How the Protec P3000 Works 27
2.2.3 Valve Holder
The valve holder carries the valves that control the gas flow to the Wise Technology
sensor. These valves are used to select the sensitivity of the system, to activate a
protection mode against high helium contamination and to set the system into
STANDBY mode. The Protec P3000 software continuously analyses the situtation and
sets the correct valve position via the control unit.
2.2.4 Control Assembly
The control assembly (microprocessor) is the central assembly of the Protec P3000’s
electronics. All other subassemblies are controlled and monitored by this assembly.
The microprocessor which is located here is thus continuously informed about the
status of the entire Protec P3000 and can respond accordingly. In order to accept
commands from the operator and to output measured values and messages, the
control subassembly is linked to the display unit.
2.3 Description of the Displays and User Interfaces
2.3.1 Main unit display
This subassembly is used to communicate with the operator. It accepts commands
from the 8 keys on both sides of the display and outputs measurement results and
messages via the display.
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:
Fig. 10 Main unit display
Pos. Description Pos. Description
1 Menu buttons 1 to 4 2 Menu buttons 5 to 8
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