57
Note.
The output current of the E module is a “pure” analog signal without
any embedded HART signal.
Notes applying to both the
ET: I(gen)
and the
E: I(control)
ports:
Check the polarity of your connections. The arrows in the previous
pictures describe the correct flow of current.
If the loop resistance of the external circuit is too high or infinite, the
message “
O.LOAD
”
is displayed until the load is reasonable.
Warnings!
Make sure that you don’t exceed the maximum current allowed
by the instrument under test.
If you open the mA generation loop, MC5P tries to maintain the
current by increasing the output voltage. If you then close the
loop again, the current is first too high, but returns quickly to
the correct level. If this current peak could damage the compo-
nents of the loop, make sure that the loop will not open or pro-
tect it against overcurrent. For the same reason, always enter
0 mA output before connecting the loop.
Next…
Current Measurement
on page 37
Special Generations
on page 65
Calibration
, see Part D.
Generating/Simulating
