Teledyne 6750 operating instructions Installing Calibration Adapter, Ndir Service

Total Organic Carbon Analyzer Maintenance

Figure 5-3: Installing Calibration Adapter

5.To set IR “Zero”, flow 200cc/minute oxygen (or CO2- free air) for 5 minutes. Allow NDIR reading to stabilize. Select [ZERO]. NDIR reading is reset to 0.

6.To set IR “Span” for the 6 inch (shorter) IR bench, use a

gas calibration standard mixture of 1% CO2 in pure nitrogen. For the longer (15 inch) bench, a gas mixture

of 0.1% CO2 in pure nitrogen is required for. Flow 200 cc/minute of this cal gas for at least three minutes. Allow NDIR reading to stabilize and then select [SPAN]. NDIR reading is set to 10,000. Select [OK] to save or [CANCEL] to reject the calibration setting.

The NDIR unit has now been properly calibrated. Reconnect the fitting to reactor output tube.

5.3.2 NDIR Service

To remove and service the NDIR, simply follow the illustrated sequence as described in this section following Figure 5-4.

Teledyne Analytical Instruments 47