Page 1
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
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• 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
Page 2
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
Page 3
+
-
+
-
+
-
+
-
+
-
CH1
CH2 CH3
24V
1
77
122
162
a
b
Differential pressure transmitters with high accuracy and long-term stabilty
Technical drawings
122 mm
7 mm
7
162 mm
testo 6351
Connection plan
Status 07.10.2009
Subject to change without notice.
tteessttoo
AG · Testo-Strasse 1 · D-79853 Lenzkirch · www.testo.com
Page 3/4
DS 6351 EN/msp/A/07.10.2009
Page 4
Differential pressure transmitters with high accuracy and long-term stabilty
The following options can be specified for the testo 6351:
testo 6351
AXX Messbereich
AXX Measuring range
BXX Analogausgang / Versorgung
BXX Analog display/supply
XX Display
XX Display / menu language
C
C
XX Gehäusefarbe
XX Cable input
E
D
XX Einheit
XX Ethernet
F
E
KXX Sprache der Bedienungsanleitung
FXX Differential pressure/flow velocity unit (pre-
set)
(für zweisprachige Papier-Bedienungs -
nleitung)
a
HXX Relay
KXX Instruction manual language
Example:
Order code for transmitter testo 6351 with
the following options:
- Measuring range 0 to 100 Pa
- Analog output / supply 0 to 5 V
(4-wire, 24 VAC/DC)
- with display/English
- Cable entry NPT 1/2“
- with Ethernet module
- Differential pressure mbar / min / max
- 4 relay outputs, limit value monitoring
- Instruction manual language
German/English
AXX Measuring range
A02 0 to 50 Pa
A03 0 to 100 Pa
A04 0 to 500 Pa
05 0 to 10 hPa
A
07 0 to 50 hPa
A
08 0 to 100 hPa
A
A09 0 to 500 hPa
A10 0 to 1000 hPa
A11 0 to 2000 hPa
A22 -50 to 50 Pa
23 -100 to 100 Pa
A
24 -500 to 500 Pa
A
A25 -10 to 10 hPa
A27 -50 to 50 hPa
A28 -100 to 100 hPa
A29 -500 to 500 hPa
A30 -1000 to 1000 hPa
31 -2000 to 2000 hPa
A
BXX Analog display/supply
B02 0 to 1 V (4-wire, 24 VAC/DC)
B03 0 to 5 V (4-wire, 24 VAC/DC)
B04 0 to 10 V (4-wire, 24 VAC/DC)
B05 0 to 20 mA (4-wire, 24 VAC/DC)
B06 4 to 20 mA (4-wire, 24 VAC/DC)
CXX Display / menu language
00 without display
C
C02 with display/English
C03 with display/German
C04 with display/French
C05 with display/Spanish
C06 with display/Italian
C07 with display/Japanese
C08 with display/Swedish
DXX Cable input
D01 Cable input M16 (relay: M20)
D02 Cable entry NPT 1/2“
D03 Cable contact via M-plug connection for signal
and supply
EXX Ethernet
E00 without Ethernet module
E01 with Ethernet module
XX Differential pressure/flow velocity unit (pre-
F
set)
F01 Pa / min / max
F02 hPa / min / max
F03 kPa / min / max
04 mbar / min / max
F
05 bar / min / max
F
06 mmH2O / min / max
F
F07 mmH2O / min / max
F08 inch HG / min / max
F09 kg/cm² / min / max
F10 PSI / min / max
11 m/s / min / max
F
12 ft/min / min / max
F
F13 m³/h / min / max
F14 l/min / min / max
F15 Nm³/h / min / max
F16 Nl/min / min / max
XX Relay
H
00 without relay
H
01 4 relay outputs, limit value monitoring
H
H02 4 relay outputs, channel 1 limit values and
collective alarm
KXX Instruction manual language
K01 German/English instruction manual
K02 French/English instruction manual
K03 Spanish/English instruction manual
K04 Italian/English instruction manual
K05 Dutch/English instruction manual
K06 Japanese/English instruction manual
K07 Chinese/English instruction manual
K08 Swedish/English instruction manual
0555 6351 A03 B03 C02 D02 E01 F04 H01 K01
Scaling: 50% of
measuring range
final value; freely
electable within
s
easuring range
m
Status 07.10.2009
Subject to change without notice.
tteessttoo
AG · Testo-Strasse 1 · D-79853 Lenzkirch · www.testo.com
Page 4/4DS 6351 EN/msp/A/07.10.2009
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