Burkert 8176, Инструкции по безопасности

Страница: 7 / 36

T he intrinsically safe circuits are electrically separated from parts which can be grounded
.
F or applications requiring instruments of category
2
G
,
the intrinsically safe power supply and
signal circuit can correspond to protection class ia or ib
.
F or connection to a circuit with
protection class ib
,
the
fl
ame proo
fi
ng identi
fi
cation is EE x ib IIC T
6
.
F or applications requiring instruments of category
1
/
2
G
,
the intrinsically safe power supply and
signal circuit must be in conformity with protection class ia
.
F or applications requiring instruments of category 1
/
2 G the LEVEL TRANSMITTER LT 8176
.
C
***
H
***,
LT
8177
.
C
***
H
***
is preferably connected to appropriate instruments with electrically
separated intrinsically safe circuits
.
4
A pplication conditions
4 . 1 P ermissible ambient temperatures
4
.
1
.
1
F or use as category
1
/
2
G instrument
T emperature class P ermissible ambient temperature
on the electronics
P ermissible ambient temperature
on the transducer
T
6
-
40
… +
57
°
C
-
20
… +
58
°
C
T 5
-
40
… +
72
°
C
-
20
… +
60
°
C
T
4
,
T
3
,
T
2
,
T
1
-
40
… +
85
°
C
-
20
… +
60
°
C
F or the speci
fi
ed permissible ambient temperatures on the sensor and electronics
,
the
80
%
consideration of EN
1127
-
1
sect
.
6
.
4
.
2
is taken into account
.
I f the LEVEL TRANSMITTER LT 8176
.
C
***
H
***,
LT 8177
.
C
***
H
***
are operated at higher
temperatures than those speci
fi
ed in the above table
,
please make sure by means of
appropriate measures that there is no danger of ignition from these hot surfaces
,
under
consideration of the
6
K self
-
warming on the transducer
.
T he permissible temperature on the
electronics
/
housing should not exceed the values speci
fi
ed in the above table
.
T he application conditions during operation without explosive mixtures are mentioned in the
manufacturer instructions
.
4 . 1 . 2 F
or use as category
2 G
instrument
T emperature class P ermissible ambient temperature
on the electronics
P ermissible ambient temperature
on the transducer
T
6
-
40
… +
57
°
C
-
20
… +
74
°
C
T 5
-
40
… +
72
°
C
-
20
… +
89
°
C
T
4
,
T
3
,
T
2
,
T
1
-
40
… +
85
°
C
-
20
… +
90
°
C
LEVEL TRANSMITTER LT
817
*.
C
***
H
***
7
32829
-
EN
-
070615