7070iX TRO Analyzer
Calibration and Validation | 25
13. If performing a 1-point calibration, jump to the calibration
summary screen. For 2-point calibration, we follow the
screen for Standard solution 2 (higher concentration) by
swapping the standard solution 2 flask in the place of the
standard solution 1.
Figure 33. Place Sensor in the Solution 2
14. Wait until a steady reading is obtained on the monitor.
This can be easily seen on the monitor; allow at least
100 mL of the standard to run through.
15. After a steady reading is obtained, input the calibration
value by selecting and pressing enter.
Figure 34. Input the Calibration Value
16. Enter the calibration value with arrow keys, left / right
arrow key to highlight the digital need to be changed,
up / down arrow key to change the value. Press enter to
continue.
Figure 35. Enter the Calibration Value
17. Wait until screen prompts next step.
Figure 36. Wait for Next Step
18. While calibration is finished, calibration results will shown
on the screen and store in calibration log.
Figure 37. Calibration summary screen
19. Turn the three-way valve to the left, so that the monitor is
drawing sample from the inlet block. The monitor is now
calibrated and set for continuous, unattended operation.
Figure 38. Sample from the inlet block
20. Recalibration will be necessary should the TRO
electrodes be changed or the reagent replaced. Refer to
the calibration notes in section
Monthly Maintenance.
