Hach-lange FILTERTRAK FT 660 sc User Manual Manuel d'utilisateur télécharger pdf (Page 13)

6. Put a funnel at the end of the bubble trap and slowly put 800 mNTU

StablCal Standard in the funnel to fill the body. Refer to Figure 7.

7. Put the bubble trap cover and head assembly on the body of the

instrument.

Note: If the head assembly is not correctly installed, the laser will not turn on

and the reading on the display will be near 0.000 mNTU or a negative value.

The red status light on the instrument will also flash one time per second.

8. When the turbidity reading is stable (and after greater than

5 minutes), confirm to accept the reading.

9. When the display shows "GOOD CAL! GAIN: X.XX ENTER TO

CONT.", confirm to save the turbidity value.

Note: If the display shows "BAD CAL!", confirm to do the calibration again or

exit.

10. When the display shows "VERIFY CAL?", confirm to do a calibration

verification or exit without verification.

11. Do a calibration verification or enter the operator initials to complete

the calibration.

12. When the display shows "RETURN SENSOR TO MEASURE

MODE", confirm.

Figure 7 Calibrate the instrument

1 Head assembly 4 Funnel

2 800 mNTU StablCal

Certified

Standard

5 Body of the instrument

3 Bubble trap 6 Bubble trap cover

Calibration verification

Do a calibration verification immediately after every calibration.

Subsequent verifications are referenced to the initial verification.

Do a calibration verification monthly between calibrations.

A calibration verification is a check that is done to make sure that the

instrument is working correctly and calibrated.

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Hach-lange FILTERTRAK FT 660 sc User Manual Manuel d'utilisateur Page 13