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Senseair aSENSE M III Manual

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Self-diagnostics
The system contains complete self-diagnostic procedures. A full system test is executed automatically
every time the power is turned on. For aSENSE mIII the internal voltage regulators and outputs are
checked. In addition, constantly during operation, checking the valid dynamic measurement ranges
checks the sensor probes against failure. These different system checks return error bytes to the
system RAM. If any error is detected, the yellow LED will be lit until the error has vanished and the
error flag is reset. “Warm up” and “Out of Range” are the only bits that are reset automatically after
return to normal state. All other error bits have to be reset manually after return to normal state –
either by pushing MENU & ESC buttons simultaneously for (=Entr(+-) or by power off and restart.
By pushing the push button ”MENU” the error code number Exxx is shown on the LCD. Descriptions of
the different codes are listed below.
Error code and action plan
Bit #
Error
code
Error description
Suggested action
0
N/A
Fatal Error
Yellow LED continuously flashes.
Push buttons are not operating.
Try to restart sensor by power OFF/ON.
Contact local distributor
1
2
Reserved
2
4
Algorithm Error.
Indicate wrong EEPROM
configuration.
Try to restart sensor by power OFF/ON.
Check detailed settings and configuration
with UIP software version 4.3 and higher.
Contact local distributor
3
8
Output Error
Detected errors during output signals
calculation and generation.
Check connections and loads of outputs.
Check detailed status of outputs with UIP
software version 4.3 and higher.
4
16
Self-Diagnostic Error.
May indicate the need of zero
calibration or sensor replacement.
Check detailed self-diagnostic status with
UIP software version 4.3 and higher.
Contact local distributor
5
32
Out of Range Error
Accompanies most of other errors.
Can also indicate overload or failures
of sensors and inputs.
Resets automatically after source of
error disappearance.
Try sensor in fresh air.
Check connections of temperature and
relative humidity probe.
Check detailed status of measurements
with UIP software version 4.3 and higher.
See Note 1!
6
64
Memory Error
Non-fatal error during memory
operations.
Check detailed settings and configuration
with UIP software version 4.3 and higher.
7
128
Warm Up state
Is always set after power up or power
failure. Resets after restart sequence
If it doesn’t disappear in half a minute,
check power stability.
Table V. Error codes
Note 1. Any probe is out of range. Occurs, for instance, during over exposure of CO
2
sensor, in which
case the error code will automatically reset when the measurement values return to normal. Could
also indicate the need of zero point calibration. A background calibration using push button function
”bCAL” will cure this error (a more exact zero calibration using ”CAL” may be performed later, if
required). If the CO
2
readings are normal, and still the error code remains, the temperature or relative
humidity sensor can be defect or the connections to these are broken.
Please remark: If several errors are detected at the same time the different error code numbers
will be added together into one single error code!
… 13


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