Emerson Clarity II Instruction Manual page 46

MODEL CLARITY II
Bad Dark cal.
SN Live 20.18NTU
Stablilizing
Live 20.18NTU
SN Cal 2 2 0.10NTU
SN Live 20.00NTU
Cal Complete
Calibration
Error
Slope too high
Continue? Yes
Slope too low
Continue? Yes
38
If the dark current is too high, the screen at left appears. Be sure the sen-
sor is squarely and securely seated in the calibration cup. Press EXIT and
repeat the calibration. If the dark current measurement is acceptable, the
screen in step 9 appears.
9. The turbidity value in the first line is turbidity of the 20.0 NTU standard
based on the previous calibration. Stabilizing flashes until the reading is
stable.
10. Once the reading is stable, the screen at left appears. The turbidity value
in the first line is the apparent turbidity based on the previous calibration.
The turbidity value in the second line is the measured turbidity at the time
the reading became stable. Use the arrow keys to change the value to
match the turbidity of the standard being used. Press ENTER.
11. The screen at left shows the calibration was successful. Press ENTER.
The display returns to one of the screens in step 4. To return to the main
display, press MENU then EXIT.
12. If a calibration error occurred, one of the screens at left appears.
Calibration error means that zero was entered in step 10 — the analyz-
er attempted to divide by zero. Slope too high or Slope too low implies
the wrong value was entered in step 10 or the standard solution has dete-
riorated and does not have the expected value. For additional trou-
No
bleshooting information, see Section 8.3.2.
If Calibration error is showing, the analyzer retains the existing calibration.
No
To attempt a recalibration, press ENTER. The display returns to step 6. If
Slope too high or Slope too low is showing, choose Yes to update the
calibration or choose No to repeat the calibration.
SECTION 6.0
CALIBRATION