Testo 6351 Data sheet

Committing to the future

testo 6351

Differential pressure transmitters with high accuracy and long-term stabilty

SPECIFICATIONS

testo 6351

The differential pressure transmitter testo 6351 was
developed specially for monitoring differential pressure
in the measuring range from 50 Pa to 2000 hPa. In
cleanroom technology, the maintenance of positive
pressure prevents the entry of contaminated air. In
order to keep the cleanroom conditions constant, the
transmitter additionally calculates the parameters
volume flow and flow velocity from the measured
differential pressure.

Subject to change without notice.

SPECIFICATIONS

testo 6351

• Measurement of differential pressure, flow velocity
and volume flow

• Automatic zero-point adjustment guarantees high,
temperature-independent accuracy and long-term
stability

• Plastic housing

• Display with multi-language operating menu and
optical alarm display

• Ethernet, relay and analog outputs allow optimum
integration into individual automation systems

• Self-monitoring of the transmitter and early warning
function guarantee high system availablity

• The P2A software for parameterization, adjustment
and analysis saves time and costs in commissioning
and maintenance

The testo 6351 is particularly outstanding thanks to
the automatioc zero-point adjustment which ensures
high accuracy and long-term stability.

The integrated self-monitoring and early warning
function also guarantees the operator high system
availability.

Areas of application:

• Differential pressure monitoring between cleanrooms

• Differential pressure monitoring in filling processes

• Monitoring differential pressure, volume flow and
flow velocity in critical air conditioning technology
(VAC systems)

Status 07.10.2009

Page 1/4

• Scalability of ±50 percent of the measuring range
final value and free scalability within the measuring
range

• Configurable alarm management with adjustable
response delay and alarm acknowledgement

tteessttoo

AG · Testo-Strasse 1 · D-79853 Lenzkirch · www.testo.com

DS 6351 EN/msp/A/07.10.2009

Differential pressure transmitters with high accuracy and long-term stabilty

Technical data

testo 6351

Parameters

ifferential pressure

D

easuring range 0 to 50 Pa

M

Measurement uncertainty* ±0,8% of measurement range final value

Selectable units Differential pressure in Pa, hPa, kPa,

Sensor Piezoresistive sensor

Autom. Zero-point
adjustment

Overload capacity

* Measurement inaccuracy according to GUM: ±0.8% of measurement range final
value ±0.3 Pa

GG

uide to the Expression of UUncertainty in MMeasurement):

GUM (
ISO guideline for the determination of measurement inaccuracy, in order to make
measurements comparable worldwide.
The following inaccuracies are used for the determination:
– Hysteresis
– Linearity
– Reproducibility
– Long-term stability
– Adjustment site/factory calibration
– Test site

to 100 Pa

0
0 to 500 Pa
0 to 10 hPa
0 to 50 hPa

to 100 hPa

0

to 500 hPa

0

to 1000 hPa

0

to 2000 hPa

0

±0.3 Pa
Temperature gain drift: 0.02% of
measuring range per Kelvin deviaton

rom nominal temperature 22 °C

f

ero point drift: 0% (thanks to cyclic

Z
zero-point adjustment)

mbar, bar, mmH

G, inch H

H

alculated variables: Volume flow in

C

3

m

low velocity in m/s, ft/min

F

via magnetic valve
Frequency adjustable: 15 sec, 30
sec, 1 min, 5 min, 10 min

MMeeaassuurriinngg rraannggee OOvveerrllooaadd

0 to 50 Pa 20000 Pa
0 to 100 Pa 20000 Pa
0 to. 500 Pa 20000 Pa
0 to 10 hPa 200 hPa
0 to 50 hPa 750 hPa
0 to 100 hPa 750 hPa
0 to 500 hPa 2500 hPa
0 to 1000 hPa 2500 hPa
0 to 2000 hPa 2500 hPa

-50 to 50 Pa 20000 Pa

-100 to 100 Pa 20000 Pa

-500 to 500 Pa 20000 Pa

-10 to. 10 hPa 200 hPa

-50 to 50 hPa 750 hPa

-100 to 100 hPa 750 hPa

-500 to 500 hPa 2500 hPa

-1000 to 1000 hPa 2500 hPa

-2000 to 2000 hPa 2500 hPa

2

h, l/min, Nm

/

O

50 to 50 Pa

­100 to 100 Pa

-

-500 to 500 Pa

-10 to 10 hPa

-50 to 50 hPa
100 to 100 hPa

­500 to 500 hPa

­1000 to 1000 hPa

­2000 to 2000 hPa

-

O, kg/cm2, PSI, inch

2

3

h, Nl/min

/

Inputs/outputs

nalog outputs

A

uantity 1

Q

Output type 0/4 to 20 mA (4-wire) (24 VAC/DC)

caling Differential pressure: scalable ±50% of

S

Meas. cycle 1/sec

Resolution 12 bit

Max. load max. 500 Ω

Other outputs

Ethernet Optional with Ethernet module

elay Optional: 4 relays (free allocation to

R

igital Mini-DIN for P2A software

D

Supply

oltage supply 20 to 30 VAC/DC, 300 mA current

V

eneral technical data

G

Model

Material Plastic housing

Dimensions 162 x 122 x 77 mm

Weight 0.7 kg; optional: Ethernet intermediary

Display

Display Optional: 3-line LCD with

Resolution

Miscellaneous

Protection class IP 65

EMC EU guideline 2004/108/EC

to 1/5 to 10 V (4-wire) (24 VAC/DC)

0

measuring range final value;
freely scalable within measuring range

measurement channels or as collective
alarm in operating menu/P2A), up to
250 VAC/3A (NO or NC)

consumption, galvanically separate

ignal and supply line

s

layer 0.6 kg

multi-language operating menu

MMeeaassuurriinngg rraannggee RReessoolluuttiioonn

0 to 50 Pa 0,1 Pa
0 to 100 Pa 0,1 Pa
0 to 500 Pa 0,1 Pa
0 to 10 hPa 0,01 hPa
0 to 50 hPa 0,01 hPa
0 to 100 hPa 0,1 hPa
0 to 500 hPa 0,1 hPa
0 to 1000 hPa 1 hPa
0 to 2000 hPa 1 hPa

-50 to 50 Pa 0,1 Pa

-100 to 100 Pa 0,1 Pa

-500 to 500 Pa 0,1 Pa

-10 to 10 hPa 0,01 hPa

-50 to 50 hPa 0,01 hPa

-100 to 100 hPa 0,1 hPa

-500 to 500 hPa 0,1 hPa

-1000 to 1000 hPa 1 hPa

-2000 to 2000 hPa 1 hPa

Status 07.10.2009

Page 2/4

Subject to change without notice.

tteessttoo

AG · Testo-Strasse 1 · D-79853 Lenzkirch · www.testo.com

Operating conditions

display

Operating temperatureWith / without

Storage temperature -20 to +60 °C / -4 to +140 °F

Process temperature -20 to +65 °C / -4 to +149 °F

-5 to +50 °C / +23 to +122 °F

DS 6351 EN/msp/A/07.10.2009