Dwyer Series PUB - Manual (Page 37)

5: Troubleshooting
33
4-20mA ERRORS
mA out > Max Interpretation: The actual flow is higher than the maximum set on the mA range.
Response: Re-scale the 4 to 20 mA output to be able to cope with the higher flow – see
page 24.
Calibration 20mA
Error! NOTE: The 4 to 20 mA output is calibrated before the instrument leaves the factory and
should not require further adjustment.
Interpretation: You have adjusted the DAC outside its accepted range when calibrating
the 20 mA signal output.
Response: Re-calibrate the 4 to 20 mA output – see page 24.
Calibration 4mA Error! NOTE: The 4 to 20 mA output is calibrated before the instrument leaves the factory and
should not require further adjustment.
Interpretation: You have adjusted the DAC outside its accepted range when calibrating
the 4 mA signal output.
Response: Re-calibrate the 4 to 20 mA output – see page 24.
SET-UP ERRORS
Pipe OD out of range Interpretation: You have entered an out-of-range value for the pipe outside diameter
dimension – i.e. larger or smaller than the unit or sensor can be used on.
Response: Enter a valid number.
Wall thickness out of
range Interpretation: You have entered an out-of-range value for the pipe wall thickness
dimension – accepted range is 0.4 to 3 inches (1 to 75 mm).
Response: Enter a valid number.
Lining thickness out of
range Interpretation: You have entered an out-of-range value for the lining thickness
dimension – acceptable range is 0 to 0.4 inches (0 to 25 mm).
Response: Enter a valid number.
Temperature range Interpretation: You have entered an out-of-range value for the fluid temperature.
Accepted temperature range -4°F to +572°F (-20°C to +300°C).
Response: Enter a valid number.
Invalid Date or Time Interpretation: The entered Date or Time is invalid, or when setting up ‘timed’ data
logging the Stop time is set earlier than the Start time.
Response: Enter a valid Date and Time.