FEATURES
• Built in microprocessor automatically corrects for errors caused by sensitivity of the tipping bucket mechanism to varying rainfall rates
• Removable stainless steel funnel screen.
• Rustproof, powder painted aluminum enclosure and cast base
• All internal parts anodized aluminum or stainless steel
• Magnetic reed bucket tip sensor
• Precision bucket bearings
• Side windows allow inspection of the mechanism without removing cover
• Adjustable feet with internal bulls-eye level
• Works with any data logger with a SDI-12 port
• SDI-12 digital interface supports multiple sensors on a simple three wire cable
APPLICATIONS
• Accurately measure rainfall
• Monitor storm water run off
• Meteorology
SPECIFICATIONS
• Sensor: Tipping bucket with magnetic reed switch sensor.
• Accuracy/ Rainfall Rate: Built-in microprocessor measures the time between bucket tips (rainfall rate) and uses this data to compute the bucket volume per tip at the current rainfall rate. A built-in math polynomial provides corrected bucket volume for rainfall rates between 0
and 25 in/hour.
• Resolution: 0.01 in. (0.25mm)
• Rain fall rate: 0 to 25 in./hr. (calibrated) (0 to 635mm)
• SDI-12 Output:
Baud Rate: 1200
Protocol: SDI-12, 7-bit even parity, 1 stop bit
Output Voltage Levels:
Minimum high level: 3.5 volts
Maximum low level: 0.8 volts
Maximum cable length: 250 ft. (76m)
SDI-12 Output Data Parameters:
1 – Accumulated rainfall since last measurement
2 – Raw bucket count since last measurement
3 – Total accumulation
4 – Total daily accumulation (today)
5 – Total daily accumulation (yesterday)
Automatic daily accumulation using built-in crystal controlled time of day clock.
• Power Requirements
Voltage Input: 10.0 to 16.0 Volts DC
Current
Standby: 150FA typical
Raining: 3.7mA for 60 seconds
Communicating: 9.8mA
• Connectors: SDI-12 Output: 4-position spring clamp terminal block (WAGO)
• Mechanical
Aperture: 8 inch diameter funnel (203mm)
Diameter: 8 inches
Height: 12 inches (305mm)
Weight: 8 pounds (3.6kg)
• Housing: Extruded aluminum tube with 2 in. diameter side windows. Cast aluminum base with drain tubes in the bottom. Anodized aluminum internal parts. Stainless steel screws and fasteners. Powder painted base, funneland housing.
• Mounting: 3-stainless leveling screws with adjustable aluminum feet. Internal “bulls-eye” level.
• Environmental (electronics): Operating Temperature: -30E to +60EC
Storage Temperature: -50E to +70EC
• Environmental (mechanical): Operating Temperature: -0E to +60EC
Ordering Information: H-340SDI
h340-sdi-manual