Dwyer PSX2 - Manual (Page 150)

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10.8.2 Action on error
(1) Error code: E1
Display the instrument abnormality.
(1) E1: Device error 1 (2) E1: Device error 2
(2) Error code: E2
Display the fl ow rate abnormality.
(1) E2: Windows scan (2) E2: No-received signal
(3) E2: Received signal error
(4) E2: Calculation error
Bulletin F-9-PUX2