MKS Series 275 MiniConvectron, Instruction Manual

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Chapter 2
16
Mini-Convectron Module Instruction Manual - 275513
2.2 Installing Pressure Relief Devices
Before you install the module, install appropriate pressure relief devices in the vacuum system.
MKS does not supply pressure relief valves or rupture disks. Suppliers of pressure relief valves and
pressure relief disks can be located via an on-line search.
Confirm that these safety devices are properly installed before installing the product.
2.3 Installation Procedure
The module installation procedure includes the following steps:
1. Locate and orient the module.
2. Attach the module vacuum chamber fitting to its mate on the vacuum chamber.
3. Assemble and connect module wiring.
4. Configure the setpoint relays to the desired voltage levels.
5. Calibrate the Convectron gauge at atmospheric and vacuum pressures.
2.3.1 Locate and orient the module
To locate and orient the module, refer to Figure 2-3, Figure 2-4, and Table 2-1, and follow the
instructions below.
2.3.1.1 Locate the Module
• For greatest accuracy and repeatability, locate the module in a stable, room-temperature
environment. Ambient temperature should never exceed 40 °C (104 °F) operating,
non-condensing, or 85 °C (185 °F) non-operating.
• Locate the module away from internal and external heat sources and in an area where ambient
temperature remains reasonably constant.
• Do not locate the module where it requires long lengths of tubing or has constricted tubing.
Over-Pressure Conditions
Operating the module above 1000 Torr (1333 mbar, 133 kPa)
true pressure could cause pressure measurement error or
product failure.
To avoid measurement error or product failure due to
over-pressurization, install pressure relief valves or rupture
disks in the system if pressure exceeds 1000 Torr (1333 mbar,
133 kPa).
Over-Pressure Conditions
Failure to use accurate pressure conversion data for N
2
or air to
other gases can cause an explosion due to over-pressurization.
If the module will measure any gas other than N
2
or air, before
putting the module into operation, adjust setpoint relays for the
process gas that will be used.