Chapter 4 – Functions of the instrument  
UM-23100B-U User manual ATEQ F CLASS Page 54/90 
2.1.3. 13)  Peak measurement 
The peak measurement mode is used to measure a part dynamically.  The instrument 
measures the leak, which can change at a given moment during the test.  The 
instrument stores the greatest pressure drop (∆P/∆t) and then displays it at the end of 
the test. 
This function is important in circumstances where the test part changes during the test 
cycle.  The system checks the part for leaks in ∆P/∆t throughout the change and the 
leak is measured continuously.  At the end of the test cycle, the instrument has stored 
the maximum instantaneous leak (the greatest leak) recorded during the test and 
displays the result.  
 
LEAK ∆P/∆t 
MAXIMAL 
VALUE 
MEASURED 
0 
TIME 
 
Note:  Peak measurement mode only works in 
∆
P/
∆
t and excludes the use of ATR 
mode. 
2.1.3. 14)  Reference volume 
The program uses the programmed test volume to measure the normal flow at the test 
output. 
When the reference output volume is different from the test output volume, it is possible 
to set parameters for the exact value of the reference volume to obtain correct 
measurements in the event of results in negative figures.  
This function may only be used on a unit of measurement of flow. 
Confirm the function in the 
CONFIGURATION/EXTENDED 
MENUS
 menu