VEGA VEGASWING 83A - Manual (Page 28)

28 VEGASWING 81A and 83A
5.2 Replacement of electronics
• Interrupt the voltage supply and discon-
nect the connection cables and the switch-
ing current circuit on the switching cabinet.
• Make sure that there is no Ex-atmosphere.
• Loosen the four screws of the housing
cover with a screwdriver and remove the
cover.
• Disconnect the connection cables on the
oscillator.
• Remove the old oscillator and insert the
new one.
• Set the A/B-switch to the same position as
on the old oscillator (not with SWING
E82 Z).
• Set the potentiometer for the density ad-
justment of the new electronics to the same
value as on the old oscillator.
• Connect the connection cables again and
switch on the voltage supply .
The sensor is immediately ready for opera-
tion.
• Replace the housing cover and tighten the
screws.
Note when replacing the housing cover
that the transparent light guide (inspection
glass) is above the LED. When the housing
cover is not r eplaced correctly, the switch-
ing condition of the sensor is no longer
visible and the housing is not sealed
optimally.
Test procedure
A-mode B-mode
1 Simulation of a fault signal ( approx. 3 s after release of key ) 1)
Level relay deenergized > 22 mA 2)
Failure relay deenergized < 2,2 mA 2)
2 Simulation of an empty signal (approx. 1,5 s)
Level relay energized 8 mA 2)
Failure relay energized
3 Simulation of a full signal (approx. 1,5 s)
Level relay deenergized 16 mA 2)
Failure relay energized
4 Return to the actual operating condition (covered/uncovered)
1) as long as the key is pushed, the instrument signals failure.
2) VEGASWING state
With the provided current values, you can also carry out the function test directly via a PLC or
a processing system.
Diagnosis