Thermo Scientific Scientific AquaSensors DataStick User Manual page 29

4 . 1 . 2 . 1 C O N F I G U R A T I O N O F B U F F E R S T A N D A R D S
Select BUFFER STANDARD from the Configuration pull-down menu to view or change the buffer standard that will be used
as a reference for buffer calibrations.
There are two pre-defined standards currently used with the DataStick system. The Thermo Scientific AquaSensors buffer
standard is the default when the system is reset.
Thermo Scientific AquaSensors Buffer Standards: 4 pH, 7 pH and 10 pH. (DEFAULT).
DIN 19267 Buffer Standards: 1.09 pH, 4.65 pH, 6.79 pH, 9.23 pH and 12.75 pH.
When using a buffer standard that is not included in the pre-defined buffer standard, use the
'2-point sample' calibration method.
ASCII Command to View Buffer Settings
Function
Get Standards
ASCII Commands to Set Buffer Settings
Function
Set Standard to 4/7/10s
Set Standard to DIN
All Set Commands will respond with "OK" if accepted and "ERROR" if not accepted
4 . 1 . 2 . 2 S E N S O R F I L T E R
Select SENSOR FILTER from the Configuration pull-down menu to view or change the sensor filter constant.
The filter setting can be changed by selecting the edit box and typing in the desired constant. To accept the change, click OK.
To abort the change, click CANCEL.
If the sensor filter is set to 5 seconds, it will take 5 seconds to reach 90% of the final value when the reading changes.
Measurements are averaged to reduce periodic variations.
The default filter setting is 1 second and the maximum filter is 100 seconds. Use zero seconds for a completely unfiltered reading.
Thermo Scientific AquaSensors™ DataStick™ Measurement System User Guide
Command Response
GPHBUF 0
1
Command Explanation
SPHBUF 0 Sets buffer calibration based on 4, 7 and 10 pH standards
SPHBUF 1 Sets buffer calibration based on DIN Standards
Explanation
4/7/10 pH Standards
DIN pH Standards
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