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P-trol margin of error?
Johnson_Rod
Member Posts: 31
About a month ago I cleaned my pigtail and put a 0-3 gauge on the boiler (one pipe steam, IN5).
I never took the time to sit through multiple cycles to see the p-trol actually cut out on pressure until today.
P-trol is subtractive, with main set just under 2. Didn't cut out until gauge read approximately 2.7
Wondering if anything here is faulty or if this is within an acceptable margin of error for the gauge and/or p-trol.
I never took the time to sit through multiple cycles to see the p-trol actually cut out on pressure until today.
P-trol is subtractive, with main set just under 2. Didn't cut out until gauge read approximately 2.7
Wondering if anything here is faulty or if this is within an acceptable margin of error for the gauge and/or p-trol.
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Comments
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I don't trust the indicator on a control switch. It just gets me in the ballpark. It pays to spend the little extra time, and get it on the money. If possible, I will bend the tab, after setting the pressure, to match.0
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If you look at the face of the scale on the Main and Differential, you will see that they have the ability to slide up or down a bit to align the scale to actual tab setting. I would not bend the tab as that may make it read correctly but the pressure is still going to be 2.7 PSI. Slide the scale so that the tab is at about 2.7 and then turn the screw on top to turn the tab down to 2 PSI.0
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