HF scientific MicroTOL Online Turbidimeter - Manual (Page 18)

MICRO TOL (5/10) 12
Rev. 4.8
5.2 Calibration Procedures
1. Select the calibration function of the instrument by pressing the MODE/EXIT button
once. The arrow beside CAL will be illuminated on the display. The lower display
shows alternating 1000 (the value of the standard that is requested) and
↵. The upper
display shows the real-time reading to allow the standard to be indexed. Refer to
section 6.1 for information on indexing cuvettes.
2. Remove the flow through unit.
3. Insert the requested 1000 NTU standard. Index the standard to the lowest value on the
upper display.
4. Press the
↵ button to accept the calibration.
5. The lower display will count down the progress of the calibration step.
6. The lower display will now change to show alternating 10 and
↵, requesting the 10.0
NTU standard.
7. If the alternating 10 and
↵ is not displayed, push the t or uuntil this display is
shown.
8. Insert the requested 10.0 NTU standard. Index the standard to the lowest value on the
upper display.
9. Press the
↵
button to accept the calibration.
10. The lower display will count down the progress of the calibration step.
11. The lower display will now change to show 02 and
↵
, requesting the 0.02 NTU
standard.