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intech

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Discussion starter · #1 ·
I live in Northeastern Indiana, and was wondering if there was any schools around to get some good training on pneumatics. and help would be great thanks.
 
I went to a local class at a controls supply house in my area, It was a good two day course on Pneumatics. Keep your eyes and ears open in your area and if not sure ask some of your local supply houses.
 
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Sometimes the local controls companies put on classes, too. Check in with the Johnson, Honeywell, Siemens, and Invensys controls office (or rep) and see if they offer classes.
 
if you are willing to pay, i would fly there and teach you more than you ever wanted to know. or you could get basic pneumatic books on the websites of the manufacturers. these are more like pamphlets than books.
 
Discussion starter · #7 ·
thanks for all the reply's

ill keep checking around, went to one put on by trane and it really wasnt what i was looking for, it was mainly for if you didnt know anything about pneumatics.

i dont know that much, enough to be really dangerous and cause more problem before im done,

looking for some classes that go into calibrating reciever-controllers

we have some accounts with trane multizone systems all pneumatic, but im lost when it comes down to calibrating all the controls for the economizer and the mixed temp hot water reset

plus my boss doesnt know it all and he isnt a good teacher when it comes to it.
 
the way to calibrate a reciever-controller is the same way asa thermostat. monitor the branch line (output pressure to the controlled device) while monitoring your sensor input. A mixed air controller maintains the damper position to provide you with the temperature you set on the controller. take your temperature reading as close to the ma sensor as possible, now figure out your spring range (3-13, 3-8, 8-13 psi). set the reciever-controller at the temp your meter is reading and your branch line should read the middle of the spring range. if its 3-13, the mid point is 8. add the two numbers and divide by two ( ie 8-13 = 10.5). if the branch line does not equal the mid point of the spring range, find the calibration screw, slide bar, or whatever to make this so.
this way works well. use the same process for any type of control (pressure, temperature, humidity), just make sure you use the right measurements, and a GOOD, TRUSTY GAUGE. hope this helps
 
Pneumatics

To really understand a subject you should know how everything works. For example most pneumatic sensors/transmitters work form 3 to 15 PSi over their range. For example a 0 to 100 degree sensor would be 3 Psi at 0 degrees and 15 Psi at 100 degrees. Using some formulas you can calculate the pressure at a given temperature. First off to find the sensitivity of a sensor you divide 12 by span of the sensor. Then you can use the following fomula to calculate the pressure,

Sensitivity 12 divided by span

Example 12 divided by 100 = .12 change per degree

PSI = (Temperature measured - Base Temperature) X sensitivity + 3

Example 50 degrees (50 - 0) = 50 X .12 = 6 + 3 = 9 psi
 
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