ATEQ D520 - Page 69

Chapter 4 – Functions of the instrument
UM-22100H-U User manual ATEQ D520 Page 59/122
b) ATR2
Corresponds to ATR 1 but the potential leakage of the part is taken into account when
the value of the transient is determined during the special cycle.
Associated parameters to be set: Initial (Initial value of the transient), Transit (actual and
non modifiable value of the transient), Tolerance (Drift tolerance on acquisition of the
transient, % of the reject level).
) Select the option and adjust settings if necessary.
For ATR learning cycles, see paragraph 3.7. "ATR learning".
When a parameter is modified but no learning cycle has been carried out, an "ATR"
fault occurs. The "alarm" and "end of cycle" outputs are activated.
Learning may be carried out on a value greater than the reject level and the "Pass" and
"end of cycle" outputs are then activated. However, the "ATR" fault appears if the
difference between the transient and the initial value is greater than the reject level.
2.1.3. 12) Peak hold
The peak hold mode allows the
measurement a part
dynamically. The instrument
measures the flow which can
evolve at a given time during
the test. The instrument
memorizes the most important
flow, then displays it at the end
of the test.
FLOW
MAXIMUM
VALUE
MEASURED
0
TIME
Note: The peak hold mode excludes any use of the ATR mode.
2.1.3. 13) Recovery thresholds
This option offers the possibility of having two reject levels: the level of intolerance (the
part is bad and irrecoverable) and the level of recoverable reject (the part is bad but can
be reworked to be accepted). This option is particularly used in casting for parts which
may be impregnated.
REFERENCE REJECT
LEVEL
REF REJECT
RECOVERABLE LEVEL
0
TEST REJET
RECOVERABLE LEVEL
GOOD
PARTS
RECOVERABLE
PARTS
BAD
PARTS
0 10 20
Example
FROM 0 TO 10 THE PARTS ARE GOOD
FROM 10 TO 20 THE PARTS ARE RECOVERABLE
OVER 20THE PARTS ARE BAD
TEST REJECT LEVEL