Teledyne Advanced Pollution Instrumentation | Model 633 Aethalometer® Black Carbon Monitor User Manual |
4.2 Instrument Status
The instrument’s current status condition is displayed in decimal format on the front panel HOME screen and in the Status column of the data download. The status condition relates to various subcomponents of the instrument, e.g., Detector, Flow, LED, etc. The decimal number represents a sum of all of the status conditions occurring at any given time. (Multiple status conditions are interpreted using subtraction of the largest possible Status Condition value using the table below.
Table 1. Status Conditions and Descriptions.
| Status |
|
Parameter | Condition | Description |
Detector | 0 | measuring |
| 1 | not measuring (due to either tape advance, fast |
|
| calibration in progress) |
|
|
|
| 2 | calibrating (LED, Flow, Tape Sensors) |
|
|
|
| 3 | stopped |
Flow |
| flow OK |
|
|
|
| 4 | flow low/high by more than 0.25 LPM |
|
|
|
| 8 | Flow check status history |
| 12 | Flow L/H and check status history |
LED |
| LEDs OK |
| 16 | calibrating |
| 32 | calibration error in one or more channels |
|
| (at least one channel OK) |
| 48 | led error (all channels calibration error, COM error) |
|
|
|
Tape |
| tape advance OK |
Advance | 128 | tape warning (less than 10 spots left) |
| 256 | tape last warning (card box visible, less than 5 spots left) |
|
|
|
| 384 | tape error (tape not moving, end of tape) |
|
|
|
Tests |
| No test |
| 1024 | Stability test |
| 2048 | Clean air test |
|
|
|
| 3072 | Change tape |
|
|
|
When Status Condition 3 is encountered, the Aethalometer stops. In all other statuses, it continues to operate with a warning, and the data is flagged accordingly. The status is rep‐ resented by one value, which can point to one parameter or a combination of parameters.
07645A DCN6170 | 39 |