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Reference, Installation, and Operations Manual Upgrading a Mark II to a Mark III
3-9000-743 Rev S June 2013
Meter electronics upgrade 299
AI
Appendix C Upgrading a Mark II to a Mark III
C.1 Meter electronics upgrade
This section describes the important differences between the Daniel Mark II and Mark III meters.
This section also includes instructions on how to upgrade a Mark II meter to use the Mark III
electronics using the Daniel MeterLink configuration conversion feature.
C.2 What’s new In Mark III
The Mark III meter electronics offers many new and improved features over the previous Mark II
design as discussed below:
• F
ASTER UPDATE RATES. The Mark III uses a newer, faster processor with a double-precision
hardware floating-point unit. This allows for faster transducer firing rates resulting in
faster data updates. The Mark III meter offers two update rates: rapid (0.25 sec) and
standard (1 sec) versus the typical Mark II update rate of about 5 seconds (for a
SeniorSonic
TM
meter).
• AGA8 D
ETAIL METHOD. The Mark III meter adds the AGA8 Detail method for calculating
compressibilities.
• O
PTIONAL AGA10 SOUND VELOCITY CALCULATION AND COMPARISON. The Mark III meter optionally
calculates the AGA10 sound velocity and compares it on an hourly averaged basis to the
meter-measured sound velocity.
• E
NERGY RATE CALCULATION. The Mark III meter calculates the energy rate (if the heating value
is available). The energy rate is available for output on the frequency outputs and optional
analog output.
• M
ASS RATE CALCULATION. The Mark III meter calculates the mass rate if the gas flow-
condition mass density is available (either specified or calculated as part of AGA8). The
mass rate is available for output on the frequency outputs and optional analog output.
• O
PTIONAL GAS CHROMATOGRAPH INTERFACE. The Mark III meter optionally interfaces to a
Daniel gas chromatograph via Modbus for retrieving live gas property data. This feature
requires use of the Option Board.
Daniel CUI version 4.21 is the final version that supports Daniel Mark II Gas Ultrasonic
meters. If you are communicating with a Daniel Ultrasonic Mark II Gas Flow Meter, you do
not need to uninstall version 4.21 or earlier versions of Daniel CUI before installing
MeterLink. Version 4.21 and earlier versions of Daniel CUI should not be run simultaneously
with MeterLink.