Backup Battery; Automatic Self-Tests; 15.10 Status Alarms - Emerson Micro Motion 3711 Configuration And Use Manual

Maintenance and Troubleshooting
15.8

Backup battery

The Model 3711 contains a backup battery that provides backup power to the clock and to SRAM.
Under normal conditions, the backup battery has a functional life of five years or more.
This battery can be replaced in the field. Micro Motion recommends that the battery be replaced every
five years, or after any extended period of power-down or storage. If the backup battery power is too
low, any power-down will result in loss of all configuration data, history, event and alarm logs, custom
displays, and FSTs. Replacement batteries are available from Micro Motion.
Replacing the battery also results in loss of all configuration data, history, event and alarm logs,
custom displays, and FSTs. Ensure that all data is saved to a file before replacing the battery.
15.9

Automatic self-tests

The Model 3711 performs the following self-tests on a periodic basis:
• Software watchdog
• Sensor operation
The software watchdog is controlled by the central processor unit (CPU). The CPU automatically
arms the watchdog timer every second. If a period of 9 seconds elapses during which the watchdog
timer is not armed, the watchdog timer forces the Model 3711 to perform a warm start, and an event is
logged.

15.10 Status alarms

To view status alarm codes, click
status alarms and possible remedies is provided in Table 15-1.
Table 15-1 Status alarms and remedies
Alarm
code Message
A001 EEPROM Checksum
Error (CP)
A002 RAM Error (CP)
A003 Sensor Failure
A004 Temperature Sensor
Failure
174
Meter > Core Interface
Possible remedy
Cycle power to the meter.
The meter might need service. Contact Micro Motion. See Section 1.8.
Cycle power to the meter.
The meter might need service. Contact Micro Motion. See Section 1.8.
Check the test points. See Section 15.16.
Check the sensor pins. See Section 15.18.
Check wiring to sensor. See Section 15.15.2.
Check for slug flow. See Section 15.12.
Check sensor tubes.
Check the test points. See Section 15.16.
Check the sensor RTD reading(s). See Section 15.18.
Check wiring to sensor. See Section 15.15.2.
Verify meter characterization. See Section 15.13.
Verify that process temperature is within range of sensor.
Contact Micro Motion. See Section 1.8.
and open the Diagnostics panel. A list of
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Micro Motion Model 3711 Gas Flow Computers