Endress+Hauser Prolevel FMC 662, Installation And Operating Instructions Manual

Page: 36 / 52

5.1 Differential level measurement
Differential level measurement is carried out in operating mode 3, see Fig. 5.2. The
calibration procedure is as below.
Calibration
# Matrix Entry Significance
1 V9H5/V3H5/V3H6 Commission as per
V7H5/V7H6
Section 4.1
2 V8H0 3 Differential level
3 - »E« Register entry
4 V0H1 E
1
Empty level probe 1
5 - »E« Register entry
6 V0H2
F
1
Full level probe 1
7 - »E« Register entry
8 V4H1 E
2
Empty level probe 2
9 - »E« Register entry
10 V4H2 F
2
Full level probe 2
11 - »E« Register entry
Note!
•
Steps 4
…
11 can be done in any order.
•
Use same units for both probes
After calibration V0H0 indicates the level measured by probe 1, V4H0 the level difference h
2
- h
1
.
Next step
…
If required, linearisation (e.g. flowrate for open channel) on channel 1, p. 26. Set
analogue outputs and relays in calibration or linearisation units, p. 28
…
31
- Output 1 follows level h
1
measured by probe 1
- Output 2 follows differential level h
2
- h
1
.
»Empty«
e.g. 10%
BA143_37
Fig. 5.2:
Schematic diagram of differential
level measurement mode
Note!
BA143_38
»Full«
e.g. 90%
Fig. 5.3:
Parameters for calibration of probes 1 and 2
Chapter 5: Other Operating Modes Prolevel FMC 662
34 Hauser