Skip to content
Cirrus Research Support
Technical Support for Cirrus Products and Services
Product Manuals & Datasheets
Back to Cirrus
Firmware Update for Optimus/Optimus+ Sound Level Meters
OLED Screen Degradation Information
Powering the Optimus/Optimus+
Changing the Time History Sampling Rate on your Optimus/Optimus+
How to make a measurement with an Optimus/Optimus+ Red
Understanding Optimus/Optimus+ Product Codes
Optimus/Optimus+ Screensaver and Display Power Saving Modes
Troubleshooting USB Connectivity for Optimus/Optimus+
I'm seeing the "preamplifier not fitted" message. What does this mean and how do I fix it?
Find out more.