The PR electronics 7501 is an innovative field mounted Ex d explosion and flame proof temperature transmitter with local operator interface for easy field programming, review and diagnostics of process values.
The new transmitter builds on PR electronics’ vast experience in innovating state-of-the-art temperature measurement devices and is the first new product in an extensive revitalisation of the company’s temperature portfolio.
Unique technology
Using unique technology, the user can easily configure the transmitter from the front of the housing in any environment simply by touching the optical buttons – even when wearing gloves.
Chief technology officer Stig Lindemann says, “The optical buttons combined with the 10 mm explosion proof window is a patent pending technology. It enables the user to access the instrument in all operating environments without opening the housing. The optical buttons are immune to interference of ambient light sources and false triggering caused by shadows and reflections, and it dynamically adapts to accumulation of dust and moisture.
The user can also perform advanced HART programming from the front, and as a result, significantly reduce the need for handheld communicators. The easy to read 60 mm high definition display provides a clear indication of the process magnitude, supported by a radial bar graph in real time.
The transmitter delivers HART 7 functionality with HART 5 compatibility and can be configured to measure 2, 3 and 4 wire RTDs, 13 different thermocouple types as well as bipolar mV and resistance signals, and it provides an analog output.
Easy configuration and operation
The transmitter has three mounting options: on the temperature sensor, on a pipe, or on a bulkhead. Configuration is easy and logical with scrolling help texts and three optical buttons: up arrow, down arrow and OK. Thanks to the user-friendly menu guide, it is possible to configure the device in less than 1 minute.
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