User manual

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3.7.4
Examples of digital out use
PicoScope
The following is a short example of how to activate an LED via a digital output on the
USB DrDAQ using the Mask and Alarm functions of PicoScope. With USB DrDAQ
connected and PicoScope open:
Connect the LED to the GND connection on the USB DrDAQ and digital connection 2
(refer to Connections).
Note: Any digital connection can be used but we are using 2 in this example).
Within PicoScope, activate the Temp channel only (refer to displaying channels).
Under the Tools menu, choose Masks>Add Masks .
Choose Mask of Temp within the Available Masks area, or click Generate if it doesn't
show in the Library list.
Click Apply and choose OK .
Right click the oscilloscope window and choose Masks>Edit Mask .
Within the mask dialogue, adjust the two low values to 28°C.
Right click the oscilloscope window and choose Masks>Exit Mask Edit .
Under Tools menu, choose Alarms .
Under Event , choose Mask(s) Fail (ensure it is enabled).
Choose Add .
Under Action menu, choose Digital Output .
Set Chann to Digital Output 2 , and High .
Choose OK .
Click Apply and choose OK.
Start the trace and place the tip of a finger onto the Temp sensor on the USB
DrDAQ. The trace should rise, and upon overlapping the mask, the LED connected
to digital connection 2 should illuminate.
PicoLog
The following is a short example of how to activate an LED via a digital output on the
USB DrDAQ using the Alarm function of PicoLog. With USB DrDAQ connected and
PicoLog open:
Connect the LED to the GND connection on the USB DrDAQ and digital connection 2
(refer to Connections).
Note: Any digital connection can be used but we are using 2 in this example).
Choose File>New settings.
Click OK.
Click OK.
Choose Converter type: DrDAQ (USB).
Click OK.
Click Add.
Next to Channel, choose Temperature.
Choose Options.
Choose Alarm.
Select Enable Alarm.
Enter the Upper threshold 28°C.
Select Digital Output 2 .
Click the next four OK buttons .
Place a finger tip on the Temp sensor, an alarm will trigger once the temperature
goes above the upper threshold entered earlier, when this happens the LED will
illuminate, along with the red alarm icon in PicoLog. When you remove your finger,
the LED will extinguish (once the temperature drops back below the upper
threshold value).