Owner manual

88 Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012

Chapter 2 Setting Up Measurements

Spectrum Alarms in the Enpac 2500 Data Collector

The Enpac 2500 supports band alarms with up to ten bands.

• You can have the data collector collect a spectrum measurement if a

magnitude alarm is in alarm. Set the Collect and store condition in the

Edit Storage Specification dialog to ‘On Magnitude Alarm’ for the storage

specification for the spectrum measurement definition.

• You must set Trigger to ‘Yes’ for any alarms you want to appear in the

Enpac 2500 during data collection. If you set Trigger to ‘Yes’ for two or

more alarms for the same measurement definition, Emonitor combines the

alarms before sending the combined alarm to the Enpac 2500.

For more on how Emonitor combines alarms before sending them to the

Enpac 2500, see

Alarms and the Data Collector on page 95.

The Enpac does not support spectrum alarms. You can still set up the alarms for

the spectrum measurement definitions. Emonitor tests the data against the

alarms after you unload the data.

Typical Spectrum Measurement Definitions

This figure shows the setup for typical spectrum measurement definitions. The

first is a standard spectrum, the second is an order normalized spectrum, and the

third is a time synchronous spectrum.

Figure 17 - Spectrum Measurement Definitions

The following table shows the collection specifications (in the same order as the

measurement definition table above).

The following table shows the transducer specification in the collection

specifications.

Table 25 - Collection Specifications for Spectrum Measurement Definitions

Transducer Window Signal Detection Fmax Lines Phase Order Norm? Averages

Accelerometer Hanning Peak 2 kHz 400 No No 4 linear

Accelerometer Hanning Peak 10 orders 400 No Yes 4 linear

Accelerometer Hanning Peak 2 kHz 400 No No 4 time synch.

Table 26 - Transducer Specification in Spectrum Collection Specifications

Name Base Unit Input Type Units Calibration Value DC Offset