Edwards ELD500 Series

D135-10-880C - Operation
Page 71
The ELD500 DRY allows the following settings
Calculate inlet area background
Main menu > Settings > Filter and Background > Calculate inlet area background
This function calculates the background of the inlet area. The ELD500 has to be in the
following conditions:
1. Mode vacuum
2. Mode VENTED (minimum 25 seconds)
3. Inlet port blanked off
4. Minimum 20 minutes since power on
After starting this function the leak detector starts with evacuating the inlet area. Earliest two
minutes after start the measured value can be accepted as Background Inlet Area. This value
will be saved.
Background suppression
Main menu > Settings > Filter and Background > Background suppression
Softkey 3: Background suppression
Setting of the internal condition for the background.
Softkey 7: Leak rate filter
The type of leak rate filter can be chosen.
Softkey 3: Off
Deactivation of the offset function. Under certain circumstances a positive leak rate can be
displayed. This setting should be used by experienced users only because of the high
possibilities of measuring wrong leak rates.
Softkey 6: inlet area
Additionally to the internal offset (background) the offset of the inlet area will be
subtracted. This function for the inlet area is only possible in standby mode, therefore this
value has to be determined with the menu point Calculate Inlet Area Background.
Softkey 7: internal only (default)
With start the ELD500 defines the internal offset (background) and subtracts this value
from the leak rate signal, so that just the leak rate is shown in the display. This setting
should be used as standard setting for the ELD500.