Fluke 810 - Motor Input (Driver) Information

810
Users Manual
4-6
Note
• Push  to access the on-board help for
any Machine Setup option.
• As you select the options, the Tester
displays a corresponding drivetrain image
template at the top of the display.
gbk115.bmp
The Machine Setup Wizard uses combo boxes. A combo
box is a combination of a drop-down list or list box. You
can choose from the list of existing options. To make a
selection:
1. Push Enter to activate the combo box.
2. Rotate the Dial to highlight different options in
the combo box.
3. Push Enter to confirm the selection. Depending
on the component you select, the options appear
for the details of the component.
Motor Input (Driver) Information
Entering an accurate running speed (RPM) is critical to
receiving a proper diagnosis. An accurate running speed
helps the diagnostic engine in the Tester discern different
fault conditions. The motor nameplate or manual also lists
the running speed.
If an ac motor uses a variable frequency drive (VFD), it
operates under a varying load that influences the
vibration signal. It is important to obtain the correct RPM
using a tachometer. Or, refer to the frequency on the
motor controller label. For consistent diagnoses over
time, it may be necessary to reduce or increase the load
on the motor to match the load from previous
measurements.
Measuring VFDs requires entering RPM at the time of
measurement (instead of relying on RPM values in the
Machine Setup) due to variable loads. To obtain an
accurate RPM value, use the Tachometer provided with
the Tester or obtain the frequency value from the drive
controller itself. To convert the frequency value to RPM,
calculate:
Hz * 60 = RPM
Horsepower (HP) or kilowatt (kW) input is required for the
diagnostic system to identify the number of measurement
locations.