YSI 85 - Manual (Page 20)

Advanced Conductivity Setup Section 6
YSI, Incorporated Model 85 16
6.2 CHANGING THE REFERENCE TEMPERATURE
Follow these steps to modify the reference temperature 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. Press and release the MODE button; the large portion of the display will show
25.0C
(or a
value set previously using Advanced Setup).
5. Use the UP ARROW or DOWN ARROW button to change the value to the desired new
reference temperature (any value between 15
o
C and 25
o
C is acceptable).
6. Press the ENTER button. The word “SAVE” will flash across the display for a second to
indicate that your change has been accepted.
7. The instrument will automatically return to normal operation mode.
6.3 CHANGING FROM AUTORANGING TO MANUAL RANGING
If your application is easier to perform using a manual range that you select, the YSI Model 85
allows you to turn off the default autoranging feature. While you are making conductivity or
temperature compensated conductivity measurements, simply press and release the UP ARROW
button. Each additional press of the UP ARROW button will cycle the Model 85 to a different
manual range until you return again to autoranging. Five pushes of the UP ARROW button will
cycle the Model 85 through the four manual ranges and return the instrument to autoranging.
NOTE: You may see an error message in some manual ranges if the manual range selected is not
adequate for the sample you are measuring. If this happens, simply press and release the UP
ARROW button again until a range is selected which is suitable for your sample. If you get lost and
don’t know if you’re in a manual range or autoranging, simply turn the instrument off and back on.
Also note that the conductivity units will flash while you are in manual range. The instrument will
always default to autoranging when first turned on.
The four ranges of the YSI Model 85 are:
Range 1 Range 2 Range 3 Range 4
0 to 499.9
µS/cm
0 to 4999
µS/cm
0 to 49.99 mS/cm 0 to 200.0 mS/cm