ترانسمیتر فشار مدل PA-21SR مارک KELLER

SERIES PA-21SR/MR

This new range of KELLER OEM pressure transmitters offers the user the high accuracy and stability of the KELLER piezoresistive pressure capsule in a low cost OEM package.
Applications include refridgeration, hydraulic controls, air compressors, ink jet printers, vacuum pumps etc.
The Series 21 R is offered with soldered brass transducers (Series 21 MR), soldered steel transducers (Series 21 SR) or fully welded (Series 21 R), all providing a highly stable measuring cell with negligible hysteresis, unrivalled linearity, high output and a life of millions of pressure cycles.
The transmitters are supplied with 2 metres of screened cable, or a square connector and mating plug, type mPm-193.
Accuracy is achieved by very large scale predictable production quantities of the pressure capsule (over 2 million produced today).
Reliability is assured by the inherent properties of the perfectly elastic silicon chip, and ensuring that neither the pressure media nor the reference media (in the gauge version) come into contact with any sensitive parts.
Temperature Compensation: Each unit is fully tested and compensated. Span errors are reduced by selecting the semiconductor doping levels so that the gauge factor of the strain gauges (ΔR) is constant with temperature. Thermal zero compensation is achieved by an automatic test procedure which fits a single resistor across one arm of the bridge.
Shock and vibration performance is excellent due to the silicon chip being suspended in the oil-
filled capsule. It is isolated mechanically from the body. Similarly, the effects of mounting torque are eliminated.

Spec ifications
Signal Output 4…20 mA 0…5 Vdc 1…6 Vdc 0…10 Vdc 0…100 mV
Supply Voltage 8…28 Vdc 9…28 Vdc 13…28 Vdc 8…28 Vdc 10 Vdc
Current required max. 25 mA 4 mA max. 2 mA max.
Zero/Span Tolerance 0,5 %FS 0,5 %FS 4) 0,5 %FS 0,5 %FS 4) ± 0,1 %FS
Configuration 2-Wire 3-Wire 4-Wire
Electrical Connection: OUT/GND: GND: Pin 1 / Green GND: Pin 1 / White
mPm 193 or Pin 1 / White +OUT: Pin 2 / White +OUT: Pin 2 / Red
cable 2 m, 4 core +Vcc: Pin 3/Brown +Vcc: Pin 3 / Brown +Vcc: Pin 3 / Black
-OUT
: Blue Linearity ± 0,2 % typ. / ± 0,5 % max.
Total Error Band 3) ± 0,5 % typ. / ± 1 % max. +18…+22 °C
Total Error Band 3) ± 1 % typ. / ± 2 % max.
0…+50 °C
Total Error Band 3) ± 2,5 % typ. / ± 4 % max. -20…+80 °C

Operating Temperature -20…+80 °C (on demand -40…100 °C)
Pressure Port G 1/4” male
Pressure Media Compatible with 316L stainless steel
Weight ≈ 75 g
Electromagnetic Compatibility CE marked: Fully tested to EN 61000-6-2, EN 61000-6-3, EN 61000-6-4
Enclosure Protection IP 65
Insulation > 100 MΩ / 500 Vdc
Vibration 20 g (5...2000 Hz, max. amplitude ± 3 mm), according to IEC 68-2-6
Shock 20 g (11 ms)