YSI ProOBOD - Manual (Page 5)

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G E T T I N G S T A R T E D
Throughout the manual, the term “probe” refers to the end of the cable where
the sensor, stir motor, and stirrer are located. The term “sensor” refers to the
Optical Dissolved Oxygen sensing portion of the probe assembly and the term
“sensor cap” refers to the removable sensing cap that is replaced about once per
year (Figure 1).
Figure 1.
Unpacking the OBOD prOBe
Each ProOBOD probe and replacement OBOD sensor cap
includes an instruction sheet with important information
unique and specific to each individual sensing cap.
Carefully unpack the instrument and accessories and inspect for damage.
Compare received parts with items on the packing list. If any parts or materials
are damaged or missing, contact YSI Customer Service at 800-897-4151 (+1 937
767-7241) or the authorized YSI distributor from whom the instrument was
purchased.
OBOD Sensor Cap,
shown here removed
from probe
Probe
Stir paddle
Optical DO sensor
Stirrer toggle switch,
turns stir paddle
on and off
Temperature sensor
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Remove the ProOBOD cable/probe assembly from the shipping container and
locate the instruction sheet that is included. This instruction sheet is important
because it contains the calibration coefficients for your sensor cap. After using
this sheet for general probe setup, be sure to store it in a safe place in case you
need to reload these calibration coefficients in the unlikely event that they are
ever deleted from the instrument and probe.
Note - A new cable/probe assembly already has a
sensor cap installed and the sensor cap coefficients
are preloaded into the probe at the factory.
Preparing the probe for the first time:
A new ProOBOD probe will have a clear protective cover placed over the 1.
sensor cap to ensure the cap remains moist during shipment. Carefully
remove this clear cover from the end of the probe by pulling it straight off
the sensor. Save the clear cover along with the sponge in case you want to
use it later for long term storage of the probe.
Place the probe in a standard BOD bottle that contains a small amount of 2.
clean water (approximately 40 ml). The sensor should not be immersed in
water but rather in the air above the water. The purpose is to create a 100%
water-saturated air environment for the sensor which is ideal for calibration
and storage when not in use.
It is important to always keep your sensor in a moist
environment so the sensor cap does not dry out. (See
Maintenance and Storage for more information.)
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