YSI 6000UPG - Manual (Page 120)

7-4
7.2 PROBE MAINTENANCE
Once the probes have been properly installed, regular cleaning and oxygen probe membrane
changes are required.
6029 COND/TEMP & 6030 DO/COND/TEMP PROBES
For best results, it is recommended that the KCl
solution and the Teflon membrane at the tip of the
6030 probe be changed prior to each sonde
deployment. See Section 2.2.
After removing the used membrane from the tip of the
6030 probe, examine the electrodes at the tip of the
probe.
If either or both of the silver electrodes are black in color, the probe should be resurfaced using the
sanding disks which are provided in the 6035 reconditioning kit.
Following the instructions supplied with the kit, first dry the
probe tip completely with lens cleaning tissue. Next, hold the
probe in a vertical position, place one of the sanding disks under
your thumb, and stroke the probe face in a parallel direction to
the gold electrode. The motion is similar to that used in striking a
match. Usually 10-15 strokes of the sanding disk is sufficient to
remove black deposits on the silver electrodes, but, in extreme
cases, more sanding may be required to regenerate the original
silver surface.
After the sanding procedure is complete, repeatedly rinse the probe face with clean water and wipe
with lens cleaning tissue to remove any grit left by the sanding disk. After cleaning, thoroughly
rinse the entire tip of the probe with distilled or deionized water and install a new membrane. See
Section 2.2.
Dissolved Oxygen
Sensor
Conductivity
Port