AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | OI/AWT420-EN REV. B
59
pH/Redox/ORP
This section describes how to calibrate the sensor and involves measuring the
sensor’s sensitivity to pH and temperature by exposing the sensor to samples of
known pH/Temperature values
Notes.
• Access to the Calibrate menu is via Calibrate and Advanced levels only.
•
if Hold Outputs
Menu Comment Default
Sensor Cal See pH/Redox/ORP calibration,
There are four possible calibration modes:
•
•
•
•
Note. Automatic calibrations are not available for Redox/ORP measurements
Temperature Cal See Temperature calibration procedure, .
Edit Cal
pH Slope Note: pH sensors only.
Edit the slope value:
•
pH Offset Note: pH sensors only.
Edit the offset value:
•
mV Slope Note: Redox/ORP sensors only.
Edit the slope value:
•
mV Offset Note: Redox/ORP sensors only.
Edit the offset value:
•
Temp. Slope Edit the temperature slope value:
•
Temp. Offset Edit the temperature offset value:
•
Sample Collection Note: pH sensors only.
See In process calibrations, .
Collection Complete Note: pH sensors only
See In process calibrations, .
Restore Cal Defaults Resets slope and offset values to default values.
Calibrate
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