Page 17 - GuardII+ Series 4208 Platform EV User Manual

GuardII+ EV Card Operation

4.5. Operating Point

During EV analysis, each measurement is categorized by Operating Point. This is a
combination of the synchronization data and the operating conditions. There are 5 different
operating points:

Operating Point Description
FLC The operating conditions are within the Full-Load-Cold range.
FLH The operating conditions are within the Full-Load-Hot range.
RLH The operating conditions are within the Reduced-Load-Hot range.
The RPM measured from the shaft trigger indicates that the
machine is at full-speed, but the operating conditions are not
Synchronized in the range of either FLC, FLH or RLH.
This will also occur if the RPM is measured at full-speed, and
there is no operating condition data available.
The RPM measured from the shaft trigger indicates that the
machine is not at full-speed, and the operating conditions are
Unknown not in the range of either FLC, FLH or RLH.
This will also occur if there is no shaft trigger or operating
condition data available.

NOTE:
An EV system that has neither a shaft trigger nor operating condition data
will only report an operating point of ‘Unknown’.

4.6. EV Measurement Triggers and Archive

The GuardII+ can store up to 2 years of measurement data; this storage is referred to as
the Archive. GuardII+ EV monitoring uses an analysis algorithm to decide when measurement
data should be saved in the Archive. The results of this algorithm are called Triggers.
When a Trigger occurs, measurement data is saved. This includes data acquired from all
enabled inputs. The measurement(s) that caused the Trigger will be flagged indicating which
Triggers occurred. A single measurement may have multiple flags, indicating that the
measurement satisfied multiple Trigger conditions.

4.6.1. EV Trigger Inputs
To evaluate the Triggers, GuardII+ needs to know certain information, some of which is
programmed during configuration, and some is obtained during operation:
• The Full Load/Reduced Load and Hot/Cold thresholds need to be defined.

• The Moderate, High and Very High vibration thresholds need to be set.
• The current Operating Conditions of the monitor are crucial to the operation of many
Triggers; specifically, the Active Power and Asset Temperature. Without these, the
monitor cannot determine the current operating point of the machine. Additionally, the

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