Balance Test; Model 11A Calibrator Rotating Disk - Honeywell VXP System Maintenance Manual

Maintenance
The fault log file will be printed on the serial printer. See section 4.4 for an explanation of VXP
error messages. Since the vxpfault.log file is an ASCII text file, it can also be viewed with any text
editor, such as Notepad.

4.3.3 Balance Test

The following test will verify that the VXP AU is functioning properly and will correctly measure
the magnitude and phase of a vibration signal. Two vibration sensors (velocimeter or
accelerometer) and one azimuth sensor (magnetic pick-up or photoprobe) can be mounted on the
Model 11A Calibrator.
NOTE: Ignore the instructions printed on the back of the Model 11A Calibrator.
1. Assemble the test set-up as shown in Figure 4-1 using the appropriate sensors and
cables. Be sure to include a magnetic pick-up or photocell for an azimuth reference.
2. Ensure that one set of No. 6 screws is installed in the single holes directly above and
below the "ch" logo on the calibrator rotor disk. See Figure 4-2.
3. Set CAM RATE (RPM) switch to 900.
4. Turn on calibrator and adjust pot next to 900 CAM RATE switch position until 2
ring from outside on rotor disk appears frozen in place under 60 Hz light.
5. Using the Display Unit and Display Program, click on the Measurements Only
button in the Select Procedure menu of the Application Program. Refer to Section
3.2.1 for detailed instructions on manual operation.
6. In the Measurements Only menu, click on the Bal Meas Only button.
Figure 4-2. Model 11A Calibrator Rotating Disk
1. Attention, users outside U.S.: The 11A Calibrator can also be calibrated under 50Hz light. For 1714
rpm and 923 rpm cam rates, inner two rings on rotor disk are used. Remember to enter half these
rates in VXP setup screen, when called for in the following steps.
4-6 Honeywell
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