SICK PAC50 Notice D'instruction page 70

Operating Instructions
Display mode
No function
+
Table 1: Pushbutton functions
4.3 Functional principle of PAC50 LT (PAC50-FGG) for leakage measurement
4.3.1 Basic description of the variant
The PAC50 LT Leakage Tester (PAC50-FGG) has the same scope of functions as variant PAC50-FGF as well as
an additional integrated function for testing a closed compressed air system or a section of a compressed air
system for leakages. The IO-Link functionality is not available with this variant.
By setting two (pressure) thresholds p
whether a closed compressed air system or a closed section of such a system has a leakage.
The measurement can be started by pressing a button or via a control (input signal at Q1). In this case, Q1
acts as a switching input rather than a switching output.
If the pressure in the system drops, and the upper threshold p
takes for either the lower threshold p
(t ) to be reached is started. Either the measured time value dT or the pressure drop dP (depending on the
out
presetting) is then transmitted via the analog output of the sensor. After the measurement, both values are
displayed alternately with the leakage rate QL in the bottom line of the display. When the lower threshold is
passed, the color of the display changes to red to indicate a leakage.
7 0 O p e r a t i n g I n s t r u c t i o n s | S I C K
Product description
and p as well as a desired measurement duration t
1 2
to be passed or for the end of the desired measurement duration
2
Programming mode
Simultaneous press:
• Returns to display mode
is passed, the measurement of the time it
1
8017612/14NK / 8/2/2019 | PAC50
PAC50
, it can be tested
out
Subject to change without notice