Campbell Scientific TE525-LC Precipitation Sensor for MetData1 - Manual (Page 3)

1
TE525-LC TIPPING BUCKET RAIN GAGE
FOR METDATA1
1. FUNCTION
The TE525 is a smaller adaptation of the
standard Weather Bureau tipping bucket rain
gage. It measures rainfall at rates up to 2 in.
per hour with an accuracy of
± 1%. Output is a
switch closure for each bucket tip. A tip occurs
with each 0.01 inch of rainfall. The metric
TE525, available on special request, tips with
each 0.1 millimeter of rainfall.
2. SPECIFICATIONS
Range of Indication:
Infinite in increments of 0.01 in. (least
count) of rainfall. (Metric version: in
increments of 0.1 mm.)
Accuracy:
1.0% at 2 inch/hr. or less.
Signal Output:
Momentary switch closure activated by
tipping bucket mechanism. Switch closure
is approximately 135 ms.
Calibration/Cleaning Frequency:
Sensor is factory calibrated and should not
require field calibration. Debris filters, funnel
orifices, and bucket reservoirs should be
kept clean. Section 4 describes field
calibration check and factory recalibration.
Environmental Limits:
Temperature: 0
o
to +50
o
C
Humidity: 0 to 100%
Physical Data:
Diameter: 6.25 in. overall
Height: 9.5 in. (metric version 12 in.)
Weight: 2.5 pounds
Receiving Orifice: Gold anodized spun
aluminum knife edge collector ring and
funnel assembly.
Ring Diameter: 6.064 in. (metric version
9.664 in.)
Resolution: 0.01 in. (metric version 0.1 mm)
Calibration: 16.00 fluid oz. (100 bucket tips)
Mounting: Side bracket with clamps for
pole or mast mounting
Material: Aluminum
Cable: 2-conductor, shielded cable, 25 ft.
standard length.
NOTE: The black outer jacket of the cable
is Santoprene
®
rubber. This compound was
chosen for its resistance to temperature
extremes, moisture, and UV degradation.
However, this jacket will support
combustion in air. It is rated as slow
burning when tested according to U.L. 94
H.B. and will pass FMVSS302. Local fire
codes may preclude its use inside buildings.
FIGURE 1. TE525 Tipping Bucket Rain Gage