Fisher Scientific accumet XL150 accumet XL200 accumet XL250 accumet XL500 accumet XL600 Reference Manual page 47

One Point Manual Standardization – mg/L or % Saturation:
A one point automatic standardization for mg/L assumes the dissolved oxygen level is at saturation
(8.26 mg/L or 100 % at 0 ppt salinity, 25.0 °C and 760 mmHg).
1. Power on the XL600, connect the 13-620-SSP probe and allow ≥10 minutes for warm up.
2. Insert DO probe into a BOD bottle filled with 1 inch of water to provide a 100 % relative
humidity environment.
3. From DO mg/L or % measurement screen, select Standardize.
4. The XL600 will blink a beaker icon without a value before the keypad pops up. Enter the desired
mg/L or % value then select Enter.
5. When STABLE appears, select Confirm. The meter will return to the measurement screen upon a
successful standardization.
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