Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / carl_ellis
Given that 2 wire loop powered transmitters need approvals
for use in hazardous areas to be competitive, most, if not
all, transmitters regulate what changes can be made to
their products by limiting what spare parts or updates can
be made to an original product.
A hazardous area approval (FM, ATEX) is granted for the
transmitter as it is submitted to the approval agency.
Changes to the transmitter require re-approval with all the
associated costs of re-approving a device.
Changing the internal firmware or any of the internal
hardware would void the approval on the original device.
That could make the manufacturer liable in case of failure
of the instrument.
Firmware revisions are not offered for the base functions
of field transmitters.
An accessory item, like a digital display, that is not a
core element of the measuring and reporting function can
sometimes be swapped out with other units of different
firmware versions.
Sensor bodies for pressure transmitters and entire
electronic heads can be exchanged, or entire electronic
card assemblies can be exchanged, but firmware updates are
not available for devices that have agency approvals for
hazardous areas.
Software drivers for communications protocols change over
time and matching the firmware revision of a field
transmitter to its DD (Device Descriptor) or EDDL or DTM or
DOF file can be a challenge, but these are software files
used by communicators or PC/modem communication software.
The instrument manufacturer posts these kinds of files on
their web sites for download.
Carl Ellis
Measure First
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
what is the difference between active & reactive power?
I need control valve ISA hand book. Is there any site to download that big book containing all the pages. Written by Paul Friedmann
what is interface level measurement.who can calibrate interface level measurement transmitter online
Operational amplifiers
How to calibrate Toxic gas detector?
sir, give me placement papers and interview quistion of birla group company of copper.
How do you identify an orifice in the pipeline?
while i check zero check for dp flow transmitter some fluctuating came (0 to 458 kg/h) what is the reason?
I need to know steps to Calibration Valve Guard......
whatis range of marcury filled tempereture gague
How many are the types of instrument cables in terms of No. of pair.
How can i copy program (parameter) from mm440 (V.F.D.) by using BOP?
Draw block digram for well head from well to shipping pump?
what are the values of fuel flow rate in various places in boiler.
what is compensation? temprature & pressure
