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•
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442-D
Figure 6-2
HART
function matrix
6.6 Description of unit functions
The following table contains a listing and description of all functions of the HART
protocol that can be used for setting up the
temperature transmitter.
Note:
Factory default values are shown in bold text. The HART
operating module (DXR275) display is
indicated by the following symbol.
Function group: WORKING PARAMETERS
Primary value
•
V0H0
•
(PV)
Display of actual measured temperature
Display: 7-digit number with floating decimal point and engineering unit.
(e.g. 199.98 Ohm; -62.36 deg. C)
Int. temperature
•
V0H1
Display of the actual measured temperature of the internal comparison measurement point.
Filter time
•
V0H2
Digital filter selection 1
st
grade.
Input: (0 to 100) seconds
0 s
RJ Mode
•
V0H3
Selection of internal (Pt100) or external (0 to 80)
°
C cold junction compensation.
Entry: Internal; External
Internal
RJ External Value
•
V0H4
Entry of external cold junction value.
Entry: (-40.00 to 85.00)
°
C (
°
C,
°
F, K)
0.00
°
C
Hint! Entry only possible on selection of an external cold junction compensation in unit function
RJ MODE.
Bias Input
(Offset)
•
V0H5
Entry of zero point correction (Offset).
Entry: (-10.00 to 10.00)
°
C (
°
C,
°
F, K)
0.00
°
C
Hint! Entry returns to factory default values when changing sensor type!
