14
SLOPE CALIBRATION
It is suggested to perform the slope calibration in air.
• Rinse the probe in clean water to remove any
residual zero oxygen solution.
Note:
If you did not perform the zero calibration procedure, press
CAL
and then the
pq
keys to select the 100% DO calibration
point.
• Dry the probe tip and allow a few seconds for the LCD reading to
stabilize. The “ ” and “
NOT READY
” tags will blink until the
reading is stable.
• When the reading is stable, “
CFM
” tag
starts blinking. Press
CFM
to confirm the
“
100.0%
” DO calibration.
• If the reading is within the limits (±15%
f.s.), the meter stores the value (and
adjusts the slope point).
• The instrument stores the slope calibration
data and returns to measurement mode.
Note:
• If the reading is not close to the
selected calibration point,
“
WRONG
“ tag will blink.
• If the temperature is out of range
“
WRONG
” tag together with the
temperature and “
°C
” tag will
blink.
•
HI9146
has automatic buffer recognition function. If the
pq
keys are pressed to select the desired calibration
value, the automatic buffer recognition function is disabled.
