Columbia Weather Systems, Inc.
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Plug the power cord into a convenient grounded outlet. (Foreign users may need to
remove the standard plug and replace it with one compatible with local require-
ments.)
Note: It is strongly recommended that you protect your unit from power line spikes
(caused by lightning or electrical discharge) by installing a good quality spike-surge
suppression device between the Capricorn II Plus and the power source. This
becomes critical if the installation occurs in areas which tend to experience frequent
electrical storms, such as the southeastern United States. More than 80% of repairs
performed on Capricorn II Plus units are caused by electrical storms.
Theoretically, there is no way to avoid the risk of damage entirely, but there has
never been a reported case of electrical damage by power line transients to a
Capricorn II Plus console that was protected by a good quality spike-surge suppres-
sor. A good spike-surge suppression device is relatively inexpensive damage insur-
ance and may be purchased from finer computer and electronics outlets, or from the
factory. If ordering from Columbia Wather Systems, Inc., specify Cat. No. 8350 (six
outlets) or 8351 (single outlet).
After waiting 30 seconds to give the microcomputer time to achieve normal operat-
ing condition, check to see that all displays light properly. When power is first ap-
plied, the display digits may not come on, or the values may be incorrect. This is
normal. If the display does not light up within 30 seconds unplug the unit, wait 15
seconds and plug it in again. The Capricorn II Plus should warm up at least one
hour to achieve the specified sensor and display accuracies. The temperatures
displayed should be around room temperature.
Disconnect the temperature wires from the console back panel (in preparation for
installing the temperature sensors). Do not disconnect the wind sensor wires at this
time.
After the computer has been operating for some time, the back panel will be warm
to the touch. This is normal and is an indication that Capricorn II Plus is operating
correctly. The instrument is designed so that heat will be released through the back
panel.
Insure that sufficient air circulation is available all around the console.
Backup battery
Attach an alkaline 9-volt battery (user supplied) to the “Keep-Alive” battery clip on
the back panel to insure continuous memory protection. See the Memory Protection
Feature section on page 40 for further details on this feature
Alarm Controlled Output
If Alarm Controlled Output is desired, a security-alarm contractor, a local electrician
or an electrical supplier should be contacted to supply an external 12-volt (or less)
relay. A qualified contractor should assist in connecting the relay to the control
system. (The alarm output relay contact is rated 100 mA maximum DC current, 12
volts.) See Figure 5.