nVision
Operation Manual
•
Page 19
Current.Mode
The nVision is capable of measuring current in two different modes. They are:
•
mA:
Measured current is displayed (mA).
The module is capable of measuring inputs up to 25mA
•
4–20%:
Current is displayed as a percentage of the 4–20mA current range of the module.
Where: 4mA = 0%, and 20mA = 100%
Both current modes are available for use if current is measured in the standard or
HART connection schemes.
.
X
Current.Measurement
The nVision may be used to measure current up to
25mA. Select the desired current mode through
the Setup menu to properly configure the nVi-
sion prior to connection and use. The illustration
denotes the proper current measurement connec-
tion scheme to the MA20 module.
.
X
Current.Measurement.with.HART.Resistor
The nVision may be used to measure current in a
circuit that includes a HART transmitter or device.
For devices that use the HART protocol, a load re-
sistor must be placed in the loop. The HART input
on the MA20 provides a 250 Ohm load resistor. Se-
lect the desired current mode through the Setup
menu to properly configure the nVision prior to
connection and use. The illustration denotes the
proper HART resistor connection scheme to the
MA20 module.
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