LaMotte DO 6 Dissolved Oxygen Meter - Manual (Page 10)

3.4 Dissolved Oxygen Probe Information
The DO 6 hand-held meter is supplied with
a Dissolved Oxygen Probe that works on
galvanic principle, that is, it does not require
any polarising voltage from your meter.
Rather it will generate a millivolt signal
proportional to the amount of oxygen in the
solution.
Your DO Probe has a twin cable, one with a
BNC connector for the DO measurement
input, and the other with a phono jack plug
for the temperature measurement input. Its
sensing area consists of a cathode, anode, and
an inner electrolyte which is separated from
your sample solution by an oxygen permeable
membrane pre-membraned to the probe’s
detachable cap. Reconditioning of your
probe is made easy with the introduction of
this specially designed detachable
pre-membraned cap.
This light weight probe has a built-in
temperature sensor for Automatic
Temperature Compensation (ATC) with
12mm diameter epoxy body housing and 16
mm diameter Noryl detachable cap. Its
compact sensing area reduces air entrapment
which makes it easy to obtain fast, accurate
and stable readings. Simply stir the probe in
the solution being measured. Shaking will aid to remove bubbles if needed
before taking a reading. Also, always ensure to remove water drops from the
membrane when calibrating in air.
Proper use of probe is essential to ensure that the optimum measurement is
taken in a short time. Always immerse the probe beyond the pre-membraned
cap. The minimum water flow rate is 2 inch/second across membrane. The
temperature range for use is within 0 to 50 °C.
Always ensure that the probe’s membrane is protected against any scratches or
dents. The whole pre-membraned cap has to be replaced if the
membranedamaged. It is also important to keep the membrane clean so as to
produce an optimum and accurate measurement.
See Section 8 - "Probe Care and Maintenance" for more information.
9
16 mm
12 mm
Detachable
Pre-membraned Cap
(Probe Sensing Area)
Figure 5: 12 mm Galvanic DO probe