DRAFT - 11 December 2014
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DRAFT - 11 December 2014
DRAFT - 11 December 2014
INM MTL4850_54 Rev4
6.3 Routine maintenance
It is advisable to check the general condition of the installation occasionally to make sure that
no damage or deterioration has occurred. The following should be checked at least once every
two years (more frequently for particularly harsh environments):
1. Modules are of the types specified in the relevant documentation and are mounted in the
correct positions on the associated backplanes.
2. Modules and hazardous area connectors are correctly and legibly tagged; that the
connectors are plugged into the matching modules and that the tag details given comply
with the relevant documentation.
3. Modules and hazardous area connectors are securely plugged into their matching sockets.
4. All connections to the backplane, and to the hazardous area connectors, are properly made.
5. Connecting cables to backplanes and to the hazardous area connectors are of the specified
type and rating. They should be correctly routed and segregated and not frayed or otherwise
damaged.
6. Cable screens are properly earthed.
Caution:
It is strongly recommended that users only undertake the tests and routine maintenance
described in sections 6.2 and 6.3.
If an MTL4500 module is judged faulty, repairs or modifications
MUST NOT
be made as these
may affect the intrinsic safety of the module. For repair or replacement, any faulty units or
backplanes should be returned to MTL or the representative from which they were purchased.
7
SOFTWARE CONNECTIVITY
7.1
Introduction
The MTL HART system provides access from a PC to the HART field devices for configuration,
diagnostics and the monitoring of device performance. HART devices may be selected for
regular status monitoring, and an alert issued if the status changes. An internal alarm log is
also maintained which may be accessed through the Instrument Management Software (IMS)
package - see Appendix B for further details.
In addition, MTL’s HART connection system supports dedicated software packages for valve
positioners to optimise valve maintenance schedules.
7.2
Communication modes
Many of the IMS packages available are based upon the use of Device Driver (DD) files or upon
FDT Technology as a frame for the various communication elements.
MTL provides the software driver files to support each of these approaches.
The example below shows the integration of an MTL4850 HART Multiplexer within the Emerson
AMS package applying the MTL4850 DD file.
