072-0500 Alphasense User Manual
OPC-R1 Optical Particle Counter Issue 1
Alphasense Ltd Page 15 of 33 February 2019
Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. Essex.CM77 7AA. UK
Tel: +44 (0) 1376 556700 - Fax: +44 (0) 1376 335899
Email: sensors@alphasense.com - Web: www.alphasense.com
9 Running the OPC R1 using direct SPI control
Full details of the SPI commands and connections are available for the OPC-R1. This is should be
sufficient for the user to be able to design their own SPI system to control the device and gather
data.
A flow chart outlining simple operation of the OPC R1 is given in 072-0501 Supplemental SPI
information for OPC-R1.
The R1 has a very low power off state unlike the OPC-N2, if the unit is placed into the low power
mode we recommend that the fan and laser are powered up for a minimum of 10 s before taking a
measurement.
10 Revision Control
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