IMI Industrial Vibration Sensors Katalog Seite 124

Hinweis: Dies ist eine maschinenlesbare No-Flash Ansicht.
Klicken Sie hier um zur Online-Version zu gelangen.

Inhalt

Early Impact Detection IMI Sensors Model 682B05 Bearing Fault Detector US Patent 6 889 553 senses impacts within rolling element bearings caused by bearing faults Typical bearing faults such as cracked races spalling brinelling fatigue failure looseness and loss of lubrication result in impacts and high frequency vibrations inside the bearing The impacts are represented as high amplitude narrow peaks on the acceleration time waveform and add very little energy to the overall vibration level As a result they are often missed in normal trending analysis The Bearing Fault Detector accurately measures these impacts and other high frequency vibrations providing early warning of potential problems This unit is also effective for monitoring other problems that produce similar impacts and vibrations data such as a chipped tooth on a gear The Bearing Fault Detector is a DIN rail mount vibration transmitter that works in conjunction with a typical ICP accelerometer It supplies the constant current power required by the accelerometer processes data and has the following three outputs 4 20 mA proportional to peak amplitude 4 20 mA proportional to overall vibration level and raw vibration signal via BNC connector for diagnostic analysis To obtain peak amplitude measured in a 7 second window the signal is passed through a high pass filter rectified and run through a high speed peak detection circuit To obtain overall vibration level the signal is passed through a low pass filter integrated when velocity is required processed through a true rms circuit and scaled depending on the desired output type rms or calculated peak Bearing Fault Detector output is compatible with any vibration monitoring device or plant equipment that accepts a 4 20 mA signal It can provide 24 7 protection when used with a PLC DCS or SCADA system It can also be used with numerous off the shelf meters alarms and recorders Technical Specifications Model Number 682A05 Input Signal 100 mV g 10 2 mV m s2 Frequency Response 3 dB Overall Vibration 10 Hz to 1k Hz Frequency Response 3 dB Fault 1 or 5 Hz to 100 kHz 1 Measurement Range Fault Detector 50 g Output Range Linear Scale 4 to 20 mA 1 2 Output Range Linear Scale 4 to 20 mA Sampling Time 7 sec Span 5 16 mA Control Interface Power LED Green Environmental Warm Up 2 minutes Temperature Range Operating 32 to 158 F 0 to 70 C Temperature Range Storage 40 to 257 F 40 to 125 C Humidity Range Non Condensing 95 Electrical Supply Voltage 24 VDC Current Consumption 150 mA Excitation Voltage 1 V 24 VDC Constant Current Excitation 1 mA 4 mA Raw Vibration Output 0 01 of Input Vibration Load Resistance 500 ohm Physical Load Resistance 500 ohm 22 5 mm Size Height 3 9 in 99 mm Size Depth 4 5 in 114 5 mm Weight 5 2 oz 145 2 gm Housing Material Polyamide Screw Terminal Wire Size 24 14 AWG 0 2 2 5 mm2 Electrical Connector input output Removable Screw Terminals Electrical Connector Output Vibration BNC Jack Din Rail Mount 1 38 in 35 mm Notes All specifications are at room temperature unless otherwise specified 1 Internal dip switch selectable 2 Output current voltage will fluctuate at frequencies below 5 Hz 3 For CE reference PCB Declaration of Conformance PS051 for details Bearing Fault Detector visit us online at www imi sensors com 1 716 684 0003 121 Technical Specifications Model Number 682B05 Performance t s Accessories Cables Pages 146 159