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170 Micro Motion
®
Series 3000 MVD Transmitters and Controllers
Operation Mode – Custody Transfer
19.6 Clearing a security breach
The method used to clear a security breach depends on the cause of the breach. See Table 19-3.
Note: Clearing the security breach on the Series 3000 device does not establish legal security (see
Section 19.2). To establish legal security, an authorized installation of the weights and measures seal
must be performed (see Section 14.7).
19.7 Reconfiguring the Series 3000 device
If you need to reconfigure the Series 3000 device:
1. Break the weights and measures seal.
2. Set the security switch to OFF (see Section 14.6).
3. Perform required configuration changes.
4. Set the security switch to ON (see Section 14.6).
5. If desired, acknowledge the security breach alarm (see Section 22.6). This step is not required;
the Series 3000 device will operate normally with an unacknowledged alarm.
6. Perform an authorized installation of the weights and measures seal (see Section 14.7).
19.8 Audit trail
The audit trail feature is used to track any changes made to Series 3000 parameters while the device is
unsecured.
The audit trail is organized into events. The Series 3000 device assigns a number to each event, and
stores the events in numerical order. An event includes all parameter changes made between the time
secure mode is exited and the time secure mode is reentered. For example:
• Secure mode is exited, no parameter changes are made, and secure mode is entered – no event
is logged in the audit trail.
• Secure mode is exited, one parameter change is made, and secure mode is entered – one event
is logged in the audit trail.
• Secure mode is exited, several parameter changes are made on one day, and several more are
made on the following day, then secure mode is entered – one event is logged in the audit trail.
The audit trail is accessed from the Maintenance menu. See Figure 19-3.
Table 19-3 Security breach causes and clearing methods
Cause Clearing method
Security switch set to OFF Set security switch to ON.
Core processor replaced, or disconnected and reconnected • Set security switch to OFF and back to ON.
• If A009 and A026 alarms are present on Model 3300
or Model 3500 panel-mount devices, see
Section 22.9.