DID-UM-002
Val Controls A/S
•
Limfjordsvej 3
•
DK-6715 Esbjerg N
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Tel. +45 7547 0600
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www.valcontrols.com
Revision: 10
16/74
6.1.1
PST error and warning parameters
The error and warning parameters are automatically set during auto calibration and Partial stroke
reference tests but can be manually adjusted through ValConnect, the display or remote
communication.
PST errors
For the partial stroke the error parameters are set to the following values:
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Breakaway timeout = Reference breakaway time + reference PST time
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PST timeout = Reference total time
•
Total timeout = 2 * Reference total time
•
Minimum breakaway pressure = Reference pressure at SP
•
Minimum allowed pressure = Reference minimum pressure – 10% of Reference start
pressure
The Start pressure low and high error limits are not set automatically and the function is disabled as
default.
PST warnings
The partial stroke warning parameters are set to the following values after a successful calibration:
•
Low breakaway time = Reference breakaway time – 50%
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High breakaway time = Reference breakaway time + 50%
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Low breakaway pressure = Reference breakaway pressure – 50%
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High breakaway pressure = Reference breakaway pr 50%
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Low partial stroke time = Reference partial stroke time – 50%
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High partial stroke time = Reference partial stroke time + 50%
•
Maximum travel = Move at reference 5 %
