Teledyne Analytical Instruments LXT-380, Instructions Manual

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SP3X Sensors LXT-380 Universal Transmitter
Teledyne Analytical Instruments
64
Fluoride Electrodes
a. Moisten the end of the Q-tip with water and dip it in the alumina
polishing powder to pick up a small amount of the powder.
b. Rub the polishing powder onto the fluoride crystal in a circular
motion and moisten the tip if necessary to produce a liquid
consistency more than a paste.
c. Polish the electrode for about 30 seconds and examine the tip for
a shiny surface, repeat if necessary.
d. Rinse the electrode with distilled water and soak the electrode in
a low ppm Calibration solution for a few minutes.
e. Perform a Two Point Calibration.
Other Solid State electrodes, Bromide, Cadmium, Chloride,
Copper, Lead, Sulfide, Silver…
a. Place a few drops of distilled water on the blue polishing strip to
wet the polishing surface.
b. Hold the electrode with the sensing surface facing up.
c. Slide the polishing strip back and forth across the electrode tip,
the sensing tip will be abraded and a new electrode surface will
be generated.
d. Polish the electrode for about 30 seconds and examine the tip for
a shiny surface, repeat if necessary.
e. Rinse the electrode with distilled water and soak the electrode in
a low ppm Calibration solution for a few minutes.
f. Perform a Two Point Calibration.
8.3.7 D
ISSOLVED
O
XYGEN
C
ARTRIDGES
The Teflon membrane of the Dissolved Oxygen sensors is fragile
and should be cleaned using a soft cloth or an artist style paint brush
while rinsing with a stream of water. Dilute dish washing detergents can
be used to remove oily films. Solvents are not recommended as they
could diffuse through the membrane and harm the electrode. Strong
acid/alkaline solutions should not harm the electrode but should only be
used as a last resort before replacing the electrode.