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1.1 General Description of the Combustion Analyzer
The design of the handheld combustion analyzer “BTU900” isclean and ergonomic with an extremely clear and
user-friendly keypad.
The “BTU900” immediately suggests just how even the most sophisticated engineering can give life to an
incredibly comfortable and easy to use work instrument.
Devised to analyse flue gases, monitor the pollutantsemitted and measure environmental parameters, “BTU900”
uses two electrochemical cellsthat provide the oxygen and carbon monoxide valueswhile a third cell (optional) is
used to measure the pollutantsNO and NOx.
Two external sensorsmeasure the environmental parameters; it is also possible to measure flue draft and carbon
blackand, with the measuring range of up to 200hPa, system pressure and pressure in the combustion chamber
can be measured and the pressure switches checked.
“BTU900” is designed for seven main types of combustible substances, among which natural gas, LPG, Diesel
fuel and fuel oil. Another 16 types of which the chemical composition is known can be entered in its memory.
“BTU900” functions include storing and averaging the measurements acquired, printing the results (through IR
communication interface) and connecting to the computer for filing the data, using a USB connection.
The memory can store 300 complete analysesand the data downloaded onto a PC by means of dedicated SW
and a mini-USB serial communication cable. It is also interesting to note that “BTU900” has just one “Li-Ion”
rechargeable battery pack used for powering the instrument and the printer; it also has a luminousand large (42
x 60mm)LCD displayboasting excellent readabilitythanks to its backlighting and also to the zoom function.
Another characteristic that distinguishesit from other similar productsin the market is the fact the power supply
that comes with the product can carry out the dual function of battery charger and power supply for the
instrument which means the user can carry out analyseseven if the batteriesare completely flat.
Asfar asconcernsmaintenance, it isuseful to know that the user can replace the sensors himself without having
to send the instrument backto the technical Service center: in fact, the sensors are pre-calibrated and “BTU900”
doesnot need recalibrating.
Moreover:
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Operator interface: user-friendly - so much so that it can be used without the instruction manual.
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Luminous and large LCD display: easy readability thanksto the Zoom function and effective backlighting.
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Infrared interface: optional external impact printerisavailable.
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One battery pack: rechargeable for powering the instrument and the printer, indicating the charge level and is
accessible from outside.
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Pneumatic input connectors (gas and pressure/draft) staying inside the profile of the instrument: for
greater resistance to knocks.
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Pre-Calibrated sensors, directly replaceable by the user.
1.2 General features of the Combustion Flue Gas Analyzer
The BTU900 is a portable flue gas analyzer that was meticulously designed to meet statutory requirements and
specific customer demands. It maybe provided in a rugged ABS carry case or waterproof shoulder bag.
The instrument contains one single board with all the basic circuitry, pre-calibrated measuring cells, sampling
pump, silicone keypad, backlit graphic LCD display, and an high-capacity rechargeable Li-Ion battery pack. The
two halvesof the case are firmly secured byfour screwson the rear of the instrument.
The pneumatic path and measuring cells inclusive of electronicmicromodule are located on the back side of the
plastic case and are easily accessed for maintenance and replacement by removing the cover carrying the
functionslabel.
The pneumatic connectors for flue gas sampling and pressure/draft measurement as well as the flue gas
thermocouple connector and the mini-DIN serial interface are installed on the lowerend of the instrument.
On the left hand side there isa plug for connecting the external power supply, the 8-pin min-DIN, the IR interface
and the mini-USB connectors.
The 8-pin mini-DIN connector can be used as a serial interface or as an optional probe interface for
Deprimometer orPt100 combustion air probe.
The user interface consists of a constantly active backlit graphic LCD displayand silicone keypad. Menu screens
and all user messages can be set in the language of the country where it is used; this can be selected through
the menu in one of the available ones. Use of the analyzer issimplified by symbol keysthat give direct access to
main instrument functions. Shifting between the various menu screens is easy and user-friendly thanks to four
cursor keys, an ' ' keyand ' ' key.
1.0 INTRODUCTION
