Functional Test Of Atmos S 351 - Atmos S 351 Service Manual

6.0 Maintenance and repair
6.1.3

Functional test of ATMOS S 351

The functional testing of the unit shall be done with the supply voltage (
The following functions must be checked:
The accessories of the ATMOS S 351 must be attached to the unit for the following functional test.
Intermit function (increase vacuum, hold vacuum, reduce vacuum, pause)
The following intermittent settings shall be chosen in Service Menu 1 (Press the Standby key during starting):
• Final vacuum (Vac Limit) = -500 mbar
• Increase/decrease time (incr. decr. time) = 10s
• Holding time (Vac hold) = 15s
• Pause = 10s
(The parameters to be set are in the Adjust Intermit Menu)
• Connect the end of the suction hose to the vacuumgauge
• Switch off/on: A beep should be heard
• The display must be easily readable, there should be no dirt particles visible and no pixels should be missing.
Change into Intermit-mode by pressing the Intermittent key:
Phase 1: Unit creates vacuum within about 10 seconds (upper left counter in the display counts from 10s downwards)
(-500 mbar). Observe increase of vacuum. Note end value of vacuum.
Phase 2: The vacuum is held for about 15 seconds (see counter).
Ph
ase 3: Unit decreases the end vacuum set within about 10s (see counter) (-500 mbar) to 0 mbar. Observe vacuum
reduction.
Phase 4: System is completely ventilated. The unit pauses for about 10 seconds.
After Phase 4 the unit begins again at Phase 1.
Leave the Intermit-Modus by pressing the intermittent key.
Function of overfl ow/short circuit
Start the Intermit-mode by pressing the intermittent key.
Connection of the test unit to the test sample (to overfl ow contacts left or right): The terminal marked with (+) should be connected to the
upper contact unit, the terminal marked with (-) to the lower contact unit.
• Setting "Overfl ow high":
• Setting "Overfl ow low":
Setting "Short circuit":
Leave the Intermit-Mode by pressing the intermittent-key.
20
The overfl ow message must appear. Any vacuum present is destroyed.
The overfl ow message must appear. Any vacuum present is destroyed.
Produces a continuous short circuit. The short circuit message must appear at regularintervals.
Any vacuum present is not affected by this.
±
10%) on the type plate and with the given mains frequency.