Thermo Scientific AquaSensors™ DataStick™ Measurement System User Guide
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4.1.1
pH Interface Overview
When a pH sensor head is installed in the DataStick, AquaComm™ will automatically display pH, temperature, sensor type and
DataStick serial number. Pull-down menus will also automatically provide calibration, configuration and diagnostic choices for pH.
Factory default configurations for a pH sensor head are:
•
Units of measure:
pH
(options include mV)
•
Units for temperature:
°C
(options include °F)
•
Sensor Filter:
1 Second
(options include 0 to 100 seconds in 1 second increments)
•
Temperature Filter:
1 Second
(options include 0 to 100 seconds in 1 second increments)
•
Buffer Standards:
4 pH, 7pH, and 10pH
(options include DIN 19267: 1.09pH, 4.65pH, 6.79pH, 9.23pH and 12.75pH)
When configuration information is changed in a DataStick, the information remains with the DataStick. If a new sensor head is
installed, the configuration will remain as programmed by the user. It will not revert to default values. When calibrating the pH
measurement, be sure that the current configuration settings are well understood.
Calibration options for the differential pH sensor are:
•
2-point Buffer Calibration: Sensor placed in two buffer standards and automatically adjusts offset and span.
•
1-point Buffer Calibration: Sensor placed in one buffer standard and automatically adjusts measurement offset.
•
2-point Sample Calibration: Desired reading entered for two samples at least 3 pH units apart; adjusts offset and span.
•
1-point Sample Calibration: Desired reading is entered for one sample to adjust measurement offset.
Calibration options for temperature are:
•
1-point Sample Calibration: Desired reading is entered for one sample to adjust measurement offset.
4.1.2
pH Configuration
The AquaComm™ CONFIGURE functions can be accessed from a pull-down menu that automatically changes based on the
sensor type connected to the DataStick. When a pH sensor is connected, settings for data filters, units of measure and buffer
standards can be viewed or changed.
