Mode l8500C/8500C+ Operators Manual
C-1
Appendix C. Balance History Files
The Model8500C/C+ Balancer/Analyzer stores balance histories on disk when you press the
STORE
key while in the Balance mode. Data files consist of ASCII text and are created with a unique file name
based on the time and date, plus the file name extension *.BHI. The annotation text last entered with
the
ANNOTATE
key is written to the beginning of the file. This information is identical to the
annotation text appended to printouts.
The averaged phase angle is stored in internal angle units, in which 20 48internal units equals one full
circle. Thus, 2 048inter nalu n i ts = 36 0°=2ãradians. The entries for average vibration amplitude,
average phase angle, and the solution are repeated for each run in the balance history. The following
table (Table C-1) describes the format and contents of a typical balance data file:
Table C-1. Balance Data File Format and Contents (Sheet 1 of 2)
Data from .BHI file Description
08/30/97
acquisition date
10:42:05
acquisition time
AIRSPEED: KTS
annotation text, 1
PICKUP NO.:
...
ALTITUDE: FT
annotation text, 2
RUN NO.:
...
MFR/MODEL:
annotation text, 3
ID NO.:
...
COMMENTS:
annotation text, 4
:
annotation text, 5
Grumman E-2C (Strobex
chart title
3600
acquisition frequency (RPM)
515
averaged measurement (mIPS)
0
averaged phase (internal units)
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