Section 9. Maintenance — Details
supplies approximately 3.6 Vdc. Replace the battery when voltage is
approximately 2.7 Vdc.
• When the lithium battery is removed (or is allowed to become depleted
below 2.7 Vdc and CR800 primary power is removed), the CRBasic
program and most settings are maintained, but the following are lost:
o Run-now and run-on power-up settings.
o Routing and communication logs (relearned without user
intervention).
o Time. Clock will need resetting when the battery is replaced.
o Final-memory data tables.
A replacement lithium battery can be purchased from Campbell Scientific or
another supplier. Table Internal Lithium Battery Specifications
(p. 458) lists battery
part numbers and key specifications.
Internal Lithium Battery Specifications
Manufacturer Tadiran
Tadiran Model Number TL-5902/S
Campbell Scientific, Inc. pn 13519
Voltage 3.6 V
Capacity 1.2 Ah
Self-discharge rate 1%/year @ 20 °C
Operating temperature range –55 to 85 °C
When reassembling the module to the wiring panel, check that the module is fully
seated or connected to the wiring panel by firmly pressing them together by hand.
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