Vega VEGAMET 381 Ex Safety Manual - page 15
6
.2 Test application 1 - One relay output
1
Set the simulated sensor current directly (max. 2 %) below the
relay switching point "on".
2
Set the simulated sensor current directly (max. 2 %) above the
relay switching point "off".
1
Set the simulated sensor current directly (max. 2 %) above the
relay switching point "on"
2
Set the simulated sensor current directly (max. 2 %) below the
relay switching point "off"
Used SIL relay contact must be closed with point 1 and opend with
point 2.
PTC = 97 %
6
.3 Test application 2 - Two relay outputs for range
monitoring
1
Set simulated sensor current directly (max. 2 %) below the relay
switching point "on“ for the upper range limit
2
Set simulated sensor current directly (max. 2 %) above the relay
switching point "on“ for the upper range limit
3
Set simulated sensor current directly (max. 2 %) above the relay
switching point "off“ for the upper range limit.
4
Set simulated sensor current directly (max. 2 %) below the relay
switching point "off“ for the lower range limit.
Point 1 and 2: Both SIL relay contacts must be closed.
Point 3: The SIL relay contact for monitoring the upper range limit must
be open.
Point 4: The SIL relay contact for monitoring the lower range limit must
be open.
Procedure for mode
overfill protection
Procedure for mode dry
run protection
Expected result
Coverage of the test
Procedure
Expected result
VEGAMET 381 Ex • 4 … 20 mA signal conditioning instruments
15
6 R
ecurring function test
39686
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EN
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