HF scientific 19998 Triple Validation Turbidimeter - 0-100 NTU - Manual (Page 18)

TVT 1 (5/02) 12
Rev. 2.6 (.pdf)
row of the display and then press the
↵ ↵↵ ↵
button to initiate calibration.
Both the CAL and STORE blocks will flash during the operation and the word YES
will change to a count down starting at 90.
When the calibration procedure for the 10.0 NTU level is complete the CAL and
STORE blocks will stop flashing. You will see the following on the display:
11. Then, you will see the following on the display:
12. Drain the 10.0 NTU calibration standard from the sample well and rinse the well at least
twice with 0.02 NTU water.
13. Fill the well with 0.02 NTU water and then place the black cleanout plug on the sample well
(to block light).
14. Press the
↵ ↵↵ ↵
button to indicate to the instrument that you wish to calibrate on the 0.02 NTU
calibration level. Once you have pressed the
↵ ↵↵ ↵
button, the current reading will be actively
displayed on the LCD display. Wait for the reading to stabilize, once the reading has
stabilized press the
↵ ↵↵ ↵
button again. The word CAL will appear on the upper row of the LCD
display and the word NO will appear on the lower row of the LCD display.
15. This is the final step for calibration on the 0.02 NTU level; if you wish to exit without