Fluid Components International CMU - Manual (Page 15)

3.4 Performance characteristics of the CMU sensor
3.4.1 Reference conditions
• Established flow profile
• Inlet section has to correspond to mounting length
• Operation is to be realized in the presence of downstream control valves
• Measurement is to be realized in the absence of any gas bubbles
• Flow tubes are to be kept clean at all times
• Process temperature is to be regulated as specified in Section 3.6.1 Process temperature on
page 23
• Process pressure is to be regulated as specified in Section 3.6.6 Process pressure range on
page 23
• Ambient temperature is to range from + 10 °C to + 30 °C (50 °F to 86 °F)
• Warm-up period: 15 minutes
• Standard calibration is to be realized at 20 %, 50 % and 100 % (three times each)
• High-frequency interference is to be regulated as specified in Section 17.2 Electromagnetic
compatibility on page 110
3.4.2 CMU flow ranges
Model kg/h [lbs/min] kg/h [lbs/min] kg/h [lbs/min] kg/h [lbs/min]
CMU-C 60 [2.2] 600 [22.0] 330 [12.1] 0.06 [0.002]
CMU-D 250 [9.2] 2,500 [91.9] 1,150 [42.3] 0.25 [0.01]
CMU-E 1,200 [44.1] 12,000 [440.9] 5,250 [192.9] 1.2 [0.04]
CMU-G 3,000 [110.2] 30,000 [1,102.3] 20,000 [734.9] 3 [0.1]
CMU-H 6,000 [220.5] 60,000 [2,204.6] 55,000 [2,020.9] 6 [0.2]
CMU-J 20,000 [734.9] 80,000 [2,939.4] 74,000 [2,719.0] 8 [0.3]
CMU-K 25,000 [918.6] 120,000 [4,409.2] 118,000 [4,335.7] 12 [0.4]
CMU-L 30,000 [1,102.3] 200,000 [7,348.6] 200,000 [7,348.6] 20 [0.7]
CMU-N 60,000 [2,204.6] 460,000 [16,901.8] 460,000 [16,901.8] 46 [1.7]
CMU-P 150,000 [5,511.5] 700,000 [25,720.2] 700,000 [25,720.2]* 70 [2.6]
CMU-Q 300,000 [11,022.9] 1,500,000 [55,114.6] 1,350,000 [49,603.2] 150 [5.5]
CMU-R 400,000 [14,697.2] 2,200,000 [80,834.8] 1,900,000 [69,811.9] 220 [8.1]
* ( ⎠ p=0,6bar)
Zero point stability
(of range)
Max.
measuring range
Nominal
( ¬p=1bar)
Mass flow
Min.
measuring range
Reference conditions: in conformity with IEC 770:
Temperature: 20 °C, relative humidity: 65 %, air pressure: 101.3 kPa
Fluid: water
CMU & CT OPERATING MANUAL
Part No 06EN003380 rev 1.6
Page 15 of 112