Frequently Asked Questions and Answers


Below we have listed some of the most frequently asked questions and answers relating to PR products and solutions. Click on the question to view the answer.


Why does my 4xxx device make a buzzing sound when powered by AC voltage?


What is a “buffered voltage output”?


What is the difference between the 3185 and the 3186?


How do I measure a thermocouple with a 5114, 5115 or 5116 device?


What does "contact hysteresis" mean?


Should I open the 4xxx device to program it?


How do I know if, a mA signal is is active or passive?


How do I know if my input is an NPN or PNP?


How do I mount and remove the PR 4500 displays? 


“SE.BR” appears on my 57xx display, what does this mean?


Devices in the 2000, 4000 or 5000 series do not produce a voltage output?


My tablet/smartphone cannot connect to 4512?