11
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
“Auto Calibrate pH Only” Menu
The autocalibration is only available if the sensor type
is pH for the channel to be calibrated. You need only to
select the channel for which you wish to perform
autobuffer calibration on a pH sensor to begin the
process.
You will always start by performing the asymmetric
potential (offset) calibration for the pH sensor followed
by the acid slope calibration and finally the alkaline
slope calibration.
It is recommended to place the channel to be calibrated
on output hold before proceeding with the calibration.
“Auto pH Buffer A.P. Cal”
The current pH and temperature are shown for selected
channel in this screen along with the existing currently
used asymmetric potential offset calibration as well as
the time since this calibration was last performed.
Choices of pH buffer for auto A.P. calibration are 7.00
or 6.86. After selecting buffer click on “Calibrate”
button. If calibration is successful then “Calibration
Complete” is shown. After dampener time expires the
new calibration result will be shown and the time since
calibration will show as 0.00 days. The exact value of
pH buffer at cal temp shown as “Calibrated Value”.