WPI ISO-COP-2, Инструкция по эксплуатации

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2 World Precision Instruments
INTRODUCTION
The ISO-OXY-2 and the OXELP are 2.0mm oxygen sensors with replaceable stainless
steel membrane sleeves filled with an electrolyte solution. Replacement membrane
sleeves (pkg. of four) and filling solution can be purchased in a kit (WPI #
5378
). Filling
solution can also be purchase separately (WPI # 7326 ). A startup kit for this sensor is
available and is recommended for the first purchase of this sensor type (WPI # 5377 ).
With the exception of the connector, the ISO-OXY-2 and the OXELP sensors are
identical. The ISO-OXY-2 is designed for use with WPI free radical analyzers, and
the
OXELP
is designed for use with the ISO2 dissolved oxygen meter. Operation,
maintenance and specifications are identical for these two sensors, so they will be
discussed side-by-side in this manual.
These sensor incorporates WPI’s proprietary combination electrode technology
whereby the oxygen-sensing element and separate reference electrode are encased
within a single shielded sensor design. A gas-permeable polymer membrane is fitted
over the end of the sleeve, which allows oxygen to pass while blocking liquids, ions
and particulate matter.
Oxygen diffuses through the membrane. The voltage applied to the sensor is held at
-0.7V when the monitoring device is on and the sensor is properly connected. The
magnitude of the generated electrical current is determined by the rate of diffusion
through the membrane. The rate is proportional to the partial pressure of oxygen
outside the membrane. The current serves as a measure of the partial pressure of O
2
.
Notes and Warnings
CAUTION : DO NOT EXPOSE SENSOR TO ORGANIC SOLVENTS.
CAUTION : Carefully read the “Probe Unpacking” instructions (found in the
sealed sensor case) before handling the sensor.
NOTE : The sensor must be polarized for at least one hour in 0.1M PBS solution prior
to use.
NOTE : The sensor tip and membrane are extremely delicate. Improper handling will
lead to damage of the sensor.
NOTE : For optimal use of each sensor and sensor membrane sleeve, the sensor must
be stored properly. See “Storing the Sensor” on page 9. Pay special attention to
the sticker on the box. It says, “ THE SENSOR SLEEVE IS FILLED WITH ELECTROLYTE.
IF THE SENSOR IS NOT TO BE USED WITHIN ONE WEEK, REMOVE THE SLEEVE, CLEAN
THE SENSOR WITH DEIONIZED WATER, AND STORE THE SENSOR DRY.” In some cases
the sensor is shipped dry. See “Replacing the Membrane Sleeve” on page 10.