ISA-RP-37 MIL-STD-202E ISA-37 CA92675

Piezoresistive pressure transducer Features Description · 5000 to 20 000 psig · Rugged · High sensitivity

Model 8511A-5K, -10K, -20K Piezoresistive pressure transducer Features Description · 5000 to 20 000 psig · Rugged · High sensitivity · Temperature compensated The Endevco model 8511A is a rugged, piezoresistive pressure transducer for high pressures. It has a 3/8-inch mounting thread and is available in ranges from 5000 to 20 000 psig. Endevco pressure transducers feature an active four-arm strain gage bridge diffused into a sculptured silicon diaphragm for maximum sensitivity and wideband frequency response. Self-contained hybrid temperature compensation provides stable performance over the wide temperature range of 0°F to 200°F (-18°C to +93°C). Endevco transducers also feature excellent linearity, high shock resistance, and high stability during temperature transients. 3/8-24 UNF-2A THD .438 HEX (11.13) .567 (14.40) 8511A .855 (21.72) ON SPECIAL ORDER, THE AREA BEHIND THE PROTECTIVE SCREEN CAN BE FILLED WITH BLACK SILICONE GREASE 8511A-XXM1 .589 (14.96) The model 8511A is widely used for high pressure applications such as studies of structural loading by shock waves resulting from explosive blasts, pulsations in hydraulic and combustion systems. For harsh environments where there is particle impingement, an optional version is available with a protective screen and a black silicone grease coating which further reduces photoflash sensitivity and provides an effective thermal barrier for short duration high temperature service. Endevco models 136 Three-Channel System, model 4428A or 4430A Signal Conditioner, or OASIS 2000 Computer-Controlled System are recommended as signal conditioner and power supply. .877 (22.28) CASE CABLE SHIELD RED+ IN GRN + OUT BLK - IN WHT - OUT STANDARD TOLERANCE INCHES (MILLIMETERS) .XX = +/- .03 (.X = +/- .8) .XXX = +/- .010 (.XX = +/- .25) cmyk Model 8511A-5K, -10K, -20K Piezoresistive pressure transducer Specifications The following performance specifications conform to ISA-RP-37 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 8511A-5K -10K -20K Range [1] Positive sensitivity [1] Combined: non-linearity, non-repeatability, pressure hysteresis [2] Non-Linearity, Independent Non-Repeatability Pressure Hysteresis Zero measurand output [3] Zero shift after 2x range Thermal zero shift From 0°F to 200°F (-18°C to +93°C) Thermal sensitivity shift From 0°F to 200°F (-18°C to +93°C) Resonance frequency Non-linearity at 3x range [4] Photoflash response [5] Warm-up time [6] Acceleration sensitivity Burst pressure (diaphragm) psig mV/psi 0-5000 0.100 ±0.033 0-10 000 0.050 ±0.017 0-20 000 0.025 ±0.008 % FSO RSS typical % FSO typical % FSO typical % FSO typical mV Max ±% 2X FSO Max 1.5 1.2 0.5 1.0 ±25 0.1 3.0 2.5 0.5 1.0 ±25 0.2 3.0 2.5 0.5 1.0 ±25 [4] ±% FSO Max 3 3 3 ±% Max Hz 1.5 % 3X FSO Equiv. psi -5k ms 20v Equiv. psi/g psi Min 4 >1 000 000 0.3 12 1 0.001 20 000 4 >1 000 000 0.8 25 1 0.002 30 000 4 >1 000 000 [4] 50 1 0.003 40 000 Electrical Full scale output Supply voltage [7] Electrical configuration Polarity Resistance Input Output Isolation Noise 500 mV typical (270 mV min) at 10.0 Vdc 10.0 Vdc recommended, 18 Vdc maximum Active four-arm piezoresistive bridge Positive output for increasing pressure into (+) port 2000 ohms min 1000 min 100 megohms minimum at 50 Volts; leads to case, leads to shield, shield to case 5 microvolts rms typical, dc to 50 000 Hz; 50 microvolts rms maximum, dc to 50 000 Hz Mechanical Case, material Cable, integral Dead volume (+) port Mounting/torque Weight Stainless steel Four conductor No. 32 AWG Teflon® insulated leads, braided shield, silicone jacket. 30 ±3 in (760 ±76mm) 0.004 cubic inches (0.06 cc) 3/8-24 UNF-2A threaded case 0.567 inch (14.4 mm) long/12 ±2 lbf-ft (16 ±2 Nm) 11 grams (cable weighs 9 grams/meter) Environmental Media Temperature [8] Vibration Acceleration Shock Humidity Media in (+) measurand port is exposed to nickel-iron alloy, Parylene C and epoxy. Internal seals are epoxy and are compatible with clean dry gas media. -65°F to +250°F (-54°C to +121°C) 1000 g pk 1000 g 20 000 g, 100 microsecond haversine pulse Isolation resistance greater than 100 megohms at 50 volts when tested per MIL-STD-202E MIL-STD-202E, Method 103B, Test Condition B. External case is sealed with epoxy. Circuit within case, vented through cable, is coated with Parylene C. Calibration data A calibration certificate is supplied with each unit. Notes 1. 1 psi = 6.895 kPa = 0.069 bar. 2. FSO (Full Scale Output) is defined as transducer output from 0 to + full scale pressure. 3. Zero Measurand Output (ZMO) is the transducer output with 0 psig applied. 4. Overrange is limited to 40 000 psi for the 8511A-20K 5. Per ISA-37 ISA-37.10, Para. 6.7, Procedure II. Filling the 8511A or M1 - G option version with black silicone grease (available as factory order) reduces these values by a factor of 10. 6. Warm-up time is defined as elapsed time from excitation voltage "turn on" until the transducer output is the ±1% of reading accuracy. 7. Use of excitation voltages other than 10.0 Vdc requires manufacture and calibration at that voltage since thermal errors increase with high excitation voltages. 8. Maintain high levels of precision and accuracy using Endevco's factory calibration services. Call Endevco's inside sales force at 800-982-6732 for recommended intervals, pricing and turn-around time for these services as well as for quotations on our standard products. Accessories 22688 22686 Copper gasket (-5k, -10k) Washer, high pressure (-20k) Optional accessory 24328 4 conductor shielded cable screen grease APPLIES TO CALIFORNIA FACILITY Continued product improvement necessitates that Endevco reserve the right to modify these specifications without notice. Endevco maintains a program of constant surveillance over all products to ensure a high level of reliability. This program includes attention to reliability factors during product design, the support of stringent Quality Control requirements, and compulsory corrective action procedures. These measures, together with conservative specifications have made the name Endevco synonymous with reliability. ©ENDEVCO CORPORATION. ALL RIGHTS RESERVED 30700 RANCHO VIEJO ROAD, SAN JUAN CAPISTRANO, CA92675 CA92675 USA (800) 982-6732 · (949) 493-8181 fax (949) 661-7231 · www.endevco.com · Email: applications@endevco.com 0208 cmyk