WXT530 Series Overview

Vaisala Weather Transmitter WXT530 Series
Weather & Environment

The Weather Transmitter WXT530 is a compact all-in-one weather instrument. This webinar covers the wide-range of sensing options, and how the WXT530 series is a cost-effective solution for a variety of applications.

The following topics are discussed in the webinar:

  • WXT530 in brief​
  • Applications where the WXT530 is a good fit​
  • Outputs & inputs​
  • Settings​ & sensor configuration
  • Operational & heating power management​
  • Best practices for installation: mounting, cables, bird prevention, surge suppression option, dimensions, sensor alignment​
  • Sensor calibration
  • Retrofit installation​

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Tim Nicoll

System Integration Engineer

Tim Nicoll has been with Vaisala since February of 1988, first working as a production technician, then moving into manufacturing as a manager and engineer. Today, he is a System Integration Engineer and has worked with nearly every sensor and system within Vaisala over the past 29 years. He specializes in designing custom one-of-a-kind weather systems and networks, integrating third party sensors, and integrating Vaisala systems into customer networks.

Questions & Answers

Is the WXT530 Series designed for mobile applications or just stationary deployments?

It can be used with either. On a mobile application, the user will need to manage the direction offset by either entering an offset into the WXT manually, or adding a data logger, such as the Vaisala QML, to accept the WXT data, and a compass. Then you can make the wind direction change. Vaisala has experience with these methods for numerous mobile systems.

How we can validate and calibrate the WXT?

The user cannot calibrate the WXT. This is done prior to leaving the factory, and the calibration needed after that is the changing of the PTU module (the new PTU module comes calibrated with a calibration sheet). To validate the sensor, you can use a calibrated set of PTU sensors to compare to the WXT, for the wind a simple zero wind check can be done by simply placing a box over the sensor, making sure not to let it touch the wind sensors prongs. The precipitation is as simple as just tapping the metal plate on the top of the WXT and making sure the reading changes.

How does the wind direction correction work?

In the Configuration Tool, there is an icon for sensor settings. In this menu there is a place to enter a direction offset. Enter the direction offset and the WXT will apply the offset to the wind direction to correct it to the proper reading.

Does the WXT have protection against thunderstorms, etc.? What about other factors?

The WXT530 does not have built-in lightning protection. Due to the location and mounting (at the top of a pole, for example) in the field, the sensor is susceptible to lightning. However, using the WSP150 will help protect the WXT. It is designed to protect the data logger, computer, or other electronics that are connected to the WXT.

What is the procedure for downloading a file?

There are two ways to load configuration files into the WXT. The first is with the Configuration Tool software. This is a simple dropdown menu, where you pick the single configuration file and upload it to the WXT, or you can download the configuration from the WXT. The second way is to use Hyperterminal. In this method, you have up to six files, one for each part of the WXT (Communication, Wind, PTU, Precipitation, Analog sensor, and Supervisor). Make a Hyperterminal connection from the sensor to the data port of the WXT, and then send a text file to the sensor using the "Send TXT File" function of Hyperterminal. You can also request the configuration in the same way. Vaisala can help you with the creation of the text files, so that you get the configuration you need.

Would you define the poll mode for the WXT530?

A command is sent from a data logger. For example, the commands are aM1 for wind, aM2 for PTU, aM3 for precipitation, aM4 for the analog sensors, and aM5 for the supervisor message. The "a" is the address of the sensor.

What is the NMNES sentence?

The wind NMES message looks like this: $WIXDR,A,302,D,0,A,320,D,1,A,330,D,2,S,0.1,M,0,S,0.2,M,1,S,0.2,M,2*57
PTU message: $WIXDR,C,23.3,C,0,C,24.0,C,1,H,50.1,P,0,P,1009.5,H,0*75
Precipitation message: $WIXDR,V,0.02,M,0,Z,30,s,0,R,2.7,M,0,V,0.0,M,1,Z,0,s,1,R,0.0,M,1,R,6.3,M,2,R,0.0,M,3*51
The supervisor message: $WIXDR,C,20.4,C,2,U,12.0,N,0,U,12.5,V,1,U,3.460,V,2,G,HEL/___,,4*2D. 
The only other messages are the SDI-12 message and then ASCII messages.