Campbell UT10, Instruction Manual

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UT10 Universal Tower
53
A station log should be maintained for each weather station that includes serial
numbers, dates that the site was visited, and maintenance that was performed.
9.1.1 Instrumentation Maintenance
The instrumentation requires a minimum of routine maintenance. A few
preventative maintenance steps will optimize battery life and decrease the
chances of datalogger failure.
9.1.2 Batteries
The CRBasic battery instruction can be used to measure the battery voltage. By
recording battery voltage, the user can determine how long a fresh set of
batteries will last (see the Installation Section of the datalogger Operator’s
Manual for cold temperature effects on alkaline batteries).
Short Cut
automatically program the weather station to measure battery voltage.
When alkaline batteries are used, the battery voltage should not be allowed to
drop below 9.6 Vdc before replacement. Where CR10 or 21X dataloggers are
used in the instrumentation, an external battery must be used to maintain power
to the datalogger when changing batteries, otherwise the clock, program, and
data will be lost (refer to the Installation Section of the datalogger’s Operator’s
Manual for details). When not in use, remove the eight cells to eliminate
potential corrosion of the contact points, and store in a cool dry place.
Rechargeable power supplies should be connected to an AC transformer or
unregulated solar panel at all times. The charge indicating diode should be
“ON” when voltage to the charging circuitry is present. Be aware of battery
voltage that consistently decreases over time, which indicates a failure in the
charging circuitry.
9.1.3 Desiccant
In standard weather stations, a humidity indicator card is provided with the
enclosure. A small RH sensor (CS210) can be purchased separately to record
the RH inside the enclosure. Change the desiccant when either the card or the
sensor read about 35% RH.
Desiccant may be ordered through Campbell Scientific (pn 6714).
Desiccant packs inside of the dataloggers do not require replacement under
normal conditions.
9.1.4 Sensor Maintenance
Sensor maintenance should be performed at regular intervals, depending on the
desired accuracy and the conditions of use. A suggested maintenance schedule is
outlined below.
1 week
•
Check the pyranometer for level and contamination. Gently clean, if
needed.
•
Visually inspect the wind sensors and radiation shield.