TETRA Support

Turn on the patient console by holding down the power button for 3 seconds. The red LED will light up to indicate that the device is on.

Turn on the operator tablet by pressing and holding the power button for 3 seconds. The startup logo will appear in the center of the screen to indicate that the device is on.

1. From the Home window of the control tablet, press and hold the power off icon for 3 seconds. The patient console monitor will go dark.
2. Power down. When “No Signal” appears on the patient console, press and hold the power button for 3 seconds. The red power-on LED will switch off to indicate that the instrument is completely shut off.

The examination distance is given on the operator tablet at the start of each individual test. Trigram tests are performed at 40 cm. The diagnostic protocol tests are at 70 cm, except the Contrast Sensitivity [CS] test which must be given at 2 m.

The exam station should be set up paying attention to the following aspects:

1. the chair height and the patient console’s inclination should allow for a comfortable reading position.
2. the eye-screen distance should be as required for the test in use.

The TETRA instrument consists of a pair of electronic devices, the patient console and the operator tablet (also called the command console), and a number of accessories.

The instructions for use, EU Declaration of Conformity, installation guide, and package contents description are on the USB flash drive that comes with the instrument.

The USB flash drive is a special drive that acts as both a memory flash drive and a recovery and software update disk for the TETRA.

You can use the USB flash drive to:

• store PDF reports
• update the Tetra software
• restore the Tetra software

The patient console must be kept connected to the power supply by the supplied power cord during its regular operation. In places without a power supply, the internal battery lets it operate for about 3 hours. It takes about 2–3 hours to fully charge the tablet.

The battery life of the operator console is approximately 4-8 hours (standard-maximum). Battery life is intended for continuous operation of the instrument. It takes about 2–3 hours to fully charge the tablet. 

The product serial number label is on the back of the monitor. Note: The SN should be reported when requesting assistance. The same number is also on the instrument’s packaging box.

Go to the Setup window, go to the 5th icon, “Product Info,” and read the version of the software and hardware currently installed on your device.

The ETH connector, located in the left side of the patient console, is used to print on a network printer or to connect the internet network cable for technical support to remotely access the instrument in case of malfunctions or the need for updates.

The instrument comes with the two devices configured to the BT channel n. 5, already paired and so ready for use. You need only turn on the patient console and the operator tablet and wait for the connection to be established. For more information or to change the BT channel, see the user manual.

Yes, you can receive the report files through Bluetooth on your Android smartphone or your PC (Windows or Linux). The files will be automatically sent to the paired device at the end of the test.

To use this function, pair the TETRA with your device through Bluetooth (BT).

This function is not available for Apple devices (Mac, iPhone, …).

Pairing the TETRA with your Android smartphone or your PC (Windows or Linux) by BT is used to automatically receive the PDF reports as soon as they are generated. Pairing need only be done once and then the files are sent automatically. Once you have received the files via BT on your device you can easily manage them in various ways, such as forwarding, storing, and printing them.

Make BT visible and accessible on your device. Then, from the TETRA setup menu, go into the first icon “Report” and start pairing (option 3/5). Follow the directions that appear at the bottom of the patient screen.

Yes, the instrument can automatically send reports to the printer as soon as they are generated. To use this function, you must have a WiFi-compatible or network printer (see user manual).

With the network cable inserted, access the Setup window, select the 1st icon and start the printer search by pressing the start button from the 4/5 option, “Network Printer.”

To set up a WiFi printer, enter the network access data (1st icon, option 5/5) and then start the printer search as indicated above.

1. Download the update for your instrument model from the Reserved Area. Important: The file name must not be changed.
2. Copy the file you downloaded to the USB flash drive. Use the USB flash drive that comes with the instrument.
3. Access the Setup window of the TETRA to be updated, select the 2nd icon, “Software update,” and press start on the remote control. The automatic update will start, then end after about 10 minutes, and the instrument will restart.

Your access data for the Reserved Area is on the first page of the instrument user manual. These access codes are reserved only for you and are not transferable. Their use by others is strictly forbidden.

The Tetra Patient Console LCD screen is factory calibrated to ensure visual stimuli with quantitatively accurate and repeatable brightness values. Do not vary brightness setting which should stay at the factory setting of “Brightness = 75%”. Press the Brightness button to make sure the value is set to 75%.

For the Operations Console FAQ, see the AOC BT Console. All information is also available in the TETRA user manual.

We accept no gray areas on this point. The answer is: no one will see how you use your TETRA! The instrument does not track the use you make of it; it does not collect data, and no data is transmitted to anyone from the vision chart you have purchased. We do not see you and your work as products to be tracked for business.

Lithium-ion batteries have a predetermined useful life, a maximum number of recharges, and an efficiency curve which, like all batteries, declines with use and the passage of time. Multiple factors can shorten battery life. Some important tips for proper use include: do not leave the tablet with an empty battery; do not leave the tablet off with USB devices inserted; always use the original charger. Follow all the instructions in the user manual to extend the useful life of the batteries.