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Differential Pressure Testing Differential Pressure Calibration Curves 2" Dattus fM2 psig 40 90 35 75 30 Differential Pressure (in w.c.) 60 25 45 20 30 15 15 10 5 0 0 1000 2000 3000 4000 5000 6000 7000 8000 Flow Rate (acfh) Figure 5.6 2” Dattus fM2 Higher Pressures Dattus fM Meter Technical Reference Guide 5- 8 9000