Page 22 - GuardII+ Series 4208 Platform PD User Manual
P. 22

PD Card Operation



                        •  If the answer is less than the Trigger interval, then the Trigger does not occur again.

                        •  If the answer is more than the Trigger interval (or it has never occurred before), then
                            the Trigger now happens.

                        Each  Trigger  has  its  own  interval,  and  each  is  tracked  separately  from  all  the  other
                     Triggers.  Some Triggers are resolved to a specific input pair or even sensor; in this case,
                     each  input  pair  or  sensor  has  its  own  interval  that  is  tracked  separately.    Some  Trigger
                     intervals are based on the voltage rating of the machine being monitored.

                        All Trigger intervals are backed up so that in the event of a power failure, the GuardII+ will
                     remember its Trigger status when it starts back up.  In the event that it is necessary to start
                     the Trigger system over from scratch, it can be reset using the Clear Trigger History utility in
                     IAM described in Section 6.7.3.

              4.6.3.  Time-Based Trigger
                        This is the simplest Trigger; it saves a measurement every Trigger interval regardless of
                     whatever else is happening with the data.
                        The Trigger interval will be set to 14 days if the machine’s voltage rating is 6 kV or less, or
                     to 30 days if the machine’s voltage rating is greater than 6 kV.
                        A measurement saved in the Archive due to a Time-Based Trigger will appear in PDView
                     with a “PTB” flag as shown in Figure 4-1 below; in the case of a Time-Based Trigger, each
                     measurement in the set will have the same Trigger indication.
















                                    Figure 4-1 Example of a Time-Based Trigger in PDView

                                     NOTE:
                                     Time-Based Triggers will occur even if the machine is offline causing PD
                                     measurements to fail due to a lack of synchronization.  If this occurs, then
                                     the  measurement  saved  will  be  flagged  as  having  failed  due  to  no
                                     synchronization.


              4.6.4.  Operating Point Time-Based Triggers

                        These  are  Time-Based  Triggers  combined  with  Operating  Condition  data,  saving
                     measurements at specific operating points.  There are three different Operating Point Time-
                     Based Triggers:
                        •  Full Load Hot



                                                              14
                                                                                          www.irispower.com
   17   18   19   20   21   22   23   24   25   26   27