testo 320

Order-Nr.  0563 3220 76

Product Description

Are you looking for a multi-function instrument for efficient flue gas analysis? Which confidently solves every task on a heating system? And is still convenient to use? The new testo 320 fulfils all of these requirements, because that is exactly what it was developed for. The testo 320 has a high-resolution colour display which presents the measurement results graphically. It provides simple, self-explanatory measurement menus. The testo 320 is very robust, ergonomic, and at the same time aesthetically designed. It has two sensors for O2 and CO as well as a temperature probe integrated into the flue gas probe for the direct measurement of temperature, O2 and CO. From these data, the instrument calculates all relevant flue gas measurement parameters such as CO2 value, degree of effectivity and flue gas loss. Direct draught or pressure measurements are additionally possible. Using the fine pressure probe, the flue draught or gas pressure values can optionally be measured parallel to the flue gas measurement.
- TÜV-tested according to EN 50379, Parts 1-3.

Applications:
- Flue gas measurement
- Draught measurement
- Gas flow and static gas pressure
- Gas leak detection
- Ambient CO measurement
- Differential temperature measurement

 

General technical data

Weight

573 g

Dimensions

240 x 85 x 65 mm

Operating temperature

-5 to +45 °C

Display size

240 x 320 pixels

Display function

Colour graphic display

Power supply

Battery: 3.7 V / 2,400 mAh; Mains unit: 6 V / 1.2 A

Maximum memory

500 Measurement values

Storage temperature

-20 to +50 °C

Differential Pressure - Piezoresistive

Measuring range

±10000 Pa

Accuracy

±0.3 Pa (0 to 9.99 Pa) plus ±1 Digit

±3 % of mv (10 to 10000 Pa) plus ±1 Digit

Flue gas CO (with H₂-compensation)

Measuring range

0 to 8000 ppm

Accuracy

±10 ppm or ±10 % of mv (0 to 200 ppm)

±20 ppm or ±5 % of mv (201 to 2000 ppm)

±10 % of mv (2001 to 8000 ppm)

Resolution

1 {#0} ppm

Reaction time t₉₀

< 40 s

Flue gas COlow (with H₂-compensation)

Measuring range

0 to 500 ppm

Accuracy

±2 ppm (0 to 39.9 ppm)

±5 % of mv (40 to 500 ppm)

Resolution

0.1 {#0} ppm

Reaction time t₉₀

< 40 s

Differential Pressure flue gas Draught - Piezoresistive

Measuring range

-9.99 to +40 hPa

Accuracy

±0.02 hPa or ±5 % of mv (-0.50 to +0.60 hPa)

±0.03 hPa (+0.61 to +3.00 hPa)

±1.5 % of mv (+3.01 to +40.00 hPa)

Resolution

0.01 hPa t3 0.001 hPa

Temperature

Measuring range

-40 to +1200 °C

Accuracy

±0.5 °C (0 to +100.0 °C)

±0.5 % of mv (Remaining Range)

Resolution

0.1 °C (-40 to +999.9 °C)

1 °C (> +1000 °C)

Flue gas degree of effectivity, Eta (calculated)

Measuring range

0 to 120 %

Resolution

0.1 %

Flue gas loss (calculated)

Measuring range

0 to 99.9 %

Resolution

0.1 %

Flue gas CO₂ calculation (calculated from O₂)

Measuring range

Display range 0 to CO₂ max

Accuracy

±0.2 Vol.%

Resolution

0.1 Vol.%

Reaction time t₉₀

< 40 s

Velocity / Volume flow

Measuring range

0.15 to 3 m/s

Resolution

0.1 m/s

Pressure measurement

Measuring range

0 to +300 hPa

Accuracy

±0.5 hPa (0.0 to 50.0 hPa)

±1 % of mv (50.1 to 100.0 hPa)

±1.5 % of mv (Remaining Range)

Resolution

0.1 hPa t3 0.01 hPa

Flue gas CO (without H₂-compensation)

Measuring range

0 to 4000 ppm

Accuracy

±20 ppm (0 to 400 ppm)

±5 % of mv (401 to 2000 ppm)

±10 % of mv (2001 to 4000 ppm)

Resolution

1 ppm

Reaction time t₉₀

< 60 s

Ambient CO

Measuring range

0 to 500 ppm

Accuracy

±5 ppm (0 to 100 ppm)

±5 % of mv (> 100 ppm)

Resolution

1 ppm

Ambient CO₂

Measuring range

0 to 1 Vol.%

0 to 10000 ppm

Accuracy

±50 ppm or ±2 % of mv (0 to 5000 ppm)

±100 ppm or ±3 % of mv (5001 to 10000 ppm)

Gas leak measurement for combustible gases (via gas leak detection probe)

Measuring range

0 to 10000 ppm CH₄ / C₃H₈; Display range

Accuracy

Signal optical display (LED) audible signal via buzzer

Reaction time t₉₀

< 2 s

with gas leak detection probe

Temperature (via the fine pressure probe)

Measuring range

-40 to +120 °C max. (dependent on probe)

Accuracy

±0.5 °C (-40 to 100 °C)

±0.5 % of mv (Remaining Range) plus probe accuracy

Resolution

0.1 °C

Ambient CO measurement in the heated environment

Carbon monoxide (CO) is a colourless, odourless and taste-free gas, but also poisonous. It is produced during the incomplete combustion of substances containing carbon (oil, gas, and solid fuels, etc.). If CO manages to get into the bloodstream through the lungs, it combines with haemoglobin thus preventing oxygen from being transported in the blood; this in turn will result in death through suffocation. This is why it is necessary to regularly check CO emissions at the combustion points of heating systems and the surroundings.

Measuring the flue gas parameters of the burner (CO, O2, and temperature, etc.)

The flue gas measurement for a heating system helps to establish the pollutants released with the flue gas (e.g. carbon monoxide CO or carbon dioxide CO2) and the heating energy lost with the warm flue gas. In some countries, flue gas measurement is a legal requirement. It primarily has two objectives:

  1. Ensuring the atmosphere is contaminated as little as possible by pollutants; and
  2. energy is used as efficiently as possible.

Stipulated pollutant quantities per flue gas volume and energy losses must never be exceeded. Measurement in terms of results required by law takes place during standard operation (every performance primarily using the appliance). Using a Lambda probe (single hole or multi-hole probe), the measurement is taken at the centre of flow in the connecting pipe (in the centre of the pipe cross-section, not at the edge) between the boiler and chimney/flue. The measured values are recorded by the flue gas analyzer and can be logged either for print out or transfer to a PC at a later stage.

Measurement is taken by the installer at commissioning, and if necessary four weeks later by the flue gas inspector/chimney sweep, and then at regular intervals by the authorised service engineer.

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