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7.3. DEFAULT VALUES
When reset 5 is performed, the actual front panel is set to default values for all param-
eters. These default values are shown in Table 7.4. When an Error 100 occurs, all four
front panels are set according to Table 7.4, the generator frequency is set to "1000Hz"
and the charge sensitivity correction is set to 0%.
Parameter
Default Value
Sweep
Rat~
1 Oct/min
Sweep Count
Con.
Sweep Limits, Lower
1,0Hz
Sweep Limits, Upper
9999,999 Hz
Cross-over Frequency 1 -8
9999,601 Hz
Generator Level
-100dB
Compressor Safety Limit, Lower
3dB
Compressor Safety Limit, Upper
3dB
Compressor Rate
1 ,0 dBs-
1
/Hz
Compressor Maximum Speed
1000dB/s
Compressor
On
Set Levels, Maximum Number
1
Set Levels, 1 -9
10,0ms-
2
Force Level
10,0N
Vibration Meter Units (01}
0 (SI Units}
Vibration Meter Time Constant (02}
0 (Auto}
X-ramp Sensitivity (03}
0 (Logarithmic}
Recorder Mode (04}
0
Tracking Filter Bandwidth (05}
2 (30%}
Compressor External Filter (06}
0 (Off}
Vibration Meter External Filter (07}
0 (Off}
Narrow Band Random Noise (08}
0 (Off}
Cross-over Safety (28}
0 (On}
T01486GBO
Table 7.4. Default values
7.4. FREQUENCY, DISPLACEMENT, VELOCITY AND ACCELERATION RELATIONSHIPS
The mathematical relationships between displacement, velocity and acceleration are as
follows:
Displacement (peak to peak)
=
2 d
0
x sin 2 1rft
(where d
0
=
peak displacement)
Velocity (peak)
Acceleration (peak)
=
2 7rf
X
d
0 X COS
2 7rft
=
1rf x displacement (with
goo
phase shift)
= -
(2 1rf)
2
x d
0
x sin 2 1rft
=
-2 ( 1rf)
2
x displacement
=
2 1rf x velocity (with
goo
phase shift)
To ease calculation, Fig. 7.1 and Fig. 7.2 show the relationship between frequency, dis-
placement, velocity and acceleration. The nomograms are intended for
u~e
during set-
ting of the set levels and the associated function selection. They will give an indication
of the resulting cross-over frequencies and help to prevent errors caused by vibration
levels outside the associated measurement range.
73
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