Water Temperature Installation; Soil Temperature Installation - Campbell 108 Product Manual

Temperature probe

Hide thumbs Also See for 108:

Table of Contents

FIGURE 7-2. 108 and 41303-5A Radiation Shield on a tripod mast (left).

108 and RAD06 Radiation Shield on a CM200-Series Crossarm (right).

The 108 is held in the 41303-5A radiation shield by a mounting clamp at the bottom

(FIGURE 7-1

(p. 8) and

FIGURE 7-2

(p. 9) left). Loosen the mounting clamp screws, and insert the probe

through the clamp. Tighten the screws to secure the sensor, and route the sensor cable to the

instrument enclosure.

The 108 is held in the RAD06 radiation shield by inserting the sensor through the sensor gland at

the bottom of the shield

(FIGURE 7-2

(p. 9) right). Loosen the nut on the gland, and insert the

probe into the shield. Tighten the nut on the sensor gland using an adjustable wrench until the

sensor is securely held in place. Route the sensor cable to the instrument enclosure.

Secure the cable to the tripod or tower using cable ties.

7.4 Water temperature installation

108 probes can be submerged to 15 m (50 ft) or 21 psi. The 108 is not weighted, so a weighting

system should be added, or the probe secured to a submerged object such as a piling.

The 108 tends to measure the average temperature over its length, so burying the probe such

that the measurement tip is horizontal to the soil surface at the desired depth is usually preferred.

The maximum burial depth for soil that could become saturated with water is dictated by the

maximum water pressure allowed for the sensor, which is 21 psi.

One or two coils of cable should also be buried in a shallow installation. Burial of some cable

mitigates the effect of solar heating of the above ground cable on the temperature

measurement.

108 Temperature Probe 9

Table of Contents