Notes On The Use Of Batteries; Battery Life; Ec 912 And Ec 922 - RMG EC 900 Operating Instructions Manual

MAINTENANCE
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Notes on the use of batteries

Lithium batteries retain their voltage until they are almost completely discharged so that the volt-
age cannot be monitored with an appropriate indicator until the next battery change is necessary.
You can enter the months until the next battery change is necessary under "Time values /
Batt change" in the "OPER." book. On delivery, the devices are programmed with 81 months; this is
the mandatory interval for follow-up verification in Germany. The battery change indicator has been
designed as a down counter; apart from the operating hours, also the loading of the device is taken
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into account for calculation. When 6 months are over, a warning which serves as a reminder to
change the battery will be generated each month. After the battery has been changed, the warning
will be cancelled and can be deleted.

Battery life

EC 911:
The battery life for the EC 911 is designed with a minimum period of six years under the following
conditions:
1-channel volume sensor with reed contact and a maximum of 0.5 Hz
Display ON time of 5 minutes maximum per week
Data transfer time of 5 minutes maximum per week
At an ambient temperature of the corrector of 20° Celsius
The battery life is also reduced when the device is continuously operated at temperatures below
zero degrees. At an ambient temperature of -20°C, the battery capacity is sufficient for the EC 911
in the operating mode described above for a maximum of 3 years.
When using an encoder as a volume sensor, the battery life is reduced to a maximum of 5 years
depending on the encoder type.

EC 912 and EC 922

If the battery is needed as a pure emergency battery only those contacts should be connected
which are really needed. The battery life is, depending on the operating mode and the connected
signals, at least 28 days.
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