Power Supply Unit; Air Purges; Isolating Valves - CODEL Energy Tech 401 Installation, Operation And Maintenance Manual

EnergyTech 401
Operating and Maintenance Manual
2.1.4

Power Supply Unit

2.1.5

Air Purges

2.1.6

Isolating Valves

Page: 16
A non-volatile RAM section - requiring no battery back-up - enables all of its
operation data to be retained during a power down condition. The instrument
can resume operation immediately power is restored, without having to be
recalibrated.
All operation data is entered via a surface-mounted keypad, and a 32-character
LCD provides the operator with measurement details and diagnostic information.
Inputs are available to receive the 4-20mA outputs of normalising measurement
transducers - O , temperature and pressure, if required. This data can also be
2
entered via the keypad or via the serial data port.
A serial communication facility within the processor, allows the instrument to
communicate with other CODEL analysers and a central data logging unit.
The power supply unit is housed in a fully-sealed cast-aluminium enclosure and
contains the power supplies for the instrument. A switched mode power supply
is utilised to provide an extremely stable power source, able to cope with large
fluctuations in the supply voltage. The contact outputs are also taken from this
unit - data valid and high gas alarm.
The purge unit has its own integral adjustable mount and provides the interface
between the site mounting flange and the transmitter and receiver units. The
purge is designed to provide a steady laminar flow of air away from the
instrument lens, preventing optical contamination.
A supply of air to the purge is essential.
Isolating valves, if required, may be attached between the air purges and the
duct. These will allow protection for personnel servicing instruments on high
pressure ducts.
CODEL
Monitoring Solutions