The Barocel 622 is field proven bakeable capacitance manometer vacuum/pressure transducer. The signal conditioning electronic components are separated from the sensor, allowing it to be operated at 200°C as required by some applications. Among these applications are processes involving condensable gases, some nuclear processes, and those requiring high temperature sterilization.
The sensor employs the same high performance features found in the Model 600. A temperature sensor within the transducer head provides zero sensitivity compensation to maintain accuracy over a wide temperature range. Removable connectors at the electronics package help simplify installation. An integral vacuum reference of all-welded construction contains gettering material to ensure long term stability and eliminates the need for reference vacuum pumps.
In vacuum systems, the Model 622 is the solution where traditional instruments such as McLeod, Pirani, or thermocouple gauges are unable to operate. Since pressure is sensed by displacement of a thin metal membrane, calibration accuracy is unaffected by the chemical composition of input media.
Dirty, corrosive and radioactive gases such as tritium may be monitored without affecting accuracy because the electrically active portion of the sensor is contained in the sealed vacuum reference which is isolated by the taut metal diaphragm.
The transducer's analogue output is linearly proportional to pressure, and may be recorded by data acquisition systems, read directly on a high-resolution digital voltmeter, or by Edwards power supply/readouts.
Sensor bakeable and operable to 200°C
High accuracy 0.15% of reading
Small overpressure effect repeats within 0.01% full scale after being exposed to 35 psia
Stable zero reference
Fully temperature compensated
High resolution to better than 0.01% full scale
True total pressure reading independent of gas composition
High level DC output 0-10 volts, full scale
Pressure ranges:
0-10, 0-100, 0-1000 torr 0-10, 0-1000, 0-1000 mbar Ranges to 10,000 torr also available
Overpressure effect:
Repeats within 0.01% full scale after 35 psia exposure
Accuracy:
0.15% of reading standard, 0.5% of reading also available
Material exposed to pressure media:
Inconel and Monel
Resolution:
Better then 1:10 4
Internal volume:
8.3 cm 3 including 1/2” dia. tube
Operating temperature:
0 to 200°C (sensor)
0 to 65°C (signal conditioner)
Time constant:
8 msec
Temperature effect on zero:
Less than 0.005% full scale /°C
Output signal:
0-10 VDC, linear with pressure
Temperature effect on sensitivity:
Less than 0.02% reading /°C
Power requirements:
15 VDC ±5% regulated to
± l % at 30mA
Overpressure without damage:
1.25 times full scale range or 35 psia, whichever is greater
RFI suppression:
Standard on all models
Weight:
2.9 lb (1.3 kg)
Displays and Controllers for use with the model 622
모델명 : Model 622
