VEGA VEGATROL 20 Ex - Manual (Page 17)

VEGATROL 20 Ex 17
4 Supplement
3.3 Operation
If in case of overfilling, the tuning fork is covered up to the
switch point with the liquid gas, the level relay de-ener-
gizes with a delay of approx. 500 msec. and the respective
LED lights.
This remains as long as the fork is covered.
If the level reduces below the switch point, the relay
energizes with a delay of approx. 1 sec. and the
respective LED extinguishes.
4 Supplement
4.1 Fault signals
There are two error classes concerning the condition of
the LED in the front panel:
-
error during set-up
- error detected during the self-monitoring.
Level and fail safe relays de-energize in both cases.
In case of failures during set-up, start again (switch off the
voltage and switch on again) and repeat the set-up acc. to
section 3.2.
If an error is detected, the voltage must be switched off
first, the failure (e.g. line break) removed and then the
voltage switched on again. It is not necessary to repeat
the set-up.
Error during set-up
lights
lights for approx. 2 sec.
lights
Failure reason Failure treatment
External failure Remove the fault and
(line break, short-circuit, start again
fault SWING-electronic)
Set-up was carried out Start again and repeat
when tuning fork was set-up with uncovered
covered tuning fork
Set-up key was pushed Start again and repeat
too long (> 6 secs.) set-up correctly
Error during self-monitoring
lights
lights
Failure reason Failure treatment
Line break, Remove failure and start
short-circuit again
Component failure Inform VEGA-service or
return the instrument for
invertigation
VEGATOR 526 W Ex
on
VEGATOR 526 W Ex
on