15
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 Temp Offset”
The current pH reading and temperature are shown for
the selected channel in this screen along with the
existing current used temperature offset calibration as
well as the time since this calibration was last
performed.
Enter the temperature value to which you wish to adjust
the reading of the pH sensor. It is always best practice
to calibrate the temperature BEFORE performing any
process calibrations.
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
temperature calibration results will be shown and the
time since calibration will show as 0.00 days. In the
screenshot shown to the right the temperature
calibration is shown being perform on a dissolved
oxygen (D.O.) type sensor. The temperature calibration
screen for the ORP sensor types will look largely similar
to the pH offset screen in the screenshot above.
“Manual Calibrate pH Slope” Menu
Before proceeding to the manual pH slope calibration it
is necessary to have previously performed the pH
Asymmetric Potential (A.P.) offset calibration first.