LaMotte DO 4000 Dissolved Oxygen Meter - Manual (Page 8)

ASSEMBLING THE PROBE
GOOD PRACTICE GUIDELINES
Keep the membrane wet at all times. Between readings the probe can be
stored with the tip in a beaker of deionized water. For longer periods,
the probe should be stored in the protective sheath. The sponge insert
in the tip of the sheath should be dampened with distilled water.
MEMBRANE REPLACEMENT
1. Hold the probe in a vertical position. Carefully unscrew the
membrane module.
2. Holding the new membrane module in a vertical position with the
threaded end up, fill with DO Filling Solution (2787).
3. Keeping the module in a vertical position, carefully screw the
module onto the probe, allowing excess filling solution to escape
through the screw thread. After assembly inspect the membrane.
Make sure no air bubbles are present and the membrane is not
creased.
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