Tools and Materials Needed
Page 3
T
OOLS
AND
M
ATERIALS
N
EEDED
You may need some of the following tools and materials in order to install the
rain collector.
✦
Drill with 3/32" (2 mm) drill bit
✦
Medium Phillips Screwdriver
✦
3/16" (or 5 mm) Wrench
✦
Cable Clips or Weather-Resistant Cable Ties with screw holes or other means for
mounting
✦
Bubble Level (standard versions only)
R
AINFALL
C
ALIBRATION
N
UMBER
Each station uses a rainfall calibration number (CAL) to determine how much
water each bucket tip (i.e., pulse) represents.
Calibrated Rainfall= Number of pulses x (1/CAL)
The default rainfall CAL of 100 works for the 0.01" rain collector. If you have a
0.01" rain collector you do not need to adjust CAL at all.
If you have a 0.2 mm rain collector, first adjust the console to display rainfall in
millimeters and then change CAL to 0005. (To change CAL, press and hold the
RAIN button until CAL appears on the display. Consult the station manual, if
necessary, for further instructions.) Be aware that the console will revert to its
default calibration (i.e., inches) if it loses power.
Note:
Make sure you display rainfall in the appropriate units of measure
before
changing CAL; other-
wise you will be setting the wrong calibration number. If, by mistake, you change CAL before
switching to the appropriate units, you can rectify the error by switching to the appropriate units
and then entering the appropriate CAL (for millimeters, 0005; for inches, 0100).
Once the console is calibrated for 0.01" (default) or 0.2 mm, you can switch the
display units as often as you like; the console accurately converts rainfall
amounts regardless of the type of rain collector you use.
Caution to Pre-1994 Station Owners
If you purchased a Monitor or Wizard station prior to 1994, it may be pre-
calibrated for an earlier model rain collector. See “Calibration of Older
Model Weather Stations” on page 14 for instructions.
