Page 24 - GuardII+ Series 4208 Platform PD User Manual

PD Card Operation

A measurement saved in the Archive due to a Level-Based Trigger will appear in PDView
with a “PD_” flag indicating the level:
• A “PD_MOD” flag indicates a Moderate Level Trigger

• A “PD_H” flag indicates a High Level Trigger
• A “PD_VH” flag indicates a Very High Level Trigger

Figure 4-3 Example of a Level-Based Trigger in PDView

NOTE:
Level-Based Triggers will not occur unless the monitor has been
configured with the appropriate levels using IAM; refer to Section 6.3.

IMPORTANT:
The Very High Level Trigger level is required for the Alert function operate.

4.6.6. Up-Trend Triggers

These Triggers detect a significant increase in Qm levels. Each combination of input,
sensor, polarity and operating point has its own Trigger; this means that an up-trend detected
on input Phase A Machine positive PD at Full Load Hot causes a different Trigger than an up-
trend detected on input Phase A Machine positive PD at Full Load Cold.
The Trigger interval is 30 days; additionally, the current PD levels must be higher than the
Moderate Threshold setting, and the Trigger must be confirmed over multiple measurement
cycles before the Trigger actually occurs.

A measurement saved in the Archive due to an Up-Trend Trigger will appear in PDView
with a flag indicating the specific combination of sensor and polarity that caused the Trigger:

• An “UP_TRD_C1_P” flag indicates an Up-Trend on the ‘C1’ positive sensor (‘C1’ refers
to the Machine sensor for a BUS PD system, EW for an SSC PD system and C1 for a
PDA PD system)
• An “UP_TRD_C1_N” flag indicates an Up-Trend on the ‘C1’ negative sensor

• An “UP_TRD_C2_P” flag indicates an Up-Trend on the ‘C2’ positive sensor (‘C2’ refers
to the Total System Activity for a BUS PD system, Total Slot for an SSC PD system
and C2 for a PDA PD system)

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