KROHNE BM 102 HART User Manual

Page 4

BM102 Remote Operation - HC 275 / AMS

Dev.-Rev. EC, DD-Rev. 01

Page

3 HART® Communicator 275 (HC275)

3.1 Installation

The HC275 has to be programmed with the BM102 HART® Device Description (DD). Otherwise
the HC275 user can only use the generic commands of the HC275 without being able to access the
entire instrument control.

3.2 Operating

Refer to the BM102 Menu Tree HC275 (Attachment A).
The BM102 operating concept is based on the HART



DD for generic devices with the following

differences :

•

There are additional specific parameters such as Probe length, Tank height, Dead zone,

Thresholds…

•

There are additional specific commands for the device calibration:

Offset calibration, Automatic probe length calculation…

•

Display format dependent on measuring range

•

BM102 specific status messages can be displayed

•

To “open” service functionality the user has to log in as specialist. To do this, one should invoke

the “Service Code” command (item 3 ➪ 2 of the HC275 Menu Tree) and enter the correct
service password. After the HC275 is switched off (or the same command is invoked with a
wrong service password) specialist authorization is lost, and all service parameters/functions
again become inaccessible.

Without the BM102 HART



DD, we can only modify the current output configuration. This is the

reason why it is difficult to install and configure the device without the specific DD.

3.3 Offline

mode

Offline parameters:
Unit Name, Unit Factor,
Length Unit, Volume Unit,
Tank height, Probe Length, Dead Zone, Detection Delay, Time Constant,
PV, SV, TV, QV,
Function I, Range I, Error Delay, Scale I min, Scale I max,
Tag, Message, Descriptor, Date.

Restriction:
If PV and Function I are not equals, error messages could appear during configuration transfers.
Attention: Scale I min, Scale I max are linked to Function I and PV .