User Manual

10
The IT 300N is provided with extensive self checking which assists the user in the location of setup entry errors
and in reporting malfunctions or unusual operating conditions. When an error occurs, the display will flash. Press
any key to see the error message corresponding to the error that has occurred. Press any key again to acknowl-
edge the error. (If the error can be eliminated by a change of setup values, the unit will automatically advance to
the MENU so that the appropriate setup changes can be made).
Table - 2 illustrates the warning message, problem, and recommended corrective actions.
Diagnostic Error Messages Table-2
WARNING MESSAGE CAUSE CORRECTIVE ACTION
Rate Low set Set Rate Hi greater
higher than Rate Hi than Rate Lo
Factor = 0 Set in correct Factor
“BAT” Descriptor Low Battery Replace battery(ies)
Total rollover None required
Rate exceeds 59999 Use lower rate dec point
Pulse out Overflow Use different pulse scaler or
totalizer decimal point
ANALOG OUTPUT CALIBRATION
Full Scale Adjust:
The 4-20 mA has been accurately set to 20.000 mA by the factory. No adjustments should be required.
The 4-20 mA output may be verified periodically by installing a digital milliamp meter in series with the analog
output and simulating a full scale or over range flow rate.
The Full scale adjustments may be trimmed to 20.000 mA +/- .020 mA if required. To adjust, locate the span adjust
potentiometer mounted on component side of PCB, above the display to the left (rear view). Turn clockwise to
increase the current output, counter-clockwise to reduce.
The 4 mA is set automatically.
ERROR MESSAGES