EUTECH INSTRUMENTS WATERPROOF CYBERSCAN PD 300 PHDISSOLVED OXYGEN METER, Инструкция по эксплуатации, Страница: 15 / 66

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4.4 Dissolved Oxygen Calibration in % Saturation
You can calibrate this meter quickly and easily in air. The exact calibration value depends on
barometric pressure. The meter is set to a factory default of 760 mm Hg, which results in a
calibration value of 100% saturation in air.
NOTE: If the barometric pressure setting has been changed from 760 mm Hg, the
calibration value in air will automatically adjust to a value other than 100%. The
adjusted value will be correct for the new barometric pressure setting.
See page 33 to change the pressure setting. See Addendum 2
on page 57 for a table of adjusted % saturation values.
To calibrate 100% Saturation:
1. Rinse the probe well with deionized rinse water. For best
accuracy, wrap the end of the probe in a damp cloth. Do not
touch the membrane.
2. Press the MODE key to select the % saturation mode.
3. Press the CAL key. The CAL indicator will appear above the
primary display. The primary display shows the current value
of the measurement and the secondary display will show
100.0. See figure 9.
4. Hold the probe in the air. Wait for the reading to stabilize. If
the READY indicator feature is enabled, it will appear when
the reading is stable.
5. Press the ENTER key. The meter automatically calibrates to
100.0% air saturation and returns to Measurement mode.
6. See Figure 9
NOTES:
Whenever an error occurs during calibration, the ERR indicator
appears in the lower left hand corner of the display.
You can offset your % DO calibration. See page 36 for
directions.
Figure 9: To calibrate for
100% saturation