Vibration & Temperature Sensor
Contents
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Why monitor vibration?
Health degradation curve
Predictive maintenance monitoring
Overview of Vibration measurement
Monitor a wide range of machines
Set alarm levels
Mounting options
Select a Node
Select thresholds
Battery life
Models
Specifications
Predictive maintenance monitoring examples
Why Monitor Vibration?
■ Monitoring vibration reduces downtime
– Use predictive maintenance programs
– Plan maintenance more efficiently
– Monitor machine run time
■ Vibration is often the result of components that are:
– Imbalanced
– Misaligned
– Worn
– Loose
– Improperly driven
Detecting increased vibration early helps reduce machine
damage and avoid failures
Condition
Health Degradation Curve
With Predictive
Maintenance
Program
Preventive
Maintenance
Predictive
Maintenance
Operator
Care
Run to
Failure
Time
Predictive Maintenance Monitoring
Vibration & temperature data is generated
to provide health status of machines
Send threshold signal
to a central location
Local Indication
Send vibration & temp data via
the gateway to the control
system for collection & trending
Vibration Measurement Overview
■ Vibration can be measured using any of the following
measurement techniques:
– Displacement
– Acceleration
– Velocity
Vibration Measurement Overview
■ Vibration can be measured using any of the following
measurement techniques:
– Displacement = distance moved
• Useful below 5 Hz
• Structural vibration (buildings, bridges, earthquakes, etc.)
Vibration Measurement Overview
■ Vibration can be measured using any of the following
measurement techniques:
– Acceleration = rate of change in speed
• Useful in high frequency measurements
• High frequency monitoring above 2 KHz is used to detect certain
bearing and gearing vibration
Vibration Measurement Overview
■ Vibration can be measured using any of the following
measurement techniques:
- Velocity = speed of movement
• Most uniform response over wide range of machine frequencies
• Considered universal measure of machine integrity in relation to
alignment and balance
Vibration Measurement Overview
■ Let’s look at why Velocity is the best for us to use
Displacement
Works great at
low frequencies
but falls off at high
frequencies
Velocity
Is independent of
frequency over a very
wide frequency range
Acceleration
Works great at higher
frequencies but falls
off dramatically at
lower frequencies
Vibration Measurement Overview
■ So, what does the Vibration Velocity look like?
It would be nice if everything vibrated at a fixed frequency
Vibration Measurement Overview
■ So, what does the Vibration Velocity look like?
It would be nice if everything vibrated at a fixed frequency
But they don’t! You get something that looks like this:
Vibration Measurement Overview
■ Wouldn't it be great if we could see each of the frequencies and
what they add to the total vibration?
Vibration Measurement Overview
■ Wouldn't it be great if we could see each of the frequencies and
what they add to the total vibration?
■ We can, through the use of an FFT (Fast Fourier Transform)
Vibration Measurement Overview
■ The Banner QM42VT1 sensor uses an FFT (Fast Fourier
Transform) to convert the vibration signal from a time domain to a
frequency domain. We then take the integral sum of all of these
frequency peaks in order to calculate the total RMS Velocity
Vibration Measurement Overview
RMS Velocity
■ RMS (root-mean-square) is in essence an averaging
operation that conveys the effective energy within a
signal
■ RMS velocity is the most common and effective
measure of machine vibration severity in rotating
equipment.
– This is an indication of the vibration energy produced
by the machine
– It is expressed in inches per second (in/s) or millimeters
per second (mm/s)
Vibration Measurement Overview
■ The Banner QM42VT1 uses a MEMS based
accelerometer as its core sensing element for vibration
■ It uses advanced signal processing techniques to output
a digital signal that represents a true RMS velocity
between 10 and 1,000 Hz.
■ In addition to Vibration it also provides temperature data
■ These can be trended so that the user can set thresholds
and alarms based on machine history
■ The ISO 10816 Vibration Severity Chart can be used as
guidance to set threshold levels.
Vibration Measurement Overview
■ The ISO 10816 vibration severity chart is a well established
standard that is based on historical machine vibration data.
■ It defines acceptable limits of vibration severity, using RMS
velocity, and can be used to set vibration alarm levels.
■ Absolute levels of vibration will vary based on many factors
including type of machine, mounting, etc.
■ Temperature alarms can be set up to 80°C
Monitor a Wide Variety of Equipment
Motors
Pumps
Compressors
Fans
Blowers
Gear boxes
Monitor a Wide Variety of Equipment
■ The Banner QM42VT1 sensor is a Vibration Monitoring Tool
■ Its purpose is to monitor a machine to determine if it is going out of
specified operational standards, both Vibration and Temperature.
This is very important in assisting Predictive Maintenance.
■ It is not an Analyzer
– An Analyzer provides detailed information to allow a Vibration
Tech to determine points of failure on a machine.
– Analysis is typically done on a periodic basis on large
equipment
– Analyzers are embedded in Ultra High dollar equipment
■ The QM42VT1 does not compete with the Analyzer. It can in fact
be used as a precursor to Analysis.
Monitor a Wide Variety of Equipment
Ultra
High $
High Dollar
Mission Critical
Important Plant Equipment
Small motors and Ancillary Equipment
Set Alarm Levels
Vibration alarm levels can also be set by establishing a vibration
baseline for a machine:
• Use LCD display on DX80 Gateways and P6 Nodes to calculate
RMS velocity (see below)
• Trend RMS velocity over time to establish baseline
• Set alarm level at 1 ½ - 2 times the baseline vibration level
How to convert the holding register representation into RMS velocity:
Example in/s
The LCD readout for input 1 is 970
970 ÷ 10,000 = .097
Example mm/s
The LCD readout for input 2 is 2,490
2,490 ÷ 1,000 = 2.49
RMS velocity in/s = .097
RMS velocity mm/s = 2.49
P6 Node
Select Vibration Threshold
■ Vibration thresholds are DIP switch selectable on the Q45
Description
DIP Switches
1
2
3
4
Vibration alarm at 0.15 in/sec (default setting)
ON
OFF
OFF
OFF
Vibration alarm at 0.25 in/sec
ON
OFF
OFF
ON
Vibration alarm at 0.35 in/sec
ON
OFF
ON
OFF
Vibration alarm at 0.55 in/sec
ON
OFF
ON
ON
Local light disabled (conserves battery)
OFF
ON
ON
OFF
UCT configurable
■ Use UCT to set the temperature threshold and vibration thresholds
for the P6 and H6*
*Use the MultiHop configuration tool for the H6
Mounting Options
BWA-BK-002
Standard bracket
¼” – 28 cap screw included
BWA-HW-057
Two sided thermal
transfer mounting tape
(ships with sensor)
(ships with sensor)
BWA-BK-001
Magnetic bracket
Mounting
Select Node*
Q45
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Easily connect to vibration sensor using the 5-pin M12 Euro connector
Set thresholds using DIP switches
Built in LED light is pre-mapped to illuminate amber when the vibration threshold
has been exceeded and red when the temperature threshold has been exceeded
Typically 1 to 6 sensors/nodes
Two 3.6V AA lithium batteries
2.4 GHz
P6 Performance
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Easily connect to vibration sensor using the 5-pin M12 Euro connector
LCD display
Star topology allows for up to 47 sensors/nodes
One 3.6V D-cell lithium battery
Available in 900 MHz (1 Watt) and 2.4 GHz
H6 Multihop
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Easily connect to vibration sensor using the 5-pin M12 Euro connector
LCD display
Tree topology allows for multiple hops to cover longer distances and circumvent
obstacles
50+ sensor/nodes per master radio
One 3.6V D-cell lithium battery
Available in 900 MHz (1 Watt) and 2.4 GHz
*Vibration sensor must be paired with a Banner Wireless Node
Battery Life
Q45:
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P6 and H6:
3+ years at 5 minute sample rate on the Q45 & P6/H6 at 250
Mw
2 ½ years at 5 minute sample rate for the P6/H6 at 1 Watt
Default sample rate is 5 minutes
For the first 15 minutes after power up, the node goes into fast
sample mode, sampling every second
To take it out of fast sample mode prior to 15 minutes, click the
button 5 times (button 1 on the P6 & H6)
Fast sample mode will expire after 15 minutes, to put the node
back into fast sample mode single click the button again
Sensor and Node Models
1- Wire Serial Sensor
Models
QM42VT1
Description
Vibration & temperature sensor with 1-wire Serial interface
1- Wire Serial Nodes
Models
DX80N2Q45VT
Description
Q45 Vibration/temp node
DX80N9X1S-P6
Frequency
2.4 GHz
900 MHz
1-wire Serial Performance node
DX80N2X1S-P6
2.4 GHz
DX80DR9M-H6
900 MHz
1-wire Serial Modbus MultiHop Slave
DX80DR2M-H6
2.4 GHz
QM42VT1 Sensor Specifications
Supply Voltage
3.6 to 5.5 V dc
Current
Active comms: 11.9 mA at 5.5 V dc
Mounting Threads
M12 x 1
Indicators
Green flashing: Power ON
Amber flicker: Serial Tx
Vibration
Mounted base resonance: 5.5 kHz nominal
Measuring range: 0 – 65 mm/sec or 0 – 6.5 in/sec RMS
Frequency range: 10 – 1000 Hz
Accuracy: ± 10% @25 °C
Temperature
Measuring range: -40 °C to +105 °C (-40 °F to +221 °F)
Resolution: 0.1 °C
Accuracy: ±3 °C
Environmental Rating
NEMA 6P, IEC IP67
Shock
400g
Predictive maintenance monitoring examples
Simple point-to-point, local indication system
PM2 Gateway is premapped to support
up to two nodes
Model
Description
Qty
QM42VT1
Vibration & temperature sensor
1
DX80N2Q45VT
Q45 Vibration & temperature node
1
DX80G2M6S-PM2
PM2 Gateway – 4 DI, 4DO, 2AI, 2AO
1
Predictive maintenance monitoring examples
Point-to-multipoint, and send signal to central location
Each machine is mapped
to a light segment
Model
Description
Qty
QM42VT1
Vibration & temperature sensor
3
DX80N9X1S-P6
P6 1-wire serial Performance Node
3
DX80G9M6S-P2
Performance Gateway – 4 DI, 4DO, 2AI, 2AO
1
TL70DXN9YYYQ
TL70 Wireless Tower Light
1
Predictive maintenance monitoring examples
Point-to-multipoint, and send data to Gateway for collection
GatewayPro converts Modbus
register values to Ethernet/IP
for collection and trending
Model
Description
Qty
QM42VT1
Vibration & temperature sensor
4
DX80N9X1S-P6
P6 1-wire serial Performance Node
4
DX80P9T6S-P
GatewayPro – Modbus/TCP to Ethernet/IP
1