| E-b | Appears when the battery cannot provide enough power for a test. | Replace the battery immediately. |
| E-U | Appears when a used test strip is inserted. | Repeat the test with a new test strip. |
| E-E | Problem in operation. | Repeat the test with a new test strip. If the meter still does not work, please contact customer service for assistance. |
| E-0 | Problem in operation. | Repeat the test with a new test strip. If the meter still does not work, please contact customer service for assistance. |
| E-A | Problem in operation. | Repeat the test with a new test strip. If the meter still does not work, please contact customer service for assistance. |
| E-C | Problem in operation. | Repeat the test with a new test strip. If the meter still does not work, please contact customer service for assistance. |
| E-F | Appears when the test strip is removed while counting down, or other problems in operation. | Repeat the test with a new test strip. |
| E-t | Appears when ambient temperature is below or above the system operation range. | System operation range is 46.4°F ~ 113°F (8°C ~ 45°C). Repeat the test after the meter and test strip are in the above temperature range. |
