User manual

USB DrDAQ User's Guide 25
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15. Click OK to close the Parameter Scaling dialog - the Parameter Scaling
dialog closes
16. Click OK to close the Parameter Options dialog - the Parameter Options
dialog closes
17. Click OK to close the Edit DrDAQ Measurements dialog - the Edit DrDAQ
Measurements dialog closes
18. Click OK to close the DrDAQ Measurements dialog - the DrDAQ
Measurements dialog closes
This completes the entry of the calibration data.
Note: You can remove the calibration data by opening the Parameter Scaling dialog
and setting the drop-down list to 'none'. If you want to completely delete the
calibration scaling you can either edit and delete the entries in the Parameter Scaling
dialog or use the New Settings command from the main menu. If you use the New
Settings command all scaling data will be lost.
Check the calibration
To be sure that the calibration has been successful, you must repeat the measurement
stage of the procedure. When the check measurements have been completed there
should be very close agreement between the measured and standard values (that is,
within 5% of the value). If this is not the case, check that you have entered the
calibration data correctly and repeat the process.
Once you have successfully calibrated your DD101, write the date on the label and
stick the label on the sensor (do not block the holes in the sensor with the label).
Testing Sensors
You can check whether a sensor is working properly or not by running through the
calibration procedure. If you find that the sensor values differ from the standard
values by more than 10% you may have a damaged sensor. In this case contact Pico
for assistance.
3.6.6
DD103 Oxygen Sensor
The DD103 Oxygen Sensor is used to measure the percentage of oxygen in a gas.
The sensor plugs into the external sensor sockets of USB DrDAQ using the supplied
cable.
Specification
Sensor Type
Galvanic Cell (lead-oxygen with weak acid electrolyte)
Input Range
0 to 100% oxygen
Accuracy (Calibrated)
±3.0% over operating conditions range
Response Times
< 15 seconds for 90% response