Teledyne 356WA instruction manual Sample Connections, Typical System Layout

3 Installation Model 356WA

Recorder		Signal Leads
	(22 ga. Twisted
		Pair Shielded
			Cable)

115 VAC Power and Ground

2 Power Leads

1 Ground Wire

Percent Oxygen

Analyzer

Vent

Sample

In

1/4" Tubing

Sample Line

(1/4" or 1/8" Metal Tubing)

Pressure	Shut Off
Regulator	Valve
(5-10 psig Output)
Vent

Sample

Line

(16 ga. Insulated)

Condensate Trap

Figure 2-1 Typical System Layout

The connections include a terminal for grounding the analyzer case and chassis in accordance with accepted industrial practices. The maximum power requirement is less than 1½ amperes at 115 VAC.

3.3 Sample Connections

The sample line is connected at the back of the analyzer case as de- picted in Figure 2-3. Use care in assembling any part of the sampling system to avoid leaks. Oxygen can diffuse into the system through small leaks even when sample pressure is much greater than atmospheric pressure. A 1/8" female NPT fitting is installed on the back of the instrument for making sample and vent line connections. Thepurge line is fitted with a 1/4" tube fitting.

1.Connectors. Use straight tube connectors where possible. This facilitates removal of the analyzer section from the case during maintenance or service.

2.Lines. Lines should consist of metallic tubing, since oxygen can diffuse through plastic. Use continuous tubing where possible.

3.Vent. The analyzed sample is vented through the back of the unit as shown in Figure 2-3.

3-2 Teledyne Analytical Instruments