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how manys ways dp transmitter can be calibrated having
range of -150 to 400mmwc,what side pressure u will apply?
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Answer Posted / jigar anadkat
You Can Calibrate in Two different Ways:
1) By applying normal pressure according to the range i.e.
(-150) mmwc with vacuum pump and observe 4 mA and keeping
this pressure on LP side apply 400 mmwc in HP side and
observe 20 mA (in steps).
2) Apply 150 mmwc on LP side and observe 4 ma [HP-LP=0-150
= (-150 )], then keep LP side open 0 mmwc and create
550mmwc (400+150) span by applying pressure on HP side and
observe 20 mA (in steps). If no pressure on both the side
your TX will give o/p = 8.36 mA
| Is This Answer Correct ? | 2 Yes | 1 No |
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