5-18 Chadwick-Helmuth A Business Unit of Honeywell International, Inc.
Chapter 5 - Maintenance And Repair
a. Turn on spectrum analyzer and set up to view a 13.44 mVrms, 100 Hz signal.
Frequency: Baseband, Start: 0 Hz, Stop: 200 Hz
Trigger: Free run
Average: Off
Window: Flat top
Source: Off
Input: DC Coupling, Auto range on
Units: X: Hz, Y: Volt
Vertical Scale: Linear
b. Turn on signal generator and set up as follows:
(1) For channel connected to magnetic pickup input, set to Frequency = 100.00 +/-
0.01 Hz, Waveform = Square wave, Amplitude = 1 to 2 Vp-p.
(2) For channel connected to Velocimeter input, set to Frequency = 100.00 +/- 0.01
Hz, Waveform = Sine wave, Amplitude = 19.0 mV pk.
c. Press BALANCE key on 8500C/C+.
d. Press SETUP key.
e. Key in 6000 with numeric keys in BALANCE FREQUENCY field.
f Select <RPM> on display with arrow keys.
g. Press CHANGE soft key to select <Hz>.
h. Select <AUTO STOP> field with arrow keys.
i. Press CHANGE soft key to select <MAN STOP>.
j. Select PHASE UNITS field with arrow keys.
k. Press CHANGE soft key to select <DEGREES>.
l. Press ENTER soft key.
m. Monitor signal generator output with spectrum analyzer with marker at 100 Hz. Adjust
signal generator output channel connected to Velocimeter input until amplitude is 13.44 +/
- 0.05 mV RMS.
n. Wait 10 seconds.
o. Press START key on 8500C/C+.
p. Verify that 8500C/C+ display indicates:
FREQUENCY: 100.0 +/- 0.1 HZ
VIB LEVEL: 1.000 +0.04/-0.05 IPS
PHASE ANGLE: 180° +/- 3°
q. Press STOP key.
r. Move cable 8278 to next Velocimeter channel position listed in Table 5-4 and move cable
10502 to next magnetic pickup cable position.
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