Instruction ManualOCM FPage 92 OCM F - Rev. 04 as of 18.02.2014®Fig. 12-1 Determination of reference level under operating conditionsFlow velocity sensors with pressure measurement sensor (Type KP) must beuninstalled as soon as the pressure level measurement fails. The sensor shallbe soaked for an appropriate period and the pressure channel (see Fig. 5-1)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 misadjustmentof the 0-point or may even destroy the built-in pressure sensor.Furthermore never remove the ground plate (risk of leakage or sensor destruc-tion)!12.3 Verification of external Level MeasurementUsing an external level measurement (e.g. NivuMaster) needs to measure thefilling level in the channel with a yardstick (see Fig. 12-1) and to adjust the zeropoint on the level transmitter if required.Then compare output signal as well as measurement span of the externalmeasurement with the analog input signal and the measurement span of theOCM F in PAR menu as well as in I/O menu and adjust accordingly if required.
