11
Chapter 3. MOUNTING AND WIRING
*3: MCF models and connecting pipe sizes are shown below.
▲
Pipe one size smaller than the MCF
●
Pipe the same size as the MCF
+
Pipe one size larger than the MCF
*4: The figure below shows an example of the MCF0080 connected with a reducer. The accuracy is within
the specification range (±3 % FS).
When connecting the MCF to a pipe 1 size larger than the MCF port (for example, the MCF0080 to a 1/2
inch pipe), to determine the straight pipe length, use the section of the table marked “Pipe one size larg-
er in dia. (connected with reducer).”
*5: The figure below shows an example of the MCF0150 connected with an enlarging pipe. The accuracy is
within the specification range (±3 % FS).
Do not connect a smaller size pipe to the MCF without a straight pipe section. Doing so might cause a
reverse flow in the measurement module, even though there is a regular forward flow in the main flow
path. Therefore the display might indicate a negative value or an extremely low flow rate compared with
the actual rate.
When connecting the MCF to a pipe 1 size smaller than the MFC port (for example, the MFC0150 to a
1/4 inch pipe), to determine the straight pipe length use the section of the table marked “Pipe one size
smaller in dia. (connected with reducer).” In addition, on the upstream side add 5D to the straight pipe
length.
* The specified length is the straight pipe length when connecting a pipe one size smaller than the
MCF.
MCF0150
1 / 2 i n c h
1 / 4 i n c h
2 5 D
1 / 4 i n c h
MCF0150
1 / 2 i n c h
3 / 8 i n c h
2 0 D
3 / 8 i n c h
MCF0080
3 / 8 i n c h
1 / 4 i n c h
3 / 8 i n c h
5 D
Model No./Pipe size
1/8 inch
1/4 inch
3/8 inch
1/2 inch
3/4 inch
MCF0080
▲
●
+
MCF0150/0151
▲
●
+
Model No./Pipe size
3/4 inch
1 inch
1 1/4 inch 1 1/2 inch
2 inch
2 1/2 inch
MCF0250
▲
●
+
MCF0400
▲
●
+
MCF0500
▲
●
+
