ATEQ F SERIES User Manual

Chapter 4 – Functions of the instrument
UM-23100B-U User manual ATEQ F CLASS Page 43/90
2.1.3. 4) Transient attenuation (ATR)
9 Problem:
Is this pressure drop which occurs during
the test time due to a leak or a transient
effect?
The test environment is not always ideal
for the measurement of pressure drops.
There are several momentary events (ex:
temperature or volume variations...) that
can influence the measurement. We call
them transient effects.
Fill Stab. Test Dump
Time
Pressure
Pressure
drop
To avoid any interference, it is possible to increase the stabilisation time to obtain the
ideal measurement conditions during the test phase. However, increasing the
stabilisation time for each test may not be acceptable at the normal production speed.
9 Operational principle:
The principle consists of measuring the pressure variations caused by transient
phenomena through the use of a learning cycle and then removing these variations from
the final test result for a part.
Three ATR functions are available: ATR0, ATR1 and ATR2. ATR1 and ATR2 are
different because of their learning cycles.
9 ATR0:
The initial value of the transient is known. Parameters must be set manually.
The ATR may only be used on parts which have identical behaviour during the
test, in other words, parts which have an identical transient.
Associated parameters to be set are: Start (Initial value of the transient), Transient
(actual, non modifiable value of the transient) and Percentage drift (Drift tolerance on
acquisition of the transient, as a % of the FAIL level).
) Select the option and enter settings if necessary.
9 ATR1:
The value of the transient is unknown. A special learning cycle must be carried out.
The learning cycle for this function must be
carried out on a good leak proof (PASS)
part.
The instrument carries out a normal test
cycle and considers that the pressure
variation measured at the end of the cycle
is the transient. This value is saved and
taken away from the final result of
subsequent tests.
Reasoning: the part is good, therefore the
pressure drop measured is the transient.
Fill Stab Test Dump Time
Pressure
∆P = Transient

ATEQ F SERIES Specifications

General

Brand	ATEQ
Model	F SERIES
Category	Security Sensors
Language	English