17
A
dvanced
S
ensor
T
echnologies,
I
nc. U.S.A.
Website:
www.astisensor.com
IOTRON
TM
Trademark of ASTI
IOTRON
TM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
“Manual Calibrate pH Slope” Menu - BASE
The current pH reading and temperature are shown for
the selected channel in this screen along with the
existing current used asymmetric potential offset
calibration as well as the time since this calibration was
last performed.
Enter the value to which you wish to adjust the reading
of the pH sensor to perform the acid slope calibration.
In the case that a pH buffer is used the exact value at the
current temperature should be entered (see appenix “A”
and “B” for further details).
After pressing the “Calibrate” button the screen will
display “Calibrating”. If the calibration is successful it
will show “Calibrationg Complete”. The calibration
might not be successful if the calibration limits are
exceeded or else is a communication error occurs.
Finally after the dampener time is expired the new
calibration results will be shown and the time since
calibration will show as 0.00 days. The basic sequence of
events after pressing the calibrate button also occurs for
the autobuffer calibrations screens as well as the manual
calibration screens.
It is best practice to view the result of your calibrations
to ensure that everything is shown as expected. An
example is shown to the right for bringing up the sensor
calibration display screen for the channel which was just
calibrated in the screenshots showing the various
manual offset and slope modes.