Endress+Hauser silometer FMC 671 Z - Continuous Level Measurement with Separate Level Limit Detection

8.3 Continuous level measurement with separate
level limit detection
Operating mode 0 allows level measurement on channel 1 and level switching on
channel 2. If a Deltapilot S is being used, only a Liquiphant can be used as limit switch.
Each channel is assignet to a relay.
• Relay 1 (channel 1) and relay 2 (channel 2) are set as described in Chapter 6
and Section 8.2.
• Calibration for each channel is as described in Chapter 4 and Section 8.2.
For capacitance probes the system can be calibrated as follows:
Level limit probe
calibration with
empty vessel
Step Matrix Entry Significance
1 V9H5 e.g. 672 Reset transmitter
2 - »E« Register entry
3 V8H0 0 Select level switching mode
4 - »E« Register entry
5 V8H4 1 Set sensor type to capacitance probe
6 - »E« Register entry
7 V8H6 e.g. 1 Set switching point in Hz
8 - »E« Register entry
9 V8H5 0 Calibrate with probe uncovered
10 - »E« Register entry (must be pressed!!)
Level calibration
Step Matrix Entry Significance
1 V0H1 e.g. 10% With vessel 0
…
40% full, enter current level
2 - »E« Register entry
3 V0H2 e.g. 90% With vessel 60
…
100% full, enter current level
4 - »E« Register entry
Probe 1
continuous
measurement
Probe 2
limit switching
Level
Channel 1
Relay 1 = level
Relay 2 = switching
Channel 2
BA063D45
Fig. 8.5:
Operating mode 0
Continuous level measurement
with simultaneous level switching
Silometer FMC 671 Z/676 Z Chapter 8: Other Applications
46