YSI 600DW-B Sonde - Manual (Page 104)

Sondes Section 2
If moisture has entered the connector, dry the connector completely using compressed air, a clean cloth, or
paper towel. Apply a very thin coat of lubricant from the 6570 Maintenance Kit to the O-ring inside the
connector cap before each installation.
2.10.2
PROBE CARE AND MAINTENANCE
Once the probes have been properly installed, remember that periodic cleaning and free chlorine membrane
changes are required.
6572 FREE CHLORINE PROBES
For best results, we recommend that the KCl solution and the membrane at the tip of the 6572 probe be
changed prior to each sonde deployment and, or more frequently if the sensor appears to be drifting as
determined by quality assurance tests with a DPD colorimeter. See Section 2.3 for instructions on
changing the free chlorine sensor membrane.
After removing the used membrane from the tip of the 6572 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
fine sanding disks which are provided in the 6035 reconditioning kit.
To resurface the probe using the fine sanding disk, follow the
instructions below.
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 direction parallel to the
platinum electrode (located between the two silver electrodes). The
motion is similar to that used in striking a match. Usually 10-15 strokes
of the sanding disk are sufficient to remove black deposits on the silver
electrodes. However, in extreme cases, more sanding may be required
to regenerate the original silver surface.
After completing the sanding procedure, 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.
IMPORTANT: Be sure to: (1) Use only the fine sanding disks provided in the 6035 maintenance kit in the
resurfacing operation and (2) Sand in a direction parallel to the platinum electrode. Not adhering to either
of these instructions can seriously damage the electrodes.
NOTE: If this procedure is unsuccessful, as indicated by improper probe performance, it may be necessary
to return the probe to an authorized service center. See
Section 8, Warranty and Service Information,
for contact information.
6560 CONDUCTIVITY/TEMPERATURE PROBES
The openings that allow fluid access to the conductivity electrodes must be cleaned regularly. The small
cleaning brush included in the 6570 Maintenance Kit is ideal for this purpose. Dip the brush in clean water
and insert it into each hole 15-20 times. In the event that deposits have formed on the electrodes, it may be
necessary to use a mild detergent with the brush. After cleaning, check the response and accuracy of the
conductivity cell with a calibration standard.
YSI Incorporated Drinking Water Monitoring Systems Operations Manual 2-97