Emerson IFT9701 사용자 설명서
Model IFT9701 Transmitter Instruction Manual
7
Getting Started
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Begin
2.1.4
Visibility of tags
For personal and system safety, all tags attached to the transmitter housing must remain visible. Clean
or replace them as necessary.
or replace them as necessary.
2.2
Transmitters approved for ATEX Zone 1
If the transmitter carries an ATEX Zone 1 approval, wiring compartments are labeled as shown in
Figure 2-2.
Figure 2-2.
•
The sensor wiring compartment is rated EEx i (intrinsically safe), and may be opened at any
time. See Label 1 in Figure 2-2.
time. See Label 1 in Figure 2-2.
•
The field wiring compartment is rated EEx e (increased safety), and should remain closed
when power is on. See Label 2 in Figure 2-2.
when power is on. See Label 2 in Figure 2-2.
•
The circuit board compartment is rated EEx d (flameproof), and should remain closed at all
times after the transmitter has been installed. If the transmitter is approved by ATEX as
flameproof, the compartment has a lockout device, shown in Figure 2-2. The lockout device
must be loosened and rotated before the compartment cover can be unscrewed.
times after the transmitter has been installed. If the transmitter is approved by ATEX as
flameproof, the compartment has a lockout device, shown in Figure 2-2. The lockout device
must be loosened and rotated before the compartment cover can be unscrewed.
WARNING
Explosion hazard
The circuit board compartment is rated EEx d
(flameproof), and should remain closed at all times after
the flowmeter has been installed.
(flameproof), and should remain closed at all times after
the flowmeter has been installed.
To avoid risk of explosion in an explosive atmosphere:
•
Read label that points to compartment cover before
accessing circuit board compartment. Figure 2-2
shows the location of the labels on the transmitter
housing.
accessing circuit board compartment. Figure 2-2
shows the location of the labels on the transmitter
housing.
•
Shut off power, and wait at least 2 minutes before
removing EEx d (circuit board) compartment cover.
Figure 2-2 also identifies the EEx e (field wiring), EEx i
(sensor wiring), and EEx d (circuit board)
compartments.
removing EEx d (circuit board) compartment cover.
Figure 2-2 also identifies the EEx e (field wiring), EEx i
(sensor wiring), and EEx d (circuit board)
compartments.