Chandler Engineering Ametek Quizix 5000 Series, Руководство пользователя

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Chandler Engineering
5000 SERIES PUMP MANUAL
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5.3.1 Safety Pressure Overpressure (Safety Pressure Setting)
The most basic of these safety features is safety pressure monitoring, which is performed in the
controller firmware. With this feature, the user specifies a safety pressure at a level higher than the
expected running pressure. If the system exceeds the safety pressure setting, a safety pressure
overpressure error message is displayed on the system monitor and the cylinders stop pumping. The
controller stops the pump when the safety pressure is reached. Due to momentum, if the piston is
moving forward at a fast rate when the overpressure event is detected, the system pressure may
exceed the safety pressure before the cylinder comes to a complete stop.
5.3.2 Digital Underpressure
The transducer for the Quizix pump system has been selected so that at zero pressure, the transducer
output is 0.5 volts. The controller includes a safety feature that provides an error message if the
transducer voltage drops below a certain level or pressure signals are not received by the controller.
In this case, PumpWorks assumes that there is a transducer failure. A digital underpressure error
message is displayed on the system monitor and the cylinders stop pumping.
5.3.3 Analog Overpressure
The analog overpressure feature is implemented in the pump controller and limits the maximum
value allowed from the A/D converter. The analog overpressure feature is fixed at approximately
5% over the maximum pressure specification of the pump system. It cannot be set by the user. If an
analog overpressure error occurs, the pump cylinders stop pumping and an error message is
displayed.
5.3.4 Safety Rupture Disk
The safety rupture disk is the final safety feature designed to prevent the pump system from
exceeding a specified pressure. For example, for pump cylinders rated at 10,000 psi, the safety
rupture disk activates at approximately 12,500 psi (see Table 5-1 for other models).
The safety rupture disk is activated if there is a transducer failure that cannot be detected by the
normal safety systems. It is also activated in the unlikely event of a hardware or software failure
where the pump system does not respond to normal controls. In this case, the safety rupture disk
activates to protect the pump, tubing, and external components from damage.
...
IMPORTANT
It is very important that you install tubing into the fitting of the relief fluid exit and that
it is plumbed to an appropriate receptacle. This prevents fluid from spraying into the
atmosphere in case the rupture disk is activated. This is particularly important if you
are using flammable or highly corrosive fluids.