INFICON LDS3000 Modular Leak Detector - Manual (Page 32)

32 Operation
6.10 Calibrating the unit
► To ensure measuring accuracy, the unit must be calibrated regularly.
Information Recalibration at the start of every shift is recommended.
Incorrect measurement results due to premature calibration
If calibrated prematurely, the unit will produce incorrect measurement results.
► Allow the unit to run for at least 20 minutes before performing the calibration.
Calibration Particularities
internal
• with internal test leak • Auto tune (mass adjustment)
• Determining the calibration
factor with the signal of the test
leak tuned
• Determining the background
Following calibration, adjust
the machine/sniff factor as
needed, see
Chapter 6.10.4,
page 34
external
• Vacuum mode: with external
test leak installed in the test
system
• Sniffer mode: with external
sniffer leak
• Taking the test system
characteristics into account
(pressure, split flow ratio)
• Auto tune (mass adjustment)
• Determining the calibration
factor after tuning the signal of
the test leak
• Determining the background
external -
dynamic
• with external test leak installed
in the test system
• Taking the test system
characteristics into account
(pressure, split flow ratio,
measuring time)
• Measuring time based on the
dynamic signal curve
• Determining the calibration
factor before tuning the signal
of the test leak
• Determining the background