Teledyne 9700 instruction manual Operation

4 Operation Model 9700

(6)After air has been flowing for a couple of minutes, adjust the ZERO control on the control unit (use the small screwdriver supplied) until the meter pointer lines up with the zero mark on the dial (be sure that the mechanical zero of the meter is first adjusted with the power off.)

(7)Turn on supply of span gas and open the SPAN toggle valve. Then adjust the SPAN flow control valve until a flow rate of 2–3 SCFH is indicated on the right hand flowmeter.

Note: Flow rate of span gas should be set to match that of the air as closely as possible. It does not matter what they read as long as they are both the same.

(8)Adjust the SPAN control with the small screwdriver until the meter pointer reads the analyzed value ot the span gas.

(9)If only a very small or no adjustment was required, no further calibration should be needed. If, however, a fairly large adjustment was made, the ZERO adjustment should be rechecked and readjusted, as necessary. If ZERO readjustment was made, check the SPAN adjustment again.

(10)Adjust alarm setpoint to the desired level. The alarm is adjusted by turning ZERO control until the meter reads the desired alarm point. The ALARM level control is then adjusted until the alarm light just comes on. The ZERO control must then be reset to produce a zero reading.

(11)Once the above adjustment has been made, the unit is ready for service.

(12)After calibration is completed, re-establish sample flow and be sure the flow rate is set to match that which was used for span gas.

4-6 TELEDYNE BROWN ENGINEERING

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