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<6. ELECTRONIC TRANSMITTER (-E)>

6-20

IM 01R01B02-00E-E 12th edition October 01, 2014 -00

6.2.14.3 Unsuitable applications

It is possible, that the Float-Blocking-Indication- Function does not work satisfactorily. This can be caused with

different factors which are explained briey here. In these cases the function of the Float-Blocking-Indication is

not suitable for the respective application and it should be turned off.

Applications with gases

At applications with gases and oat-damping it can happen, that the pulsating movements of the medium

(and with that of the oat) are damped so strongly in the measuring tube, that the measuring signal lies under

the autozero value and a Float-Blocking-Indication is not possible.

Applications with high viscous media

If a high viscous medium should be used in the plant, the damping can get so high by the high viscosity of

the ow that the measuring signal lies below the autozero value, and a Float-Blocking-Indication is not

possible.

Applications with quiet ow

If the plant has an extremely quiet ow (gases or liquids) ,the supervision range can be limited in the lower

ow range. Normally greater ow (>30%) causes greater medium ow deviations. The duration of the

supervision can be put to 15 minutes to reach a longer supervision time.

6.2.13.4 Parameter setting

Error message (F41)

Code Meaning Remedy

08 Float blockage

Supervision time gone off

Check oat in tube, clean tube if necessary.

Deactivate oat blocking indication or run Autozero function.

Factory defaults / Master Reset (F65)

The RAMC is adjusted at delivery (Factory Setting):

- F71 - 1 Float-Move-Detection OFF

- F72 - 1 Lower limit value of the supervision area 5 %

- F73 - 1 Supervision time (Time Out) 5 min

- F74 Autozero inactive Autozero value = 0

After Master Reset the following attitudes are given :

- F71 - 1 Float-Blocking-Indication OFF

- F72 - 1 Lower limit value of the supervision area 5 %

- F73 - 1 Supervision time (Time Out) 5 min

- F74 Autozero inactive Autozero value not changed

Damping (F21)

The selection of the damping value has no inuence on the autozero value or the measurement value of the

Float-Blocking-Indication !

YOKOGAWA RAMC User Manual

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