Campbell CR800 Series, Operator'S Manual

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9. Maintenance — Details
Related Topics:
• Maintenance — Overview
(p. 85)
•
Maintenance — Details
(p. 457)
•
Protect the CR800 from humidity and moisture.
• Replace the internal lithium battery periodically.
• Send to Campbell Scientific for factory calibration every three years.
9.1 Protection from Moisture — Details
Protection from Moisture — Overview
(p. 85)
Protection from Moisture — Details
(p. 102)
Protection from Moisture — Products
(p. 580)
When humidity levels reach the dew point, condensation occurs and damage to
CR800 electronics can result. Effective humidity control is the responsibility of
the user. The CR800 module is protected by a packet of silica gel desiccant,
which is installed at the factory. This packet is replaced whenever the CR800 is
repaired at Campbell Scientific. The module should not normally be opened
except to replace the internal lithium battery.
Adequate desiccant should be placed in the instrumentation enclosure to provide
added protection.
9.2 Internal Battery — Details
CAUTION
Fire, explosion, and severe-burn hazard. Misuse or improper
installation of the internal lithium battery can cause severe injury. Do not
recharge, disassemble, heat above 100 °C (212 °F), solder directly to the
cell, incinerate, or expose contents to water. Dispose of spent lithium
batteries properly.
The CR800 contains a lithium battery that operates the clock and SRAM when the
CR800 is not powered. The CR800 does not draw power from the lithium battery
while it is fully powered by a
power supply
(p. 83).
In a CR800 stored at room
temperature, the lithium battery should last approximately three years (less at
temperature extremes). In installations where the CR800 remains powered, the
lithium cell should last much longer.
While powered from an external source, the CR800 measures the voltage of the
lithium battery ever 24 hours. This voltage is displayed in the Status table (see
Info Tables and Settings
(p. 527))
in the Lithium Battery field. A new battery