64
RFT9739 Rack-Mount Transmitter Instruction Manual
Startup
continued
6.3
Custody transfer event
registers
Event registers are provided for security requirements for custody
transfer applications. When the transmitter is configured for security
mode 8 (see Section 2.3, page 5), the transmitter meets security
requirements for custody transfer described in National Institute of
Standards and Technology (NIST) Handbook 44.
Custody transfer event registers record one change for each change
"session." A change session begins when the transmitter is taken out of
security mode 8, and ends when security mode 8 is reentered. To begin
a change session, set switches 1, 2, and 3 to the OFF position. A
change session ends when switches 1, 2, and 3 are reset to the ON
position. After a change session ends, security event registers will
increase by one (1) if any of the parameters listed in Table 6-2 have
been changed.
• Each register will increase up to 999, then roll over to zero.
• Custody transfer event registers cannot be reset.
View the security event registers using any of the following methods:
• With the RFT9739 display. If the transmitter has a display, event
registers can be viewed from the CONFIG REG and CALIBRATE REG
screens when the transmitter is configured for security mode 8.
• With ProLink software version 2.3 or higher. Refer to on-line help for
instructions.
• With AMS software. Refer to on-line help for instructions.
• With a HART Communicator.
• With a HART-compatible or Modbus-compatible master controller.
Table 6-2.
Parameters that affect
event registers
Configuration register
Mass flow cutoff
Flow damping
Volume flow cutoff
Flow direction
Primary mA scaling factors
Secondary mA scaling factors
Primary mA output trim
Secondary mA output trim
Primary mA output assignment
Secondary mA output assignment
Control output assignment
Master reset
Calibration register
Mass flow units
Volume flow units
Auto zero calibration
Density calibration
Flow calibration factor
Meter factors
Frequency output scaling factors
• Frequency
• Rate
Density calibration factors
• Density A and Density B
• K1, K2, and FD
• Density temperature coefficient
Pressure compensation factors
• Flow factor
• Density factor
• Flow calibration pressure
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