This case-sensitive code system http://hl7.org/fhir/metric-operational-status defines the following codes:
| Code | Display | Definition |
| on | On | The DeviceMetric is operating and will generate DeviceObservations. |
| off | Off | The DeviceMetric is not operating. |
| standby | Standby | The DeviceMetric is operating, but will not generate any DeviceObservations. |
| entered-in-error | Entered In Error | The DeviceMetric was entered in error. |