Fluke Calibration RUSKA 7615, Руководство пользователя

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Installation
Hydraulic/Pneumatic Connections
3
3-3
Hydraulic/Pneumatic Connections
Pneumatic connection to the Calibrator is straightforward. The following sections discuss
each port.
Air Supply Port
The supply port must be connected to a well regulated source of dry shop air. Air supply
should be regulated between 100 to 110 psi. Supply port is a ¼ tube connection. The air
supply source should be capable of provide a peak flow rate of 150 Standard Liters per
Minute (300 SCFH).
Note
The Air Supply must be a clean air supply dried to a minimum dew point
of –10
º
C.
Test Port
The test port is designed to control a wide range of volumes. Any leaks on the test port
will cause measurement errors. For best results a minimum volume of approximately
10 in
3
(160 cc) is recommended. For High Speed applications, further minimizing the
volume significantly increases the system speed. A 3 in
3
(50 cc) volume or less is
recommended for high speed applications. Operating the 7615 at volumes less than
3 in
3
(50 cc) could result in damage to the sensor.
The test port is ¼ high pressure connection (autoclave F250C)
Reservoir
The system reservoir must be filled with a no-corrosive fluid and the system bled to
remove all air from the system. Any air in the system will make the pressure
controller erratic.
In the back panel, there is a three-way valve to select either the internal reservoir or the
external reservoir. If you are selecting internal reservoir then make sure that the valve is
turned to point towards internal reservoir.
Purge Hydraulic System
There are a variety of methods to fill a system with fluid and purge it of air. It is
important to understand that the more air that is trapped in a hydraulic system, the less
responsive the system will operate.
A few of the common methods of purging air from the system are noted as follows:
1.
With a pressure port located at the end of the manifold that is believed to have air
present, open a port located at the highest physical location in the manifold and then
start to pressurize the 7615. With the port open to atmosphere, significant pressure
will not build in the manifold. The fluid in the system will displace the air out of the
system through the open port. Once fluid begins to flow from the open port, the 7615
controller can be stopped and the port that is open to atmosphere can be closed. The
system in now ready for operation.
2. A manifold holding the device’s under test can be pre-filled prior to being placed on
the 7615. The best way to pre-fill the manifold is to first evacuating the manifold
with vacuum pump and then switching a three-way valve to isolate the vacuum pump
and open the line to a fluid reservoir allowing the fluid to fill the manifold. This will
minimize the air in the system.
3. Same as option 1) above but using an optional higher flow capacity pump to fill the
system quicker than what the 7615 primary control pump can.