KROHNE Summit 8800 Vol 2 - Manual (Page 43)

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08/2013 - MA SUMMIT 8800 Vol2 R02 en
SUMMIT 8800 METERING PRINCIPLES 03
Description
B01
Start proving sequence The proving sequence sub-routine is initiated by the main
prove routine. The results of the individual run are stored in
the status.run’n’ tag.
A general flag is set or reset, this done on the proving
sequence tag.
B02 Regulate control valves? Release PID between runs’. If yes, then the control valve will
be released, and continue to the next step to stabilise flow
again.
B03
Idem
A06
Flow stabilisation Volume, temperature and pressure are checked for
deviations.
Minimum stability duration, this is the waiting time before
stability check;
Maximum stability duration, after this time the conditions
must be stable;
Stability limit, the maximum limit for the deviation.
B04
Idem
A07
Stabilisation completed
successfully?
Check initiated if previous step was successful.
Important: If successful the conditions are recorded and
monitored throughout the proving process.
For reference the standard deviation tag for flow, temperature
and pressure can be found under the following location.
There are a set of deviation alarm tags that are set is the
standard deviation is greater than the limit set.
B05 Check deviation of
conditions
Volume, temperature and pressure are checked for deviations
from the start of the prove.
B06 Proving run This step is depended on the type of prover configured.
Depending on the selection, a sub-routine is started.
Refer to prover>prover options>general>prover type
Ball prover (tag: ball position)
• Idle
• Initialising switches
• Waiting for initialisation
• Forward rotate 4 way valve
• Forward counting pulses
• Forward waiting chamber
• Initialising switches
• Waiting for initialisation
• Reverse rotate 4 way valve
• Reverse counting pulses
• Reverse waiting chamber
• Generating report
Master meter (tag: run position)
1. Idle
2. Initialising switches
3. Waiting for initialisation
4. Starting run
5. Counting Pulses
6. Ending run
7. Ending run
8. Generating report