Fluid Components International CMB - Manual (Page 97)

14. Use of the CT for custody transfer operations
The CT functions are basically the same in Standard mode and Custody transfer mode. In both modes,
the various CT security mechanisms are activated in compliance with international standards for custody
transfer operations OIML R 105 and DIN 19217. However, the following additional factors come into play
for custody transfer procedures.
14.1 Programming the transmitter
If the device is to be verified at a later time, the settings in the following table should be used:
Settings Definable options Required for custody transfer
Binary output 1 • Pulse
• Frequency • Pulse
Binary output 2 • 90°
• Status • 90°
Binary input • Clearing errors
• Resetting totals
• Zero point
• Clearing errors
Status
Active state • “active” ON
• “active” OFF
• “active” OFF
Status output • Forward flow
• Reverse flow
• Limiting values
• Alarm
• Alarm
Counter • Units for mass flow rate
• Units for volume flow rate
• Units for mass flow rate
Pulse units • Units for mass flow rate
• Units for volume flow rate
• Units for mass flow rate
14.2 Binary input (resetter)
A pushbutton is connected to the binary input. To switch the counter display to a higher level of accuracy,
hold this pushbutton down for less than 3 seconds and then release it. After about 1 minute, the display
will automatically revert to the standard status. For better readability, the count display is “frozen” during
this process.
To delete an error message and start the display test sequence, hold the pushbutton down for at least 5
seconds. During the display test, all digits (0 to 9) will be displayed at each of the 16 positions on each
line of the display. This allows for detection of any defect in, damage to, or tampering with the display.
.
14.3 Self-test error
When the device is in Custody transfer mode, a self-test error message will remain on the display until it
is cleared by pressing the external resetter pushbutton.
For further information regarding error messages, see Section 15 CT transmitter error messages.
CMB & CT OPERATING MANUAL
Part No 06EN003384 rev. 1.6 Page 97 of 106