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Flue
EXGP Probe
Process
Simple Device Conforming
600°C to 1400°C
to BS5345 Part 4: 1977
(1250°C
continuous)
HAZARDOUS AREA
(Zone 1, Class IIB)
Flameproof Interface Electronics Unit
EExd. IIB T6 Conforming to BS5501 Part 5: 1977
Reference Air Line Entry
R Type Thermocouple
mV Signal
(0 to 1400°C)
Regulated Reference Air
Unit (003000241)
O
mV Signal
2
(–20 to +180mV)
Fig. 1.2 System Schematic
1 INTRODUCTION
NON HAZARDOUS AREA
4680 Transmitter
Retransmission
Output
Two 4 to 20mA Output Signals
(0 to 1400°C and 0.25 to 25%O 2 )
Mains Supply
Mains Powered Pump
Unit (003000240)
Mains Supply
or
4685 Transmitter
or
Mains Supply
or
3
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