9
Chapter 3. Mounting and Wiring
z
Straight pipe length
If the flowmeter and the pipe have different internal diameters (diameters A and B
are different), a straight pipe section is required.
CMS CMS
B B
5D
A A
B B
5D 3D
3D
A
A
CMS CMS
Upstream expansion Downstream reduction
Dierent diameter socket, etc. Dierent diameter socket, etc.
D represents the connecting port size.
CMS0200/0500: 12 mm
CMS9500/0002/0005/0020/0050: 6 mm
CMS CMS
5D
B
BB
5D 3D
3D
AA
B
AA
CMS CMS
Upstream reduction Downstream expansion
Dierent diameter socket, etc. Dierent diameter socket, etc.
If the flowmeter and the pipe have the same internal diameter (diameters A and B
are the same), a straight pipe section is not required.
CMS CMS
A
B
B
CMS CMS
BA B A
Upstream elbow Downstream elbow
Upstream ball valve, etc.
(ow is not disturbed)
Downstream ball valve, etc.
(ow is not disturbed)
A
Handling Precautions
• If a valve like a butterfly valve disturbs the flow, provide a
straight pipe section whose length is five times the pipe
diameter between the flowmeter and the valve.