MKS 275420-1-GQ-T-00011, Instruction Manual

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3 Installation
18 Series 275 Convectron Module with DeviceNet
Instruction Manual - 275502
Figure 3-1 Recommended Convectron Gauge Orientation
3.2.1 Important Precautions for Mini-Convectron Installation
The following precautions in the use and installation of the Mini-Convectron must be observed.
•
It is recommended that the Mini-Convectron be installed with the port oriented vertically
downward to ensure that no system condensates or other liquids collect in the gauge tube. The
gauge tube axis must be horizontal if it is to be used at pressures above 1 Torr. Although the gauge
tube will read correctly below 1 Torr when mounted in any position, erroneous readings will result
at pressures above 1 Torr if the gauge tube axis is not horizontal.
•
Do not mount the Mini-Convectron in a manner that will allow deposition of process vapors on
the internal surfaces of the gauge tube, may occur through line-of-sight access to the interior of
the gauge tube.
•
Do not install the Mini-Convectron where high amplitudes of vibration are present. Excessive
vibration will cause forced convection at high pressure giving erroneous readings.
•
Do not use a compression mount (quick connect) for attaching the Mini-Convectron to the system
in applications resulting in positive pressures in the gauge tube. Positive pressures might blow the
gauge tube out of a compression fitting and damage equipment and injure personnel. Pipe thread
or flange mounting systems should be used for positive pressure applications. In any case, the
absolute pressure in the gauge tube should not exceed 1000 Torr.
•
The Platinum Sensor in the gauge is fragile; handle the gauge carefully.
•
Do not perform electrical continuity tests on the Mini-Convectron gauge tube with instruments
applying voltages in excess of 1 volt when the gauge tube is at vacuum, or 5 volts when at
atmospheric pressure. Exceeding these voltages will damage the sensing element.
•
Keep the gauge tube clean. Do not remove the mounting port cover until you are ready to install
the gauge tube.
•
Do not bake the Mini-Convectron at temperatures exceeding 85 °C.