Notes on how to use this handbook, Symbols of vacuum technology, 1 symbols of vacuum technology – INFICON Protec P3000(XL) Helium Leak Detector User Manual
Page 19: Warning, Caution

General Information
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1.4
Notes on How to Use This Handbook
Important remarks concerning operational safety and protection are emphasised as
follows:
Notice
Indicates special requirements the user must comply with.
The references to diagrams, e.g. (2-1/6) consist of the Section No., Fig. No. and the
Item No. in that order. For example: (2-1/6) means Section 2, Fig. 1 and Item No. 6
(here: mains switch).
1.4.1
Symbols of Vacuum Technology
In the following some important symbols of vacuum technology as used in this
handbook are shown:
Holder for SL3000(XL)
525-006
PRO-Check reference leak for helium
521-001
Calibrated sniffer leaks for helium
S-TL 4, approx.1 x 10
-4
mbar l/s
122 37
S-TL 5, range 10
-5
mbar l/s
122 38
S-TL 6, range 10
-6
mbar l/s
122 39
Warning
Indicates procedures that must be strictly observed to prevent hazards to persons.
Caution
Indicates procedures that must strictly be observed to prevent damage to or
destruction of the Protec P3000 leak detector.
Diaphragm pump
Vacuum gauge