testo 350 Emission Analyzer Definitions

Analyzer Box
Condensate Trap
Control Unit
Dilution System
Excess Air (ExA)
Function Keys
Hydrogen Compensated CO Sensor
Flow and Mass Flow
Non-Heated Sample Line (testo Patented) (NO2/SO2-Hose)
O2 Reference
Pellister (CxHy Sensor)
Peltier Cooler
Pitot Tube
Power / Battery / AC Operation
testo-Databus
Trigger Input / Switch
Upgrade Module

Analyzer Box
The testo 350 Analyzer Box is manufactured using superior rugged construction and is where measurements begin. The analyzer box contains the pumps, sample conditioning, electronics, and up to six sensors. Thermoelectric (peltier) chiller (optional) conditions the gas as required by regulatory agencies. Protection is critical for the 350's analyzer box, as it has rubber bumpers and components mounted in shock-resistant material.
Condensate Trap
The condensate trap is a clear acrylic container located on the side of the Analyzer Box that serves as a reservoir for condensate. The condensate water can be removed by 1) opening the plug, attaching a hose to the drain port, or by removing the condensate trap. Remove the trap by pulling the trap away from the analyzer and drain by shaking the trap.
Control Unit
The hand-held Control Unit is small in size, but big in capability. It is the interface used to operate the Analyzer Box and provides a multitude of field configurations so testing is faster to set up and easier to perform. The control unit can work docked or remotely via Bluetooth or hard-wire connection..
Dilution System
A system that expands the range of the CO sensor by introducing a specific volume of "dilution air" through a precision valve assembly. The dilution system exclusively operates with the CO sensor. Dilution factors (1, 2, 5, 10, 20 or 40) are selected by the user by pushing a function button. The values are automatically calculated based upon the factor. The benefits of the dilution system include:
 

• Testing high-concentration CO sources without over-ranging and
  damaging the CO sensor.
   
  
• Protecting and extending sensor life.
   
  
• Eliminating the need for multiple sensor with multiple ranges
  therefore minimizing the cost-of-ownership.
   
  

An additional "Overall Dilution System" is also available at the touch of a button. It extends the range of all sensors (except O2 and CH) by a factor of 5x. Excess Air (ExA)
A calculated value that determines the amount of "extra" oxygen in a typical burner / boiler application. The analyzer will display a percentage of oxygen above the "perfect" (or stoichiometric) condition for complete combustion. In general, excess air dilutes and cools the combustion process, it absorbs the energy (heat), and reduces the efficiency of the combustion process
Function Keys
Three round orange buttons located directly below the display of the Control Unit. Each user-defined function key provides a shortcut to important analyzer functions.
Hydrogen Compensated CO Sensor
A standard electrochemical CO sensor will show a response to Hydrogen. Hydrogen can be in high concentration when excess air is low.
Flow and Mass Flow
The testo 350 measuring system can determine flow, velocity, and mass flow by a variety of methods. In combustion sources, the differential pressure sensor and a pitot tube is the standard method. The pitot tube can be exposed to the harsh environment in a stack. Input variable such as: pitot factor, stack diameter, absolute pressure, humidity and the analyzer will automatically calculate mass flow in lb/hr, ton/year, and so on.
Non-Heated Sample Line (testo Patented) (NO2/SO2-Hose)
Testo's non-heated sample line provides the sampling performance that is equivalent to a reference-level heated sample line. By incorporating high velocity sample transport through a patented PTFE inner hose, minimized surface area, reduced residence time, and unique self-cleaning abilities, this technology eliminates the cost and bulk of heated sample lines.
O2 Reference
A concentration value that is reported in relation to a know reference. Regulatory authorities, engineering studies or other standard reporting may required a gas species (i.e. NOx or CO) to be reported to a specific O2 reference. This provides a method of comparing emission rates on an equivalent basis. For reporting, it eliminates the variability of having extra or deficient oxygen in a combustion system.
Peltier Cooler
The testo 350 is equipped with a "Peltier" principle sample gas. An electric current flows through the interface surface of two different metals thereby cooling one side and heating the other. The hot wet sample gas is exposed to the cold side element. This cooling process condenses the moisture thereby drying the sample.
Pitot Tube
A pitot tube is a device that uses a two tubes that are configured to measure pressure thereby permitting the calculation for flow velocity. The testo 350 utilizes pressure sensors that measure the dynamic and static pressure through the pitot tube configuration. By entering either manual or measured input parameters (i.e. temperature, humidity, pitot factor, etc.) flow velocity is automatically calculated. With the testo straight and standard "L" shaped Pitot tubes, nearly any application can be measured.
Power / Battery / AC Operation
The testo 350 Analyzer Box operates with AC power or through the battery pack for up to 2.5 to 4 hours. Additional battery packs can be swapped out and connected as needed.

Sensor Upgrade Model
An upgrade module is a measuring sensor that contains the original release information in order for the analyzer to measure a specific parameter. Once a module is installed in an analyzer it cannot be used again to upgrade additional analyzers, however, it can be used as a replacement or spare sensor.
 
Note: A replacement sensor will not operate unless the original module (for that specific parameter) was install in that specific analyzer.

testo-Databus
A databus system is integrated into every testo 350. It permits two-way communication (data transfer and function) through multiple devices (i.e. multiple analyzer boxes connected to analog output boxes connected to logger boxes, etc.). The maximum distances from end to finish is 3,000 feet. The testo-Databus can be used a few different ways:
 

• One Control Unit, as the master control, in a serial system where each device
  can be operated simultaneously but displayed individually by scrolling through
  the display on the control unit display.
   
  
• Via CAN Bus or PCMCIA-Card as a parallel system where you can see and
  operate up to 16 Analyzer Boxes at one time (e.g. for simultaneous reading
  of NOx on one computer screen).
   
  
• The CAN Bus/PCMCIA-Card (Personal Computer Memory Card International
  Association) enables the Analyzer Box to be operated without the Control Unit.
  With this configuration, multiple analyzers can be connected in a bus system
  (maximum of 16 analyzer boxes) and specific parameters can be assigned and
  displayed on a single screen as a graph or table, etc. It is a unique system
  and especially useful for: SCR balancing, Catalyst efficiency testing and
  research, and remote monitoring.

Trigger Input / Switch
The testo 350 Analyzer Box has a socket that accepts a command (electrical signal) that will start a pre-configured automatic program. An external device can "trigger" the analyzer to start and stop sampling and monitoring (i.e. flip of a relay after exceeding a set limit).