OPERATION ST51A/ST75A/ST75AV Mass Flow Meters
54 Fluid Components International LLC
Command 48, Additional Device Status Bytes
Table 17 below summarizes the Command 48 Additional Device Status bytes. This is a 6-byte field of which only the first 2 bytes (bytes 0
and 1) are used by the instrument. The remaining bytes (2–5) are unused/reserved. A status bit is cleared (0) for no error. A status bit is
set (1) when an error (or condition) is detected.
Table 17 – Command 48, Additional Device Status Bytes Bit Assignments
Byte 0
Temperature < Customer Min Temperature
Temperature > Customer Max Temperature
Byte 1
Delta_r > drNamur_max OR Delta_r < drNamur_min
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