YSI ProODO - Manual (Page 20)

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M A I N T E N A N C E A N D S T O R A G E
This section describes the proper procedures for care, maintenance and storage
of the ProODO. The goal is to maximize their lifetime and minimize down-time
associated with improper sensor usage.
updatInG InstruMent and proBe fIrMWare
The instrument and probe’s firmware can be updated via www.ysi.com. There
you will find the new firmware files and instructions on how to update the
instrument and/or probe. There is no need to send the instrument back to the
factory for upgrades.
General MaIntenance - Battery
coMpartMent GasKet
The instrument utilizes a gasket as a seal to prevent water from entering the
battery compartment. If the gasket and sealing surfaces are not maintained
properly, it is possible that water can enter the battery compartment. This
could severely damage the battery terminals causing loss of battery power and
corrosion to the battery terminals. Therefore, when the battery compartment
lid is removed, the gasket that provides the seal should be carefully inspected for
contamination (e.g. debris, grit, etc.) and cleaned if necessary. If contamination
is evident, clean the gasket 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 gasket for
nicks and imperfections.
Using alcohol on a gasket may cause a loss of
elasticity and may promote cracking.
sensor MaIntenance - dIssolVed oxyGen
CLEANING THE SENSOR CAP
The Sensor Cap should be kept clean since some types of fouling may consume
oxygen which could affect the dissolved oxygen measurements. To clean the
Sensor Cap, gently wipe away any fouling with a lens cleaning tissue that has
been moistened with water. Do not use organic solvents to clean the Sensor Cap.
Using an organic solvent to clean the Sensor Cap may cause permanent damage
to the cap. For example, alcohol will dissolve the outer paint layer and other
organic solvents will likely dissolve the dye in the cap
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SENSOR CAP REPLACEMENT
The Sensor Cap should be replaced about once per year but may last longer.
It should also be replaced if it is cracked or damaged (see Troubleshooting
section for instruction on how to inspect the cap for damage). The instruction
sheet shipped with the replacement ODO sensor cap includes the calibration
coefficients specific to your sensor cap.
IMPORTANT - Be sure to save the ODO Sensor Cap instruction
sheet in case you need to reload the calibration coefficients.
The replacement ODO Sensor Cap is shipped in a humidified container and the
package should not be opened until immediately before sensor cap replacement.
Once the sensor cap has been installed on the ODO sensor as described below,
it is important to keep the sensor in a 100% humid environment. Therefore,
the ODO sensor should be stored either in the grey calibration/storage sleeve
with the sponge moistened or immersed in water, see Sensor Storage for more
information. If the sensor dries out, refer to the Rehydration procedure in this
manual.
Refer to Figure 8 below when following the instructions for replacing the cap.
Figure 8
Caution: Avoid touching the sensing end of the sensor
cap during the following maintenance procedures.
Remove the old sensor cap assembly from the sensor by grasping the probe 1.
body with one hand and then rotating the sensor cap counterclockwise until
it is completely free. Do not use any tools for this procedure.
u