ATC Active Thermocouple Gauge
ATC Active Thermocouple Gauge
Overview
Edwards Active Thermocouple Gauge (ATC-E) is suitable for measuring from 50 to 10-3 Torr, with integral set-point for OEM use and LED indication of vacuum status.
The ATC-E mounts directly onto either ATC-D or ATC-M thermocouple tubes to form a compact stand-alone transducer to simplify the system design and save valuable racking space. The ATC-E electronics module drives both medium and low pressure gauge tubes, providing a cost effective measuring solution for higher pressures.
Active thermocouple gauges are ideally suited where a simple rugged gauge is required to measure higher pressures.
The ATC-E mounts directly onto either ATC-D or ATC-M thermocouple tubes to form a compact stand-alone transducer to simplify the system design and save valuable racking space. The ATC-E electronics module drives both medium and low pressure gauge tubes, providing a cost effective measuring solution for higher pressures.
Active thermocouple gauges are ideally suited where a simple rugged gauge is required to measure higher pressures.
Technology
Thermocouple gauges are similar to Pirani gauges except that the temperature of the filament is measured by a thermocouple. The filament is heated and the cooling effect of the gas present gives an indication of the pressure. The junction of a thermocouple is held very close to the filament by a small glass bead and as the temperature of the filament changes a voltage is induced across the thermocouple. The electronics module consists of a power supply for the filament and measuring circuit for the thermocouple output.
Thermocouple gauges are gas dependent.
Thermocouple gauges are gas dependent.
Features and Benefits
- Drive electronics mount directly on the gauge tube which simplifies the system design and saves valuable rack space
- Wide range, regulated, internal power supply runs from standard d.c. power supplies from +13.5 to +36 V and is tolerant to voltage fluctuations
- Standard analogue outputs of 0 to +10 V d.c. and gauge identifier allows for easy interface with a computer or PLC and provides fault output indication
- Adjustable set-point with vacuum status LED can be used for process control and interlocking and includes a digital vacuum status signal with set-point level ready visually
- Low output impedance and integral Faraday shield provides a high level of noise immunity and permits long cable runs of up to 100 meters
- Choice of medium and low pressure gauge tubes. The ATC-D covers from 50 to 5 x 10-2 Torr while the ATC-M covers from 1 to 10-3 Torr
Applications
- Active thermocouple gauges are ideally suited to applications where a simple rugged gauge is required to measure higher pressures.
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