38 Before operation
Flow rate adjustment
A flow rate can be adjusted by the stroke rate and stroke length.
The stroke rate is indicated in spm (stroke per minutes).
Stroke rate adjustment is a main way to adjust a
fl
ow rate.
Stroke length is the moving distance of the plunger.
A
fl
ow rate per shot can be controlled by changing stoke length. The widest
moving distance is de
fi
ned as 100% stroke length.
First adjust the
fl
ow rate by stroke rate adjustment. Use stroke length adjust-
ment for the range where stroke rate adjustment can not reach.
Determine a suitable stroke length and stroke rate, taking account of the pump
operating condition and liquid characteristics.
The following procedure is recommended.
Change a stroke rate with stroke length 100% to adjust a
fl
ow rate.
• See "Stroke rate adjustment" on page 39 and "Stroke length adjust-
ment" on page 41 for detail.
Measure a
fl
ow rate.
If the
fl
ow rate is lower than a speci
fi
ed level, increase the stroke
rate and measure the
fl
ow again.
Change the stroke length for
fi
ne adjustment.
Measure the
fl
ow again to see the speci
fi
ed level is obtained.
5
1
2
4
3
Summary of Contents for EHN-R
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