Dwyer PSX2 - Manual (Page 151)

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(3) Error code: E3
Display the fl ow velocity profi le measurement.
(1) E3: Measurement range error (2) E3: Frequency calculation error
(3) E3: Success rate
(4) Error code: E4
Display the analog input/output error.
(1) E4: Range over (2) E4: Analog inout error
Bulletin F-9-PUX2