RKMA-P AXTAL | Alldatasheet
Document overview
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Technical content
www.AXTAL.com Wasemweg 5 page 1(2) fon: +49 (6261) 939834 D-74821 Mosbach fax: +49 (6261) 939836 Germany E-mail: info@axtal.com G m b H&C o .K G PRESSURE SENSING QUARTZ CRYSTAL RESONATOR RKMA-P
APPLICATIONS
RKMA-P is a quartz crystal resonator which is packaged in a rectangular enclosure. The resonance frequency varies with the pressure-induced stress. The crystal unit is designed as a prec ision electronic pressure sensor for transducer, manometers, and controllers with a frequency output for the conversion of the absolute pressure to frequency.
FEATURES
- High resolution and accuracy - Long term quartz crystal stability - Wide temperature range (-55…+80 °C) - Low power consumption - Suitable for precision pressure equipment ELECTRICAL CHARACTERISTICS (at normal climatic conditions) / OPERATING CONDITIONS PARAMETERS SPECIFICATIONS AND REMARKS UNITS
Electrical characteristics
Model RKMA-P-1 RKMA-P-3 RKMA-P-4 RKMA-P-2 Frequency range, fO 32.000…48.000 kHz Resonance resistance typ./max., Rr 120; 150 / 200 150; 200 / 250 k Ω Drive Level max., DL 4.0 µW Insulation Resistance min. 400 M Ω Motional characteristics f(P)=fO +A1*P +A2*P2+ A3*P3, There: f(P) – crystal frequency at pressure P (Hz), fO – crystal’s frequency at zero pressure (Hz), P – pressure (MPa), A1 – Linear coefficient = Sensitivity A2, A3 –second and third order coefficients. Nonlinearity less than 0.4% FS.* Operation conditions Model Pressure range, P MPa UNIT Sensitivity (Linear coefficient A1) UNIT Overall dimensions UNIT RKMA-0.1-2 0 – 0.10 MPa 5515.45 ± 5…20%FS Hz/MPa 11 x 12 x 0.74 mm RKMA-10.0-1 (3) 0 – 10.0 MPa 160.06 ± 5…20%FS Hz/MPa 25 х 23 х 5,15 (7,1) mm RKMA-16.0-1 (3) 0 – 16.0 MPa 127.51 ± 5…20%FS Hz/MPa 25 х 23 х 5,6 (7,5) mm RKMA-25.0-1 (3) 0 – 25.0 MPa 58.76 ± 5…20%FS Hz/MPa 25 х 23 х 6,1 (8,1) mm RKMA-60.0-1 (3) 0 – 25.0 MPa 33.30 ± 5…20%FS Hz/MPa 25 х 23 х 6,1 (8,8) mm Operating temperature, TOPR (typ/max) -55…+80 / -40…+100; -269…+250** °C Storage temperature, TSTR -55…+85 °C Maximum deviation over temperature 0.75 % Relative deviation of the linear coefficient A1 from its average value ± 5… ± 20 % Aging first year/next years max. ± 5 / ± 25 ppm FS Pressure Hysteresis < 0.02 % Reproducibility of temperature dependence of the crystal frequency fT=fO +B1*T +B2*T2 0.05 % Vibration resistance, ∆f/f0 5g / 50-2000 Hz, 8 hours / ±7 ppm max. ppm *A1, A2 and A3 coefficients are specified on request. **Temperature range can be increased from -269 to +250 °C on request. Temperature sensing quartz crystal RKT206 is used for compensation of a temperature deviation of RKMA-P.
www.AXTAL.com Wasemweg 5 page 2(2) fon: +49 (6261) 939834 D-74821 Mosbach fax: +49 (6261) 939836 Germany E-mail: info@axtal.com G m b H&C o .K G 23.00±0.10 25.00±0.10 2 3 PACKAGE DIMENSIONS Four basic package variants of RKMA-P are available: RKMA-P-1: basic model for direct fastening on the transducer case. RKMA-P-2: Small size variant of RKMA-P-1 (see “Operation Conditions” table). RKMA-P-3: With additional cover, glued to surface, for temperature isolation. RKMA-P-4: With metal connecting pipe, through which the pressure is guided. UNITS: millimeters RKMA-P-1 (LxWxH=25x23xH) RKMA-P-2 (LxWxH=11x13x0,74) RKMA-P-3 RKMA-P-4 23.00±0.1 25.00±0.1 25.00±0.1 23.00±0.1 1- Cover; 2- Gasket; 3- Diaphragm; 4- Contact surfaces.