Trace2O HydroCheck HC1000, Instruction Manual

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9.1 DO Calibration in mg/L or ppm Mode
9.1.1 Press MODE key until the meter shows
indicator and measurement unit “mg/L”
or “ppm”.
9.1.2 Ensure that 1 point calibration is selected in the setup menu.
9.1.3 If necessary, set the salinity and atmospheric pressure coefficient in the setup menu
(Refer to Setup Menu section).
9.1.4 Press CAL key, the display shows
“8.25mg/L/CAL1” (@25 o
C).
9.1.5 Dip the dissolved oxygen probe into the air-saturated water for 3 to 5 minutes.
9.1.6
Press ENTER key to confirm, “Calibration” indicator begins flashing.
9.1.7 Wait for the measured value to stabilis
e, the display shows “END”. Once calibration is
complete, the meter returns to measurement mode automatically.
9.2 2 Point Calibration:
9.2.1 Make sure that you have selected 2 points calibration in the setup menu.
9.2.2
Press CAL key, the meter shows “8.25mg/L/CAL1” (@25 o
C).
9.2.3 Press
▲ or ▼ key until the display shows “0.00mg/L/CAL1”.
9.2.4 Immerse the dissolved oxygen probe into the saturated anhydrous sodium sulfite solution
(zero oxygen solution). Stir the solution gently.
Enter
MI
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