High Temperature Accelerometers - Synotech Sensor und

High Temperature AccelerometersTechnical SpecificationsModel Technical Number Specifications 357D90 357D91Part Performance Number 357D90 357D91Sensitivity (± 10 %)5 pC/g.51 pC/(m/s²)Measurement Range± 1,000 g pk± 9,800 m/s² pkFrequency Range (± 5 %)2.5 kHzFrequency Range (± 1 dB)4 kHzResonant Frequency ≥ 14 kHz ≥ 13.5 kHzNon-linearity (per full scale range) ≤ 2.5 %Transverse Sensitivity ≤ 5 %EnvironmentalOverload Limit (Shock)± 2,000 g pk± 19,600 m/s² pkTemperature Response ± 15 % [1]Temperature Range(Survivable Limit)Temperature Range(Cable Termination)Temperature Range(Operating)Electrical-67 to 1,400 °F-55 to 760 °C-67 to 900 °F-55 to 482 °C-67 to 1,200 °F-55 to 649 °CCapacitance 990 pF [1] 1,000 pF [1][2]Insulation Resistance(@ 1,200 °F [649 °C])≥ 10 kohmInsulation Resistance(@ 70° F [21°C])≥ 100 MohmOutput PolarityNegativeElectrical IsolationSignal isolated from casePhysicalSensing GeometryShearHousing MaterialInconelSealing (Sensor Housing)HermeticSealing (Connector)Welded HermeticSize (Height x Length x Width).66 in x 1.26 in x .66 in16.7 mm x 32.0 mm x 16.7 mmWeight (without cable)1.8 oz50 gm [1]Electrical ConnectorIntegral Hardline CableCable Length10 ft 10 ft3.05 mCable TypeMI Hardline CableCable Termination10-32 Coaxial JackMountingThrough HoleSupplied AccessoriesModel 081B108 Mounting Screw, 1/4-28x1 (1)Model ACS-1 NIST traceable frequency response (10 Hz toupper 5% point). (1)NotesAll specifications are at room temperature unless otherwise specified[1] Typical.[2] Additional cable length will add approximately 100 pF/ftAccessories & Cables: Pages 146 - 159High Temperature Sensing TechnologyIt is often necessary to monitor vibration levels of rotatingmachinery operating at elevated temperatures or in hightemperature environments. Such circumstances place extremedemands on vibration sensors and require use of accelerometerswith special design characteristics that extend their useabletemperature range beyond that of other conventional units. Forthese demanding situations, IMI Sensors offers two styles ofhigh temperature industrial vibration sensors.A variety of ICP ® piezoelectric industrial accelerometers areavailable with high temperature “HT” option, which extendstheir usable range to 163 ˚C. This option replaces their standard,internal signal conditioning circuitry with circuitry specificallydesigned 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, datacollection and signal conditioning equipment as standard, ICP ®industrial accelerometers.For extreme, high temperature requirements, charge outputaccelerometers are recommended. Designed to withstandtemperatures to 649 ˚C, charge output accelerometers donot contain internal signal conditioning circuits which imposetemperature limits on standard piezoelectric ICP ® accelerometers.However, since there is no signal conditioning circuitry withincharge output accelerometers, alternative cable and signalconditioning equipment are required. To simplify installation ofthese sensors, IMI Sensors offers complete kits that include thenecessary low noise cable and in-line charge converter to adapta charge output accelerometer to conventional ICP ® sensorsignal conditioners and data collection equipment.