KROHNE OPTIMASS with MFC 05x EN - Manual (Page 75)

Installation and Operating Instructions OPTIMASS 74
5.2 Menu 2 – Functional Checks
Menu 2.0. contains a number of test functions. These allow the current, frequency and alarm outputs to be
driven at a number of fixed test levels, so that the communication between the converter and the
customer's equipment can be verified. In addition, other functions allow various measured parameters from
the primary head to be viewed directly for trouble shooting purposes.
Testing the display Fct. 2.1
This function sends a test sequence to the LCD display which causes each element of the display to be lit
in sequence. If any segments fail to light, this indicates that the display is faulty and should be replaced.
Begin from measuring mode.
Display Key
Line 1 Line 2
→↑ Fct. (2). TEST
→ Fct. 2.(1) DISPLAY
→ SURE (NO)
↑ SURE (YES)
↵ Display starts test sequence.
All segments are lit and flashing
The test may be terminated at any time by pressing the ↵ key.
Testing current output 1. Fct 2.2
This function allows a number of fixed current levels from 0...22 mA to be driven from the current output.
This function interrupts the normal operation of the output, so the operator will be asked if he is sure before
the test commences.
Display Key
Line 1 Line 2
→↑ Fct. (2). TEST
→↑ Fct. 2.(2) Cur.out.1
→ SURE (NO)
↑ SURE (YES)
↵ (0 mA)
0 mA is output
↑ (2 mA)
↑ (4 mA)
↑ (12 mA)
↑ (16mA)
↑ (20 mA)
↑ (22 mA)
↑ (0 mA)
Press the ↵ key at any time to stop the test and return the output to normal operation.
Note:
Test points 0 mA and 2 mA not available on MFC 051 Converter
Systems with two or three current outputs Fct. 2.3 and 2.4
The same procedure is used to test current outputs 2 and 3 if fitted. Current output 2 is in Menu 2.3 and
current output 3 is in menu 2.4.