Emerson Micro Motion 2500, Configuration And Use Manual

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Before switching to unsecured mode, ensure that you will be able to switch back to
secured mode. Because switching to unsecured mode requires breaking the physical seal,
switching back to secured mode may require a site visit from a certified Weights &
Measures inspector and reinstallation of the physical seal.
Ensure that the wiring is in place for a service port connection. You may need to break the
seal and remove the clamp.
Ensure that the RS-485 terminals are in service port mode. You may need to power-cycle
the transmitter.
Procedure
• To switch from secured mode to unsecured mode:
1. Run the switching utility.
2. Select the COM port to use for the connection.
3. Click Disable Custody Transfer.
• To switch from unsecured mode to secured mode:
1. Run the switching utility.
2. Select the COM port to use for the connection.
3. Click Enable Custody Transfer.
10.3 Clear Status Alarm A027: Security Breach
Status Alarm A027: Security Breach is posted if the transmitter is switched to unsecured
mode or if the transmitter detects that the core processor ID has changed.
1.
If the transmitter is in secured mode, switch to unsecured mode.
2. Take any required actions related to the cause of the security breach.
3. Switch to secured mode.
10.4 Replacing the core processor in a Weights &
Measures installation
In a Weights & Measures installation, replacing the core processor requires re-sealing the
transmitter.
When the transmitter is first secured, the core processor’s unique ID is registered with the
transmitter. If you replace the core processor with another core processor, the transmitter
will post Status Alarm A026: Sensor/Xmtr Communication Error. To clear this alarm, you
must switch the transmitter to unsecured mode and resecure it. This requires breaking the
physical seal and reinstalling it when the entire process is complete.
Other procedures may be required. Refer to the Weights & Measurements documentation
for your installation.
Operate the transmitter with the Weights & Measures application
Configuration and Use Manual 139