Specifications

MHC Bearing Checker
Easy to Use and Interpret for
Quick Analysis
Simply attach the unit via the
magnetic sensor head and
within 10 seconds both dB
Level and Distress® values will
be displayed. dB Level is an
indication of the overall noise of
the bearing and is dependent on
speed. It increases with speed of
rotation, but also with degradation
of the bearing or inadequate
lubrication. Distress® gives an
instant indication of the state of
the bearing’s health. A reading
below 10 generally indicates
The MHC Bearing Checker
monitors high frequency Acoustic
Emissions (AE) signals naturally
generated by deterioration in
rotating machinery. The unique
way of detecting and processing
these signals provides condition-
related information in the easiest
possible form. It is a state-of-
the-art condition monitoring
instrument with extreme sensitivity
to developing faults.
How Does it Work?
As the mechanical condition of
machinery deteriorates, energy
loss processes such as impacts,
friction, and crushing generate
sound wave activity that spans
a broad range of frequencies. By
detecting only the high frequency
part of this signal with special AE
sensors, it is possible to detect
miniscule amounts of activity (e.g.
a slight rub, a brief impact, or
the crushing of a single particle
in the lubricant). The patented
MHC sensor gives improved
repeatability and is remarkably
rugged. A magnetic front face
allows easy attachment to
multiple machines.
normal operation, higher than 10
is usually indicative of bearing
damage or the need for attention.
Distress® and dB Level are
the fundamental parameters of
the pocket-sized MHC Bearing
Checker.
The unit is powered by an internal
rechargeable battery, offering
up to 1000 measurements
between charges. Recharging is
accomplished through a micro
USB port.
Sensor
Sensing Element Resonant piezoelectric at 100 kHz
Calibration Factory set
Signal Measurement Description Range Resolution
Distress® (dst) Fault indicating parameter 0 to 40 1 unit
dB Level (dB) Logarithmically scaled mean signal level 10 to 80 dB 1 dB
Features
Display LCD, 2 lines by 8 characters
Distress® Display Numeric or Text (“OK” if <10, “Suspect” if between 10 & 15, “Poor” if > 15)
Reading in progress Flashing LED indicator (in addition to LCD display message)
Non-Volatile Memory Shows last taken readings when unit is switched on
Auto Shut-Off Instrument auto switches off 30 seconds after last button press
Internal Batteries NiMH rechargeable battery via micro USB port
- Typically over 1000 measurements between charges
Operating Temperature 0°C to 65°C
Overall Dimensions 3.86 in (98 mm) x 2.44 in (62 mm) x 1.34 in (34 mm)
Weight 7.94 ounce (225 g)
Features and Bene ts
• Last Measurement Recall
• Simple One-Handed Operation
• Rechargeable through USB Port
• Ease of Operation
1.34”
3.86”
2.44”
Parker’s MHC* Bearing Checker is a new, unique hand-held instrument,
providing maintenance engineers with an easy-to-operate, simple to use, and
quick method of analyzing bearing condition and lubrication state.
Speci cations
*MHC - Machinery Health Check
Part Number Description
FGH11510PA MHC Bearing Checker
Ordering Information
66