In-Situ TROLL 9500 Operators Manual - Manual (Page 103)

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TROLL 9500 Operator’s Manual 0095110 rev. 007 01/09
SECTION 13: DISSOLVED OXYGEN—OPTICAL
MAINTENANCE AND STORAGE
Cleaning the Sensor Cap
1. Leave the cap on the sensor!
2. Rinse the sensor with clean water from a squirt bottle or spray
bottle.
3. Gently wipe with a soft cloth or brush if biofouling is present.
4. If extensive fouling or mineral build-up is present, soak the cap
end in vinegar for 15 minutes, then soak in deionized water for 15
minutes.
Do not use organic solvents—they will damage the foil. Do
not remove the cap from the sensor prior to brushing.
After cleaning the sensor, perform a 2-point user calibration.
Cleaning the Optical Window (Perform only if changing the cap)
Remove the cap and gently wipe the window with the supplied lens
wipe.
Caution: Do not wet the lens area with water or any solution.
Cleaning the Sensor Body
With the sensor cap installed on sensor, gently scrub sensor body with
a soft brush. Soak in vinegar and DI water to remove mineral deposits
or extensive fouling as in step 4, above.
Storage
Prior to installation: Store in factory supplied container.
Installed: The RDO sensor can be stored wet or dry. When installed
with other sensors, it may be useful to store all sensors in a moist en-
vironment. In-Situ supplies recyclable plastic calibration and storage
sleeves, as well as calibration and storage vessels for this purpose.
Replacing the Sensor Cap
The sensor cap has a 1-year life after the TROLL 9500 instrument
takes its first RDO sensor reading. Replacement caps are available
from In-Situ Inc. or your authorized In-Situ distributor.
1. Pull the used sensor cap off of the sensor, without twisting.
2. Remove the existing o-rings from the sensor.
3. Use a lint-free cloth to remove any moisture from the sensor body.
Note: Ensure that there is no moisture in the o-ring grooves.
Avoid touching or cleaning the lens with anything other than
the supplied lens wipe.
RDO Sensor Summary
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the RDO adapter cable back against the TROLL 9500 body so
it will not interfere with the wiper’s rotation.
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plastic cal insert (it has an orange base) with calibration solu-
tion, slide it up around the sensors, including the RDO cable,
and use the RDO restrictor as a support during calibration.
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TROLL 9500. Remember that a combination pH/ORP sensor
will operate properly only in port 1, and a turbidity wiper acces-
sory only in port 3.
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be stored in the calibration and storage sleeve for short periods
of time. For long-term storage, remove the RDO sensor—it is
not necessary to remove it from the adapter—with restrictor
and nose cone. Attach the standard TROLL 9500 Cal Cup with
a moist sponge in the bottom.
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MONITORING
4. Use your finger to apply a layer of lubricant around the o-ring
grooves. Place the o-rings on the sensor. Apply another thin layer
of lubricant to the o-rings and grooves.
Note: Do not transfer grease to the lens or sensor pins.
5. Clean the lens on the sensor with the wipe provided in the kit and
allow to dry thoroughly. Inspect for scratches or dirt.
6. Remove the new cap from its sealed packaging and attach it to
the sensor, being careful to press firmly, without twisting, until
it seals over the probe body. Make sure that the o-rings are not
pinched or rolled between the cap and sensor.
7. Perform a 2-point calibration. No conditioning is required prior to
use.