CS700H-LHeated Rain Gage

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1. What is the output range of the CS700-L or the CS700H-L?

   这些雨量规不一定生成一个伏特age 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.

2. Is the CS700-L, CS700H-L, or 52202-L connected to a control input or a pulse channel?

   These rain gages can be connected to either.

   • When a control port is used, one lead goes to the 5 V port to provide current, and the other lead goes to a control port to detect the current.
   • When a pulse channel is used, one lead goes to the pulse port, and the other lead terminates on a ground terminal.

3. If a data logger is not registering any tips, what can be done?

   The following are some suggestions to try:

   1. Check that there is a solid connection to the reed switch. The screws should be tight, and the wires should have a solid connection to the screws.
   2. Try switching the connection from the current reed switch being used to the secondary reed switch connection.
   3. Check that the cable is connected to the correct input on the data logger. Take the two wires on the other end of the cable (the sensor side) and touch them together. The data logger should register a tip. If the tip registers, the issue is with the reed switch. Replace the reed switch.
   4. If the data logger still doesn't register a tip, try using a different cable.

4. What are the steps to perform a field calibration check on a TB4-L, a TB4MM-L, or a CS700-L?

   1. Remove the housing assembly from the base by removing the three screws and lifting upward on the housing.
   2. 检查验证的泡沫水平rain gage is level.
   3. Pour water through the inner funnel to wet the two bucket surfaces. Using a graduated cylinder, slowly pour 314 cc (19.16 in³) of water, over a 15 minute period, into the collection funnel. This volume of water is equal to 0.39 inches of rainfall (10 mm).
   4. After the water has passed through the rain gage, the tipping bucket should have tipped 39 times for the TB4-L or CS700-L, or 50 times for the TB4MM-L.
   5. If the rain gage fails to record the correct number of tips, return the unit to Campbell Scientific for recalibration.
5. What can cause a data logger to not receive correct tipping data?

   如果数据没有被记录correctly, there are two likely causes:

   • The reed switch has failed.
   • There is a faulty connection from the rain gage to the data logger, typically caused by a broken conductor or corroded wiring.
6. What are the indicators that a tipping bucket rain gage has a faulty reed switch?

   Not registering any tips, missing tips, or double tips.

7. What are the indicators that a tipping bucket rain gage is out of calibration?

   Not enough tips or too many tips.

8. What type of wind screen can be used for a tipping bucket rain gage?

   The260-953Alter-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.

9. What are the most common errors with a tipping bucket rain gage?

   The most common errors are either that the rain gage appears to have drifted out of calibration or that the tips are not being correctly recorded by the data logger.

10. How many heating elements does the CS700H-L have?

    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.