Testo 6340 Data sheet

Differential Pressure Transmitter testo 6340

Ideal for cleanroom applications

∆P

testo 6340

2

testo 6340

testo 6340

Highest stability even at lowest pressures

Positive pressure at filling points helps to sustain
hygiene conditions when filling food and
pharmaceuticals

Negative pressure helps prevent the spread of germs
and dust particles in hospitals and research
laboratories, positive pressure secures operating
theatres.

Defined pressure differences between cleanroom and
adjoining rooms assure quality

Zero ppoint sstability pplays aa pparticularly

important rrole aat llowest ppressures ((10 PPa oor

50 PPa mmeasurement rrange).

While conventional ∆P transmitters require

frequent recalibration, the testo 6341/6343 is

equipped with

automatic zzero ppoint

adjustment

. The solenoid valves vent both

sides of the pressure measurement cell in an

hourly cycle. Consequently, the

microprocessor automatically corrects the

zero signal - highest stability is the result.

Supply air via HEPA-/ULPA

filter

Outlet air (50 to 500 air

exchanges / h)

Laminar flow
e.g. 0.5 m/s

Outer zone

Measurement

Adjustment

Critical zone

Normal zone

Critical zone

Normal zone

Whether ccleanroom, ggrayroom, ooperating

theatre oor ffilling ssystem:

Lowest differential pressures between the

different rooms or zones must be sustained in

order to avoid the in-flow of contaminated air.

Continuous measurement and control of

these low differential pressures are required

(according to ISO 14644: 5 to 20 Pa).

This must be proven annually in accordance

with

ISO 114644

-1/B (against zero potential

and against neighbouring rooms).