YSI 6 series User Manual page 14

Sondes
your fingers. Once the O-ring is in position, squeeze it every 90 degrees to equalize the tension. See
Figure 11 above. DO NOT USE GREASE OR LUBICANT OF ANY KIND ON THE O-RING.
Using a hobby knife or a scalpel, trim the excess Teflon from the membrane, making your cut about 1/8
inch below the O-ring as shown in Figure 12 below. A razor blade can be used for the cut if no knife or
scalpel is available.
Figure 12
If the installation has been done properly, the finished product should have no bubbles, wrinkles, or tears as
shown in Figure 13 above.
NOTE: Observe the following cautions to assure that your membrane installation is proper:
 Secure the sonde tightly so that it will not move during membrane installation.
 Wash hands before installation and do not allow finger oils or O-ring lubricant to touch the probe face
or the membrane.
 Use caution when replacing the probe guard that you do not touch the membrane. If you suspect that
the membrane has been damaged, replace it immediately.
2.3.2 STEP 2 - INSTALLING THE PROBES
Remove the calibration cup from your sonde by hand as shown in Figure 14, to expose the bulkhead.
Figure 14
BULKHEAD WITH
PROBE PORT PLUGS
YSI Incorporated Environmental Monitoring Systems Operations Manual
TRANSPORT CUP
Figure 13
Section 2
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