BEAMEX MC4 - Switch State Sensing

Measuring
48 MC4 User Guide
Switch State Sensing
MC4 is capable of detecting switch's state both when the switch is
free of external potential and switches with DC voltages within the
range -1 V to +30 V.
Function: Switch
Also check the Trigger Level setting. There you can specify
whether to use only a trigger voltage level or do you also want MC4
to include a test voltage to detect switches with no external potential.
All voltages below the trigger level are treated as a closed contact
and all voltages above the trigger level are treated as an open
contact.
The following picture displays the active terminals:
M e a s u r e
M a x 6 0 V , 3 0 V , 1 0 0 m A
T / C
m V
s e n s e
R , R T D R m e a s
V , I ,
V , I ,
T e m p e r a t u r e / G e n e r a t e
When switch state sensing is
selected, the extra row info of the
window with the Switch Function
is capturing measurement values
of the other window every time the
switch changes its state. In the
adjoining screen shot, the switch's
current state is "open" (the big
switch symbol). The last time the
switch opened, the pressure was
3.058 bar and the last time the
switch closed, the pressure was
1.983 bar.
S e t u p

S e t u p

M e n u
 b a r
1 0 . 1 0 . 2 0 0 5 1 5 : 4 0 : 2 2
 S w i t c h
G a u g e
I N T
3 . 3 4 5
3 . 0 5 8 1 . 9 8 3
Notes.
The accuracies of the captured values depend greatly on the change
rate of the switch's input signal.
Hint!
Switch state detection may also be used for binary signal detection.
An open switch equals "1" or true" and a closed switch equals "0" or
"false".