3 Installation | Model 3020T | |
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When the
3.5Gas Connections
Before using this instrument, it should be determined if the unit will be used for pressurized service or vacuum service and low pressure applica- tions. Inspect the restrictor kit that came with the unit. The kit consist of two restrictors and a union for 1/4” diameter tubing. Notice that the two 1 3/4” long, 1/4” diameter tubing are restrictors. It has an open end and a closed end with a small circular orifice. The restrictor without the blue sticker is for ;ow pressure and vacuum service. For high pressure (2 to 50 psig) applica- tions, use the restrictor that has a blue sticker on the body.
For pressurized service, use the restrictor without the blue dot and union from the restrictor kit and attach it to the Sample In port. The small circular orifice should face away from the back of the unit (against the direction of gas flow). Use the restrictor without the blue dot sticker in the same manner for low pressure applications (less than 5 psig).
For vacuum service
Remove the blue sticker from the restrictor before using.
WARNING: Operating the unit without restrictors can cause damage to t the
Figure 3-9 is an illustration of the Gas Connector Panel. Optional gas connections are shown in a shaded block.
The unit is manufactured with 1/4 inch tube fittings only. Adapters must be used for metric tubing. (At least 6 mm is recommended.)
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 1/8 turn beyond finger-tight.)
2.Hold the fitting body steady with a backup wrench, and with another wrench rotate the nut another 11/4 turns.
Teledyne Analytical Instruments |