User's Manual

67
Brand of ACOEM
4.5.2 Measurement setup
This tab gives access to following parameters:
 Number of channels: 1 or 2. This value is only accessible for a 2-plane balancing. If 1 is selected at each
run, each point is measured one after the other one. In all other cases, the number of channels is equal to
the number of planes.
 Number of average: 1 to 256. Advised value: 8.
Measurements are obtained by averaging several successive acquisitions. This enables, on one hand, a
statistically representative result to be obtained in the case where the vibration resulting from the
unbalance is disturbed by other factors, and on the other hand, the measurement is combined with two
values resulting from the averaging (dispersion in measurement and rotation speed), which enables the
level and the nature of these perturbations to be assessed. If dispersion is important, it is recommended to
increase the number of averages.
 Input type: select the item corresponding to the used sensor type. The list is:
o Accelerometer IEPE
o Accelerometer AC
o Velocimeter IEPE
o Velocimeter AC
o Displacement AC
 Input unit:
o For accelerometer: G, M/S
2
o For velocimeter: IN/S, MM/S
o For displacement AC: MILS, MICRON
 Measured parameter:
o For accelerometer: Acceleration, Velocity, Absolute displacement
o For velocimeter: Velocity, Absolute displacement
o For displacement AC: Relative displacement
 Parameter unit:
o Acceleration: G, M/S
2
o Velocity: IN/S, MM/S
o Absolute or relative displacement: MILS, MICRON
 Sensitivity for each measurement point in mV/input unit
4.5.3 Sensor position setup
This tab gives access to following parameters:
 For each point:
o Point identification: up to 10 characters
o Channel number: for information
o Angular position of the sensor: Optional input for estimation of the
position of the trial weight. The angle is that between the high position of
the machine and the position of the sensor in the direction of rotor
rotation
 For the tachometer:
o Angular position of the sensor: Optional input for estimation of the
position of the trial weight. The angle is that between the high position of
the machine and the position of the sensor in the direction of rotor
rotation