Specifications

Section 4. Maintenance, Troubleshooting, and Schematics
4.1.5 CR1000M Module
The CR1000M Module contains a lithium battery that operates the clock and
SRAM when the module is not powered. The CR1000M does not draw power
from the lithium battery while it is powered by a 12 VDC supply. In an ET107
stored at room temperature, the lithium battery should last approximately 10
years (less at temperature extremes). Where the ET107 is powered most or all
of the time, the lithium cell should last much longer.
While powered from an external source, the module measures the voltage of
the lithium battery daily. This voltage is displayed in the status table. A new
battery will have approximately 3.6 volts. The CR1000 Status Table has a
“Lithium Battery” field. This field shows lithium battery voltage.
Send the ET107 enclosure to Campbell Scientific to have Campbell Scientific
replace the battery when voltage is approximately 2.7 V. If the lithium cell is
removed or allowed to discharge below the safe level, the ET107 will still
operate correctly while powered. Without the lithium battery, the clock will
reset and data will be lost when power is removed.
Campbell Scientific recommends factory replacement of
the lithium battery. Misuse of the lithium battery or
installing it improperly can cause severe injury. It is a fire,
explosion, and severe burn hazard! Do not recharge,
disassemble, heat above 100°C (212°F), solder directly to
the cell, incinerate, nor expose contents to water. Lithium
batteries need to be disposed of properly.
CAUTION
The lithium battery contained inside of the ET107’s canister is Campbell
Scientific part number 13519. Table 4.1-1 lists the specifications of the
battery.
TABLE 4.1-1. CR1000 Lithium Battery
Specifications
Manufacturer Tadiran
Model TL-59025 (3.6 V)
Capacity 1.2 Ah
Self-discharge rate 1%/year @ 20°C
Operating temperature range -55°C to 85°C
4-5