Campbell Scientific CR1000 Measurement and Control System - Manual (Page 81)

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Section 7. Installation
7.1 Moisture Protection
When humidity tolerances are exceeded and condensation occurs, damage to
CR1000 electronics can result. Effective humidity control is the responsibility of
the user.
Internal CR1000 module moisture is controlled at the factory by sealing the
module with a packet of silica gel inside. The desiccant is replaced whenever the
CR1000 is repaired at Campbell Scientific. The module should not be opened by
the user except to replace the lithium coin cell providing back up power to the
clock and SRAM. Repeated disassembly of the CR1000 will degrade the seal,
leading to potential moisture problems.
Adequate desiccant should be placed in the instrumentation enclosure to prevent
corrosion on the CR1000 wiring panel.
7.2 Temperature Range
The CR1000 is designed to operate reliably from -25 to +50°C (-40°C to +85°C,
optional) in non-condensing environments.
7.3 Enclosures
Illustrated in figure Enclosure
(p. 82)
is a typical use of an enclosure, which is
available from Campbell Scientific. This style of enclosure is classified as
NEMA 4X (watertight, dust-tight, corrosion-resistant, indoor and outdoor use).
Enclosures have back plates to which are mounted the CR1000 datalogger and
associated peripherals. Back plates are perforated on one-inch centers with a grid
of square holes that are lined as needed with anchoring nylon inserts. The
CR1000 base has mounting holes (some datalogger models may be shipped with
rubber inserts in these holes) through which small screws are inserted into the
nylon achors. Remove rubber inserts, if any, to access the mounting holes.
Screws and nylon anchors are included in an enclosure supply kit included with
the enclosure. Refer to Enclosures
(p. 566)
for a list of available enclosures.