Endress+Hauser prolevel FMC 661, Руководство по эксплуатации

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6.4 Exchanging transmitters and sensors
FMC 661 transmitter If the Prolevel FMC 661 has to be exchanged, the replacement need not be recalibrated.
Simply enter the settings which you have noted in the Table at the back of the manual.
For versions with Rackbus RS-485 interface, the parameters can be downloaded from
the computer.
•
Sequences requiring a particular order must be re-entered in that order
•
Any linearisation must be manually reactivated by entering the mode in V2H0.
Capacitance probes
with EC 37 Z/EC 47 Z For level measurement, provided the sensor constants were entered before calibration,
it is not necessary to recalibrate the instrument when the electronic insert is replaced.
On replacement:
•
the zero frequency (or offset) f
o
and
•
sensitivity S
for the range selected (default Range II) must be entered at V3H5 and V3H6 respectively.
Fig. 2.2 shows where the information is to be found on the EC 37 Z and EC 47 Z inserts.
•
If a different range is selected, the transmitter must be recalibrated.
•
If the constants were not entered a recalibration is necessary.
Procedure
Step Matrix Entry Significance
1 V3H5 e.g. 57.2 Enter zero frequency (offset)
2 - »E« Register entry
3 V3H6 e.g. 0.652 Enter sensitivity
4 - »E« Register entry
EC 17 Z insert If the capacitance probe was used for limit switching on channel 2, a recalibration is
necessary.
Deltapilot S Provided a »dry« calibration was made or the sensor constants were entered before
calibration, it is not necessary to recalibrate the instrument when the electronic insert is
replaced. The measurement can be taken up again as soon as the new constants have
been entered in the matrix.
•
If the old sensor constants were not entered, the system must be recalibrated.
The new sensor constants are found in table 2.2., p. 13.
•
f
o
is the zero frequency (or offset)
— the zero frequency may also be read from V0H8 when the probe is
unpressurised. This value gives slightly better accuracy, since it accounts for
the orientation of the probe.
• ∆
f is the sensitivity
Liquiphant No recalibration is necessary if the Liquiphant is exchanged.
Chapter 6: Trouble-Shooting Prolevel FMC 661
44 Hauser