Fluke Calibration RUSKA 7615, Руководство пользователя

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Theory of Operation
The Hydraulic/Pneumatic Module
2
2-5
Fluid Reservoir
The reservoir supplies system fluid to the pump through the reservoir valve. The reservoir
has a 1000 cc capacity and is provided with a low level sensor.
System Valve
The system valve isolates pump from the system. It is a high pressure valve actuated by a
pneumatic dome valve. This pneumatic dome valve has a diaphragm operator which is
driven be an internally regulated 80 psi air pressure which is sourced from the air supply
port. The air is controlled to this valve through a three way normally open solenoid valve.
High Speed System Transducer
The High Speed system transducer is used for the pressure measurement during high
speed pressure control. This is indicated by the system by labeling the pressure reading as
“High Speed” just below the measured pressure value on the main screen. Once the
pressure has stabilized, the High Accuracy Sensor (see next section) is then displayed.
This is indicated by the system by replacing the “High Speed” label with the word
“Precise”. The high speed system transducer is periodically compared and automatically
aligned to the high accuracy pressure sensor.
High Accuracy Pressure Sensor
The system transducer is used for the high accuracy measurement of pressure. This
transducer should be calibrated at regular interval to maintain its stated accuracy.
An optional dual sensor version is also available in which case there would be two
system transducers each of which has an accompanying isolation valve and pressure
relieving mechanism for sensor protection (See next section, Chapter 2,
Optional - Second High Accuracy Sensor).
Optional - Second High Accuracy Sensor
The system is also available with an optional second High Accuracy Sensor. The second
sensor is provided with a lower full-scale pressure range than the primary High Accuracy
Sensor. This is provided in order to allow the system to operate through a wider pressure
range while maintaining high accuracy pressure measurements. This transducer should be
calibrated at regular interval to maintain its stated accuracy. This sensor is isolated from
the system when the system is operating at pressures higher than its full scale operating
range. It is also protected by its own pressure relief mechanism. When a second sensor is
installed into the system, the system can automatically switch between the two sensors.
Test Port
The device under test is connected to this port.
Supply Port
The supply air is connected to the supply port. The supply air should be regulated
between 100 to 110 psi. The pneumatic side is protected by a relief valve.
Reservoir Select Valve
This three-way valve is located on the back panel of the instrument. Internal or external
reservoir is selected using this valve. If external reservoir is selected then an external
reservoir must be connected to the external reservoir port connection. Normally this valve
is set in the mid position (off) during shipment.