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Vibration Monitoring
- Overview
- Vibration Sensor GP-2
- Vibration Sensor GP-3
- Vibration Sensor GP-4
The sensors measure air gap /axial shift (GP-2) or root-mean-square (rms) value of the vibration speed in one (GP-4) or one/three mutually perpendicular directions (GP-3). GP-3 and GP-4 can be used in the systems of vibration diagnostics, thanks to the capability of sending arrays of values, proportional to the instantaneous acceleration. The arrays can then be used to calculate spectral components of vibration with fast conversion by Fourier.
The sensors are based on RISC-controllers with required periphery. All the conversions of the input signal are done inside the sensors, that allows to:
- Improve resistance to noise
- Improve accuracy of measurement
- Avoid the use of additional converters.
GP vibration sensors can be used in explosion-risk areas and have the following specifications:
- Explosion-proof level in form of a special shell and circuit:
- flameproof enclosure, Exd: GP-2 and GP-3
- intrinsic safety, Exi: GP-2, GP-3, and GP-4
- Ingress protection – IP67
- Operating temperature range – -60 … +80 °C (-60 … +85 °C for GP-4)
- Operating voltage – 12…24 VDC (12…26 VDC for GP-4)
- Data exchange interface – RS-485, Modbus RTU
- Software calibration and configuration of the sensors with ConfigGP tool, supplied together with the sensors
For the connection into the existing automation systems, GP vibration sensors have modifications with unified analog output, 4…20 mA.
To provide protection of the equipment without integration into the automation systems, the sensors can be ordered as sensors-switches. In this case, warning and emergency setpoints are written into the internal memory of the sensor during configuration. After reaching the corresponding level, the sensor forms a digital, “open drain”, signal.
Comparison of the Specifications
| Type | Displacement sensors | Accelerometer | Accelerometer |
| Axes of measurement | - | One/three | One |
| Air gap/axial shift measurement range | 0.1…6.0 mm | - | - |
| Root-mean-square (rms) value of vibration speed, measurement range | - | 0.5…30 mm/s | 0.5…30 mm/s |
| Acceleration measurement range | - | 0.2…45 m/s2 | 0.2…45 m/s2 |
| Unified current signal, in proportion to air gap/axial shift | 4…20 mA | - | - |
| Unified current signal, in proportion to rms value of vibration speed | - | 4…20 mA | 4…20 mA |
| Frequency range for rms value of vibration speed | - | 10…1 kHz | 10…1 kHz |
| Supported interfaces | RS-485 | RS-485 | RS-485 |
| Supported protocols | Modbus RTU | Modbus RTU | Modbus RTU |
| Calibration and configuration software | ConfigGP | ConfigGP | ConfigGP |
| Air gap measurement error | Less than 0.5% | - | - |
| RMS value of vibration speed, measurement error | - | Less than 10% | Less than 10% |
| Output data update frequency | Once a second | Once a second | Once a second |
| Operating voltage | 12...24 VDC | 12...24 VDC | 12...26 VDC |
| Current consumption | Less than 60 mA | Less than 60 mA | Less than 60 mA |
| Ingress protection grade | IP67 | IP67 | IP67 |
| Hazardous area approval | |||
| Flameproof enclosure (Exd) | РВ Ex d I Mb X / IEx d IIC T5 Gb Х | РВ Ex d I Mb X / IEx d IIC T5 Gb Х | - |
| Intrinsic safety (Exi) | 0Ex ia IIA Т5 Ga Х | 0Ex ia IIA Т5 Ga Х | 0Ex ia IIA Т5 Ga Х |
| Weight, with 3.5 m cable | 1.5 kg | 1.2 kg | - |
| Weight, with 0.7 m cable | - | - | 0.3 kg |
| Dimensions (GP-2 without cartridge) | 80 x 64 x 47 mm | 65 x 50 x 50 mm | 52 x 60 x 43 mm |
| M12 x L cartridge dimensions | L = 63, 80, 100, 125, 160 mm | - | - |
| Operating temperature range | -60…+80 °C | -60…+80 °C | -60…+85 °C |
The sensor was designed to be used in vibration monitoring and protection systems at the power stations, oil pumping stations, gas compressor stations, and other industrial objects. The sensor can be installed into explosive areas of the premises and external installations, where flammable vapor and gas-air-mixtures of the categories IIA, IIB, IIC of the groups T1-T5, could be formed.
The sensor detects a measurement of the air gap (axial shift) between face of the sensitive part of the sensor and object surface (rotor shaft).
FEATURES
- Axial shift measurement – air gap between the face of the sensitive part of the sensor and object surface (face of the rotor shaft)
- Data exchange via RS-485 (Modbus RTU protocol)
- Output of the signal as a unified current at 4-20 mA
- Comparison of the measured parameter to the limit setpoints, stored in the non-volatile memory of the sensor
- Generation of statuses (Warning and Failure) and generation of discrete signals to the external devices in case of exceeding the set limits (sensor-relay)
- Remote configuration of the parameters: network address, communication speed, warning and failure setpoints; remote calibration of the measured channel
DESIGN
- Housing material – nickel-coated steel
- Explosion protection type – explosion-proof shell
ORDERING INFORMATION
To order, use the following part number:
GP-2X-KYMZ, where:
X – Output signal type:
C – digital
T – digital/current (4-20 mA)
V – digital/discrete
Y – Cable length, 1.5 to 20 m
Z – Protection metal hose length, 0 to 15 m
The sensor was designed to be used in vibration monitoring and protection systems at the power stations, oil pumping stations, gas compressor stations, and other industrial objects. The sensor can be installed into explosive areas of the premises and into external installations, where flammable vapor and gas-air-mixtures of the categories IIA, IIB, IIC of groups T1-T5, could be formed.
The sensor provides measurement of the root-mean-square value of vibration speed / instantaneous value of vibration acceleration in one or three mutually perpendicular directions.
FEATURES
- Measurement of vibration speed root-mean-square value in one or three mutually perpendicular directions
- Signal decomposition into frequency components via Fourier fast conversion
- Data exchange via RS-485 (Modbus RTU protocol)
- Output of the signal as a unified current at 4-20 mA, in proportion to root-mean-square value of the vibration speed
- Comparison of the measured parameter to the limit setpoints, stored in the non-volatile memory of the sensor
- Generation of statuses (Warning and Failure) and discrete signals to the external devices in case of exceeding the set limits (sensor-relay)
- Remote configuration of the parameters: network address, communication speed, warning and failure setpoints; remote calibration of the measured channel
TECHNICAL SPECIFICATIONS
| Measuring range of the root-mean-square value of vibration speed in each of the three sensitivity axes | From 0.5 to 30 mm/s |
| Measuring range of the instantaneous values of vibration acceleration | From 0.2 to 45 m/s² |
| Frequency range of root-mean-square value measurement in each of the three sensitivity axes | From 10 to 1000 Hz |
| Range of the output current signal when measuring mean-square values of vibration speed (unified) | 4-20 mA |
| Range of the output current signal when measuring instantaneous values of vibration acceleration (non-unified) | 0-20 mA |
| Range of the allowed relative error when measuring mean-square values of vibration speed in the full range of frequencies and amplitudes | ± 10 % |
| Relative coefficient of the lateral sensor conversion, max 5% | 5% |
| Level of own noise in the values of the mean-square values of the vibration speed, max | 0.03 mm/s |
| Power supply | 12 … 24 VDC |
| Operating temperature range | -60 … +80 °C |
| Output update time | 1 s |
| Settling time before starting operation, max | 10 s |
| Current required (without use of discrete channels), max | 60 mA |
| Ingress protection | IP67 |
| Explosion proof marking | PB Ex d I Mb X IEx d IIC T5 Gb X 0Ex ia IIA T5 Ga X |
| Weight (with 3.5 m cable) | 1.2 kg |
| Calibration interval | 3 years |
DESIGN
- Housing material – nickel-coated steel
- Explosion protection type – explosion-proof shell
ORDERING INFORMATION
To order, use the following part number:
GP-3X–Y-KAMB, where:
X – Output signal type:
C – Digital
T 420 – Digital and current (4-20 mA)
V – Digital and discrete
T – Digital on mean-square values of vibration speed and current (0-20 mA) for vibration acceleration
Y – Sensitivity axes:
1 – measurement over one axis
3 – measurement over three axes
A – Permanent attached cable length, 1.5 to 20 m
B – Protection metal hose length, 0 to 15 m
The sensor was designed to be used in vibration monitoring and protection systems at the power stations, oil pumping stations, gas compressor stations, and other industrial objects. The sensor can be installed into explosive areas of the premises and into external installations, of the categories IIA, groups T1-T5, where flammable vapor and gas-air-mixtures could be formed.
The sensor provides measurement of the root-mean-square value of vibration velocity / instantaneous value of vibration acceleration in one spatial direction.
FEATURES
- Measurement of vibration velocity root-mean-square value and instantaneous value of vibration acceleration in one direction
- Signal decomposition into frequency components via Fourier fast conversion
- Data exchange via RS-485 (Modbus RTU protocol)
- Output of the signal as a unified current at 4-20 mA, in proportion to root-mean-square value of the vibration velocity
- Output of the signal as a unified current at 0-20 mA, in proportion to instantaneous value of the vibration acceleration
- Remote configuration of the parameters: network address, communication velocity, warning and failure setpoints; remote calibration of the measured channel
DESIGN
- Housing material – nickel-coated steel
- Explosion protection type – explosion-proof shell
ORDERING INFORMATION
To order, use the following part numbers:
GP-4X, where:
X – Output signal type:
C – Digital and current signal (4-20 mA) for vibration velocity
U – Digital and current signal (0-20 mA) for vibration acceleration
GP-4X–Y, where:
X – Output signal type:
C – Digital and current signal (4-20 mA) for vibration velocity
U – Digital and current signal (0-20 mA) for vibration acceleration
Y – Cable in metal housing, length in meters