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).
3
testo 6340 – Product features
The testo 6340 product line
testo 6341:
0 to 10 Pa, with automatic zero point
adjustment, without display
testo 6342:
0 to 50 Pa, without display
testo 6343:
0 to 10 Pa, with automatic zero point
adjustment, with display
testo 6344:
0 to 50 Pa, with display
testo 66341 aand 66343 –– TThe hhigh eend ssolution
among tthe llow ∆P ttransmitters
•
Zero ppoint ddrift == 00
on account of automatic zeroing
• High long-term stability and reproducibility
•
No ttemperature ddependency:
The automatic zeroing is
performed at process temperature.
•
Overload-pproof
(if \>140 % of the measurement range is
applied, the solenoid valves close; the cell is vented on both
sides)
• Optional display (testo 6343)
testo 66342 aand 66344 –– tthe rreliable ttransmitters
among tthe llow ∆P ttransmitters
•
Very llow zzero ppoint ddrift
as well as very good long-term
stability and reproducibility thanks to the optimised
measurement cell
•
Very llow ttemperature ddependency
(temperature
compensated measurement cell)
• Optional display (testo 6344)
testo 66349 –– tthe vvariants oof tthe aabove ddescribed ttypes
Measurement ranges up to +/- 1000 mbar, other pressure and cable connections as well as (in testo 6341/43) a RS 232 digital output
and a metallic housing are available based on the testo 6341 to 6344 instruments
Patented iinductive mmeasurement ccell
The patented differential pressure
measurement cell in the testo 6340
transmitter operates with highest stability. A
core, with a magnetic coating on both sides,
is located in the middle of the concentrically
undulating copper beryllium membrane. Any
deflection causes sensitive changes in the
inductances of both coils L1 and L2.
Coil L 1
Coil L 2
Pressure connection P1
Pressure connection P2
Core with magnetic coating on both
sides
Copper beryllium membrane
testo 6342
testo 6344
testo 6341/6343
testo 6340
Technical data
Model testo 6341/6343 testo 6342/6344
Item Part no.
Display Only with testo 6343 Only with testo 6344
Meas. range 0 to 10 Pa (= 0,1 mbar/0,04 inch H
2
O) 0 to 50 Pa (= 0,5 mbar/0,02 inch H2O)
Meas. range on request 10 Pa to +/-100 kPa (i.e. up to 1000 mbar) 50 Pa to +/-100 kPa (i.e. 1000 mbar)
Housing (ABS plastic) 6341: 120 x 122 x 85 mm 6342: 80 x 120 x 73 mm
6343: 120 x 122 x 105 mm 6344:120 x 122 x 75 mm
Measurement inaccuracy 0,35 Pa + 0,5% of mv 0,35 Pa + 0,6% of mv
(0.3 Pa = meas. inaccuracy of reference) (0.3 Pa = meas. inaccuracy of reference)
Protection class IP54 standard (plastic housing)
IP65 on request (metal housing)
IP54 Standard (plastic housing)
Output signal 4 to 20 mA (load max. 500 Ohm)
0 to 20 mA/0 to 10 V can be adjusted locally;
RS232 on request
4 to 20 mA (load max. 500 Ohm)
Usable measurement range -5% to +110 % of fsv
Overload 200 times (above 25 mbar: 6 bar) 10 times (above 200 mbar: 2 times)
Zero point drift None (automatic zero point adjustment) 0.5 % of full scale value/year
Hysteresis 0,1% of fsv 0,1% of fsv
Power supply 24 VDC (20,5 to 28,5 VDC) 24 VDC (20,5 to 28,5 VDC)
Time constants 0/1/2.5/5/10/20/30/40 s can be adjusted
Oper. temp. 0 to +60 °C 0 to +60 °C
Storage temp. -10 to +70 °C -10 to +70 °C
Cable screw connections 2 x PG9 2 x PG7
Pressure connections 2 x d 6.5 for houses ø 4 or 5 mm 2 x d 6.5 for houses ø 4 or 5 mm
Weight
0555 6341
1500 g 6342: 300 g , 6344: 800 g
Output signal Linear to differential pressure Linear to differential pressure
Measuring medium Air, non-aggressive gases Air, non-aggressive gases
Ordering data
To :
Power supply unit (DIN rail
mounting) 90 to
264VAC/24VDC (3A)
(0554 1749)
4...20 mA
24 VDC
To the
process
5 metre silicone hose, 4 mm inner
diameter, 1.5 mm wall thickness
can withstand load up to 700 mbar
(0554 0440)
or
230 VAC
AALLAARRMM
with alarm unit
DDIISSPPLLAAYY AANNDD SSWWIITTCCHH
testo 54 - 2 AC (5400.7553)
Option LCD
(nur testo 6343)
0555 6342
0555 6343
0555 6344
ISO calibration with 5 points (0/25/50/75/100/0 % of full scale value) 0520 0005
5 metre silicone hose, 4 mm inner diameter, 1.5 mm wall thickness
can withstand load up to 700 mbar
0554 0440
External testo 54 – 2 AC display,2 relay outputs (up to 300 VAC, 3 A), 230 VAC 5400 7553
Power supply unit (desk-top) 90 to 264VAC/24VDC (350mA) 0554 1748
Power supply unit (DIN rail mounting) 90 to 264VAC/24VDC (3A) 0554 1749
ISO calibration with 5 points (0/25/50/75/100/0 % of full scale value) 0520 0105
Subject to change without notice.
Can be set by factory if required
-5% to +105 % of fsv
Technical Data – Ordering Data
testo 6341 ∆P transmitter 0 to 10 Pa, automatic zeroing, without display
testo 6342 ∆P transmitter 0 to 50 Pa, without display
testo 6343 ∆P transmitter 0 to 10 Pa, automatic zeroing, with display
testo 6344 ∆P transmitter 0 to 50 Pa, with display
Loading...