Teledyne 300P - Percent oxygen analyzer - Manual (Page 11)

3-1 Teledyne Analytical Instruments
Percent Oxygen Transmitter Operation 3
Operation
Operation of the Model 300P Percent Oxygen Transmitter involves
installing the unit, making appropriate sample gas connections, and calibra-
tion.
3.1 Installation
WARNING: For FM approved intrinsically safe operation, an approved safety
barrier must be used to limit the line power to 26 VDC and 125
mA.
3.1.1 System Power Requirements
The Model 300P Percent Oxygen Transmitter requires a 24 VDC
(nominal), reverse polarity protected power source. The maximum and
minimum voltage is dependent on the safety barrier used.
3.1.2 Transmitter
The transmitter enclosure is a weather resistant bulkhead mounted
enclosure. Mount the enclosure to a vertical surface using the four mounting
holes in the flange. Mount the enclosure with the sensor pointing down in a
location where service personnel can reach it.
WARNING: If the enclosure is to be installed in a hazardous area, it must be
interconnected with approved intrinsic safety barriers.
Make gas line connections to the sample in and sample out 1 /
8
" tube
fittings at the bottom of the enclosure.
3.1.3 Junction Box
Power connections are made at the junction box located on the side of
the transmitter housing.
1. Remove the two screws securing the junction box cover and
remove the cover.