INFICON Protec P3000(XL) Helium Leak Detector User Manual
Page 66
4-11
Equipment Settings
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Flow limits
HIGH
FLOW
In this submenu the
UPPER
FLOW
LIMIT
and
LOWER
FLOW
LIMIT
for the
HIGH
FLOW
mode
may be set-up. The
LOWER
FLOW
LIMIT
can be set to values between 1500 and 2400
sccm. Default value: 1800
The
UPPER
FLOW
LIMIT
can be varied between 3000 and 3990 sccm.
Default value: 3950
Notice
To be able to measure in H
IGH
F
LOW
and L
OW
F
LOW
mode, the SL3000XL
is equipped with two capillaries (~300sccm and ~2700 sccm). In L
OW
F
LOW
mode only the smaller capillary is used, in H
IGH
F
LOW
mode both are used,
but only the gas from the smaller one is directed to the Wise Technology
sensor.
To monitor the correct flow through the smaller capillary in
HIGH
FLOW
mode
(if blocked, no leaks are detected any more), the flow limits in H
IGH
F
LOW
mode are converted into corresponding
PRESSURE
LIMITS
at the Wise
Technology sensor. If these
PRESSURE
LIMITS
are exceeded or undercut,
this is an indication of the smaller capillary’s flow being out of the normal
range and a warning message (W41 or W42) is issued.
Additional low flow error (only available in ADVANCED mode)
Notice
This submenu is only available when in
ADVANCED
mode and if a SL3000XL
sniffer line is connected to a Protec P3000XL main unit.
In this submenu an
ADDITIONAL
LOW
FLOW
ERROR
may be
ENABLED
or
DISABLED
. If
ENABLED
an additional flow error (E55 / E56) will be issued in addition to the standard
low flow warnings. Only if the
ADDITIONAL
LOW
FLOW
ERROR
is
ENABLED
, the button
LIMITS
LOW
FLOW
ERROR
will be available.
If a
LOW
FLOW
ERROR
occurs, the Protec P3000XL will stop measuring. Only when the
cause of the low flow problem has been resolved and the flow is above the
LIMITS
LOW
FLOW
ERROR
again, the Protec P3000XL will go back into measurement mode.
The
LIMITS
for the
LOW
FLOW
ERROR
may be set -up in the
LIMITS
LOW
FLOW
ERROR
submenu (see below).
Default setting: disabled
Fig. 4-12 Variation of flow limits