BEAMEX MC4 - Current Measurement

Current Measurement
MC4 User Guide 41
Current Measurement
MC4 supports current measurement using either MC4 as the loop
power supply while at the same time measuring the current or simply
measuring the current while an external power supply is used.
Function: Current Meas., Supply On or
Current Meas., Supply Off
Also check the HART Compatible Loop Supply setting if you use
MC4 as the power supply. When the option is checked, MC4 adds a
suitable impedance to the loop to ensure HART communication.
Make sure the polarity of your connections is correct. The following
pictures present the correct connections depending on whether MC4
is used for providing loop supply or not.
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
I n s t r u m e n t t o
b e c a l i b r a t e d
" S u p p l y o n "
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
I n s t r u m e n t t o
b e c a l i b r a t e d
P o w e r
S u p p l y
" S u p p l y o f f "
Information concerning current measurement parallel to a test diode
can be found in part C, chapter Current Measurement Parallel to a
Test Diode, Connections on page 120.
Next
Current Generation on page 56.
Tools Menu on page 67.
Alarms on page 69.
Calibration, see Part D.