GE Sensing - Panametrics - ultrasonic transit-time flowmeters - Obsolescence of Option Card Serial EEPROM (UPDATED)
Technical Background
Option
cards used in the XMT868i, XGX868i, DF868 and GX868 Flowmeters contain a serial
EEPROM that is used to store information locally on the PCB. This information
includes PCB number, group number and calibration data. The serial EEPROM is
read during meter startup and written to during the calibration process.
The
EEPROM used before September 2010 is obsolete. There is a similar part that is
widely available however and this new part is a hardware (HW) drop in
replacement but requires software (SW) modification.
The
main SW of the above meters requires changes to communicate with the new serial
EEPROM. The SW is backwards-compatible meaning it will
communicate with either new or old EEPROM.
How could this affect a customer?
If
a customer adds an option card with the new serial EEPROM it will not be
recognized by older versions of system SW. The customer will need to upgrade
the system SW per SW update list below.
There
is no problem adding an older? option card to a newer
system with updated SW. The new SW will recognize old or new EEPROM.
List of Affected Option PCBs
XMT868i/
XGX868i Flowmeters
703-1215 Digital Out
703-1225 Analog Out Digital Out
703-1345 Modbus
703-1385 HART
703-1430 Analog In 4 Channels
703-1473 Analog In Digital Out
703-1474 Foundation Fieldbus
703-1477 Modbus TCP
DF868/GX868
Flowmeters
703-1326 Analog Out
703-1358 Modbus
703-1394 HART
703-1421 Analog Out
703-1442 Analog In
703-1475 Modbus TCP
703-1491 Foundation Fieldbus
SW Update Rev List
XMT868i X3D
XGS868i Y4CS
XGM868i Y4BM
DF868 F2AG
GF868 GF3Q
GM868 GM3Q
GS868 GS3N
CTF878 INST 1E
IGM878 INST 1H
GC868
GC4C
Effectivity of the Change
As
of about September 2010 all the above meters have been using the new version of
software which allows use of old or new option cards.
As
of April 1, or thereabouts, all of the above option cards in all of the meters
will be converted to the new EEPROM.
An
exception is the GF868 with HART. This special version of software has not been
updated to use the new EEPROM at this time. A supply of the older EEPROMs will
be reserved for use in option cards in GF868 with HART until the software can
be revised.
Dave Thomson
DMT Instruments
P: 352-564-8004 |