33
Installation, Operation & Maintenance Manual
OXYvisor Optical Oxygen Analyzer
4.10.2 BOS Sensor with External RTD’s via J-Box
4.10.3 BOS Sensor with External RTD via Rear (Wiring) Compartment
Figure 16 - BOS Sensor And External RTD through Junction Box
Figure 17 - BOS Sensor And External RTD or Zone 1
The BOS sensor is commonly specified without an integral RTD for gas phase applications. An external RTD
can be placed directly into the process and is preferred for accurate temperature measurement under various
process conditions (e.g. process with fast moving temperature, low heat capacity (dry gas) or TProcess -
TAmbient is large). The external RTD can be connected through the J-Box (Fig 16) or through the Rear
(Wiring) Terminal.
For OXYvisor installations in Zone 1, where the model is selected with Agency Approval “1”, the BOS
sensor (as standard) is not allowed to be installed with integral RTD. An external RTD will be the standard
recommended installation. For this case, the RTD can be wired through the Rear (Wiring) Compartment as
shown in Figure 17.
ESC
OXYvisor
BOS-FLEXSENSE
PT1000 RTD
Oxygen
01/06/2017 10:55 AM
850.9 mBar
67.9°F
Err: 0
20.946
% O2
�
�
EXAMPLE - GENERAL ARRANGEMENT
OF OXYVISOR (General Purpose / Class I
Div. 2 / or Zone II 3G) and BOS SENSOR
WITH EXTERNAL RTD
ANALYZER RTD
MOLEX CONNECTION
IN J-BOX
BOS OXYGEN SENSOR
RTD MOLEX CONNECTION
IN J-BOX
ANALYZER FIBER
OPTIC SMA
CONNECTION IN
J-BOX
FIBER OPTIC SMA
TO SMA COUPLER
P/N: B3907-1122
BOS OXYGEN
SENSOR FIBER
OPTIC SMA
CONNECTION IN
J-BOX
BOS OXYGEN SENSOR
WITHOUT RTD
(SEE BOS DATA
SHEET FOR OPTIONS)
EXTERNAL RTD
ESC
OXYvisor
BOS-FLEXSENSE
RIGID CONDUIT or Ex d GLANDS & CABLING
BOS OXYGEN SENSOR
(SEE BOS DATASHEET
FOR OPTIONS)
USER SUPPLIED RTD OR
TEMPERATURE TRANSMITTER
CERTIFIED FOR HAZARDOUS
AREA
EXAMPLE - GENERAL ARRANGEMENT
OF OXYVISOR (Zone I 2G) and BOS SENSOR
WITH EXTERNAL RTD
ANALYZER FIBER
OPTIC SMA
CONNECTION IN
J-BOX
FIBER OPTIC SMA
TO SMA COUPLER
P/N: B3907-1122
BOS OXYGEN
SENSOR FIBER
OPTIC SMA
CONNECTION IN
J-BOX
Oxygen
01/06/2017 10:55 AM
850.9 mBar
67.9°F
Err: 0
20.946
% O2
�
�
Section 4
Installation