LaMotte DO 4000 Dissolved Oxygen Meter - Manual (Page 17)

PERCENT SATURATION READING
1. Press “%SAT” button to turn meter on.
2. Set the Salinity Compensation knob to the salinity of the sample
water.
3. Keeping probe at an angle, slowly lower at least 3.5” into sample.
Tap probe against the side of the beaker to remove air bubbles. Stir
solution gently with probe until display stabilizes. If testing deeper
water, gently raise and lower probe several times to remove air
bubbles. Continue to raise and lower to avoid oxygen starvation at
the membrane.
If readings are erratic see Troubleshooting on page 18.
4. Record reading as percent (%) Saturation.
5. Press “OFF” button and turn off constant polarization unless meter
is to be used again shortly.
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