275 Mini-Convectron® Vacuum Transducers
Model: 275
275 Mini-Convectron® Vacuum Transducers
Model: 275

Overview
Overview
The 275 Mini-Convectron® Module combines the high precision convection enhanced Pirani gauge with electronics to provide a compact, convenient, reliable, and cost-saving solution for vacuum measurement from atmosphere to 10-4 Torr. With over 35 years of successful field installations, the Convectron® gauge has become an industry standard. It is a unique variation of thermal conductivity gauges where pressure measurement is based on the rate of heat loss from a sensor wire. Unlike traditional thermocouple and Pirani gauges that use only conductive heat loss, Convectron gauges take advantage of heat loss due to convection at higher pressures. This extends the range of accurate, repeatable measurement to atmosphere. Modules are available with analog output, RS485 interface, and DeviceNet interface. These Granville-Phillips® vacuum gauges are ideal for applications where controller size and local control are critically important.
Technical Specs
- Absolute Measurement Range1.0 x 10-4 to 1000 Torr
- Digital CommunicationRS485
- TypeVacuum Module
- DisplayNo
- InterfaceDeviceNet
- Relays2
- Fitting Type8 VCR female
- Installation OrientationHorizontal preferred
- Set Point Range1x10-3 to 1000 Torr, 1x10-3 to 1300 mbar, 1x10-1 Pa to 130 kPa
- Operating Temperature0 - 40°C ambient, non-condensing
- Maximum Bakeout Temperature150°C with electronics removed
- Storage Temperature-40 - 70°C
- Digital ControlsVacuum and atmosphere calibration, set points (value, direction and hysteresis)
- Analog Output0.375-5.659 VDC (0-1000 Torr Non-linear)
- Relay Resolution2 significant digits
- Power RequirementsDeviceNet: 11 - 26 VDC, 0.5 Amps at 11 VDC, 2.5 Watts max, analog: 11.5 - 26.5 VDC, 0.1 Amps at 11.5 VDC, 1.6 Watts maximum, 1.8 maximum (with display), RS485: 11.5 - 26.5 VDC, 0.12 Amps at 11.5 VDC, 2 Watts max
- Internal Volume40 cm3 (2.5 in3)
- Exposed Materials304 stainless steel, borosilicate glass, Kovar, alumina, NiFe alloy, polyimide
- Electronic Casing and FlangeAluminum extrusion
- ComplianceCE
- FilamentPlatinum
- Set Point Contact Rating1 Amps at 30 VDC resistive, AC non-inductive
- Set Point ConfigurationSingle-pole, double-throw (SPDT)
- Set Point AdjustmentsValue, direction, and hysteresis through software
- Connectors9 or 15-pin subminiature-D male, high density: 5-pin Micro DeviceNet
- Display ResolutionLeast significant digit on each range
- UnitsPa
- Digital Output ResolutionLeast significant digit on each range
- Digital Baud Rates300-115.2K, 19200 Baud (default value)
- Digital Data FormatASCII, 8 data bits, one stop bit, no parity, no handshake (default values)
- Device TypeVacuum/pressure gauge device
- DeviceNet MessagingPolled I/O and explicit
- DeviceNet Adjustable ParametersVacuum and atmosphere calibrations, set points
- DeviceNet Address0 - 63, selected by using the Low and High address switches
- DeviceNet Connector5-pin Micro
- DeviceNet Baud Rates125K, 250K, or 500K, switch selectable
- Step Size at Minimum Pressure1 x 10-4 Torr, 1 x 10-4 mbar, 1 x 10-2 Pa
Technical Specs
- Absolute Measurement Range1.0 x 10-4 to 1000 Torr
- Digital CommunicationRS485
- TypeVacuum Module
- DisplayNo
- InterfaceDeviceNet
- Relays2
- Fitting Type8 VCR female
- Installation OrientationHorizontal preferred
- Set Point Range1x10-3 to 1000 Torr, 1x10-3 to 1300 mbar, 1x10-1 Pa to 130 kPa
- Operating Temperature0 - 40°C ambient, non-condensing
- Maximum Bakeout Temperature150°C with electronics removed
- Storage Temperature-40 - 70°C
- Digital ControlsVacuum and atmosphere calibration, set points (value, direction and hysteresis)
- Analog Output0.375-5.659 VDC (0-1000 Torr Non-linear)
- Relay Resolution2 significant digits
- Power RequirementsDeviceNet: 11 - 26 VDC, 0.5 Amps at 11 VDC, 2.5 Watts max, analog: 11.5 - 26.5 VDC, 0.1 Amps at 11.5 VDC, 1.6 Watts maximum, 1.8 maximum (with display), RS485: 11.5 - 26.5 VDC, 0.12 Amps at 11.5 VDC, 2 Watts max
- Internal Volume40 cm3 (2.5 in3)
- Exposed Materials304 stainless steel, borosilicate glass, Kovar, alumina, NiFe alloy, polyimide
- Electronic Casing and FlangeAluminum extrusion
- ComplianceCE
- FilamentPlatinum
- Set Point Contact Rating1 Amps at 30 VDC resistive, AC non-inductive
- Set Point ConfigurationSingle-pole, double-throw (SPDT)
- Set Point AdjustmentsValue, direction, and hysteresis through software
- Connectors9 or 15-pin subminiature-D male, high density: 5-pin Micro DeviceNet
- Display ResolutionLeast significant digit on each range
- UnitsPa
- Digital Output ResolutionLeast significant digit on each range
- Digital Baud Rates300-115.2K, 19200 Baud (default value)
- Digital Data FormatASCII, 8 data bits, one stop bit, no parity, no handshake (default values)
- Device TypeVacuum/pressure gauge device
- DeviceNet MessagingPolled I/O and explicit
- DeviceNet Adjustable ParametersVacuum and atmosphere calibrations, set points
- DeviceNet Address0 - 63, selected by using the Low and High address switches
- DeviceNet Connector5-pin Micro
- DeviceNet Baud Rates125K, 250K, or 500K, switch selectable
- Step Size at Minimum Pressure1 x 10-4 Torr, 1 x 10-4 mbar, 1 x 10-2 Pa
