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3.4.
Function test
Warning! During the test, the GD1 4 – 20 mA output going to control system will
be indicating gas when performing the procedure below.
Note! To conform with the SIL 2 Safety Integrity Level certification, a yearly
functional test is required..
# Step description
Clean the lenses on the TX and RX as described in
1
section 5.2.
2 Fill the Test Cell as described in the section 4.2.
Position the Test Cell in front of the receiver (RX)
as indicated in the figure.
3
GD1
Page 35 of 76
Illustration / response
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