Figure 2-7: Calibration Sequence - Teledyne AX300 Operating/Service Instructions Manual

Portable Oxygen Analyzer
To calibrate the analyzer (See Figure 2-7):
1. Turn the unit on by pressing the ON/OFF (I/O) key.
2. Check the battery status via the bar graph.
3. If the LCD is not flashing, press the LOCK/UNLOCK key to unlock
the keys. LCD will flash indicating that changes can be made to the
settings. If the batteries have just been installed the LCD will flash
00.0
4. As with most oxygen analyzers, the highest level of accuracy is
achieved when calibration is conducted using 100% oxygen. After in-
stalling the flow diverter as noted in Section 2.1.1, insert the sensor
into the plastic tee and connect to a supply of pure dry oxygen flow-
ing at 1-2 liters per minute.
Note: An accessory calibration assembly (P/N C53790) is available from Teledyne for
use with the R17MED sensor
5. Wait about 20 seconds to ensure that the sample line is completely
purged with the calibration gas. Press the CAL key. The LCD will
count down from 9 to 0. The analyzer electronics will measure the
sensor output during this countdown to determine the gas concentra-
tion and selects the calibration range of either 100% or 20.9%. When
the calibration is complete, the LCD will display the gas value.
Note: At the end of the calibration countdown, the analyzer will display a solid number,
indicating acceptance of the calibration value. No further user action is re-
quired. If the LOCK/UNLOCK key is still pressed, the display will start blinking,
allowing the recalibration. If this LOCK/UNLOCK key-press is in error, either
Teledyne Analytical Instruments

Figure 2-7: Calibration Sequence

Operating Instructions
11