Teledyne OT-2 operating instructions Sample System Component Locations

Model OT-2 System Operation 3

The span gas cylinder must be equipped with a pressure regulator with a metallic diaphragm. The regulator should be set to approximately 3-5 psig. Rotate the selector valve (a) to the span position and observe the flow meter (b) which should indicate a flow of about 0.4 scfh. For calibration purposes the flow can be increased to as much as 1 scfh in order to reduce the time re- quired to stabilize.

Allow the span gas to pass through the O2 sensor until the reading has stabilized (approx. 10 min.). The O2 transmitter can then be adjusted (see instructions elsewhere in this section) to match the analyzed content of the span gas. When the calibration is complete, return the selector valve (a) to the sample position and readjust the flow valve (c), (if necessary) so that flow meter

(b) reads 0.4 scfh.

Figure 3-5 Sample System Component Locations

Teledyne Analytical Instruments 3-7