testo 338

www.testo.com

Data sheet

Mobile, robust portable measuring instrument

Automatic, direct display of the measurement results

Quick, easy operation

Data printout on site

Measuring instrument

for degree of blackening

testo 338 – mobile, direct-display

measuring instrument for proof of

quality on site.

With the handy testo 338, it is possible to take

measurements of the degree of blackening on industrial

diesel engines easily on site. The testo 338 is the first

mobile measuring instrument which calculates the degree

of blackening automatically and without further analysis

electronics, and shows it directly in the display as an FSN

(Filter Smoke Number) or optionally as a Bosch number or

as a soot concentration (mg/m³). Thanks to the wireless

data transfer via IrDA or Bluetooth

, the measurement

results can be transferred to other instruments or printed

out, and are thus immediately saved. The handy design

and the easy operation make the testo 338 a practical

one-hand measuring instrument for convenient and

fast measurements in production, commissioning and

maintenance of industrial diesel engines.

mg/m

FSN

testo 338

Subject to change without notice.

www.testo.com

1981 7024/msp/I/01.2018

Technical data / Accessories

testo 338 testo 338

testo 338, mobile measuring instrument for

degree of blackening, including gas sampling

probe, TopSafe, mains unit and instrument bag

testo 338, mobile measuring instrument for degree of blackening

with Bluetooth, including gas sampling probe, TopSafe, mains unit

and instrument bag

Part no. 0632 3381 Part no. 0632 3382

General technical data

Rech. battery Lithium ion

Battery life approx. 4 h cont. operation

Memory

Measurement period

Operating temperature

Protection class

Data interfaces

200 measurements

< 60 s per measurement cycle

+5 to +45 °C

IP 40, TopSafe

Flue gas temperature Individual measurements up to +500 °C

Positive pressure up to 300 mbar*

IrDA / optional Bluetooth

*in reference conditions 1000 mbar, +25 °C

Sensor types

Units

Measuring range

Resolution

FSN / Bosch number /

soot concentration (mg/m³)

FSN / Bosch number* 0 to 2.5

soot concentration 0 to 70 mg/m³

FSN / Bosch number* 0.01

soot concentration 0.01 mg/m³

Test sample volume 0.2 litres (range: 0.2 to 2 FSN)

0.4 litres (range: 0 to 0.3 FSN)

Flow-through

measurement

Differential pressure sensor

Optical sensor Opacity of the filter load in %

Repeatability FSN / Bosch number*:

< 0.08 FSN

Soot concentration

< 1.5 mg/m³ (0 to 5 mg/m³)

< 1.25 mg/m³ +5 % of m.v. (5 to 70 mg/m³)

*a higher measurement inaccuracy occurs at higher pressures

Part no.Included in set

0516 0002

0554 1096

0554 0549

0554 0568

0554 3334

0600 7570

0554 0208

0515 5107

Instrument bag for smoke tester

International mains unit

Testo fast printer IrDA with wireless

infrared interface; 1 roll thermal paper; 4

AA batteries

Spare thermal paper for printer, permanent

ink

Software „easyEmission“, incl. USB

connection cable instrument-PC

Gas sampling probe, penetration

depth 240 - 285 mm, hose 1.6 m

Heat protection for probe handle

Spare battery 2600 mA

Part no.Spare parts

0173 0147Heat protection shield for installation on

probe shaft

0554 1103Charger for spare battery testo 308 / testo

338 / testo 330-1/-2 LL

0554 1101

0554 0146

Spare particle filter (10 pcs.)

Spare filter paper

Part no.Accessories