SKF Machine Condition Advisor

SKF Machine Condition Advisor

SKF Machine Condition Advisor CMAS 100-SL Machine monitoring, made simple

SKF Machine Condition Advisor simultaneously measures vibration signals and temperature to indicate machine health or bearing damage.

Now both novice users and experts can eas ily, quickly, and accurately check the condi tion of rotating equipment throughout your facility. Equipping your maintenance and operations personnel with this rugged, ergo nomic and easy-to-use instrument can pro vide early warning of potential machine problems before a costly failure occurs.

• Flexible enough to work with standard • 100 mV/g constant current accelerom eters, an optional external sensor can be used for hard-to-reach locations and for more repeatable and accurate measure ment results.

Features English, French, German, Portu guese, Spanish and Swedish for user con venience.

Features • • Quick and easy to set up and use, meas urements are shown on a bright display viewable in low light to direct sunlight. Free on-line training is also available at SKF @ptitude Exchange.

Lightweight, compact, and ergonomically • designed, the SKF Machine Condition Advisor fits neatly at the belt line, in a pocket or a tool kit. Exceptionally durable, the unit is rated IP 54 for use in industrial environments.

Alert and Danger prompts provide • • increased diagnostic confidence.

Measuring Velocity, Enveloped Accelera tion, and temperature simultaneously saves time.

Efficient, economical, and environmentally friendly, the rechargeable SKF Machine Condition Advisor operates 10 hours on a single charge.

Multiple measurements with a single device The SKF Machine Condition Advisor provides an overall “Velocity” vibration reading that measures vibration signals from the machine and automatically compares them to pre-programmed International Organiza tion for Standardization (ISO) guidelines. An “Alert” or “Danger” alarm displays when measurements exceed those guidelines. Simultaneously an “Enveloped Acceleration” measurement is taken and compared to established bearing vibration guidelines to verify conformity or indicate potential bear ing damage.

The SKF Machine Condition Advisor also measures temperature using an infrared sensor to indicate uncharacteristic heat.

Accuracy, flexibility and confidence When performing measurements, the SKF Machine Condition Advisor’s acceleration sensor input signal is processed to produce two different measurements for each POINT on the machinery – overall velocity and enveloped acceleration. At the same time, the SKF Machine Condition Advisor’s non contact infrared sensor measures the surface temperature of the measurement location and simultaneously displays all three measurement values.

Depending on the SKF Machine Condition Advisor’s System setting, the front-panel LCD simultaneously displays: • • • • Units in Metric or English Velocity in mm/s RMS or IPS derived Peak Temperature in Celsius or Fahrenheit Acceleration enveloping readings in gE Quick and easy – first time and every time

1 2 3

the SKF Machine Condition Advisor “On”.

Press the sensor tip against the point to be measured.

When the readings stabilize, press the


Press “Select” or “Browse” button to turn “Select” button to hold the reading.

Read and record the measurement values.

LCD display in measurement mode

Enveloped Acceleration Velocity Alarm display:

(A) Alert or (D) Danger

ISO machine group Select button Browse button Temperature Measurement status Enveloped Acceleration class Battery indicator (60% full)

Specifications • Vibration pickup:

Internal: Integrated piezoelectric accel • •

eration External: Accepts a standard 100 mV/g constant current accelerometer Temperature sensor: Internal infrared temperature sensor Measurements:


· · Range: 0,7 to 65,0 mm/s (RMS), 0.04 to 3.60 in/s (equivalent Peak), meets ISO 10816 Frequency: 10 to 1 000 Hz, meets ISO 2954 Enveloped acceleration: · · Range: 0,2 to 50,0 gE Frequency: Similar to Band 3 (500 to 10 000 Hz)

Temperature: · Range: –20 to +200 °C ·

(–4 to +392 °F)

Infrared temperature accuracy: ±2 °C • ·

(±3.6 °F)

Distance: Short range, maximum 10 cm (4 in.) from target Operating temperature range:

– –

In use: –10 to +60 °C

(14 to 140 °F)

While charging: 0 to 40 °C •

(32 to 104 °F)

Storage temperature:

Less than one month: –20 to +45 °C • • • •

– (–4 to +113 °F)

More than one month, but less than six months: –20 to +35 °C (–4 to +95 °F) Humidity: 95% relative humidity, non-condensing Enclosure: IP 54 Approvals: CE Drop test: 2 m

(6.6 ft.)

• • • • • • Weight: 125 g

(4.4 oz.)


Length: 200,0 mm

(7.90 in.) –

Width: 47,0 mm

(1.85 in.) –

Height: 25,4 mm

(1.00 in.)

Battery life: 10 hours before charging again (≈1 000 measurements)

With external sensor: Up to 55% less battery life Supported external sensor: Any standard accelerometer with 100 mV/g sensitivity constant current External sensor power: 24 V DC at 3,5 mA Charger specifications:

– –

Universal AC/DC wall plug-in Input: 90 to 264 V AC, 47 to 60 Hz

– –

Output: 5 V DC regulated 3 to 4 hours for a full charge


Understanding and using guidelines for vibration The SKF Machine Condition Advisor provides a means to evaluate machine health based on ISO 10816-3 and to evaluate the bear ings according to general guidelines devel oped from a statistical analysis of existing databases.

How to choose the correct “Alarm Velocity Group” for your machinery

The Alarm Velocity Group (G2&4 or G1&3) determines the instrument’s “overall vibra tion” alarm limits. Therefore, select the Group that best describes the general size, type, and speed of the machinery being measured. Note that these machine group classifications are set forth in ISO 10816-3, which rates overall velocity vibration levels for standardized machinery classifications.

Groups 2 and 4 (default)

ISO Group 2 and 4 classifications define the following type of machinery: • • • Medium-sized machines and electrical machines with a shaft height between 160 and 315 mm (6.3 and 12.4 in.).

These machines are normally equipped with rolling element bearings, but may use sleeve bearings, and operate at speeds above 600 r/min.

These machines include pumps with multi-vane impellers and integrated drivers.

Groups 1 and 3

ISO Group 1 and 3 classifications define the following type of machinery: • • Large machinery and electrical machines with a shaft height greater than 315 mm

(12.4 in.)


These machines are generally equipped with sleeve bearings, but may use rolling element bearings.

These machines include pumps with multi- vane impellers and integrated drivers.

Rigid or Flexible foundation?

An additional setting allows the specification (when defining the overall alarm levels) of measurements taken from machinery with


(default) or Flexible foundations.

Options are: G2 and 4R (default)

Alert: 2,8 mm/s (0.16 ips) Danger: 4,5 mm/s (0.25 ips)

G2 and 4F

Alert: 4,5 mm/s (0.25 ips) Danger: 7,1 mm/s (0.39 ips)

G1 and 3R

Alert: 4,5 mm/s (0.25 ips) Danger: 7,1 mm/s (0.39 ips) Expanding your capabilities with SKF Machine Condition Advisor compatible accessories

Extension sensor kit Model CMAC 105-K

The Extension sensor kit CMAC 105-K con tains an accelerometer with integral cable (CMAC 104) and magnet (CMAC 109) with mounting stud. This kit is needed to take measurements from hard-to-reach places and for more repeatable and accurate meas urement results.

G1 and 3F

Alert: 7,1 mm/s (0.39 ips) Danger: 11,0 mm/s (0.61 ips)

How to choose the correct “Enveloped Acceleration Classification” for your machinery

The Enveloped Acceleration Classification (CL1, CL2, or CL3) you specify determines the instrument’s “bearing vibration” alarm levels. Therefore, the Enveloped Acceleration Classification that best describes the general size and speed of the bearings being measured should be selected.

Options are: CL1

Bearings with a bearing bore diameter be tween 200 and 500 mm (7.9 and 19.7 in.) and a shaft speed below 500 r/min.

Alert: 1 gE Danger: 2 gE

CL2 (default)

Bearings with a bearing bore diameter between 50 and 300 mm (2.0 and 11.8 in.) and a shaft speed between 500 and 1 800 r/min.

Alert: 2 gE Danger: 4 gE


Bearings with a bearing bore diameter be tween 20 and 150 mm (0.8 and 5.9 in.)and a shaft speed from 1 800 to 3 600 r/min.

Alert: 4 gE Danger: 10 gE


As with all commonly published severity guidelines, the above provides target thresholds for new, refurbished and recently maintained equipment. In addition, if both lower limits of the guideline are used (for example in CL2, a 50 mm bearing bore diameter at 500 r/min), the applicable alarm values maybe lower. Note that bearing bore diameter is equal to shaft height.


• • • Small size case 0,5 to 15 000 Hz frequency response • 100 mV/g sensitivity (±3 dB) Waterproof

Integral cable (1,5 m standard)

• • Connector to SKF Machine Condition Advisor CMAS 100-SL Various cable lengths available

Magnet, Model CMAC 109

• • 14 kg

(30 lbs.)

pull-strength 25 mm

(1 in.)

diameter • / •


-28 mounting hole Case material: Stainless steel • Magnet material: Neodymium • /


-28 Mounting Stud

24,0 mm

(0.94 in.)




-28 mounting hole ø 25,0 mm

(1.0 in.)


Expanding your capabilities with SKF Machine Condition Advisor compatible

accessories (continued)

Specifications (Accelerometer) Dynamic performance

• Sensitivity (±15%): 10,2 mV/(m/s


) • •

(100 mV/g)

Dynamic range: ±490 m/s


Frequency response: (±50 g)

±3 dB: 30 to 900 000 CPM (0,5 to

– 15 000 Hz)

±10%: 42 to 420 000 CPM (0,7 to

7 000 Hz)

• • •


• • • • Settling time: ≤2,5 sec Voltage source: 18 to 30 V DC Constant current excitation: 2 to 10 mA Spectral noise at:

10 Hz: 27,0 μg/√Hz

– –

100 Hz: 6,5 μg/√Hz 1 000 Hz: 2,5 μg/√Hz Output impedance: <100 Ω Bias output voltage: 7 to 14 V DC Case isolation: >10


Ω • • • • • •


Sensing element: PZT Ceramic Sensing structure: Shear mode Weight: 20 g

(0.7 oz.)

Case material: 316L stainless steel Mounting:




-28 Resonant frequency: 1 920 000 CPM •

(32 000 Hz)

Calibration certificate: CAL-Cert CMAC 105

ø 5,0 mm

(0.18 in.)

73,0 mm

(2.87 in.)

27,0 mm

(1.07 in.)

ø 12,0 mm

(0.49 in.)

14 mm ( 9 / 16 in.) Hex ø 13,0 mm

(0.50 in.)

1 / 4 -28 Mounting hole


• Temperature range: –50 to +121 °C • • • •

(–58 to +250 °F)

Maximum shock protection: 49 km/s


peak (5 000 g, pk) Electromagnetic sensitivity: CE Sealing welded: Hermetic Submersible depth: 152 m

(500 ft.)

Ordering information

SKF Machine Condition Advisor CMAS 100-SL includes:

• • • • • SKF Machine Condition Advisor unit Belt holster [CMAC 102] Charger, international DC power supply [CMAC 8004] User manual, English hard copy [32131800-EN] CD containing:

User manual available in PDF files in

English, French, German, Portuguese, Spanish and Swedish Link to training on SKF @ptitude Exchange

Please contact:


Condition Monitoring Center – San Diego

5271 Viewridge Court • San Diego, California 92123 USA Tel: +1 858-496-3400 • Fax: +1 858-496-3531

Web Site:

® SKF is a registered trademark of the SKF Group.

All other trademarks are the property of their respective owners.

© SKF Group 2011 The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein. SKF reserves the right to alter any part of this publication without prior notice.

SKF Patents include: #US04768380 • #US05679900 • #US05845230 • #US05854553 • #US05992237 • #US06006164 • #US06199422 • #US06202491 • #US06275781 • #US06489884 • #US06513386 • #US06633822 • #US6,789,025 • #US6,792,360 • US 5,633,811 • US 5,870,699 • #WO_03_048714A1

PUB CM 2387 EN · March 2011

– –

SKF Machine Condition Advisor trend worksheet (Excel .xls file) SKF Condition Monitoring Essentials catalog available in PDF file in English [CM2355] CD, Integrating Condition Monitoring Products and Services, product catalog [CM5057]


• Extension kit, 100 mV/g accelerometer • • with 1,5 m integral cable and magnet [CMAC 105-K] Extension kit, accelerometer with 3 m

(9.8 ft.)

integral cable and magnet [CMAC 105-K-3M] Extension kit, accelerometer with 5 m • •

(16.4 ft.)

integral cable and magnet [CMAC 105-K-5M] Extension kit, accelerometer with 10 m

(32.8 ft.)

integral cable and magnet [CMAC 105-K-10M] Connection cable, 1,5 m [CMAC 107]

(4.9 ft.)

with M8 socket type connector for standard con stant current 100 mV/g accelerometer


• Charger, international DC power supply, • • +5 V, 1 600 mA, 90 to 264 V AC, 47 to 63 Hz [CMAC 8002] Magnet, magnet base, 25,4 mm

(1.0 in.)

diameter, 13,6 kg (30 lbs.) pull-strength [CMAC 109] Belt holster [CMAC 102]

Optional kits that includes the SKF Machine Condition Advisor, CMAS 100-SL

• • • • • SKF Basic Condition Monitoring kit [CMAK 400-ML] SKF Electric Motor Assessment kit [CMAK 200-EN] SKF Bearing Assessment kit [CMAK 300-SL] SKF Energy Monitoring kit [CMAK 450-ML] SKF Advanced Bearing Analysis kit [CMAK 600-EN]

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