30
Hauser
HART Loop Converter HMX50
Selecting an Assignment
The values of the selected HART variable (PV, SV, TV, QV) are shown on the current output.
The number of available variables depends on the HART field device. When selecting
disabled, the downscale fault current of 0 mA or 2 mA is constantly present at the current
output, depending on the characteristic.
1. Select the desired HART variable using the
▴
or
▾
buttons.
2. Confirm your selection with OK.
Defining a Characteristic
The choice of characteristic defines the limits for measuring underrange and overrange.
Measuring underranges or overranges outside the specified range cannot be analyzed. If
measuring ranges are undercut or exceeded, the minimum or maximum value is issued
constantly.
1. Select the characteristic using the
▴
or
▾
buttons.
2. Select the characteristic 4 - 20 unlimited.
For the characteristic 4 - 20 unlimited, measuring underranges are analyzed linearly
up to 0 mA, and measuring overranges are analyzed linearly up to approx. 23 mA by
the device.
3. Select the characteristic 4 - 20 NE43.
For the characteristic 4 - 20 NE43, measuring underranges are analyzed linearly up to
3.8 mA, and measuring overranges are analyzed linearly up to 20.5 mA by the device.
4. Confirm your entry with OK.
Defining the Start Value
Make sure during configuration that the start value is at least 1% less than the end value. If
the start value does not meet this requirement, the start value will not be accepted by the
device.
1. Enter the start value as a floating point figure. For entering floating point figures, see
chapter 3.4.4. The defined unit from the Unit menu is used as the unit. See chapter
2. Confirm your entry with OK.
BA00371FEN_1417.fm Page 30 Tuesday, August 15, 2017 4:08 PM
