Monarch Instrument EXAMINER 1000 User Manual
Page 5
2
BATTERY
C O M P A R T M E N T
Contains two “AA”
alkaline batteries.
REAR PANEL CONNECTIONS
1234
1234
AUDIO OUT
SENSOR IN
1234
1234
1234
1234
1234
CONNECTIONS
QUICK REFERENCE
INSTRUCTION
PANEL
PRODUCT SERIAL
NUMBER
AUDIO OUT
1/8” (3.5 mm)
stereo mini plug
SENSOR INPUT
BNC Connector
output 18 vdc @ 2 mA
VOLUME
CONTROL
TOP VIEW
E X A M I N E R
1 0 0 0
VIBRATION METER
ELECTRONIC STETHOSCOPE
REFER TO OPERATORS MANUAL
FOR INSTRUCTIONS
CONNECTIONS
SENSOR IN AUDIO OUT
Measurement Types Units
V
velocity
mm/s in/s
A
acceleration
g
E
envelope
g e
Monarch Instrument
15 Columbia Drive
Amherst, NH 03031 USA
Trend Comparison
The most efficient and reliable method of evaluating vibration severity is to compare
the most recent reading against previous readings for the same measurement Point,
allowing you to see how the Point’s vibration values are “trending” over time. This
trend comparison between present and past readings is easier to analyze when the
values are plotted in a “trend plot”. A trend plot displays current and past values
plotted over time. Measurement records should also include a baseline (known good)
reading. The baseline value may be acquired after an overhaul or when other
indicators show that the machine is running well. Subsequent measurements are
compared to the baseline to determine machinery changes.
Comparison with Other Machinery
When several similar machines are used under the same operating conditions,
evaluation can be carried out by measuring all machines at the same Points and
comparing the results.
Evaluating Acceleration Envelope Measurements
Use the same techniques of comparison as for Overall Vibration readings.
Remember, acceleration envelope is an advanced “early warning” of a developing
problem. High values do not necessarily indicate bearing failure. They can
also indicate:
A. Lack of lubrication or decreasing oil viscosity due to high bearing
temperature caused by overload or external heat source.
B. Breaking of the lubricant film by excessive imbalance, misalignment, or
housing deformation. Loss of boundary lubrication.
C. A rubbing seal or cover.
D. Gear mesh interaction (bad lubrication, defects)
E. Dirt or particles in the lubricant, or a seal or filter problem.
Use trend Comparison similar to overall vibration to establish severity levels.
Accelerating Envelope readings tend to decrease as Overall Vibrations readings
increase. This happens when the defect in the bearing is becoming more severe and
the frequency it generates becomes lower which makes it better read with the
Velocity-type readings.
Audio Comparison with Other Bearings on the Same Machinery
When several bearings are used under the same operating conditions, evaluation
can be carried out by listening to the audio signals to determine changes. This method
will help to locate the defective bearing quickly. Measure all machines at the same
Points and compare the results. Listen for increases in signal and for “clicking”
patterns which indicate wear.
13