Xylem 6-Series Multiparameter Manual de usuario descargar pdf (Pagina 122)

Sondes Section 2

YSI Incorporated Environmental Monitoring Systems Operations Manual 2-116

Membrane Installation Instructions

Use the schematic below as an aid in replacement of the YSI Optical DO membrane.

Note: The following steps can be carried out with the probe either installed in the sonde or removed from it.

Avoid touching the sensing membrane (shown in the above drawing) during the procedure.

 Remove the wiper assembly from the 6150 Optical DO Sensor and set it aside for later use.

 Using the 1/16

inch hex driver supplied in the 6155 Kit, remove the three screws from the sensor

face as shown in the diagram above. Remove the old membrane assembly from the wiper shaft

and set the screws aside for later use.

 Remove the new sensor membrane assembly from its hydrated container and dry the backside (the

side with the cavity) completely. Be certain that there is no water remaining in the cavity which

holds the sensing membrane. Use lens cleaning tissue, a gentle stream of compressed air, or both

to assure that the membrane cavity is dry. Do not heat the membrane assembly.

 Make certain that there is an O-ring in place in the groove surrounding the sensor cavity.

 Place the sensor membrane assembly over the wiper shaft and align the holes in the membrane

holder with those on the probe face so that the sensor cavity is located over the optical fiber ends

on the probe face. Be absolutely certain that the sensor cavity lines up with the probe optics

before proceeding.

 Place one of the screws in a hole in the membrane assembly and rotate the assembly slightly as

needed to match the screw to the proper hole in the probe face. Partially tighten the screw using

the 1/16 inch hex driver.

 Insert screws in the other two holes of the membrane assembly, rotating slightly as needed to

match the screw to the hole in the probe face. Partially tighten the screws using the 1/16 inch hex

driver. Take care not to scratch the membrane surface.

 Tighten all three screws securely using the 1/16 inch hex driver. CAUTION: INSERT LONG

SHAFT OF THE HEX DRIVER INTO THE SCREW AND TURN WITH THE SHORT SHAFT

AS SHOWN IN THE DIAGRAM TO AVOID OVERTIGHTENING THE SCREWS.

 Replace the wiper on the probe shaft and tighten with the proper 0.05 inch hex driver.

Wiper Assembly

Membrane Assembly

Sensing Membrane

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Xylem 6-Series Multiparameter Manual de usuario Pagina 122