Teledyne operating instructions Operation Model OT-2 System

3 Operation Model OT-2 System

To connect gas lines to the Model OT-2 System:

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 1/8 turn beyond finger-tight.)

2.Hold the fitting body steady with a wrench, and with another wrench rotate the nut another 1-1/4 turns.

All gas connections, Sample In, Sample Return and Span Gas In are made at the connectors located on the left side of the system enclosure as shown in Figure 3-2.

SAMPLE IN: The gas connection for the sample is made at the SAMPLE IN connector.

The internal gas pressure regulator is factory preset to approxi- mately 3 psig which will keep the system flowmeter reading in an acceptable range (0.1-1 scfh). The sample in pressure can be 6-40 psig.

SAMPLE RETURN: 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.

SPAN GAS IN: This is the port for inputting span gas and zero gas. The span gas source should be regulated at 3 psig.

3.1.3.2 Electrical Connections

All electrical connections for the OT-2 System are made on a terminal blocks in the transmitter box located on the inside of the system enclosure, see Figure 3-3.

1.To access the terminal block remove the four screws securing the transmitter box cover and remove it.

2.Connect the 4 wires and shield to the terminal block as shown in Figure 3-4.

3.Replace the cover and screws.

For safe connections, ensure that no uninsulated wire extends outside of the connectors they are attached to. Stripped wire ends must insert completely into terminal blocks. No uninsulated wiring should be able to come in contact with fingers, tools or clothing during normal operation.

3-4 Teledyne Analytical Instruments