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testo 320

Technical data

We measure it.

General technical data

Storage temperature -20 to +50 °C

Operating temperature -5 to +45 °C

Power supply

Battery: 3.7 V / 2,400 mAh

Mains unit: 6 V / 1.2 A

Memory

500 measurement values

Display

Colour graphic display 240 x 320 pixels

Weight

573 g

Dimensions

240 x 85 x 65 mm

Warranty

Instrument/probe/gas sensors: 24 months

Battery: 12 months

Measuring range Accuracy ±1 digit

Resolution

Temperature

-40 to +1200 °C

±0.5 °C (0 to +100.0 °C)

±0.5 % of m.v. (remaining range)

0.1 °C (-40 to +999,9 °C)

1 °C (> +1000 °C)

Adjustment time

t

90

Draught

measurement

-9.99 to +40 hPa

±0.02 hPa or ±5% of m.v. (-0.50 to +0.60 hPa)

±0.03 hPa (+0.61 to +3.00 hPa)

±1.5% of m.v. (+3.01 to +40.00 hPa)

0.01 hPa

with fine draught option

0.001 hPa

Pressure

measurement

0 to +300 hPa

±0.5 hPa (0.0 to 50.0 hPa)

±1% of m.v. (50.1 to 100.0 hPa)

±1.5 % of m.v. (remaining range)

0.1 hPa

with fine draught option

0.01 hPa

O

2

measurement

0 to 21 Vol. % ±0.2 Vol. %

0.1 Vol. %

˂

20 s

CO measurement

(without

H

2

-compensation)

0 to 4000 ppm

±20 ppm (0 to 400 ppm)

±5% of m.v. (401 to 2000 ppm)

±10% of m.v. (2001 to 4000 ppm)

1 ppm

˂

60 s

CO measurement

(H

2

-compensated)

0 to 8000 ppm

±10 ppm or ±10% of m.v. (0 to 200 ppm)

±20 ppm or ±5% of m.v. (201 to 2000 ppm)

±10% of m.v. (2001 to 8000 ppm)

1 ppm

˂

40 s

Determination of degree

of effectivity (Eta)

0 to 120%

0.1%

Flue gas loss

0 to 99.9%

0.1%

CO

2

determination

digital calculation from O

2

±0.2 Vol. %

0.1 Vol. %

Option CO

low

measurement

(H

2

-compensated)

0 to 500 ppm

±2 ppm (0 to 39.9 ppm)

±5% of m.v. (remaining range)

0.1 ppm

˂

40 s

˂

40 s

Ambient CO

measurement (with

CO probe)

0 to 500 ppm

±5 ppm (0 to 100 ppm)

±5% of m.v. (> 100 ppm)

1 ppm

Gas leak

measurement for

flammable gases

(with gas leak

detection probe)

Ambient CO

2

measurement (with

ambient CO

2

probe)

0 to 1 Vol. %

0 to 10.000 ppm

±50 ppm or ±2% of m.v. (0 to 5000 ppm)

±100 ppm or ±3% of m.v. (5001 to 10000 ppm)

Differential

pressure, flow

velocity and

temperature via fine

pressure probe

±10.000 Pa

0.15 to 3 m/s

max. -40 to +1,200 °C

(dependent on probe)

±0.3 Pa (0 to 9.99 Pa) plus ±1 Digit

±3% of m.v. (10 to 10.000 Pa) plus ±1 Digit

±0.5 °C (-40 to 100 °C)

±0.5 % of m.v. (rem. measuring range)

plus probe accuracy

0.1 m/s

0.1 °C

Display range

0 to CO

2

max

Display range

0 to 10.000 ppm

CH

4

/ C

3

H

8

Signal

optical display (LED)

audible signal via buzzer

˂

2 s