User`s manual

Functional Description 31

cPCI-3920

Battery

The cPCI-3920 is provided with a 3.0 V “coin cell” lithium battery

for the RTC. To replace the battery, proceed as follows:

X Turn off power

X Remove the battery

X Place the new battery in the socket.

X Make sure that you insert the battery the right way round.

The plus pole must be on the top!

The lithium battery must be replaced with an identical battery

or a battery type recommended by the manufacturer. Suitable

batteries include the Varta CR2025 and Panasonic BR2020.

NOTE:

The user must be aware that the battery’s operational tempera-

ture range is less than that of the cPCI-3920’s storage temper-

ature range. For exact range information, refer to the battery

manufacturer’s specifications.

NOTE:

Care must be taken to ensure that the battery is correctly

replaced.The battery should be replaced only with an iden-

tical or equivalent type recommended by the manufac-

turer.Dispose of used batteries according to the manufacturer’s

instructions.The typical life expectancy of a 225 mAh battery

(Varta CR2032) is 4-5 years with an average on-time of 8

hours per working day at an operating temperature of 30°C.

However, this typical value varies considerably because the life

expectancy is dependent on the operating temperature and the

standby time (shutdown time) of the system in which it oper-

ates.To ensure that the lifetime of the battery has not been

exceeded, it is recommended to exchange the battery after 3-4

years.