3 Installation
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Series 275 Mini-Convectron Module with DeviceNet
Instruction Manual - 275563
• Do not install the Mini-Convectron where it will be subject to corrosive gases such as mercury
vapor or fluorine which will attack the gold plated sensor.
• Do not use the Mini-Convectron to measure pressures of explosive gases.
• For greatest accuracy and repeatability the Mini-Convectron should be located in a stable room
temperature environment.
• All connections to the unit are to be made with shielded cable or cables. The shield or shields
are to be connected to the connector shell.
3.3 Mini-Convectron Module Installation
Before installing the Mini-Convectron Module, install appropriate pressure relief devices in the
vacuum system. Granville-Phillips does not supply pressure relief valves or rupture disks. Suppliers
of pressure relief valves and rupture disks can be located via an internet search or the Thomas
Register under “Valves, Relief” and “Discs, Rupture."
Dimensions of the Mini-Convectron Module are given in Figure 2-2 on page 15.
Cleanliness pays. Keep the port cover in place until moments before installation.
For proper operation above about 1 Torr, install Mini-Convectron Modules with the gauge axis
horizontal. See Figure 3-1. Although the gauge will read correctly below 1 Torr when mounted in
any position, erroneous readings will result at pressures above 1 Torr if the gauge axis is not
horizontal.
Orient the gauge to prevent condensation of process vapors on the internal surfaces through
line-of-sight access to its interior. If vapor condensation is likely, orient the port downward to help
liquids drain out of the gauge.
Vibration causes convection cooling of the sensor and will result in high pressure readings. Mount
Mini-Convectron Module where it will not vibrate excessively.
Operating the module above 1000 Torr (1333 mbar, 133 kPa) true
pressure could cause pressure measurement error or product failure.
Install suitable devices that will limit the pressure to the level that the
vacuum system can safely withstand. In addition, install suitable pressure
relief valves or rupture disks that will release pressure at a level
considerably below the pressure that the system can safely withstand.
Figure 3-1 Recommended Convectron Gauge Orientation
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