pyroscience Pico-pH-SUB, Руководство пользователя

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Pico-pH-SUB | Manual
© PyroScience GmbH 19
5.4.2 MEA – Trigger Measurement
This command triggers a measurement and returns the results.
Command:
MEA ˽ C ˽ S ↵
Response:
MEA ˽ C ˽ S ˽ R
0
˽ R
1
…R
17
↵
Input Parameters:
C
Optical channel number. Set C=1.
S
If in doubt, then set S to 47!
This parameter defines the enabled sensor types,
given as decimal representation of the following bit field:
Bit 0 (add 1): optical channel
Bit 1 (add 2): sample temperature (typ. the external Pt100-
sensor)
Bit 2 (add 4): ambient air pressure
Bit 3 (add 8): relative humidity within the module
Bit 4 (add 16): reserved
Bit 5 (add 32): case temperature (temperature within the
module)
Example: S = 1 + 2 + 4 + 8 + 32 = 47 means, that the command will trigger
the following measurements: optical channel (pH), sample temperature, case
temperature, ambient air pressure, and relative humidity within the module
housing.
Output Parameters:
R
0
Returns errors and/or warnings of the last measurement as a decimal
representation of the following bit field. The user has to distinguish between
warnings and errors. A warning indicates, that the measurement results are
in principle still valid, but their precision and/or accuracy might be
deteriorated. An error means, that the respective measurement result is not
at all valid.
Bit 0 (add 1): WARNING - automatic amplification level active
Bit 1 (add 2): WARNING - sensor signal intensity low
Bit 2 (add 4): ERROR - optical detector saturated
Bit 3 (add 8): WARNING - reference signal intensity too low
Bit 4 (add 16): ERROR - reference signal too high
Bit 5 (add 32): ERROR - failure of sample temperature sensor
(e.g. Pt100)
Bit 6 (add 64): reserved
Bit 7 (add 128): WARNING high humidity (>90%RH) within the
module
Bit 8 (add 256): ERROR - failure of case temperature sensor
Bit 9 (add 512): ERROR - failure of pressure sensor
Bit 10 (add 1024): ERROR - failure of humidity sensor
Example:
R
0
= 34 = 2 + 32 means, that there is a warning about low signal
intensity of the optical sensor, and that the external temperature sensor
(Pt100) had a failure.
If
R
0
= 0 then no error or warning appeared.