YSI APPENDIX F - Manual (Page 9)

Quick Start Guide to Drinking Water Studies Appendix F
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Note the presence of a bubble
after installation. This is
acceptable for a free chlorine
membrane.
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.
YSI Incorporated Drinking Water Monitoring Systems Operations Manual F-9