Campbell Scientific 380, 385, 380M, 385M Met One Rain Gages - Manual (Page 7)

Met One Rain Gage Models 380 and 385
The rain or snow gage should be placed away from objects that obstruct wind.
The minimum distance should be 2 times the height of the obstruction or more.
3.2 Mounting
The rain or snow gage is designed to mount on a flat surface. Three equally
spaced adjustable mounting legs are provided. The mounting legs are pre-
drilled for 1/4" bolts on a 9.66" diameter bolt circle. A mounting bracket is
available from Campbell Scientific (CM240) to install either the rain or snow
gage. The mounting bracket provides additional adjustment for leveling the
rain or snow gage. The CM240 base helps level the rain gage, ensuring a more
accurate measurement. The base may be attached to a CM300-Series
Mounting Pole or to a user-supplied 1.5 IPS (1.9” OD, unthreaded) pipe. The
pipe should be long enough to place the gage's orifice at a one-meter height.
The pole or pipe can be placed directly into a concrete foundation, attached to
a concrete foundation using J-bolts, or self-supporting with legs (see Figure 3-
2). A concrete pad is recommended. A typical snow gage installation is
illustrated in Figure 3-1.
Loosen the three screws and lift the housing assembly from the base. Adjust
the three slotted feet on the base of the rain gage and/or the three nuts on the
CM240 to level the gage.
Remove the rubber shipping band securing the stainless steel tipping bucket
assembly. Verify the bucket tips freely and that all the adjusting screws are
tight. Replace the housing assembly and tighten the three screws to secure the
housing to the base. Level the rain gage after mounting it.
3.3 Screen Removal
If snowfall is anticipated, remove the primary screen from funnel, as shown in
Figure 3-3.
Remember to replace primary screen after a snowfall event. NOTE
3