ate period and the pressure channel shall be flushed carefully of shall be cleaned with a
soft brush.
Do not use high pressure to flush the channel. This may lead to misadjustment of the
0-point or may even destroy the built-in pressure sensor.
Furthermore never remove the ground plate (risk of leakage or sensor destruction)!
28 Verification of external Level Measurement
Using an external level measurement (e. g. i-Series sensor) needs to measure the filling level
in the channel with a yardstick (see Fig. 27-1) to adjust the zero point on the level transmitter
if required.
Then compare output signal as well as measurement span of the external measurement with
the analog input signal and the measurement span of the OCM F in PAR menu as well as in
I/O menu and adjust accordingly if required.
29 Verification and Simulation of Input and Output Signals
The I/O menu (see chapter “24 Signal Input/Output Menu (I/O)”) allows to verify connected
sensors as well as to check signal inputs and outputs with the aid of several submenus. Vari-
ous values 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 chapter “25 Calibration and Calculation Menu (CAL)”).