YSI 85 - Manual (Page 19)

YSI, Incorporated Model 85 15
SECTION 6 ADVANCED CONDUCTIVITY SETUP
The default settings of the YSI Model 85 are appropriate for the vast majority of measurement
applications. However, some measurement applications require very specific measurement criteria.
For that reason, we have made the YSI Model 85 flexible to accommodate these “advanced users.”
If, for example, you are using the YSI Model 85 for a process control application that requires that
the conductivity readings be compensated to 20
o
C instead of 25
o
C -- this is the section to read. Or,
if your application for the YSI Model 85 involves the measurement of a very specific saline solution,
the default temperature coefficient may need to be changed to get the very best measurement of that
specific salt.
IMPORTANT: There is never a need to enter Advanced Setup Mode unless your special
measurement application calls for a change in reference temperature and or temperature coefficient.
Therefore, unless you are certain that your application requires a change to one or both of these
criteria, do not modify the default reference temperature (25
o
C) or the default temperature
coefficient (1.91%).
6.1 CHANGING THE TEMPERATURE COEFFICIENT
Follow these steps to modify the temperature coefficient of the Model 85.
1. Turn the instrument on and wait for it to complete its self-test procedure.
2. Use the MODE button to advance the instrument to display conductivity.
3. Press and release both the DOWN ARROW and the MODE buttons at the same time.
The CAL symbol will appear at the bottom left of the display. The large portion of the display will
show 1.91 % (or a value set previously using Advanced Setup).
4. Use the UP ARROW or DOWN ARROW button to change the value to the desired new
temperature coefficient.
5. Press the ENTER button. The word “SAVE” will flash across the display for a second to
indicate that your change has been accepted.
6. Press the MODE button to return to normal operation; the CAL symbol will disappear from the
display.