What is an electropneumatic regulator?
It's a device that controls air pressure with a variable electrical signal (current or voltage). Those controlled by current, usually 4-20 mA, are called I/P (pronounced "I to P") transducers. Voltage units, E/P ("E to P") transducers generally use a 0-5 or 0-10 volt control signal. With a 4 mA signal you get the lowest rated output and 20 mA gives you the maximum output. The output is proportional for everything in between.
Where do I get the control signal?
It depends on the application. Most automated systems use a PLC (Programmable Logic Controller) set up for the job at hand. There are multi-meters and calibrating meters available from a number of companies. A power supply connected to a potentiometer or rheostat will also give you a variable signal.
What kind of power source is required?
Almost all of our electro pneumatic transducers are loop driven. This means that the variable control signal provides all of the operating power required. This is also referred to as a two wire system.
How do I choose the correct range?
Generally you always want to use the narrowest range possible for your application. This will provide the greatest accuracy. You will also have to decide if you need to regulate down to zero psi or not.
What happens if I lose power?
Our transducers will always fail closed (minimum output) with the loss of power when used in the direct mode. The Type 500X ,550X ,1000 ,1500 will fail open (maximum output) when set up as reverse acting.
How do I choose the best Type for my application?
The Type 500X(T1000) is best for most valve automation projects and is a good starting place for most general purpose applications. The 550X(T1500) is similar in design to the 500X(T1000)except in a smaller housing. Use it for densely packed applications. It also offers some pressure output options not available in other models.
Why do I have to calibrate these pieces if I'm buying the exact range I need?
Even though we calibrate the I/P's here before they're shipped, it's a mechanical adjustment that can shift when bumped during shipping. Supply pressure and the position it's in can effect the output of the 500X(T1000) and 550X(T1500).
Any recommendations or tips when installing?
Always put a filter regulator in the air supply in front of an I/P. It will stabilize the supply pressure and protect the transducer from contaminants, thus prolonging its life expectancy. These devices can be mounted in any position, but the 500X(T1000) and 550X(T1500) must be calibrated in the same orientation that they're being used. Generally speaking they'll work best upright (pneumatic ports at the bottom).