Commissioning Cerabar M, Deltabar M, Deltapilot M / 4...20 mA HART
74 Endress+Hauser
!
Note!
It is not permitted to reverse the assignment of the measuring points to the direction of
communication. The measured value of the transmitting device (via burst) must always be greater
than the measured value of the receiving device (via the "Electr. Delta P" function).
Adjustments that result in an offset of the pressure values (e.g. position adjustment, trim) must
always be performed in accordance with the individual sensor and its orientation, irrespective of the
"Electr. Delta P" application. Other settings result in non-permitted use of the "Electr. Delta P"
function and can lead to incorrect measured values.
3 The Cerabar M/Deltapilot M is unpressurized, perform position adjustment , see ä 56.
4 Set the output current to "Fixed" 4.0mA via the "Current mode" parameter.
Menu path: Expert Communication HART Config.
5 Configure an address <> 0 via the "Bus address" parameter, e.g. bus address = 2
(HART 5.0 master: Range 0 to 15, where address = 0 calls up the "Signaling" setting; HART 6.0 master: range 0 to
63)
Menu path: Expert Communication HART Config.
6 Activate the reading of a value sent externally in burst mode via the "Electr. Delta P" parameter.
Menu path: Expert Application
7 Result: The measured value output by the Cerabar M/Deltapilot M on the low pressure side equals the differential:
high pressure - low pressure, and can be read out by means of a HART request of the address of the Cerabar M/
Deltapilot M on the low pressure side.
Description
Adjustment of the Cerabar M/Deltapilot M on the low pressure side (the differential is generated in this
device)
To Next Page
Loading...
