Back set for all conduit sizes is not the same. The greater the diameter of the conduit the length of back set increases. Without the diameter size of the conduit, an answer can not be given.
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The offset is the preset distance that is marked on the shoe of the bender. This preset mark allows for shrink back when bending. It allows you to make a perfect bend if a conduit run comes to a wall and has to go up the wall. It takes into account the outside diameter of the conduit and adds it to the shrink back of the bend to make the conduit fit exactly up against the 90 degree angle of the wall.See Sources and Related links below.
The 'Stub-up', or 90º bend, Back to Back Bends, Three Bend Saddles, and offset bends.
Answer for USA, Canada and countries running a 60 Hz supply service.A total of 360 degrees between openings, regardless of distance, is the NEC's limitation. From experience I know that any time you go beyond 270 degrees you are going to have a difficult pull regardless of what other steps you take.360 degrees = 4 - 90 degree bends270 degrees = 3 - 90 degree bendsAs always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
On a differential amplifier while there is some voltage offset there is also current offset which is dependent on the value of the F/B resistance the bigger value the more offset.
op-amp can be nulled using offset voltage about +/- 1.5 mv to offset pins