VEGA VEGASWING 83 fail safe and signal conditioning instrument VEGATOR 526 Ex - Manual (Page 24)

24 VEGASWING 81 W5 Ex.C, 83 W5 Ex.C fail safe
In case of products with deviating density, this
switch point shifts dependent on the density
and the installation to the direction of the
housing or tuning fork end (see following
table).
A density change by 0,1␣ g/cm 3 effects e.g. a
shifting of the switch point by approx. 2,5␣ mm.
To avoid faulty switching by probable
adhesions, the slide switch (7) must be set to
position 2 in case of adhesive, high viscosity
products.
By means of the slide switch (7) you can also
detect products below 1␣ g/cm
3 (0,5␣ …␣ 0,85␣ g/
cm 3 ). In this case choose position 3. The
switch point is then again at the height of the
marking (25␣ mm above the tip of the fork).-
Note
- Modifications in the switch position are only
effective after the next voltage change-over.
- Modifications can be carried out any time
after the set-up.
Control lamps
LED in the front plate show on/off, switch
condition and failure.
Green
- mains control lamp (5)
- mains voltage on, instrument in operation
Red
- signal lamp (4)
- failure on the sensor circuit by failure of the
sensor of line defect.
- when the fail safe relay is de-energized, the
red signal lamp lights.
Set-up
Pre-adjustments
Before connecting VEGATOR 526␣ Ex to
voltage supply, the mode of the meas. system
and the sensitivity of the sensor must be
adjusted. The adjustment elements are on the
board of the signal conditioning instrument.
Mode
Mode A or B can be adjusted by means of the
hook switch (6).
Mode A (fail safe)
means with covered vibrating element
- Relay de-energizes
- LED-relay output lights
means with uncovered vibrating element
- Relay energizes
- LED-relay output extinguishes
Mode B (not fail safe)
means with covered vibrating element
- Relay energizes
- LED-relay output extinguishes
means with uncovered vibrating element
- Relay de-energizes
- LED-relay output lights
Density of the product
With the slide switch (7) you can modify the
sensitivity of the meas. system. Note that the
switch is never in position 1.
Position 3 - Density of the product
0,5␣ …␣ 0,85␣ g/cm 3
Position 2 - Density of the product
>␣ 0,85␣ g/cm 3
Position 1 - not allowed
The information on the position of the switch
point (see “2 Mounting“) relates to water in
conjunction with the slide switch on position 2.