ARG100 Tipping Bucket Raingauge
4
3.2 Wiring to a Control Port
Dataloggers listed in Table 3-2 have the capability of counting switch closures on
some of their control ports. When a control port is used, the return from the rain
gauge switch must be connected to +5 volts on the datalogger.
Table 3-2. Wiring for Control Port Input
Colour
Description
CR800
CR1000
CR3000
CR500
CR510
CR10(X)
CR23X
Black Signal
Control
Port
C2/P3 Control
Port
Control
Port
Clear Signal
Return
5 V
5 V
5 V
5 V
Yellow Shield
The CR10 does not support the use of control port inputs with the Pulse Count
instruction.
4. Datalogger Programming
This section is for users who write their own programs. A
datalogger program to measure this sensor can be generated using
Campbell Scientific’s Short Cut Program Builder software. You do
not need to read this section to use Short Cut.
Precipitation is measured using a Pulse Count with a switch closure configuration
code. The multiplier used in the Pulse Count instruction determines the units in
which rainfall is reported (see Table 4-1).
Table 4-1. Multipliers
Rain Gauge
1 mm
ARG100 0.2
4.1 Pulse Channel Example Programs
The following example programs use a pulse channel to read the output from the
precipitation gauge. The CR1000 example will also work with the CR800,
CR850, CR3000, and CR5000. CR9000(X) programming is similar to the
CR1000 except it has an additional parameter in the PulseCount instruction to
specify the pulse module’s slot.
The CR10X program will also work with the CR500, CR510, CR10, 21X or
CR23X. CR7 programming is similar to the CR10X but has an additional
parameter in the PulseCount instruction to specify the slot that the Pulse Card is
in.
NOTE
