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- Metering pump -The Effect of Operating Frequency on Repeatability-
Metering pump -The Effect of Operating Frequency on Repeatability-
A change in operating frequency affects pumped volume and repeatability. Repeatability decreases when the operating frequency is higher than the value specified on a drawing. An example of measured changes in repeatability resulting from varying operating frequencies is shown in the table below.
Model Number Used: NRP-500P
Measurement conditions: The pumped volume is set at 500 mm3 when the operating frequency is 2Hz.
Other than the conditions specified, the measurements follow the standard test conditions.
Note: Details such as specifications, etc., may be changed without notice.
Experimental Data of Repeatability Versus Operation Frequency
| Operating Frequency | Repeatability |
| 5 Hz | +5.88% |
| -7.00% | |
| 3.3 Hz | +5.08% |
| -2.39% | |
| 2 Hz (Value is specified on the drawing.) | +0.09% |
| -0.28% | |
| 1.7 Hz | +0.09% |
| -0.09% | |
| 1.3 Hz | +0.07% |
| -0.09% | |
| 1 Hz | +0.10% |
| -0.10% | |
| Manual Operation (Single Discharge) | +0.12% |
| -0.25% |
Note 1: Details such as specifications, etc., may be changed without notice.
Note 2: (*Upper Row： Error of the Max. Value, Lower Row： Error of the Min. Value)
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