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U30 and excitation wiring with S-VIA-CM14 modules

Here is a wiring diagram for use with external sensors and the S-VIA-CM14s. Remember the excitation current required to power the external sensors cannot exceed 50 milliamps total. http://www.onsetcomp.com/files/U30%20VIA%20and%20S_VIA_CM14.JPG
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SMS text messaging

Sending SMS through mobile phones is easy. If you can be reminded through email, you can now be reminded through SMS.
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U30 Analog Inputs

This information is included in the U30 manual. See attachment. Includes hardware.
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Data logger is shutting off prematurely

A discharge of static electricity may cause a running data logger to stop recording. Precautions should be taken to prevent this while handling the data logger. Discharges may occur when there is a charge difference between the data logger and a cable being connected to it or when a person touches an exposed jack.
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Weather station setup

Unfortunately, we do not have installers for our weather stations. We do, however, have a series of videos along with the complete user manual to help you assemble your station.
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How often do temperature data loggers need recalibration and/or servicing?

All sensors drift over time and they can be tested in a controlled environment to make sure that they are running within the specifications outlined in the User's Manual. You can use methods such as a simple ice bath or an environmental chamber to verify your device is operating correctly.
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Logger power failure and data loss

The data is stored on non-volatile EEPROM. For data loggers with external batteries: change batteries and offload data, then relaunch normally. For data loggers with internal batteries: as long as the EEPROM has not been damaged, the data can be retrieved by Onset. Please contact the place of purchase for a return authorization number and request data back service.
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Rapid battery consumption (outdoor loggers)

All Users: Check both the logging and the sampling interval to make sure they are greater than one-minute intervals. For example, with a sampling interval of one second, the HOBO logger is constantly on and there is a constant drain to the batteries. If your application calls for such an interval, you may need to replace the batteries more frequently
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Maximum sensor cable length

The entire network (all sensors combined) cannot exceed 100 meters. As long as your total cable length is below this, it does not matter how you designate the individual cable lengths. It is important to insure that the connections are weatherproof.
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Possibility of exposure to chemicals or chemical vapors

This is dependent on the data logger you are using and the chemical and/or concentration of the chemical to which the data logger is exposed. Many chemicals will have an adverse effect on the data loggers and/or the sensors that the loggers utilize. Contact your authorized sales representative with questions regarding specific chemical contact with the data logger that you are using.
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