Campbell Scientific ET107 Evapotranspiration Monitoring Station - Manual (Page 76)

ET107 Weather Station
2 years
• Replace 034B-ET’s vane potentiometer if needed (call for part number and
price). To send the sensor to Campbell Scientific for potentiometer
replacement call for Return Material Authorization number or contact
Campbell Scientific for potentiometer cost to replace potentiometer in the
field.
• Replace enclosure gasket if necessary. Enclosure can be sent in to
Campbell Scientific for gasket replacement – call for Return Material
Authorization number or contact Campbell Scientific for gasket cost to
replace gasket in the field.
3 years
• Send the solar radiation sensor (pyranometer) to Campbell Scientific for
calibration. Call Campbell Scientific for a Return Material Authorization
number. Sensor cannot be calibrated in the field. (Some users recommend
calibrating this sensor on a yearly basis.)
4-5 years
• Check sensor cables (as well as all other cables) for cracking,
deterioration, proper routing, and strain relief. Replace as required.
• Check enclosure relative humidity sensor (pn 10070). To check this
sensor, take the lid off the enclosure during routine desiccant replacement
and leave it off for 5 to 10 minutes before putting in new desiccant. While
the lid is off the enclosure, compare the internal enclosure humidity to the
air humidity. Replace if > 10% off.
4.1.4.1 Procedure for Removing RH Chip
1. Unscrew the protective cap (see FIGURE 4-1).
2. Hold the plastic sides of the RH chip and unplug it.
To prevent scratching, avoid touching the silver chip, and
handle the RH chip with care.
3. Rinse off the RH chip with distilled water or dispose of the old RH chip.
4. Hold the sides of the rinsed or new chip and plug it in.
5. Screw on the protective cap.
4.1.5 CR1000M Module
The CR1000M Module contains a lithium battery that operates the clock and
SRAM when the module is not powered. The CR1000M does not draw power
from the lithium battery while it is powered by a 12 Vdc supply. In an ET107
stored at room temperature, the lithium battery should last approximately 10
years (less at temperature extremes). Where the ET107 is powered most or all
of the time, the lithium cell should last much longer.
CAUTION
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