YSI 85 - Manual (Page 11)

YSI, Incorporated Model 85 7
SECTION 3 PREPARING THE PROBE
The YSI Model 85 dissolved oxygen probe is shipped dry. The protective membrane cap on
the probe tip must be removed and replaced with KCl solution and a new membrane cap
before using the probe. Follow the instructions below to install KCl solution and the new
membrane cap.
3.1 MEMBRANE CAP INSTALLATION
To install a new membrane on your YSI Model 85 dissolved oxygen probe:
1. Unscrew and remove the probe sensor guard.
2. Unscrew and remove the old membrane cap.
3. Thoroughly rinse the sensor tip with distilled water.
4. Prepare the electrolyte according to the directions on the KCl solution bottle.
5. Hold the membrane cap and fill it at least 1/2 full with the electrolyte solution.
6. Screw the membrane cap onto the probe moderately tight. A small amount of
electrolyte should overflow.
7. Screw the probe sensor guard on moderately tight.
Screw Cap on
moderately tight
Unscrew Guard
Unscrew Cap
Fill Membrane
with KCL Solution
Screw Guard on
moderately tight