INFICON Protec P3000(XL) Helium Leak Detector - Manual (Page 34)

2-7
How the Protec P3000 Works
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Notice The PRO-Check reference leak is not part of the Protec P3000 shipment
and needs to be ordered as a separate part no. (see section
1.3.2
Accessories ).
Notice If you have not purchased the PRO-Check reference leak, warning 71 (“No
communication with test leak”) will be issued on first start-up. Please go to
SETTINGS / INTERFACES / PRO - CHECK and set the PRO-Check to “ DISABLED ”
to prevent future warnings (see section 4.5.6 )
Notice PRO-Check Warntime Expire Date (See Section 7.7.5).