10 maintenance, 1 desiccant – Campbell Scientific CR23X Micrologger User Manual
Page 237
SECTION 14. INSTALLATION AND MAINTENANCE
14-11
FIGURE 14.9-1. Relay Driver Circuit with Relay
FIGURE 14.9-2. Power Switching without Relay
14.10 MAINTENANCE
The CR23X power supplies require a minimum
of routine maintenance.
When not in use, the rechargeable supply
should be stored in a cool, dry environment with
the AC charging circuit activated.
The alkaline supply should not drop below
11.0 V before replacement. When not in use,
remove the ten cells to eliminate potential
corrosion of contact points and store in a cool
dry place.
14.10.1 DESICCANT
The CR23X is shipped with desiccant to reduce
humidity. Desiccant should be changed
periodically. To prevent corrosion in
uncontrolled or condensing atmospheres, the
CR23X must be placed inside a weather tight
instrument enclosure with desiccant. If only
alkaline batteries are used, the enclosure may
be sealed to inhibit vapor transfer into the
enclosure. Do not seal the enclosure if lead
acid batteries are present. Hydrogen gas
generated by the batteries may build up to an
explosive concentration.
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