19
KFMANUAL 0317
KAM CONTROLS, INC.
MAINTENANCE continued
The unit can be stored for up to 1 week without use without needing to remove the reagents
or disassemble. Do not disconnect any of the attachments on the Generator Solution Cell and
keep all parts mounted to prevent moisture absorption in the reagents. If the cell is left stand-
ing with the drying tube removed, the ceramic frit on the Cathode Solution Cell will absorb
moisture.
For storage/no usage for over 1 week, the unit needs to be disassembled and all glass needs
to be cleaned with soap and hot water, rinsed, and dried. Leaving the reagents in for an
extended period of time can lead to crystallization.
To keep the Generator Solution Cell performing accurately and effectively be sure that a thin
layer of Special Grease is applied to all glass tapered joints each time the Reagents are
replaced. Frequent greasing will prevent the glassware from seizing and causing damage to
the cell. The Special Grease does not absorb moisture, so it will not hinder the results of the
analysis.
NOTE: No other grease should be used with a KAM
®
KF Karl Fischer Moisture Analyzer due
to the potential for the other types of grease to absorb moisture and interfere with titration if
it is silicon based. KAM CONTROLS is not responsible for problems resulting from the use of
improper grease.
STORAGE
SPECIAL GREASE
CATHODE CELL ELECTRODE CLEANING PROCEDURES
Dirty electrodes (platinum grids) usually result in the following problems:
• A decrease in titration efficiency resulting in a longer measuring time
• An increase in the blank (residual) value of titration current due to absorption of moisture
in the dirty area
• Unstable titration current and lack of reproducible results
• Staining on the ceramic frit at the bottom of the Cathode Solution Cell
NOTE: KAM
®
recommends the use of chromic sulfuric acid (3 ml of potassium dichro-
mate+400 ml of reagent grade sulfuric acid). Because nitric acid produces corrosive fumes, be
sure and conduct all parts of this procedure in an appropriately ventilated environment.
Acid should NOT be reused. Follow appropriate disposal procedures.
KAM
®
performs this service as a part of annual unit recertification and highly recommends end
users send unit to factory for electrode cleaning if a suitable environment and/or chemicals are
not available.
Follow steps for glassware disassembly on page 18 of this manual.