Installation Instructions Manual

Display Options for Current Output Values and HART Variables

To select the displayed measured
values or current output values, use the  and 
buttons.

To select units for measured values, use the Unit menu.

Every time the isolated barrier receives a HART command 3 message from the field
device, t
he display is updated.

The isolated barrier displays the current output values as a four-digit number. The
decimal point is set to provide the best possible resolution.

The isolated barrier shows the floating point value for HART variables as follows:
• If possible, as a fo
ur-digit number with decimal point and without exponent.
Negative values are shown on the device with three digits because of the
minus sign.
• A digi
t is rounded as necessary. For example, the number 0.3456 is shown as
0.346.
• If the
isolated barrier cannot show the floating point value, the mantissa and
exponent are shown in alternation.
Fault Message
The following table shows which fault message the current outputs send
to the controller,
Bul. 937C HART Loop Converter Installation Instructions
45
based on the characteristic
Setting 4 - 20 unlimited 4 - 20 NE43
down 0 mA
Cannot be distinguished from falling
below the start value
2.0 mA
up approx. 23 mA
Cannot be distinguished from the end
value being exceeded
21.5 mA
hold Last measured value before the fault