Galil Visual-ICE MRI, Руководство пользователя

Страница: 86 / 122

10-6 User Manual
10.3 Gas Issues
Symptom Potential Causes / Solutions
The Visual-ICE MRI System does not
allow testing of a needle in a locked
channel
1. Verify that the system is at operating pressure.
Reference Table 4-2 for information on working gas
pressures.
2. Check that the Junction Box Harnesses are
connected. Reference Section 4.5 and Section
4.6 for information on connecting the Junction Box
Harnesses.
3. The Argon Shutoff Valve may be in the GAS OFF
position. Verify that the Argon Shutoff Valve (Figure
2-3) is in the GAS ON position to allow sufficient
gas flow.
4. If necessary, further open the gas cylinder valve
by turning the valve counterclockwise to allow
sufficient gas flow. Verify that appropriate pressure
is displayed on the Gas Indicator.
Needle is not freezing during the Needle
Integrity and Functionality Test
1. The argon gas cylinder valve may be closed. Open
the gas cylinder valve by turning the gas cylinder
valve counterclockwise to allow sufficient gas flow.
Verify that appropriate pressure is displayed on the
Gas Indicator.
2. Confirm that the argon gas cylinder is connected to
the argon inlet.
3. The needle may be clogged. Try to test it again.
4. If the needle still does not freeze,
•
Press the Stop button to stop all activity on the
channel.
• Hold the needle connector firmly with one
hand and unlock the channel to disconnect the
needle.
• Move the needle to a different channel and run
the test again.
NOTE: If only one needle is connected to the
channel, there may be some residual pressure
behind the needle connector.
5. If the problem persists, replace the needle with a
new needle.