User manual

DD103 DrDAQ Oxygen Sensor User Guide Pico Technology
1 DO091-2
1 Introduction
The DD103 Oxygen Sensor is used to measure the percentage of oxygen in a gas.
The sensor plugs into the external sensor sockets of DrDAQ using the supplied
cable.
2 Specification
Sensor type Galvanic Cell (lead-oxygen with weak acid electrolyte)
Input
r
ange 0 - 100% oxygen
Accuracy (calibrated) ±3.0% over operating conditions range
Response times
< 15 seconds for 90% response
< 25 seconds for 97% response
Max. humidity 0 - 95% Non-condensing
Operating temperature 5 °C to 40 °C
Storage temperature -15 °C to 50 °C
3 Setting up the oxygen sensor
Since the Oxygen Sensor has an output of 0 mV at 0% oxygen, a single point
calibration can be carried out. The procedures below guide you through setting up
the oxygen sensor to work with PicoLog and calibrating it using the oxygen in the
atmosphere as a reference point (calibration is necessary to use the sensor with
±3% accuracy).
If you have not yet set up DrDAQ with PicoLog, do so now using the DrDAQ
instructions or the DrDAQ help file in the “Start | Programs | Pico Technology”
menu once the software has been installed.
1. Connect the Oxygen Sensor to the socket labelled Ext1 on the DrDAQ
unit.
2. From the File menu, select New settings.
3. Click OK.
4. Check that DrDAQ is selected as the Converter type and that the correct
port is selected (usually LPT1).
5. Click OK.
6. Click Add.
7. Under Channel: select External 1 (The Scaling type will automatically
change to oxygen).
8. Go back to the main monitor view by clicking OK on the two dialog boxes.
DrDAQ should be receiving information from the oxygen sensor. You should now
calibrate the sensor using the procedure on the following page.