When using the 4ET implants, many researchers monitor the implant battery voltage using Ponemah’s display features to determine when the voltage level is low enough to require replacing the transmitter module.

To obtain accurate battery voltage measurements, the calibration values located on the back of the transmitter packaging are entered in the PhysioTel/ HD Hardware Configuration dialog.

To enter the battery voltage calibration values:

1. Select Hardware | Edit PhysioTel / HD (MX2) Configuration…
   The PhysioTel / HD Hardware Configuration menu will open.
   
   
2. Select the 4ET device from the tree view on the left to display the Implant Details.
   
   
3. Double-click on the Battery Voltage 0 field highlighted above and enter the low voltage value from the 4ET calibration information on the implant package. This is typically 1.6 volts.
   
   
4. Enter the calibration value for the 1.6v reading into the calibration field.
   
   
   
5. Repeat this process for the high voltage calibration by double-clicking on the 1. Enter the high voltage value. This is typically 1.8 volts.
6. Ensure the battery voltage channel is activated; i.e. checked. If it is not checked, click on the checkbox as shown below.
   
7. Repeat this process for each additional implant.
8. After entering the calibration information for all configured implants, click Save and Exit.

This process will provide you with accurate battery voltage information that can be displayed using Ponemah graphs or Digital Displays.