YSI 600DW-B Sonde - Manual (Page 103)

Sondes Section 2
To remove the o-rings:
Use a small, flat-bladed screwdriver or similar blunt-tipped tool to remove the o-ring from its groove.
Check the o-ring and the groove for any excess grease or contamination. If contamination is evident, clean
the o-ring and nearby plastic parts with lens cleaning tissue or equivalent lint-free cloth. Alcohol can be
used to clean the plastic parts, but use only water and mild detergent on the o-ring itself. Also, inspect the
o-rings for nicks and imperfections.
CAUTION:
¾ Using alcohol on o-rings may cause a loss of elasticity and may promote cracking.
¾ Do not use a sharp object to remove the o-rings. Damage to the o-ring or the groove itself may result.
Before re-installing the o-rings, make sure that you are using a clean workspace, clean hands and are
avoiding contact with anything that may leave fibers on the o-ring or grooves. Even a very small bit of
contamination (hair, grit, etc.) may cause a leak.
To re-install the o-rings:
¾ Place a small amount of Teflon stopcock grease between your thumb and index finger. (More grease is
NOT BETTER!)
¾ Draw the o-ring through the grease while pressing the fingers together. Use this action to place a
VERY LIGHT covering of grease to all sides of the o-ring. Place the o-ring into its groove making
sure that it does not twist or roll.
¾ Use the previously grease-coated finger to once again lightly go over the mating surface of the o-ring.
DO NOT use excess grease on the o-ring or the o-ring groove.
CAUTION: Do not over-grease the o-rings. The excess grease may collect grit particles that can
compromise the seal. Excess grease can also cause the waterproofing capabilities of the o-ring to diminish,
potentially causing leaks into the compartment. If excess grease is present, remove it using lens cloth or
lint-free cloth.
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 Customer Service, see
Section 8, 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.
YSI Incorporated Drinking Water Monitoring Systems Operations Manual 2-96