NEW BRUNSWICK SCIENTIFIC BioFlo 415, Manual To Operations

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New Brunswick Scientific User’s Guide
CAUTION!
We recommend that you avoid the use of hydrochloric acid (HCl) with
the BioFlo 415 for pH control or any other purpose, because HCl
corrodes stainless steel. Over time, it will severely damage the vessel,
a costly component to replace, and other stainless steel components.
Phosphoric and sulfuric (10% maximum concentration) acids are
acceptable and are commonly used for pH control.
7.2.2 pH Probe Maintenance & Storage
If you have a liquid-filled probe, check the level of the filling solution. It
should be about 1cm below the filling orifice.
Check for any trapped air bubbles in the electrode’s tip to remove bubbles,
hold electrode upright and shake electrode gently.
The probe should be stored standing upright. The electrode tip should be
immersed in the solution of 3 molar KCl or a buffer solution between pH 4.00
and pH 7.00. If the probe is so equipped, the two rubber T stoppers should be
inserted.
CAUTION!
Never let a pH probe rest on its tip, and never leave a pH probe in DI
water.
7.3 Dissolved Oxygen (DO) Probe Preparation
7.3.1 Inspecting the DO Probe
Inspect the probe for possible shipping damage. Immediately report any
damage you may observe to the New Brunswick Scientific Service
Department.
Remove the protective cap from the electrode end. The membrane is delicate
and care must be exercised to prevent accidental damage.
NEVER REST
THE PROBE ON ITS MEMBRANE.