Dwyer UFM - Manual (Page 27)

F - UFM
Issue 1.4 Page 27
12
Appendix III – Error and Warning Messages
12.1 System errors
There are three possible ‘System Error’ messages that can be displayed. They are:
1. Poor Signal. The unit is unable to detect a signal from one or both transducers. If this
message persists the sensors will need to be relocated.
2. Pulse Overflow.
The value for the ‘Vol per pulse’ is set too low. Increase the Vol per
Pulse setting in the password-controlled menu.
3. No BBME: This indicates a unit failure. Reset the unit by turning the power on and off.
Contact Dwyer Instruments, Inc. if the problem persists.
12.2 Warnings
These generally advise the user that the data entered is out of the specified range.
1. When an invalid Pipe ID is entered, the warning message shown below is displayed,
prompting the user to enter a value between 0.79 and 4.33 inches.
2. When the 4-20 mA current output is turned ON, the Flow at Maximum and Minimum current
can be changed under password control. The valid range is 0
– 99999.0 If an invalid value is
entered the following warning message is displayed:
3. When programming a Frequency Pulse output the frequency is limited to the range 1 to 200
Hz. If an invalid value is entered then the following warning message is displayed.
Range 0.79 – 4.33
0.000 inches
Range 0 - 99999
0000.0
Range 1 - 200
200Hz