Testo 6351 Operating Manual
testo 6351 · differential pressure transmitter
P2A software · Parameterizing, adjusting and analyzing
software
Instruction manual
2
1 Safety and the environment
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1 Safety and the environment
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Avoiding electrical hazards
> Never use the instrument and connected probes to measure on
or near live parts!
> Damaged mains cables must only be replaced by authorized
personnel.
> Only have the transmitter wired and connected by authorized
personnel with the voltage disconnected.
> You must always comply with the regulations applicable in your
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country for opening and repairing electrical equipment.
Avoiding personal injury and damage to equipment
> Installation, setting and calibration work must only be carried
out by qualified and authorized personnel!
> Only open the instrument when this is expressly described in
the instruction manual for installation, maintenance or repair
purposes.
> Observe the permissible storage, transport and operating
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temperature.
> Do not store the product together with solvents. Do not use any
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desiccants.
> Do not use the instrument for control purposes at the same time
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as operating or servicing the transmitter.
> Only operate the product properly, for its intended purpose and
within the parameters specified in the technical data. Do not
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use any force.
> Carry out only the maintenance and repair work on this
instrument that is described in the documentation. Follow the
prescribed steps exactly. Use only original spare parts from
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Testo.
Any additional work must only be carried out by authorized
personnel. Otherwise testo will not accept any responsibility for the
proper functioning of the instrument after repair and for the validity
of certifications.
3
2 About this document
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Protecting the environment
> At the end of its useful life, send the product to the separate
collection for electric and electronic devices (observe local
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2 About this document
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regulations) or return the product to Testo for disposal.
Use
> Please read this documentation through carefully and
familiarize yourself with the product before putting it to use. Pay
particular attention to the safety instructions and warning advice
in order to prevent injuries and damage to the products.
> Keep this document to hand so that you can refer to it when
necessary.
> Hand this documentation on to any subsequent users of the
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product.
WARNING
CAUTION
Indicates potential serious injuries
indicates potential minor injuries
Symbols and writing standards
Representa-
Explanation
tion
Note: Basic or further information.
1. ...
2. ...
Action: more steps, the sequence must be
followed.
> ... Action: a step or an optional step.
- ... Result of an action.
Menu
[OK]
Elements of the program interface.
Buttons of the program interface.
... | ... Functions/paths within a menu.
“...” Example entries
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4
3 Contents
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3 Contents
1 Safety and the environment....................................................................3
2 About this document...............................................................................4
3 Contents...................................................................................................5
4 Transmitter...............................................................................................8
4.1. Specifications ..................................................................................8
4.1.1. Functions and use ...........................................................................................8
4.1.2. Scope of delivery .............................................................................................8
4.1.3. Accessories .....................................................................................................8
4.1.4. Technical data .................................................................................................9
4.1.5. Dimensions....................................................................................................12
4.2. Product description........................................................................13
4.2.1. At a glance.....................................................................................................13
4.2.2. Display and keypad........................................................................................14
4.2.3. Service interface............................................................................................15
4.2.4. Relay board (option) ......................................................................................15
4.2.5. Analog outputs...............................................................................................15
4.2.6. Parameters....................................................................................................15
4.2.7. Scaling .........................................................................................................16
4.2.8. Alarm handling...............................................................................................17
4.3. Commissioning..............................................................................18
4.3.1. Assembling the instrument.............................................................................18
4.3.1.1. Wall mounting ...................................................................................18
4.3.2. Connecting the instrument.............................................................................19
4.3.2.1. Overview of terminals........................................................................21
4.3.2.2. Connecting voltage supply and analog outputs.................................22
4.3.2.3. Connecting the relay outputs............................................................23
4.3.2.4. Plug-in connection option..................................................................26
4.3.2.5. Closing the instrument......................................................................27
4.3.3. Adjusting the instrument ................................................................................29
4.3.3.1. Analog output adjustment.................................................................29
4.3.3.2. n-point adjustment............................................................................30
4.4. Operation.......................................................................................31
4.4.1. Relationship between user menu and mini-DIN socket is active....................31
4.4.2. Key cover.......................................................................................................31
4.4.3. Password protection ......................................................................................32
4.4.4. Structure of user menu ..................................................................................32
4.4.5. Overview of the testo 6351 user menu...........................................................34
4.4.6. The individual main menus ............................................................................37
4.4.6.1. Editing main menu of channel 1........................................................37
4.4.6.2. Editing Main Menu Alarm..................................................................37
4.4.6.3. Editing Main Menu Settings ..............................................................39
5
3 Contents
4.4.6.4. Editing Main Menu Analysis..............................................................42
4.4.6.5. Editing Message main menu.............................................................44
4.4.6.6. Calling up Main Menu Ident..............................................................45
4.4.6.7. Editing Main Menu Adjust.................................................................45
4.4.6.8. Editing Reset main menu..................................................................47
4.5. Status, warning and error messages ............................................47
4.5.1. Status messages...........................................................................................48
4.5.2. Warning messages........................................................................................49
4.5.3. Transmitter error messages...........................................................................50
4.5.4. Handling alarm messages .............................................................................50
4.5.5. Namur fault conditions...................................................................................51
4.6. Maintenance and cleaning............................................................52
4.6.1. Maintaining the instrument............................................................................. 52
4.6.2. Cleaning the instrument.................................................................................52
5 Parameterizing, adjusting and analyzing software (P2A software) . . 53
5.1. Specifications................................................................................53
5.1.1. Functions and use .........................................................................................53
5.1.2. System requirements..................................................................................... 54
5.1.3. Scope of delivery...........................................................................................54
5.2. First steps ..................................................................................... 55
5.2.1. Installing the software/driver.......................................................................... 55
5.2.1.1. Installing P2A software.....................................................................55
5.2.1.2. Installing USB driver.........................................................................55
5.2.1.3. P2A software upgrade......................................................................55
5.2.2. Starting the software......................................................................................55
5.2.2.1. Starting the program......................................................................... 55
5.2.2.2. Establishing a connection wi th the instrument...................................55
5.2.2.3. Activating the connection w ith the instrument...................................56
5.3. Using the software........................................................................56
5.3.1. User interface................................................................................................56
5.3.2. Editing instrument/parameter file ...................................................................59
5.3.2.1. Changing instrument/parameter file..................................................59
5.3.2.2. Saving parameters............................................................................66
5.3.2.3. Opening the parameter file............................................................... 67
5.3.2.4. Copying and pasting parameters......................................................67
5.3.2.5. Deleting instrument/parameter file....................................................68
5.3.2.6. Creating a new instrument file...........................................................68
5.3.3. Analyzing/testing the transmitter....................................................................68
5.3.3.1. Analyzing/testing the instrument....................................................... 68
5.3.3.2. Carrying out factory reset..................................................................69
5.3.3.3. Testing analog output.......................................................................69
5.3.3.4. Testing switch outpu t relays 1 to 4....................................................71
5.3.3.5. Displaying min./max. values..............................................................72
5.3.4. Adjusting the transmitter................................................................................73
5.3.4.1. n-point adjustment............................................................................73
5.3.4.2. Adjusting the analog output.............................................................. 74
6
3 Contents
5.3.5. Transmitter history.........................................................................................75
6 Tips and assistance...............................................................................79
6.1. Questions and answers.................................................................79
6.2. Accessories and spare parts .........................................................79
6.2.1. Ordering options for testo 6351 transmitter (0555 6351)................................80
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7
4 Transmitter
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4 Transmitter
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4.1. Specifications
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4.1.1. Functions and use
The testo 6351 transmitter is suitable for the following applications,
amongst others:
• Test benches
• Clean rooms
• Filling processes
• Complex room climate applications
• Monitoring flow velocities or volumetric flow rates in air
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conditioning systems
4.1.2. Scope of delivery
The scope of delivery of the testo 6351 transmitter includes the
following:
• Key cover
• Rear panel bracket
• Instruction manual
• Calibration report
• CD-ROM with operating instructions (PDF), configuration files
for Ethernet module and P2A update (this can only be used in
conjunction with the P2A software, which has to be ordered
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separately).
4.1.3. Accessories
The following accessories are available for the testo 6351
transmitter, amongst others:
• Mains unit
• P2A software (parameterizing, adjusting and analyzing
software)
8
• Assembly accessories
Information about accessories and their order numbers can
be found in Accessories and spare parts or on the
website at www.testo.com.
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4.1.4. Technical data
Parameter
• Differential pressure
4 Transmitter
Accuracy
The specifications are only valid if the positive pressure is
• ±0.8 % of measuring range final value, additional ±0.3 Pa
• T
applied at the positive pressure connection.
intrinsic error
K slope drift
1
= 0.03 % of measuring range per degree Kelvin of
deviation from nominal temperature 22 °C
• T
K zeroing drift
= 0 %, as zeroing with solenoid valve2
Measuring range, resolution and overload
Measuring range
Resolution Overload
depending on
resolution ordered
0 to 50 Pa 0.1 Pa 20,000 Pa
0 to 100 Pa 0.1 Pa 20,000 Pa
0 to 500 Pa 0.1 Pa 20,000 Pa
0 to 10 hPa 0.01 hPa 200 hPa
0 to 50 hPa 0.01 hPa 750 hPa
0 to 100 hPa 0.1 hPa 750 hPa
1
Measuring uncertainty in accordance with GUM: ±0.8 % of measuring range
final value ±0.3 Pa.
GUM (Guide to the Expression of Uncertainty in Measurement): ISO guideline for determining the
measuring uncertainty in order to render global measurement results comparable.
The following uncertainties are used during the inquiry:
• Hysteresis
• Linearity
• Reproducibility
• Adjustment area/factory calibration
2
Minor mixtures of the media may occur at the positive and negative pressure
• Test location
side due to the automatic zeroing cycle.
9
4 Transmitter
Measuring range
depending on
resolution ordered
0 to 500 hPa 0.1 hPa 2500 hPa
0 to 1000 hPa 1 hPa 2500 hPa
0 to 2000 hPa 1 hPa 2500 hPa
-50 to 50 Pa 0.1 Pa 20,000 Pa
-100 to 100 Pa 0.1 Pa 20,000 Pa
-500 to 500 Pa 0.1 Pa 20,000 Pa
-10 to 10 hPa 0.01 hPa 200 hPa
-50 to 50 hPa 0.01 hPa 750 hPa
-100 to 100 hPa 0.1 hPa 750 hPa
-500 to 500 hPa 0.1 hPa 2500 hPa
-1000 to 1000 hPa 1 hPa 2500 hPa
-2000 to 2000 hPa 1 hPa 2500 hPa
Upon delivery and following a factory reset the readings are
shown in the display in the unit that was ordered via the
KMAT option Fxx, see Ordering options for testo 6351
transmitter (0555 6351), page 80.
Meas. cycle
• 1/sec
Resolution Overload
10
Interface
• Mini-DIN for P2A software (adjustment and parameterization
software)
• optional: Ethernet module
Voltage supply
• 4-wire (separate signal and supply lines): 20 to 30 V AC/DC,
300 mA power consumption
Maximum load
• 4-wire: 500 Ω (power output)
4 Transmitter
Maximal load
• 4-wire: 10 kΩ (voltage output)
Analog output
• 0 to 1 V ± 1.5 mV (4-wire) or
• 0 to 5 V ± 7.5 mV (4-wire) or
• 0 to 10 V ± 15 mV (4-wire) or
• 0 to 20 mA ± 0.03 mA (4-wire) or
• 4 to 20 mA ± 0.03 mA (4-wire)
• T
= 0.05 %K of measuring range per degree Kelvin of
K
deviation from nominal temperature 22 °C
Resolution of analog output
• 12 bit
Relay
• 4 relays, 250 V AC/DC, 3 A (optional)
Display
• 2-line LCD with plain text line (optional)
Operating temperature
• -5 to 50 °C/23 to 122 °F
11
4 Transmitter
Storage temperature
• -20 to 60 °C/-4 to 140 °F
Process temperature
• -20 to 65 °C/-4 to 149 °F
Housing, weight
• Plastic, 0.7 kg
• Optional Ethernet intermediate layer: 0.6 kg
Protection class
• IP 65 only if the transmitter is wired and/or sealing plugs are
Directives, standards and tests
• EC Directive: 2004/108/EC
Warranty
• Duration: 2 years
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• Warranty conditions: see website www.testo.com/warranty
inserted
4.1.5. Dimensions
Dimensions in mm a b
with M20 cable couplings 144 147
With NPT cable coupling 144 144
With M plug-in connection 143
12
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4.2. Product description
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4.2.1. At a glance
1 Keys (only with optional
2 Service flap screw
3 Display (optio nal)
4 Service flap
5 Negative pressure
6 Positive pressu re connection,
7 Lo wer part of housing
8 M 16 x 1.5 screw
9 M 16 x 1.5 screw
10 Eyelet for measuring point
11 M 20 x 1.5 screw
12 M 20 x 1.5 screw
13 Adjusted probe plug (non-
14 Upper part of housing
* Alternatively, NPT cable
4 Transmitter
display)
connection (self-locking,
2 pcs.)
connection
marked with a red washer
connection*, e.g. analog
outputs
connection*, e.g. voltage
supply
panel
connection*, e.g. R3 and R4
relays
connection*, e.g. R1 and R2
relays
functional probe socket)
couplings or M plug-in
connections are available
13
4 Transmitter
15 Housing screws
16 Hole for fastening to rear
panel bracket (M3 x 6 screw)
17 Plastic bracket for assembly
on rear panel
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4.2.2. Display and keypad
The display option allows operation of the testo 6351 transmitter via
the display and four keys.
14
The LCD display consists of two 7-segment lines for displaying
readings and units and of an information line (for status messages,
for example).
The brightness and contrast of the display and the background
lighting (permanent or off) can be changed via the user menu or the
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4.2.3. Service interface
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P2A software.
The parameterizing socket (mini-DIN) is located behind the service
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flap as an interface to the P2A software.
4.2.4. Relay board (option)
This has a floating switch capacity of 250 V AC/3 A. The switching
limits and hysteresis as well as the function as relay for the
collective alarm can be set via the display or the P2A software.
Further features include:
• Function of changeover contacts (NC/NO contacts) freely
selectable
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• 12 terminals for a total of 4 relays.
If no relays are available, settings for monitoring limit values
or alarms can still be controlled via the display. The alarm
status will be shown on the display.
Only have the transmitter wired and connected by
authorized personnel with the voltage disconnected.
4 Transmitter
4.2.5. Analog outputs
As analog outputs, the testo 6351 has either
• 1 current output of 0 to 20 mA (4-wire)/4 to 20 mA (4-wire) or
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• 1 voltage output of 0 to 1 V/0 to 5 V/0 to 10 V (4-wire)
4.2.6. Parameters
The following parameters are displayed:
• Differential pressure in Pa, hPa, kPa, mbar, bar, mmH
H
O, inch HG, kg/cm2, PSI
2
• Flow3 in m/s, ft/min
3
To prevent fluctuating flow rate values at the zero point (depressurized), the
flow rate values are only calculated as of differential pressures > 0.2 Pa or
15
O, inch
2
4 Transmitter
•
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• Volumetric flow rate
4.2.7. Scaling
There are three types of min./max. values:
1 The measuring range: The maximum sensor performance is in
this range. Values outside of the measuring range are displayed
via messages, for example. Measuring range, see table
(below).
2 Standard scaling: The output signals are assigned to this
measuring range as standard:
◦ during delivery if no entries are made in the order code
◦ after exchanging the unit, the measuring range recorded in
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the instrument is applied as standard.
The transmitter even retains its scaling with the voltage
disconnected.
Measuring range, see table (below).
3 The maximum settings for the manual scaling
◦ The maximum limits can be calculated as follows:
X = difference between MIN. and MAX. value of the
standard scaling
(Max. value of standard) + (50 % of X)
(Min. value of standard) - (50 % of X)
◦ It is thus possible to scale beyond the measuring range, e.g.
for the adjustment of the scaling limits to standard values of
a PLC.
With the alarm definition, however, the physical measuring
range limits are decisive.
Measuring
range/standard scaling
0 to 50 Pa -25 to 75 Pa
0 to 100 Pa -50 to 150 Pa
0 to 500 Pa -250 to 750 Pa
0 to 10 hPa -5 to 15 hPa
4
in m3/h, l/min, Nm3/h, Nl/min
Maximum scaling
> 0.1 % of the respective measuring range (whichever is the greater). With
smaller differential pressures, the flow rate value remains at 0.00 m/s.
4
Calculated
16
4 Transmitter
Measuring
range/standard scaling
0 to 50 hPa -25 to 75 hPa
0 to 100 hPa -50 to 150 hPa
0 to 500 hPa -250 to 750 hPa
0 to 1000 hPa -500 to 1500 hPa
0 to 2000 hPa -1000 to 3000 hPa
-50 to 50 Pa -100 to 100 Pa
-100 to 100 Pa -200 to 200 Pa
-500 to 500 Pa -1000…1000
-10 to 10 hPa -20 to 20 hPa
-50 to 50 hPa -100 to 100 hPa
-100 to 100 hPa -200 to 200 hPa
-500 to 500 hPa -1000 to 1000 hPa
-1000 to 1000 hPa -2000 to 2000 hPa
-2000 to 2000 hPa -4000 to 4000 hPa
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4.2.8. Alarm handling
For upper and lower alarm limits, individual alarms as well as
collective alarms can be specified. If the collective alarm function is
activated, an alarm is triggered as soon as the alarm limit of an
alarm is exceeded, if this alarm is assigned to the collective alarm.
The testo 6351 monitors limit values with the help of relays. If a
reading is outside the limit values, a relay to be specified by the
user is switched.
If the reading reverts to more than a specified hysteresis below or
above the limit value, the alarm is cancelled.
In addition, information about the occurrence of error/status
messages can be provided by means of a collective alarm relay,
see Status, warning and error messages, page 47
If multiple alarm messages are activated at the same time,
the last alarm is shown. If the alarm is cancelled again, the
previous messages are no longer shown.
Maximum scaling
17
4 Transmitter
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4.3. Commissioning
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4.3.1. Assembling the instrument
4.3.1.1. Wall mounting
Attaching rear panel bracket
1. Remove locking screw (see item (4) of drawing below) and
detach rear panel bracket from plastic bracket (see item (2) of
drawing below).
2. Hold rear panel bracket in assembly position and mark the three
drill holes.
3. Drill three holes (Ø 5 mm) and insert dowels where necessary.
4. Screw on rear panel bracket.
Remember that the clamping brackets (1) must face the wall.
Fastening instrument to rear panel bracket
18
1. Slide plastic bracket (2) on the back of instrument onto rear
panel bracket until it engages (see arrows).
2. Insert screw (4) through hole (3) and screw into rear panel
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bracket.
4.3.2. Connecting the instrument
4 Transmitter
Opening the instrument
1. Loosen screw connection (1) of service flap and open the flap.
19
4 Transmitter
20
2. Loosen and remove housing screws (2).
3. Remove upper part of housing from lower part (3) and place on
a clean surface.
WARNING
Electrical voltage
Danger of injury!
> De-energize the mains connection before connecting the
transmitter.
Only have the transmitter wired and connected by
authorized personnel with the voltage disconnected.
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4.3.2.1. Overview of terminals
4 Transmitter
1 Lo wer part of housing 6 Terminal board
2 Relay b oard (option) 7 M 16 x 1.5 screw connection*
3 Relay termi nals
8 Eyelet for measuring point
panel
4 Insulating trough for relay
9 M 20 x 1.5 screw connection*
board
5 Terminal strip for voltag e
supply and analog outputs
* Alternatively, NPT cable
coupling or M plug-in
connection
The following description of the terminals refer to this
overview and its numbering.
21
4 Transmitter
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4.3.2.2. Connecting voltage supply and analog outputs
Terminal strip for voltage
supply and analog outputs,
item (5) of overview of
terminals, page 21
Channels 2 and 3 shown on the circuit board cannot be
used with this instrument.
1. Disconnect connector.
2. Strip the cable ends, clamp wire end ferrules on and screw
down onto voltage terminals.
3. Insert connector into socket.
Wiring diagram for 4-wire system (0 to 20 mA/4 to 20 mA/0 to
1 V/0 to 5 V/0 to 10 V)
1-channel
0 to 20 mA/4 to 20 mA
max. load per 500 Ω
0 to 1 V/0 to 5
V/0 to 10 V
Channels 2 and 3 shown on the circuit board cannot be
used with this instrument.
Requirement for the connecting cable of the supply:
• Insulated with cross-section of at least 0.25 mm²,
maximum 2.7 mm² without wire end sleeves.
• The supply line must be secured against exceeding 8 A.
• An OFF switch must be installed in an easily accessible
position close by and be marked as such.
22
1. Disconnect connector.
2. Strip the cable ends, clamp wire end ferrules on and screw to
channel terminals as shown in diagram.
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4.3.2.3. Connecting the relay outputs
3. Insert connector into socket.
Only have the transmitter wired and connected by
authorized personnel with the voltage disconnected.
There is the option of twelve terminals for a total of four relays. The
designations NC/C/NO (normally closed contact/root or
pin/normally open contact) are etched on the surface of the board.
Using PG screw connection
1. Feed connection cables for the relays through opened
M 20 x 1.5 screw connection (item (10) of overview of
terminals).
2. Strip cable ends and clamp on wire end ferrules.
3. Connect relays according to chosen function (NC/NO) (see
diagrams below; relay 1 is shown as an example of a
connection).
4 Transmitter
Relay terminal strip,
item (3) of overview of
terminals
Using plug-in connections (optional)
Only insert or disconnect the plug-in connection when the
voltage is disconnected.
4. Clean the connector of the probe line and the coupling of any
foreign matter.
Do not disconnect the connector of the probe line from the
instrument for extended periods to protect against
contamination.
23
4 Transmitter
Connection note
• For the connection, a double-insulated mains cable
(sheathed cable) with a cross-section of at least
1.5 mm² must be used.
• Cable connection (2) may not be routed in a loop within
the tray (1).
• It is recommended that you always tie 3 cores to one
another using a cable tie (3).
• The insulation of the cable must be fed at least 5 mm
(4) into the tray.
24
4 Transmitter
Use of relay as NC contact (NC = normally closed)
1 Alarm/status light
(example of installation)
2 250 V AC/DC, 3 A
The busy light (alarm/status light) is permanently on until
the relay opens or the circuit is interrupted. This circuit can
therefore be used to monitor the functionality of the alarm
circuit, as a cable break, for instance, is indicated by the
busy light going off.
Use of relay as NO contact (NO = normally open)
1 Alarm/status light
(example of installation)
2 250 V AC/DC, 3 A
25
4 Transmitter
The busy light (alarm/status light) only comes on when the
relay is switched (closed). Monitoring the functionality of the
alarm circuit is therefore not possible with this switching
operation.
5. Close M 20 x 1.5 screw connection (item (9) in overview of
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terminals).
4.3.2.4. Plug-in connection option
As an option, the PG screw connections of the signal and supply
lines can be replaced with plug-in connections that are installed at
the housing, see item 1 and 2. The relay cabling occurs via
standard cable entries and PG screw connections.
26
Plug-in connections for power supply and channels
M12 plug-in connection (5-pin) socket (item 1)
View of the plug-in connections in the installed state from outside
PIN Assignment
1 V 242 V 24+
3 + Ch1
4 - Ch1
5 PE
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