Owner's manual

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