KROHNE UFM 3030 Service EN - Manual (Page 40)

40 UFM 3030
Part C Functional checks and service
7 Functional checks
7.1 Test functions of the signal converter Function 2.1 to 2.5
The signal converter has several different test functions.
Display test, Function 2.01.01
Select function 2.01.01 as described in sect. 4.2 and 4.3.
Press Right arrow to start.
All segments in the 3 lines of the display are activated sequentially.
The test can be terminated by pressing the
↵
(return) key.
Test, current output I, Function 2.02.01
WARNING – this will affect the current output, and will no longer be process output!
A milliamp-meter must be connected between terminals V+ and I for this test, see the connection
diagrams in section 2.
Select Function 2.02.01 as described in sect. 4.2 and 4.3.
Select current value with
↑  key:
•
0 mA
•
4 mA
•
12 Ma
•
20 mA
•
22 mA
The milliamp-meter indicates the current value selected. Press the
↵ 
key to terminate the test and
display the actual value again
Test, frequency output F, Function 2.02.02
WARNING – this will affect the pulse/frequency output, and will no longer be process output!
An electronic Totalizer (EC) must be connected to terminal P.
 for this test.
Select function 2.02.02 as described in sect. 4.2 and 4.3.
Select frequency value with
↵
key:
•
1 Hz
•
10 Hz
•
100 Hz
•
1000 Hz
•
2000 Hz
The Totalizer indicates the frequency value selected.
Press the
↵
key to terminate the test and display the actual value again.
Test of the analog inputs ( if applicable) 2.03.01 or 2.03.02
Connect a current source to terminal A1/GND or A2/GND.
Select Function 2.03.01 or 2.03.02.
Set the current source to a value 4..22mA.
Read the measured value from the display of the flow meter.
Press '<-' to terminate the test.
WARNING: a current >30mA will result in damage of the analog input. Make sure the current will
not exceed the 30mA.