Introduction - Honeywell Apex Technical Handbook

MAN0604_Issue 09_02-2013 Apex
2110M8030

1. inTROdUcTiOn

Apex is a gas detection system that consists of a Transmitter Unit, a certified gas sensor and a set
of accessories. The Transmitter Unit, Certified Sensor and Certified Junction Box accessory are all
certified for use in potentially hazardous areas and are protected against water and dust ingress
to IP67.
Typical working environments are oil and gas distribution, petroleum extraction and chemical
manufacture.
System installation is straightforward. Components should be installed in accordance with the
procedures described in this handbook and to local or national installation codes of practice.
The Transmitter Unit acts as the local system controller and features a large LCD screen and
four control buttons that are used for operator interaction. Control of the system is implemented via
a system of software-driven hierarchical menus that include such operations as cartridge change,
system configuration, etc. Remote control of the system can be made via an optional
digital interface.
The Transmitter Unit can have the Certified Sensor fitted to it locally or mounted remotely using a
Certified Junction Box and additional cabling up to 100 metres long.
The Transmitter Unit provides a 4-20mA output, as well as an optional digital output. Relays for
operating locally-wired devices, such as lights, horns, etc. are included. The range of accessories
enhances operation of the system and includes a collecting cone, weather protection, etc.
The Certified Sensor is compatible with a range of more than 40 sensor cartridges that use catalytic
bead, thick film and electrochemical cells.
The interchangeable sensor cartridge determines which gas is monitored. All gas cartridges are fully
calibrated when supplied.
The Certified Sensor uses intrinsically safe circuits to drive the cartridges. Cartridges may therefore
be exchanged without powering down even in the presence of an explosive gas atmosphere.
Field calibration of the sensor, if required, is also possible. The cartridges available are listed in
Appendix A.
The output from the sensor provides a gas concentration reading that is displayed on the LCD
screen on the front of the Transmitter Unit and is also transmitted on the 4-20mA output and the
optional digital interface.
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