10
MA300TS-0210
2. Saturated water calibration method
This calibration method follows JIS K0102. Calibration is performed using saturated water with dissolved oxygen
(hereinafter, saturated water).
Step 1. Prepare the saturated water.
Fill a beaker with water, and perform aeration. (500 mL of water must be aerated for approx. 10 to 20 minutes.)
Step 2. Change the PACK MASTER setting to “SATUR WATER”. (Perform only the first time.)
Refer to section “3. Setting the Span Calibration Method (Saturated water calibration/air calibration)” on page 8
of this manual.
Step 3. Fill the housing with saturated water.
Refer to Steps 1 to 4 in section “5. Measurement (1) Measuring a sample” on page 13 of this manual.
Step 4. Spin the stirrer and mix the saturated water in the housing.
Allow five to ten minutes for the temperature to stabilize.
If the temperature varies, it can take approximately one minute per degree Celsius to stabilize.
Step 5. When the DO MEASURE screen is displayed, press .
The MENU screen opens, and “CAL” is selected (flashes).
Step 6. Press .
The DO CAL screen opens.
Step 7. When the indicated value stabilizes, hold down for 1 second
or longer.
The stability is decided, and after approx. 10 seconds “CAL complete”
appears to indicate that the calibration is complete.
The DO MEASURE screen opens when the calibration is completed.
The calibration value is saved even if the PACK MASTER power is turned OFF, the batteries are removed, or
the AC adapter is disconnected.
If an error message appears during the calibration, refer to the “Error Messages” section on page 19 of this
manual, and the “Error Messages” section in the PACK MASTER Operation Manual.
Prepare the saturated water at the time of use, not in advance.
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