The CS700H, manufactured by HS Hyquest Solutions, is a high-end heated tipping bucket rain gage with an 8 in. orifice and a heavy duty cast aluminum base. It measures precipitation in 0.01 in. increments at temperatures down to -20°C. This heated rain gage is ideal for locations where intense rainfall events may occur, and it is used in environmental monitoring applications.Read More
The CS700H funnels precipitation into a bucket mechanism that tips when filled to its calibrated level. Each tip is marked by a dual reed switch closure that is recorded by a data logger pulse count channel. After measurement, the water drains through two orifices (accepts 12 mm tubing) in the base, allowing the measured water to be collected in a separate container.
The CS700H contains an internal siphon mechanism that causes precipitation to flow at a steady rate to the tipping bucket mechanism (regardless of intensity). The siphon allows the sensor to make accurate measurements over a range of 0 to 50 cm per hour.
The CS700H includes an internal snow sensor that is activated when the air temperature drops below 4°C. If the snow sensor detects snow in the catch area (funnel), the heating elements automatically turn on and keep the funnel temperature at +10°C. To conserve power, the heater goes into a wait mode when snow has not been detected for 18 minutes. The heating element is also automatically deactivated when the air temperature drops below -20°C.
|Sensor Type||Tipping bucket with siphon|
|Resolution||0.01 in. (0.254 mm)|
|Measurement Range||0 to 700 mm/h (0 to 27.6 in./h)|
|Humidity Range||0 to 100%|
|Cable Type||Two-conductor shielded|
|Operating Temperature Range||
|Total Current Consumption||
|Main Power Voltage Requirements||10 to 30 Vdc or 12 to 28 Vac|
|SDI-12 Power Voltage Requirements||9.6 to 16 Vdc|
|Drain Tube Size||Both filters accept 12 mm (0.47 in.) ID tubing.|
|Orifice Diameter||20 cm (7.9 in.)|
|Height||34.2 cm (13.5 in.)|
|Weight||3.3 kg (7.4 lb) with 7.62-m (25-ft) cable|
CS700H-AC Option Only
|-NOTE-||Additional specifications are provided in Phoenix Contact’s manual for the Quint-PS/1AC/24DC/10.|
|AC Input Voltage Range||85 to 264 Vac|
|Protective Circuitry||Transient Surge Protection Varistor|
|Integrated Input Fuse||6.3 A (slow blow, internal)|
|Normal Output Voltage||24 Vdc ±1%|
Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.
The CS700H has two power configuration options (either AC or DC). With the AC option, a Phoenix Contact Power Supply is shipped with the CS700H. With the DC option, the CS700H is connected to a user-supplied battery. This option is ideal for remote sites using wind or solar power to recharge the battery. Battery capacity requirements vary according to the application and site location.
The base of the gage is supported by three legs. A CM240 Leveling Base and Mount or a user-supplied baseplate with leveling capability is recommended. The CM240 may be attached to a CM300-series mounting pole, or to a user-supplied 1.5 IPS (1.9-inch outer diameter, unthreaded) pipe (see Ordering Information). A concrete pad is recommended.
Campbell Scientific offers the 260-953 Wind Screen to help minimize the affect of wind on the rain measurements. This wind screen consists of 32 leaves that hang freely and swing as the wind moves past them.
Number of FAQs related to CS700H-L: 12
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The CS700H-L has three heating elements to prevent the formation of icicles. Two of the heaters are on the base of the funnel, and one is on the base of the bucket. Because of the heating elements, this sensor requires a power supply of approximately 5 A. The SDI-12 interface of the sensor controls the heaters to come on only when needed.
These rain gages don’t necessarily generate a voltage range, but rather a pulse. Depending on how the rain gage is connected to the data logger, the gage can generate a sourcing current or a sinking current pulse.
These rain gages can be connected to either.
The following are some suggestions to try:
Not registering any tips, missing tips, or double tips.
If data is not being logged correctly, there are two likely causes:
Not enough tips or too many tips.
The 260-953 Alter-type rain gage wind screen consists of 32 heavy metal leaves that hang freely and swing as the wind moves past them. The swinging leaves act as a wind damper and help minimize the effect of wind on the rain measurements without adding additional turbulence.
When a rain gage is out of calibration, it is usually because of the buildup of dirt and grime on the internal surfaces of the tipping bucket mechanism. Cleaning the internal surfaces usually brings the rain gage back into calibration. It is also possible that a rain gage is out of calibration because it is no longer level.
To minimize the possible occurrence of calibration errors, perform routine cleaning and maintenance of the rain gage at least once every three months. The environmental conditions at a particular site may require a facility to perform cleaning, leveling, and maintenance on a much more frequent schedule.