> For the complete documentation index, see [llms.txt](https://docs.aethlabs.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aethlabs.com/microaethalometer-tm-ma450/quick-start-guide/11-status-codes.md).

# Status Codes

| Code Value   | Readable status             | Status Description                                                                                                                                                                                                                                   |
| ------------ | --------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 1            |                             | No status notifications                                                                                                                                                                                                                              |
| 2            | Start up                    | Instrument in sampling and measurement startup                                                                                                                                                                                                       |
| 4            | Tape advance                | Tape advance occurring during sampling and measurement period                                                                                                                                                                                        |
| 8            |                             | N/A                                                                                                                                                                                                                                                  |
| 16           | Optical saturation          | Optical saturation                                                                                                                                                                                                                                   |
| 32           | Sample timing error         | Sample timing error                                                                                                                                                                                                                                  |
| 64           | DualSpot Enabled            | Sampling spot 2 of DualSpot® loading compensation is active                                                                                                                                                                                          |
| 128          | Flow unstable               | Flow unstable during sampling and measurement period. Flow deviates from target flow setpoint by more than ±5%.                                                                                                                                      |
| 256          | Pump drive limit            | Flow out of range during sampling and measurement period                                                                                                                                                                                             |
| 512          | Time source manual          | Time synchronization source is manual (synchronized to application/computer time or no GPS time is available)                                                                                                                                        |
| 1024         | User skipped tape advance   | User skipped tape advance. No tape advance occurred at start of sampling and measurements. **NOT RECOMMENDED! SKIPPING THE AUTOMATIC TAPE ADVANCE AT THE BEGINNING OF SAMPLING WILL IMPACT CORRECT OPERATION OF THE DEVICE. DATA MAY NOT BE VALID.** |
| 2048         | System busy                 | Device stops sampling after receiving a command via USB or serial that requires the device stop operation.                                                                                                                                           |
| 4096         | S.A. disabled               | Source apportionment disabled due to measurement configuration. Check Settings to re-enable source apportionment calculations                                                                                                                        |
| 8192         | Tape jam                    | Tape is jammed. Inspect tape. Release and clamp tape to attempt to clear the jam error.                                                                                                                                                              |
| 16384        | Tape at end                 | Tape is at end. Replace tape.                                                                                                                                                                                                                        |
| 32768        | Tape not ready              | Tape is not ready. Check that the tape is installed and clamped.                                                                                                                                                                                     |
| 65536        | Tape transport not ready    | Tape transport is not ready. Check that tape is installed and clamped and there are no other errors.                                                                                                                                                 |
| 131072       | Ext. power                  | Device is powered through the external 12V DC input (the "12V DC IN" M8 sealed circular connector).                                                                                                                                                  |
| 262144       | Invalid date/time           | Date and time are not set or are invalid. Set the clock with proper date/time.                                                                                                                                                                       |
| 524288       | Tape error                  | Tape Error. A generic error for the tape. Possible reasons are tape is not detected in the instrument.                                                                                                                                               |
| 16777216     | WiFi Forced Timebase to 60s | When WiFi is enabled and timebase is set to less than 60 seconds, the timebase will be forced to 60 seconds as this is the minimum timebase for WiFi functionality.                                                                                  |
| 4294967296   | WiFi Line Full              | WiFi data buffer is full.                                                                                                                                                                                                                            |
| 274877906944 | Remote power down           | Power down command received remotely via serial connection.                                                                                                                                                                                          |