4000 Evaluation Unit
Service Manual 4-59
Function keys
PUMP Switches pump on/off (the pump status is displayed in field 7)
ZERO Used to start automatic zero calibration.
LEAK To carry out a leak test: Close off the probe! (see Operating Manual)
Any leak error is displayed in field 8.
Current "service values" are printed out.
SOL Operates the valves
The two valves are selected in sequence.
(The valve status is displayed in field 7)
<< Quit the 4-gas menu and return to service menu.
If the measuring instrument unit develops a fault and
has to be returned to the works, always include a
"service printout" to assist the error diagnosis.
SOL 1 ON
SOL 2 ON
SOL 1 OFF
SOL 2 OFF