INW - TempHion Instruction Manual
5
Battery Life Note
The TempHion sensors are shipped from the factory with fresh internal AA batteries.
Battery life will depend on battery brand, battery age, temperature of the environment,
usage schedule, and other factors.
General Precautions
The rest of this manual includes step-by-step instructions for setting up the
TempHion
TM
, calibrating it, and using it in the fi eld. When reading and following
the instructions in these sections, keep these very important considerations in mind:
•
Do not handle the surfaces of the sensing electrodes. Oils from fi ngers can
“blind” the reactive surface. Rough handling can scratch the reactive surface.
•
Avoid long-term exposure of silver-based sensing electrodes to bright sunlight.
•
Use calibration standards that are accurately prepared. Discard standards after
use. Do not return the used standards to the bottles of “fresh” solution.
•
When TempHion’s reference electrode contains fi lling solution, the o-ring at the
top of the reference assembly must be in the upper position. (See further details
under Field Deployment later in this manual.)
•
For any step-change in temperature (e.g., where calibration standards are at a
different temperature than water to be tested) allow the instrument to come to
complete thermal equilibrium before making measurements. Up to 30 minutes
may be required.
Installation and Operation
