9
halfway to the liquid. If possible do not allow the probes to touch
any solid object in the solution. There should be no air bubbles
around the probes either. Shaking or moving the probes vigorously
before recording any measurement will dislodge any bubbles
formed in the probes.
PROBE HANDLING AND MAINTENANCE
REMINDER:
If the user uses a two-wire conductivity probe, the
user needs to short terminal D1 with terminal S1 and terminal D2
with terminal S2.
Handling the probe
To ensure accurate and repeatable results:
1. The probe (cell) must be clean before making any measurements.
If measuring low conductivity solutions, extra ordinary
cleanliness may be necessary.
2. The probe cell plates must totally submerged in the solution.
The electrode chamber must be free of trapped air or particulates.
You may need to tap the probe gently to dislodge any air bubbles.
3. Ideally, the probe should be at least 1/4 inch away from any
object, including the sides and bottom of the container.
4. Stirring may be necessary for high accuracy readings.
5. If possible, isolate the solution container from ground potentials.
6. Electrical fields and stray currents caused by stirrer motors,
heaters, etc., can interfere with the measurements. The user
should determine the effects of these and make the necessary
corrections either by shielding or by disconnecting those units
that cause trouble.
7.Always rinse the cell carefully before using it in another solution.
8. Never store a dirty or contaminated probe.
