YSI 30 - Manual (Page 29)

SECTION 8 MAINTENANCE
8.1 CLEANING AND STORAGE
The single most important requirement for accurate and reproducible results in conductivity
measurement is a clean cell. A dirty cell will change the conductivity of a solution by contaminating
it.
NOTE: ALWAYS RINSE THE CONDUCTIVITY CELL WITH CLEAN WATER AFTER
EACH USE.
To clean the conductivity cell:
1. Dip the cell in cleaning solution and agitate for two to three minutes. Any one of the foaming
acid tile cleaners, such as Dow Chemical Bathroom Cleaner, will clean the cell adequately.
When a stronger cleaning preparation is required, use a solution of 1:1 isopropyl alcohol and
1 N HCl. Remove the cell from the cleaning solution.
2. Use the nylon brush (supplied) to dislodge any contaminants from inside the electrode chamber.
3. Repeat steps one and two until the cell is completely clean. Rinse the cell thoroughly in
deionized, or clean tap water.
4. Store the conductivity cell in the meter storage chamber.
8.2 PROBE PRECAUTIONS
Observe the following precautions to ensure accurate, repeatable results:
1. The cell must be clean before making any measurements. When working with substances having
low conductivity, extraordinary cleanliness may be required.
2. Suspend the cell in the solution deep enough to submerge the vent hole. The electrode chamber
should be free of trapped air. You may need to tap the probe gently to dislodge any air bubbles.
3. Ideally, the cell should be at least ¼ inch away from any other object, including the sides or
bottom of the solution container.
YSI, Incorporated Model 30/30M 25