KROHNE PipePatro EN - Manual (Page 31)

OPERATION
3
31
PIPEPATROL
www.krohne.com 02/2013 - 4002275001 - MA PipePatrol R01 en
3.5 Leak alarm handling
In this chapter it is described step by step how a leak alarm should be confirmed and how the
LDS system can be reset.
In the standard configuration the system differs of four different kinds of leak alarms, which are
coming from four different modules. Three alarms are possible during pumping conditions of
the fluid, Signature-Alarm and Differential-Alarm and Mass Balance-alarm. During Shut-In
operation these modules are disabled. In cases of leak during shut-in conditions, the Shut-In
module will alarm if a leak is recognised.
The following example gives a detailed view on the alarm raises by the Signature-Test module of
the E-RTTM leak detection.
In some cases during transient operation several modules, e.g. Signature-Test and Differential-
Test, are able to raise an alarm. In this case all incoming alarms and leak information will be
displayed. Additionally the alarm will be indicated by an acoustic signal of the Operator Station.
The procedures and the order how to manage a leak alarm coming from another module are
similar to the procedures described in the following. All screens and buttons described in this
chapter are available in the same mode, see the special boxes for each module.
Symbol Colour of filling/outline Description
Pointers of the leak positions Pointers of the leak positions Pointers of the leak positions Pointers of the leak positions 3 3 3 3
3.1 red E-RTTM / signature-test / leak position grad. method
3.2 violett E-RTTM / signature-test / leak position wave method
3.3 orange E-RTTM / differential-test / leak position grad. method
3.4 green E-RTTM / differential-test / leak position wave method
Data box Data box Data box Data box 4 4 4 4
4.1 grey not active / unknown
4.2 green no leak
4.3 red alarm / alarm acknowledge
PLC PLC PLC PLC 5 5 5 5
5.1 dark green standby
5.2 green active
INFORMATION!
This chapter only concerns the LDS. With regards to possible additional actions, the company
policy should be followed.
INFORMATION!
Each of the occurred alarms has to be acknowledged separately by the operator.