3 Installation | Model 3000PA | |
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The unit is manufactured with 1/4 inch tube fittings. Six millimeter adapters are supplied for metric system installations. For a safe connection:
1.Insert the tube into the tube fitting, and
2.Hold the fitting body steady with a backup wrench, and with another wrench rotate the nut another 1 1/4 turns.
SAMPLE IN: In the standard model, gas connections are made at the SAMPLE IN and EXHAUST OUT connections. Calibration gases must be Tee'd into the Sample inlet with appropriate valves.
Ensure that the gas pressure is reasonably regulated. Pressures between 3 and 40 psig are acceptable as long as the pressure, once established, will keep the front panel flowmeter reading in an acceptable range (0.1 to 2.4 SLPM). Exact figures will depend on your process.
If greater flow is required for improved response time, install a bypass in the sampling system upstream of the analyzer input.
Note: If the unit is for vacuum service, the above numbers apply instead to the vacuum at the EXHAUST OUT connector, de- scribed below, with minus signs before the pressure readings.
EXHAUST OUT: Exhaust connections must be consistent with the hazard level of the constituent gases. Check Local, State, and Federal laws, and ensure that the exhaust stream vents to an appropriately controlled area if required.
Note: If the unit is for vacuum service, see Sample In, above, for gas pressure/flow considerations.
ZERO IN and SPAN IN (Optional): These are additional input ports for span gas and zero gas. There are electrically operated valves inside for automatic switching between sample and calibration gases. These valves are under control of the 3000P Electronics. They can be externally controlled only indirectly through the Remote Cal Inputs, described below.
Pressure, flow, and safety considerations are the same as prescribed for the SAMPLE IN inlet, above.
3.3.2 Electrical Connections
For safe connections, ensure that no uninsulated wire extends outside of the connectors they are attached to. Stripped wire ends must insert com- pletely into terminal blocks. No uninsulated wiring should be able to come in contact with fingers, tools or clothing during normal operation.
Teledyne Analytical Instruments |