info@biopac.com
support@biopac.com
www.biopac.com
BIOPAC Hardware | SS69L | Page 4 - 4 Updated: 3.28.2013
CONVERSION FORMULA FOR % SATURATION
Set CAL 1 Input to 0% and CAL 2 Input to 100%, and then use the following formula to enter the Values:
% Saturation = (actual DO
2
result / Saturated DO
2
value from Table 1) x 100
For example, if the probe result is 6.1 mg/L at a temperature of 20ºC and a pressure of 740 mmHg, the
corresponding Table 1 value is 8.93 mg/L, so % Saturation = ( 6.1 / 8.93) x 100 = 68%
Recording
c. Place the tip of the probe into the sample to be measured. Submerge the tip about 4-6 cm (2”).
d. Gently stir the probe in the sample. IMPORTANT: Keep stirring the probe in the sample—water
must always be flowing past the probe tip for accurate measurements. As the probe measures the
concentration of dissolved oxygen, it removes oxygen from the water at the junction of the probe
membrane. If the probe is left still in calm water, reported dissolved O
2
measurements will appear to
be dropping.
Storage
<
24 hours: Store the probe with the membrane end submerged in about 3 cm (1”) cm of distilled water
> 24 hours: Remove the membrane cap, rinse the inside and outside of the cap with distilled water,
and then shake the membrane cap dry. Rinse the exposed anode and cathode inner elements, and then blot
dry with a lab wipe. Reinstall the membrane cap loosely onto the electrode body for storage—do not
tighten.
Polishing
The anode or cathode inner elements become discolored or appear corroded, use the polishing strips
provided (once a year is generally sufficient). Contact BIOPAC for polishing details if necessary.
To Next Page
Loading...