Manual

YSI Incorporated 6500 Field Guide 5
A live display of pH appears. With the
highlight on Cal, press
Enter
to con-
firm the calibration. A message will
appear confirming the calibration and
displaying the new value (e.g.,
7.00
).
If you choose to abort or redo calibra-
tion for any reason, highlight the appropriate choice above.
Remove the sonde from the pH 7
standard. Rinse with water; shake
excess water from sonde body. Con-
tinue to the next standard (e.g., pH
10), pre-rinsing in used standard if
possible. Proceed through the menu
screens as shown above. Once the second point is calibrated, press
Esc
to return to the
Calibration menu
. Remove the sonde from the
pH 10 standard. Rinse with water, shake excess water from sonde
body and proceed to DO calibration.
DO% Saturation Calibration
Place the sonde into the calibration cup with about 3mm (1/8”) of
water or a wet sponge at the bottom. Wait at least 10 minutes for
probe acclimation before proceeding. From the Calibration display
highlight the DO% reading and press
Enter
to display the choice
for barometric reading.
Choose the units for barometric pressure (e.g., mm Hg) and press
Enter
.
Next enter the current barometric pressure (uncorrected). If actual
pressure is not known, use altitude to
estimate the pressure. See Table 2 in
Appendix F of the manual. Note that
the cal to 738 mm Hg will result in a
97.1 DO% saturation for water-
saturated air. Press
Enter
to proceed or choose
Abort
or
Redo
as
before.
When the reading is stable for 30 seconds, press
Enter
to set cali-
bration. Use
Esc
to return to previous menu screens.