Current Measurement Parallel To A Test Diode, Connections - BEAMEX MC5-IS User Manual

Current Measurement Parallel to a Test Diode, Connections

The impedance of MC5-IS' milliampere input is low enough to enable current measure-
ment parallel to a test diode in a 20 mA circuit. Connection:
Plus Side Test Diode
X
Input signal
I
T/C INT. RJ
T/C, Low V R, RTD
T/C
WIRES
ONLY
meas/sim
SENSOR MEASURE & SIMULATE
+
HART I I
4 w meas ®
meas/sink meas/sink
I
V, ,
sink
V, , Com Com
3 w meas
Uo: 16 V
Io: 24 mA
Po: 145 mW
OUTPUT MEASURE
ET E
Low V
MC5-IS parallels the test diode of the transmitter and measures
the externally supplied output current of the transmitter. For more
information concerning test diode connections of HART instru-
ments, see Appendix 1, chapter Connecting MC5-IS and a HART
Instrument on page 131.
Note.
In higher temperatures: The leakage of the diode in the instrument
may affect the accuracy.
Additional Information
Minus Side Test Diode
+
X
Input signal
-
T/C INT. RJ
T/C, Low V
T/C
WIRES
ONLY
SENSOR MEASURE & SIMULATE
+
I
HART I I
4 w meas ®
meas/sink meas/sink
R, RTD I
V, ,
sink
V, , Com Com
meas/sim 3 w meas
Uo: 16 V
Io: 24 mA
Po: 145 mW
OUTPUT MEASURE
ET E
Low V
+
-
95