Sondes
Section
2
YSI Incorporated
Drinking Water Monitoring Systems Operations Manual
2-9
The pictures below show a properly installed free chlorine membrane. Note that, because the membrane
will not stretch, there may be some points where the membrane is slightly “bunched up” in the o-ring
groove. This effect is normal and will not affect sensor function. Also note that the presence of bubbles
under the membrane is also normal and should not affect probe function
`
After installing the membrane, either proceed immediately to the sensor activation protocol described
above in the Quick Start Guide or store the probe in a beaker of tap water (NOT deioinized or distilled
water) as shown in the picture below to prevent drying out. Be sure to place the probe GENTLY into the
beaker to avoid damaging the membrane integrity.
Note the presence of a bubble
after installation. This is
acceptable for a free chlorine
membrane.
