Calibration Verification - Hach FT660 sc Manuel D'utilisation De Base

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
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.
Q-Pulse Id VM277
Vendor Manual Hach A090-070427-003 FT660 SC User Manual
Figure 7.
Active 09/09/2013
Figure 7 Calibrate the instrument
1 Head assembly
®
2 800 mNTU StablCal Certified
Standard
3 Bubble trap

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.
4 Funnel
5 Body of the instrument
6 Bubble trap cover
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