QED PurgeScan - Model MP20/MP20D/MP20DT - Purge Stabilization Flow Cell - Instruction Manual

Upon receiving the MP20, the storage cup must be filled with pH 4 buffer solution immediately to prevent dehydration of the pH probe. After filling the storage cup with pH 4 buffer solution, store the MP20 in a location where it will not be exposed to temperatures below 32°F. The storage cup is shipped with a minimal amount of pH 4 buffer ...