VEGA VEGAMET 625 - Manual (Page 43)

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8 Application examples
VEGAMET 625 • Double channel HART
28970-EN-130701
instructions manual of VEGAFLEX. For this application, do not
enter a dielectric figure directly on VEGAFLEX, because this
value will be overwritten automatically by VEGAMET 625
•
Adjustment
– Each VEGAFLEX is shipped with default settings. The values of
this adjustment are automatically tranferred to VEGAMET 625
during the setup of the interface measurement. Hence, manual
adjustment is usually not necessary. Should the instrument
require a special adjustment, this adjustment can be carried
out any time under "Measurement loops - Adjustment". Keep in
mind that this adjustment must then be carried out separately
for all three measurement loops.
TS
d1
h1
h2
d2
1
L2
L1
Fig. 13: Interface measurement
1 Reference plane
d1 Distance to the interface, meas. loop 1
d2 Distance to the level, meas. loop 2
TS Thickness of the upper medium (d1-d2), meas. loop 3 (displayed value)
h1 Height - Interface (displayed value)
h2 Height - Level (displayed value)
L1 Lower medium
L2 Upper medium
8.4 Pump control 1/2 (running time controlled)
Pump control 1/2 is used to control several pumps with the same
function dependent on the previous running time. Always the pump
with the shortest running time is switched on and the pump with
the longest running time switched off. With increased requirement,
all pumps can also run at the same time dependent on the entered
switching points. With this measure, a steady utilization of the pumps
is achieved and the reliability increased.
All relays with activated pump control are not assigned to a certain
switching point but are switched on or off depending on the accu-
mulated operating time. The signal conditioning instrument selects
the relay with the shortest operating time when the switch-on point
Functional principle