6
OPERATION
40
H250 M40
www.krohne.com
03/2020 - 4000640706 - MA H250-M40 R06 en
6.1 ESK4A - Loop Check Mode
The ESK4A is equipped with a loop check function, enabling a simple test of the entire 4
…
20 mA
current loop.
It is activated and operated using a microswitch
1
.
•
Press and hold the microswitch
1
for more than 6 seconds to activate the loop check mode
3
.
The current output jumps to constant 4 mA.
•
Change the current output from constant 4 mA to constant 20 mA as often as you like by briefly
pressing it (less than 6 seconds) to check the function of the measuring circuit.
•
Exit loop check mode by holding down the microswitch (longer than 6 seconds). The current
output jumps back to measuring mode
2
.
Figure 6-1: Position of the microswitch
CAUTION!
When activating the loop check mode, ensure that no alarms are unintentionally triggered in the
downstream system components.
Figure 6-2: Loop Check Mode
INFORMATION!
If the microswitch has not been pressed for longer than 60 seconds, the ESK4A automatically
returns to measuring mode
2
.
