3 installation – Teledyne 3000PAEU - General purpose percent oxygen analyzer User Manual

Page 26

3 Installation

Model 3000PA

3-4

Teledyne Analytical Instruments

The unit is manufactured with

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 finger-tighten the nut until

the tubing cannot be rotated freely, by hand, in the fitting. (This
may require an additional

turn beyond finger-tight.)

2. Hold the fitting body steady with a backup wrench, and with

another wrench rotate the nut another 1

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 serice, 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, no uninsulated wiring should be able to come in

contact with fingers, tools or clothing during normal operation.

CAUTION:

Use Shielded Cables. Also, use plugs that provide

excellent EMI/RFI protection. The plug case must be