TB4, TB4MM, CS700, and CS700H Tipping Bucket Rain Gages
10
examples for Edlog data loggers are provided at
7.2.1 PulseCount Instruction
The tipping buckets use a reed switch for measuring precipitation. The
PulseCount()
CRBasic instruction measures the reed switch.
PulseCount
(Dest,Reps,PChan,PConfig,POption,Mult,Offset)
•
Choose Switch Closure for the
PConfig
parameter. For the CR6 and
CR1000X, choose Switch Closure with pull up.
•
The
Multiplier
parameter determines the units in which rainfall is
reported. For the TB4, CS700, and CS700H, a multiplier of 0.01
converts the output to inches and a multiplier of 0.254 converts the
output to millimeters. For the TB4MM, a multiplier of 0.2 converts
the output to millimeters and a multiplier of 0.008 converts it to
inches.
7.2.2 SDI12Recorder Instruction
When measuring a CS700H, the CRBasic program can include the
SDI12Recorder()
instruction to retrieve real-time status information stored in
the CS700H microprocessor.
SDI12Recorder
Dest, SDIPort, SDIAddress, "SDICommand",
Multiplier, Offset, FillNAN, WaitonTimeout)
The
Destination
parameter must be an array of length 9.
FillNAN
and
WaitonTimeout
are optional parameters (refer to
CRBasic Help
for more
information). Appendix
(p. C-1)
, provides
information about the SDI-12 commands and other operational details for the
CS700H.
The CS700H will only communicate over SDI-12 when both
its sensor cable and power cable are connected (TABLE
).
7.3 Siting
Mount the rain gage in a relatively level location representative of the
surrounding area. Ensure that the orifice is horizontal, at least 1 m above the
ground, and higher than the average snow depth.
Place the rain gage away from objects that obstruct the wind. The distance
should be 2- to 4-times the height of the obstruction.
7.4 Mounting
The tipping buckets have three equally-spaced feet for mounting them on a flat
surface. Each foot includes a hole that fits a 3/8-inch (M8) bolt. The three holes
form a 234 mm (9.21 in) diameter bolt circle.
CAUTION
