KROHNE OPTIMASS with MFC 05x EN - Manual (Page 77)

Installation and Operating Instructions OPTIMASS 76
Testing alarm output Fct. 2.7
This is a simple function that allows the alarm output to be tested at both its high and low states.
Display Key
Line 1 Line 2
→↑ Fct. (2) TEST
→ Fct. 2.(1) DISPLAY
↑ x 6 Fct. 2.(7) Alarm out
→ SURE (NO)
↑ SURE (YES)
↵ (Level Low)
0V on the output
↑ (Level High)
+24V on the output *
↵ Fct. 2.(7) Alarm out
* Actual voltage depends on supply if using a PASSIVE status output
Testing control input Fct. 2.8
This function allows the state of the control input signal to be tested.
Display Key
Line 1 Line 2
Fct. 2.(7) Alarm out
↑ Fct. 2.(8) Control inp.
→ SURE (NO)
↑ SURE (YES)
↵ Level HIGH or LOW depending on input voltage
↵ Fct. 2.(8) Control inp.
Line 2 of the display shows the current state of the input.
•
HIGH = 4...24 Volts,
• LOW = 0...2 Volts.
As the voltage on the input changes so the display will change from HIGH to LOW accordingly. However,
whilst using the test function no action will be taken in response to the input
(i.e. the total will not be reset).
Note:
If the input is disconnected it will read LO