System; Measure - Fluke 6270A Service Manual

6270A
Service Manual

System

The system diagnostics menu supplies information on these system components:
•
Door Switch – This is a mechanical-electrical switch near the front panel that
senses when the panel is open. When open, the system vents and the
module information screen shows. When closed, the system operates
normally. If the status shows "Open" when the door is closed, the switch
could be malfunctioning or need adjustment.
•
Test Port Vent Valve and Ref Port Vent Valve – These are normally-closed
isolation valves installed on the internal pressure manifold. When the system
is in the vent mode, these valves should be open. In other modes, such as
control and measure, the valves should be closed. If the status is different
than that described, the valve may be malfunctioning.
•
Ref Port Vent Valve – This is a normally-closed isolation valve installed on
the internal pressure manifold. When in gauge measurement mode, the valve
is closed. When in absolute or tare, the valve is open. If the status is different
than described, the valve may be malfunctioning.

Measure

The Measure diagnostics menu shows information on each PMM connected:
•
PMM – This is the PMM range and name.
•
Pressure – This is the pressure measured by the sensor in the PMM.
•
Temperature – This is the ambient temperature inside the PMM. The
temperature inside the PMM can be as much as 5 °C higher than room
temperature during normal operation.
•
Test Valve and Ref Valve – This is a normally-closed isolation valve
installed on the internal pressure manifold in front of each PMM. The test
valve isolates pressure to the PMM and is controlled by the internal software.
When a PMM is selected in the Module Selection menu, the test valve should
be open. For manual testing and troubleshooting, select a single PMM and
test the valve. In other modes such as Fast and Auto, the Product opens and
closes the valves based on a control algorithm. If the status is different than
described, the valve may be malfunctioning.
At the bottom of the menu, there is a pneumatic self-test function that
automatically tests each PMM to verify that the valves are opening and closing
properly. The system controls pressure as necessary and monitors the valve
states. If a valve is not functioning properly, an error is shown that indicates
which valve is malfunctioning.
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