5-26
Chadwick-Helmuth A Business Unit of Honeywell International, Inc.
Chapter 5
- Maintenance And Repair
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: for channel connected to Velocimeter
input, set to Frequency = 490.0 +/- 0.1 Hz, Waveform = Square wave. Monitor signal
generator output with spectrum analyzer with marker at 490 Hz. Adjust signal generator
output channel connected to Velocimeter input until amplitude is 134.4 +/- 0.5 mV RMS.
c.
Press
STATUS
key on 8500C/C+.
d.
Press
MORE KEYS
.
e.
Press
SELF-TEST
soft key.
f.
Press
HW TEST
soft key. The Self Test menu appears.
g.
Select
ANALOG FILTER TEST
with arrow keys.
h.
Press
EXECUTE
soft key.
You cannot proceed until the Analog Filter test passes. Occasionally the Analog Filter test
may fail with nothing permanently wrong with the 8500C/C+. If it does fail, press OK soft
key and the EXECUTE soft key to run again. If it continues to fail, refer to Table 5-8,
“Troubleshooting Guide”.
i.
After Analog Filter Test passes, return to Self Test menu by pressing
OK
soft key.
j.
Exit Self Test menu by pressing
QUIT
soft key.
k.
Press
SPECTRUM
key on 8500C/C+.
l.
Press
SETUP
key.
m.
Select
<Hz>
on display with arrow keys.
n.
Press
CHANGE
soft key change to
<RPM>
. These units give a finer resolution for this
test.
o.
Key in 29788 (rpm) with numeric keys in
MAXIMUM FREQUENCY
field.
p.
Select
SEEK
: field with arrow keys.
q.
Press
CHANGE
soft key to select
SEEK: <ON>
.
r.
Press
ENTER
soft key.
s.
Wait 10 seconds and then press
START
key.
The acquired spectrum shows a range of odd harmonic peaks on the 8500C/C+ display, from the
1st (fundamental) on.
CAUTION
