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7. Align both transmitter and receiver. To do so, perform the following steps:
a. Open path gas detectors only:
The left alignment screw (1 or 2) must be loosened so that the component can be aligned by using the right alignment screw
(1 or 2) and vice versa.
Gas warning systems with TX S
i
Align both transmitter and receiver with the alignment screws (1 and 2) in such a way that the maximum signal strength
is achieved (
ii
Align both transmitter and receiver with the alignment screws (1 and 2) in such a way that the measuring points of both
transmitter and receiver on the HART
The tolerance limit of 30 scale divisions from 0 must not be exceeded after the alignment (see dotted line at TX S in
the figure on page 18).
iii Carefully tighten the other alignment screws (1 and 2).
iv Tighten the 8 screws of the gimbal gradually. In this process, check and ensure that the measuring points of both trans-
mitter and receiver remain within the 30 scale divisions from 0 on the HART
Gas warning systems with TX L:
i
Align both transmitter and receiver with the alignment screws (1 and 2) in such a way that the maximum signal strength
is achieved (
ii
Align the receiver with the alignment screws (1 and 2) in such a way that the measuring point of the receiver on the
®
HART
handheld terminal is as close to 0 as possible.
The tolerance limit of 30 scale divisions from 0 must not be exceeded after the alignment (see dotted line at TX L in
the figure on page 18).
iii Vertically align the transmitter with the alignment screws (1 and 2).
iv Horizontally align the transmitter with the alignment screws (1 and 2).
The 4 measuring points of the transmitter should move to the center (see TX L in the figure on page 18).
v
Carefully tighten the other alignment screws (1 and 2).
vi Tighten the 8 screws of the gimbal gradually. In this process, check and ensure that the measuring points of both
transmitter and receiver remain within the 30 scale divisions from 0 on the HART
in the figure on page 18).
®
handheld terminal are as close to 0 as possible.
in the figure on page 18).
®
handheld terminal.
1
1
2
Operation
®
handheld terminal.
2
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