RainGaugeCalP

Description

Introduction to The Tipping Bucket Rain Gauge

Tipping Bucket Rain Gauge calibration given volume of water in ml, number of tips and diameter of funnel in mm.


To calibrate fill a container with water.
Weigh it in grams.
Add water very slowly to the raingauge funnel.
Count the number of tips.
Weigh the container again.
Subtract the weights = water volume used in ml.
The reference above has more detailed information.

Water volume used in ml ENTER
Number of tips ENTER
Diameter of funnel in mm GSB A

mm rain per tip is displayed.

Example:
Water volume used 98 ml
Number of tips 25
Diameter of funnel 100 mm
mm rain per tip = 0.50 mm

9 8 ENTER
2 5 ENTER
1 0 0 GSB A
mm rain per tip = 0.50 mm

Program Resources

Labels

Name Description
 A Run Rain Gauge calibration

Storage Registers

Name Description
 1 Area of funnel in mm2
 2 Number of tips
 3 Total volume of water used - ml
 4 Volume divided by tips - ml
 5 mm per tip

Program

Line Display Key Sequence
000
001 42,21,11 f LBL A
002 2 2
003 10 ÷
004 43 11 g
005 43 26 g π
006 20 ×
007 44 1 STO 1
008 33 R⬇
009 44 2 STO 2
010 33 R⬇
011 44 3 STO 3
012 45 2 RCL 2
013 10 ÷
014 44 4 STO 4
015 45 1 RCL 1
016 10 ÷
017 26 EEX
018 3 3
019 20 ×
020 44 5 STO 5