IMI Industrial Vibration Sensors Katalog Seite 108

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High Temperature Accelerometers High Temperature Sensing Technology It is often necessary to monitor vibration levels of rotating machinery operating at elevated temperatures or in high temperature environments Such circumstances place extreme demands on vibration sensors and require use of accelerometers with special design characteristics that extend their useable temperature range beyond that of other conventional units For these demanding situations IMI Sensors offers two styles of high temperature industrial vibration sensors A variety of ICP piezoelectric industrial accelerometers are available with high temperature HT option which extends their usable range to 163 C This option replaces their standard internal signal conditioning circuitry with circuitry specifically designed and tested to reliably withstand elevated temperatures These accelerometers though equipped with the HT option will operate in the same manner and with the same cable data collection and signal conditioning equipment as standard ICP industrial accelerometers For extreme high temperature requirements charge output accelerometers are recommended Designed to withstand temperatures to 649 C charge output accelerometers do not contain internal signal conditioning circuits which impose temperature limits on standard piezoelectric ICP accelerometers However since there is no signal conditioning circuitry within charge output accelerometers alternative cable and signal conditioning equipment are required To simplify installation of these sensors IMI Sensors offers complete kits that include the necessary low noise cable and in line charge converter to adapt a charge output accelerometer to conventional ICP sensor signal conditioners and data collection equipment Technical Specifications Part Number 357D90 357D91 Sensitivity 10 5 pC g 51 pC m s Measurement Range 1 000 g pk 9 800 m s pk Frequency Range 5 2 5 kHz Frequency Range 1 dB 4 kHz Resonant Frequency 14 kHz 13 5 kHz Non linearity per full scale range 2 5 Transverse Sensitivity 5 Environmental Overload Limit Shock 2 000 g pk 19 600 m s pk Temperature Response 15 1 Temperature Range Survivable Limit 67 to 1 400 F 55 to 760 C Temperature Range Cable Termination 67 to 900 F 55 to 482 C Temperature Range Operating 67 to 1 200 F 55 to 649 C Electrical Capacitance 990 pF 1 1 000 pF 1 2 Insulation Resistance 1 200 F 649 C 10 kohm Insulation Resistance 70 F 21 C 100 Mohm Output Polarity Negative Electrical Isolation Signal isolated from case Physical Sensing Geometry Shear Housing Material Inconel Sealing Sensor Housing Hermetic Sealing Connector Welded Hermetic Size Height x Length x Width 66 in x 1 26 in x 66 in 16 7 mm x 32 0 mm x 16 7 mm Weight without cable 1 8 oz 50 gm 1 Electrical Connector Integral Hardline Cable Cable Length 10 ft 10 ft 3 05 m Cable Type MI Hardline Cable Cable Termination 10 32 Coaxial Jack Mounting Through Hole Supplied Accessories Model 081B108 Mounting Screw 1 4 28x1 1 Model ACS 1 NIST traceable frequency response 10 Hz to upper 5 point 1 Notes All specifications are at room temperature unless otherwise specified 1 Typical 2 Additional cable length will add approximately 100 pF ft visit us online at www imi sensors com 1 716 684 0003 105 Technical Specifications Model Number 357D90 357D91 e formance Accessories Cables Pages 146 159