Campbell Scientific 380, 385, 380M, 385M Met One Rain Gages - Manual (Page 19)

Met One Rain Gage Models 380 and 385
3. Pour the appropriate amount of water (see Table 7-1) into the inner funnel
(i.e. 18.52 ml for 0.01 inches of rain / tip):
Conversion Factors:
Tip to in
3 : 113.04 in 2 (catch orifice area) x increment in inches.
in 3 to ml: multiply by 16.3881.
ml to ounces: multiply by 0.03382.
4. Turn the cup adjustment screw, opposite the full bucket, up until the
bucket assembly tips. Tighten the lock nut.
5. Repeat steps 3 and 4 for the opposite bucket.
6. Repeat steps 1-5 to ensure proper calibration.
7. Reinstall the housing assembly and tighten the three screws.
TABLE 7-1. Volume of Water
for Recalibration
Tip Increment in 3 ml ounces
0.01 in 1.130 18.52 0.63
7.2 Factory Recalibration
Factory recalibration is available from either Campbell Scientific Incorporated
or Met One Instruments. Please call and request an RMA number prior to
returning any equipment to Campbell Scientific Incorporated
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