Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 215)

Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012 215
Balancing Application Chapter 8
Taking the Initial Vibration Measurement
1. If you are using an external tachometer, optical tachometer, or strobescope
as the trigger source, connect the tachometer cable (Cat. No. EK-45131)
to the POWER/TRIG connector at the top of the Enpac 2500.
2. Attach a transducer to a bearing house.
3. Mark the rotor by making a mark on one rotor that will serve as a reference
mark.
It is also possible to use an existing mark on the rotor as the reference mark,
such as a key or keyway.
4. Start the machine and allow it to reach normal running speed.
5. Press READ/OK to take an initial vibration measurement.
The data collection will begin as soon as the trigger conditions are
satisfied. The Enpac 2500 automatically measures the speed, vibration, and
plane. The values are continually updated on the screen.
6. When the speed, vibration, and phase values are stable, press READ/OK
to complete the initial measurement.
The results are stored in the Vibration Summary Table.
TIP Skip this step if you are using the internal Laser Tachometer as the
trigger source.
IMPORTANT If the rotor has multiple positions (vanes or fan blades), the reference mark
must be at one of the blade positions.
TIP The Enpac 2500 may ask if the transducer is attached to plane 1. If
the transducer is attached, press F4 (OK).
TIP The green status indicator illuminates when the measurement is
complete.
Refer to Status Indicators on page 25 .