INFICON Protec P3000(XL) Helium Leak Detector - Manual (Page 30)

2-3
How the Protec P3000 Works
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For RC versions only
The RC version has a connectors plate for the external display unit instead of the
built-in main unit display. Two LED's left of the plug provide information about the
status of the Protec P3000, even when the external display unit is disconnected:
• The green LED will indicate that the Protec P3000 is in operation (switched on).
The green LED will show continuous green light if an external display unit is
connected and will blink if no external display unit is detected.
• The red LED will be blinking in case of an error message, continuous red light
indicates a warning.
If no display unit is connected, error messages or warnings may be acknowledged
by pressing both buttons of the SL3000 sniffer line simultaneously.
The external display unit also offers four buttons:
• The START / STOP buttons have no function (the external display unit may also
be used with other INFICON leak detectors which need these buttons)
• The MENU button will open the software menu.
• The ZERO button will set the current background reading to zero. (For details on
the ZERO function see Section 4.4.1)
Fig. 2-2 Conncetor plate with LEDs