Aerospace Energy Measurement Piezoelectric accelerometer Model 6243M1/M2 Key features • +1200˚F (+650˚C) operation • Integral hardline cable • Hermetically sealed • No pyroelectric or thermal velocity spiking • Single bolt mount • Ground isolated Endevco model 6243M1 and 6243M2 piezoelectric accelerometers are designed specifically for use in extremely high temperature environments such as aircraft and ground-based gas turbines. These accelerometers are designed for continuous operation at +1200˚F (+650˚C) and intermittent operation (see note 5) up to +1400˚F (+760˚C). The small size and light weight of these accelerometers facilitate installation in cramped locations with minimal structural support. 6243M1 and 6243M2 incorporate Meggitt’s MC2 shear mode crystal. The 6243M1 has its sensitive axis located in line with the mounting screw. The 6243M2 has its sensitive axis located perpendicular to the mounting screw. The sensing elements and integral shield are isolated from the case. The accelerometer features an integral hardline cable of customer specified length, in which the standard length is 120 inches. The cable is triaxial with the termination of the signal positive and negative leads through a 10-32 coaxial receptacle. The connector is designed to operate in an environment up to +900˚F (+482˚C). Meggitt Sensing Systems Our measurement product competencies: Piezoelectric accelerometers | Piezoresistive accelerometers | Isotron accelerometers | Variable capacitance accelerometers | Pressure transducers | Acoustic sensors | Electronic instruments | Calibration systems | Shakers | Modal hammer

Aerospace Energy Measurement Piezoelectric accelerometer Model 6243M1/M2 Specifications The following performance specifications conform to ISA-RP-37.2 (1964) and are typical values, referenced at +75˚F (+24˚C) and 100 Hz, unless otherwise noted. Calibration data, traceable to National Institute of Standards and Technology (NIST), is supplied. Dynamic characteristics Units Charge sensitivity Typical pC/g Tolerance pC/g Frequency response Resonance frequency Typical kHz Minimum kHz Typical amplitude response [1][2] ±5% Hz ±10% Hz ±3dB Hz Temperature response +1200˚F (650˚C) max/min % Transverse...

Aerospace Energy Measurement Piezoelectric accelerometer Model 6243M1/M2 Accessories Signal conditioner Notes 1. Frequency response is controlled by the resonance characteristics of the transducer. Estimated calibration errors are ±1.5% to 900 Hz and ±2.5% from 900 Hz to 5000 Hz. 2. Low-end response of the transducer is a function of its associated electronics. 3. The electrical resistance of piezoelectric materials decreases with an increase in temperature and can approach 10000Ω at +1200˚F (+650˚C). 4. Dash number “ZZZ” indicates the cable length in inches. See table below for tolerance on...