Xylem 6-Series Multiparameter - Manual (Page 119)

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-113
SONDE PROBE PORTS
Whenever you install, remove or replace a probe, it is extremely important that the entire sonde and all
probes be thoroughly dried prior to the removal of a probe or a probe port plug. This will prevent water
from entering the port. Once you remove a probe or plug, examine the connector inside the sonde probe
port. If any moisture is present, use compressed air to completely dry the connector. If the connector is
corroded, return the sonde to your dealer or directly to YSI Technical Support, see Section 9, Warranty
and Service Information, for details. When you reinstall a probe or port plug, lightly grease the O-ring
with lubricant supplied in the YSI 6570 Maintenance Kit.
CABLE CONNECTOR PORT
The cable connector port at the top of the sonde should be covered at all times. While communicating with
the sonde, a cable should be installed and tightened in place. This will assure that a proper connection is
being made and prevent moisture and contaminants from entering.
When a communications cable is not connected to the cable connector port, the pressure cap supplied with
the instrument should be securely tightened in place.
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 DO membrane changes
are required.
6562 RAPID PULSE DO PROBES
For best results, we recommend that the KCl solution and the Teflon membrane at the tip of the 6562 probe
be changed prior to each sonde deployment and at least once every 30 days during the use of the sonde in
sampling studies. In addition, the KCl solution and membrane should be changed if (a) bubbles are visible
under the membrane; (b) significant deposits of dried electrolyte are visible on the membrane or the O-ring;
and (c) if the probe shows unstable readings or other probe-related symptoms. See Section 2.3 for
instructions on changing the DO membrane.
After removing the used membrane from the tip of the 6562 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.