Hach FT660 sc Manuel D'utilisation De Base page 16

The baseline value is referenced for subsequent calibration verifications until the next calibration.
Note: When not in use, keep the dry standard in the protective case.
Enable the dry standard software
1. From the Main menu, select Sensor Setup, [Select Sensor], Calibrate, Verification, CVM Select,
Enable.
2. To set the pass or fail criteria to a value other than the recommended default (± 5 mNTU):
a. Select Verification, P/F Criteria.
Note: The P/F Criteria menu option is available only if CVM is set to ENABLE in step 1.
b. Use the arrow keys to change the PFC (pass or fail criteria) value and confirm.
The PFC range is 5–250 mNTU.
Assign a baseline value to the dry standard
1. After the instrument is calibrated and the operator initials have been entered, the display shows
"VERIFY CAL?". Confirm to start the verification process.
2. Select DRY for the verification type and confirm.
3. Remove the head assembly from the body of the instrument.
4. Remove the dry standard from the protective case. Refer to
5. Record the serial number of the dry standard. Refer to
6. Clean, dry and inspect the dry standard.
a. Use the disposable wipes provided to clean the dry standard.
b. Use a dry cloth to dry the top
c. Make sure that the glass of the dry standard is free of chips and scratches.
7. Install the dry standard.
a. Put the dry standard in the aperture plate. Make sure that the locking pin goes in the notch in
the aperture plate. Refer to
b. Turn the dry standard
c. Use a dry cloth to remove any fingerprints and oils from the glass of the dry standard.
8. Put the head assembly on the body of the instrument.
9. Enter the serial number of the dry standard, then confirm.
10. When the instrument reading is stable, confirm to accept the reading as the baseline value.
11. Remove the dry standard from the instrument.
a. Remove the head assembly from the body of the instrument.
b. Turn the dry standard
aperture plate.
c. Put the head assembly on the body of the instrument.
12. Confirm to go to Measurement Mode.
13. Push HOME to show the online measurements.
14. Put the dry standard in the protective case.
16 English
1
/ of the dry standard. Refer to
3
Figure 8.
1
/ of a turn clockwise until the dry standard locks in position.
8
1
/ of a turn counter-clockwise, then remove the dry standard from the
8
Figure 8.
Figure 8.
Figure 8.