Deep Vacuum - Fieldpiece SMAN SM480V Operator's Manual

Deep Vacuum

Follow recommended evacuation practices
from equipment manufacturer and training
Alarms can be adjusted in the MENU (page 28)
1. Close all manifold valves.
2. Setup your tools and equipment (see diagram).
Connect HIGH port to liquid line service port.
Connect LOW port to suction line service port.
Connect VAC port to vacuum pump.
3. Turn on your vacuum pump.
4. Open VAC valve.
The vacuum sensor is now exposed to your pump, but it will not
display until HIGH/LOW manifold valves are opened. This ensures the
measurement is of the system and not just the manifold.
5. Open HIGH and LOW manifold valves.
6. Press ALARM to activate the low alarm.
The stopwatch starts. The rate of change is displayed in units
per minute. The smaller the rate of change, the closer you are to
stabilization. You may need to improve your setup if rate slows well
before reaching your desired vacuum (see Tips for Better Evacuations).
7. Once the the low alarm level is reached, the backlight blinks and
alarm sounds. Press any button (other than ENTER) to silence alarm.
8. Close VAC valve to block the pump.
Do not close HIGH and LOW valves or you'll block the system and
measure just the manifold!
9. Turn off your vacuum pump.
10. Press ALARM to activate the high alarm and start the stopwatch.
11. Once the high alarm level is reached, the backlight blinks, alarm
sounds, and the stopwatch stops. Press any button (other than
ENTER) to silence alarm.
12. Close HIGH and LOW manifold valves.
The vacuum sensor is now blocked from the system (page 39).
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Tips for Better Evacauations
• Remove schrader cores and depressors with a core removal tool.
• Use shortest vacuum rated hoses with largest diameter available.
• Do not evacuate through hoses with low loss fittings.
• Inspect the rubber seals at both ends of your hoses for damage.
• Change pump oil before and during the job. Change pump oil on-
the-fly without losing vacuum with Fieldpiece vacuum pumps.
• When the vacuum pump is blocked, a slow rise that stabilizes may
signify moisture is still present in the system. A continuous rise to
atmosphere indicates a leak. Check hoses, tools, or the system itself.
• Measurements are less representative of the entire system when
the vacuum pump is on because pumping creates a pressure
gradient. Block the pump and allow the system to stabilize before
assuming the measurement is of the entire system.
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