Control circuit and viscosity monitoring device using the circuit |
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| 申请号 | JP29225288 | 申请日 | 1988-11-18 | 公开(公告)号 | JPH01222314A | 公开(公告)日 | 1989-09-05 |
| 申请人 | Norcross Corp; | 发明人 | ROBAATO EI NOOKUROSU JIYUNIA; | ||||
| 摘要 | PURPOSE: To produce a control circuit at low cost with a little components by providing a 1st circuit for operating a valve for supplying air and a 2nd circuit for operating a valve for supplying a solvent or a concentration agent. CONSTITUTION: When potential difference (V 1 -V 2 ) gets higher than a 1st voltage, a coil 10 is energized, and an air valve 20 is operated so that a piston 22 can be moved to a starting point position in viscous liquid. When the potential difference (V 1 -V 2 ) gets lower than a 2nd voltage, a coil 11 is energized, and a solvent valve 21 is operated so that the solvent can be supplied into the viscous liquid. When the piston 22 is freely dropped or driven in the viscous liquid, at its ending point position, a limit switch 17 is turned on by the piston 22, a current flows through a current monitor loop, the time point when the piston 22 arrives at that ending point position can be monitored, and viscosity is measured. Thus, this control circuit has comparatively a little components and can easily be assembled at low cost. COPYRIGHT: (C)1989,JPO |
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