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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 datalogger.
What are the indicators that a tipping bucket rain gage is out of calibration?
Not enough tips or too many tips.
What can cause a tipping bucket rain gage to be out of calibration?
When a rain gage is out of calibration, it is usually due to 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.
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 and maintenance on a much more frequent schedule.
What are the steps to perform a field calibration check on a TB4-L, a TB4MM-L, or CS700-L?
What can cause a datalogger not to receive correct tipping data?
If data is not being logged correctly, there are two likely causes: either the reed switch has failed, or there is a faulty connection from the rain gage to the datalogger.
What are the indicators that a TB4-L, a TB4MM-L, or CS700-L has a faulty reed switch?
Not registering any tips, missing tips, or double tips.
If a datalogger isn't registering any tips, what can be done?
The following are some suggestions to try:
What are the different cable length choices available for Campbell Scientific sensors?
Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:
• An –LC model has a user-specified cable length for connection to an ET107, CS110, or retired Metdata1.
• An –LQ model has a user-specified cable length for connection to a RAWS-P weather station.
If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field on the product’s Ordering tab. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.
If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.
• –ET models terminate with the connector for an ET107 weather station.
• –ETM models terminate with the connector for an ET107 weather station, but they also include a special system mounting, which is often convenient when purchasing a replacement part.
• –QD models terminate with the connector for a RAWS-F Quick Deployment Station.
• –PW models terminate with the connector for a PWENC or prewired system.
What are the different cable termination options available for Campbell Scientific sensors?
Many Campbell Scientific sensors are available with different cable termination options. These options include the following:
• The –PT (–PT w/Tinned Wires) option is the default option and does not display on the product line as the other options do. The cable terminates in pigtails that connect directly to a datalogger.
• In the –C (–C w/ET/CS110 Connector) option, the cable terminates in a connector that attaches to a CS110 Electric Field Meter or an ET-series weather station.
• In the –CWS (–CWS w/CWS900 Connector) option, the cable terminates in a connector that attaches to a CWS900-series interface. Connection to a CWS900-series interface allows the sensor to be used in a wireless sensor network.
• In the –PW (–PW w/Pre-Wire Connector) option, the cable terminates in a connector that attaches to a prewired enclosure.
• In the –RQ (–RQ w/RAWS Connector) option, the cable terminates in a connector that attaches to a RAWS-P Permanent Remote Automated Weather Station.
Note: The availability of cable termination options varies by sensor. For example, sensors may have none, two, or several options to choose from. If a desired option is not listed for a specific sensor, contact an application engineer at Campbell Scientific for assistance.
Where are the available cable termination options listed for a particular sensor?
Not every sensor has different cable termination options. The options available for a particular sensor can be checked by looking in two places on the Ordering tab of the sensor’s product page:
• Model number
• Cable Termination Options list
If a sensor is offered in an –ET, –ETM, –LC, –LQ, or –QD version, that option’s availability is reflected in the sensor’s model number. For example, the 034B is offered as the 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, and 034B-QD.
All of the other cable termination options, if available, are listed on the Ordering tab of the sensor’s product page under “Cable Termination Options.” For example, the 034B-L Wind Set is offered with the –CWS, –PT, and –PW options, as shown on the Ordering tab of the 034B-L’s product page.
Note: As newer products are added to our inventory, typically, we will list multiple cable termination options under a single sensor model rather than creating multiple model numbers. For example, the HC2S3-L has a –C cable termination option for connecting it to a CS110 instead of offering an HC2S3-LC model.
Resources and Links
(1) Allen wrench from original mfg
Shipping Weights & Dims
11" x 11" x 15"
27.9 x 27.9 x 38.1 cm