KROHNE H250 M40 EN - Manual (Page 36)

6
OPERATION
36
H250 M40
www.krohne.com 11/2012 - 4000640702 MA H250 M40 R02 en
Operation
6.1 ESK4- Loop Check Modus
The ESK4 is equipped with a loop check function, enabling a simple test of the entire 4…20mA
current loop.
It is activated and operated using a microswitch 1.
• Press and hold the microswitch 1 for more than 6 seconds to activate loop check mode 3.
The current output jumps to constant 4mA.
• Change the current output from constant 4 to constant 20mA 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.
CAUTION!
When activating the loop check mode, ensure that no alarms are unintentionally triggered in the
downstream system components.
INFORMATION!
If the microswitch has not been pressed for longer than 60 seconds, the ESK4 automatically
reverts to measuring mode 2.
MA_H250_M40_R02_en_640702_PRT.book Page 36 Wednesday, November 28, 2012 12:23 PM