A-4
Instruction and Operation Manual
X-CM-QmBS-eng
Part Number: 541B052AHG
June, 2008
Appendix A Dimensions and Specifications
QmBS Sensor / QTA Transmitters
Table A-2 Gas Flow Rates
a
a. Flow rates that produce approximately 14.5 psid (1.0 bar) pressure drop on air at 70 °F (21.1 °C) and 500 psi (35 bar)
Mass
Volume
lb/hr
kg/hr
SCFH
SCCM
Typical flow rate
QmBS2
0.225
0.102
2.99
1408.0
QmBS3
0.881
0.400
11.7
5521.8
QmBS4
8.343
3.78
110.82
52300
Table A-3 Liquid and Gas Performance
Accuracy
a
a. Stated flow accuracy includes the combined effects of repeatability, linearity, and hysteresis. All specifications for liquids
are based on reference conditions of water at 70 °F (21.1 °C). At temperatures other than 70 °F (21.1 °C), you can
expect an additional density error of approximately 0.0005 g/cm
3
per °C.
Standard
±1.0% of rate or
% of rate, whichever is greater
Optional
±0.5% of rate or
% of rate, whichever is greater
Repeatability
±0.05% of rate or
% of rate, whichever is greater
Reproducibility
±0.05% of rate or
% of rate, whichever is greater
Zero stability
lb/hr
kg/hr
QmBS2
0.0004
0.0002
QmBS3
0.0022
0.001
QmBS4
0.1264
0.012
Liquid density
Range
0.01 to 0.3 g/cm
3
Accuracy
±0.005 g/cm
3
Repeatability
±0.002 g/cm
3
Temperature
Ambient and process
0 to 65 °C (32 to 149 °F)
Accuracy
±0.5 °C (±1.0 °F)
Maximum operating
pressure
Standard
35 bar (500 psi)
Optional
100 bar (1500 psi)
±
zero stability
flow rate
---------------------------------
⎝
⎠
⎛
⎞
100
×
±
zero stability
flow rate
---------------------------------
⎝
⎠
⎛
⎞
100
×
1
2
---
±
zero stability
flow rate
---------------------------------
⎝
⎠
⎛
⎞
100
×
1
2
---
±
zero stability
flow rate
---------------------------------
⎝
⎠
⎛
⎞
100
×
