| | | transmitter are mainly comparable to conventional or HART transmitters. Changing the output signal does not change the need for periodic calibration. Although modern fieldbus transmitters have been improved compared to older transmitter models, it does not eliminate the need for calibration. There are also many other reasons, such as quality systems and regulations, that make the periodic calibrations compulsory. Calibrating fieldbus transmitters The word "calibration" is often misused in the fieldbus terminology when comparing it to the meaning of the word in metrology. In fieldbus terminology, "calibration" is often used to mean the configuration of a transmitter. In terminology pertaining to metrology, "calibration" means that you compare the transmitter to a traceable measurement standard and document the results. So it is not possible to calibrate a fieldbus transmitter using only a configurator or configuration software. Also, it is not possible to calibrate a fieldbus transmitter remotely. Fieldbus transmitters are calibrated in very much the same way as conventional transmitters - you need to place a physical input into the transmitter and simultaneously read the transmitter output to see that it is measuring correctly. The input is measured with a traceable calibrator, but you also need to have a way to read the output of the fieldbus transmitter. Readingthe digital output is not always an easy thing to do. When fieldbus is up and running you can have one person in the field to provide and measure the transmitter input while another person is in the control room reading the output. Naturally these two people need to communicate with each other in order to perform and document the calibration. While your fieldbus and process | | automation systems are idle, you need to find other ways to read the transmitter's output. In some cases you can use a portable fieldbus communicator or a laptop computer with dedicated software and hardware. In many cases, calibrating a fieldbus transmitter can be cumbersome, time-consuming and may require an abundance of resources. Until now no practical way to calibrate fieldbus transmitters has existed. | | transmitter to measure correctly. Being a documenting calibrator, MC5 will automatically document the calibration results of a fieldbus transmitter in its memory, from where the results can be uploaded to calibration management software. This eliminates the time-consuming and error-prone need for manual documenting using traditional methods. The MC5 is a compact, easy-to-use and field compatible calibration solution offering also a lot of other functionality. The MC5 can be used for calibrating Foundation Fieldbus H1 or Profibus PA transmitters. | | |
| | Main advantages of the MC5 Fieldbus Calibrator The most important advantage of the MC5 Fieldbus Calibrator is the possibility to calibrate, configure and trim the Foundation Fieldbus H1 or the Profibus PA transmitters using a single unit. Because it is a combination of a calibrator and a fieldbus configurator, the MC5 is able to perform traceable calibration on fieldbus transmitters. Fieldbus configurators and configuration software are not able to do this; they can only be used to read/ change configurations. Calibration can therefore be performed by one person instead of two. The MC5 is able to calibrate standalone transmitters, or when they are connected to a live fieldbus as with the Foundation Fieldbus. There is no need for a separate power supply because the MC5 includes an integral power supply for poweringup a stand-alone transmitter during calibration. Therefore, the MC5 can also be used during commissioning when the fieldbus and control systems are still idle. When new fieldbus transmitter models appear on the market, customers can easily update their MC5s by entering device descriptions into them. Therefore, the MC5 is never obsolete. | | |
| | | MC5 Fieldbus Calibrator Beamex has introduced a revolutionary MC5 Fieldbus Calibrator, which is a combination of a multifunction process calibrator and a fieldbus configurator. The MC5 can be used for calibrating Foundation Fieldbus H1 or Profibus PA transmitters. With the MC5 Fieldbus Calibrator you can calibrate a fieldbus pressure and temperature transmitter, as the MC5 can simultaneously generate/measure the transmitter input and also read the digital fieldbus output of the transmitter. The MC5 can also be used to change the configurations of a fieldbus transmitter. If you find that the fieldbus transmitter fails in calibration, you can also use the MC5 to trim/adjust the fieldbus | | |
