if a dp transmitter has range 100 in H2O and flow is 20mmcf and if the flow is

if a dp transmitter has range 100 in H2O and flow is 20mmcf
and if the flow is changed to 25 mmcf then what is the
formula to determine new range of transmitter

Question Posted / ghulam.muhammad83

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if a dp transmitter has range 100 in H2O and flow is 20mmcf and if the flow is changed to 25 mmcf t..

Answer / carl_ellis

design max flow rate = 20 mmcf
design max DP = 100 in H2O

new max flow rate = 25 mmcf
new max flow rate = ?

The max flow rate increases by 125% over the design max flow
rate:

25/20 = 125% increase

DP calculations are done in normalized percentages. 125% = 1.25

To calculate the corresponding DP at a max flow rate 125%
higher than the original, where X = DP

sq rt of X = 1.25 (square root of normalized percentage
of DP)

X = 1.25^2 = 1.562

1.562 = 156.2% (work in normalized percentage)

156.2% of 100 inH2O = 156.2 in H2O at a max flow rate of 25 mmcf

Carl Ellis
Measure First

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