Edwards ELD500 Series, Instruction Manual

Page: 61 / 121

D13510840D - Partial flow adaptor
Page 51
Examples:
For a quick point time of T
Q
= 0 seconds and by operating "START", the valve V10 is initially
not opened. This setting is recommended in the case of large volumes and dirty test samples.
For T
Q
= ∞ (>>) valve V10 is opened upon operating "START". At an inlet pressure of pE < 3
mbar the leak detector will enter into the measurement mode and display leak rates. V10
remains open until pressing "STOP". The setting of T
Q
is recommended in such cases where
it is acceptable to wait until the leak detector enters into the measurement mode and when
it is not necessary to display a leak rate before that time.
Equipment
Standard specification

Partial flow valve block

DN 25 KF right angle valve

Control cable

Vacuum hose

Small flange connections

90° elbow/pipe bend
Operation
For proper start up and operation of the partial flow adaptor it is absolutely necessary to take
note of the information provided in the separate operating instructions for the components
of the system besides the information given in these operating instructions.
Start up
An overview of the arrangement of the partial flow adaptor is given in Figure 42 .
Switch the ELD500 off and disconnect any possibly connected test objects from the test port.
Connect the partial flow valve block (see Figure 42 item 2) to the test port of the ELD500.
When doing so, the metal filter on the rear should point backwards and the lateral vacuum
flange should point to the left.
In order to exclude the effects of any interference, the right-angle valve DN 25 KF
(see Figure 42 item 1) must now be flanged to the side port of the partial flow valve block
(see Figure 42 item 2) so that the second flange points to the front and so that the LEDs of the
valve point to the left.
The partial flow pump (see
Figure 42 item 8) is connected via the vacuum hose
(see Figure 42 item 9) and the pipe bend/elbow (see Figure 42 item 10) to the DN 25 KF right-
angle valve (see Figure 42 item 1). Provide the electrical connection through connection cable
(see Figure 42 item 5) as follows:
1. Screw together the round connection plug with the cable coupling of the right angle
valve.
2. Connect plug (see Figure 42 item 3) to valve V9.