ZPA 704 User manual

TP-170709 B – PRODUCT MANUAL TYPE 704
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Sensor of absolute and relative pressure and underpressure
with communication HART
INPRES 04
type 704
APPLICATION
- For process industry for exact measurement of absolute
and relative pressure and underpressure of non-
aggressive and aggressive liquids, gases, steams and
dusts up to 600 bar in the areas such as: mining of raw
materials, chemical and petrochemical industry, energetic
industry, heavy industry
- For the environment with explosive gaseous atmosphere
according to ČSN EN 60079-10-1 in design with fixed
closure, in the premises of Zone 1 and Zone 2 according
to ČSN EN 60079-10-1
- For environment with explosive gaseous atmosphere
according to ČSN EN 60079-10-1 in intrinsically safe
design, in the premises of Zone 1 and Zone 2 according
to ČSN EN 60079-10-1 and for environment with
explosive atmosphere with flammable dust according to
ČSN EN 60079-10-2 in the premises of Zone 20, Zone
21 and Zone 22
- As rated gauge for the application e.g. in the sets of rated
meters for the measurement of heat, flow
and quantity of liquids and gases pursuant to the Act No.
505/1990 Coll., on metrology
- As selected equipment of safety class 2 and 3 pursuant to
the Decree No. 132/2008 Coll., on the quality system in
realizing and ensuring activities related to the use of
nuclear energy and radiation activities and on ensuring
quality of the selected equipment with respect to their
classification into safety classes
- As selected equipment of safety class 2, 3 and 4 pursuant
to Decrees of the Nuclear Regulatory Authority of the
Slovak Republic No. 430/2011 Coll., on requirements for
nuclear safety, and No. 431/2011 Coll., on the quality
management system
The pressure sensors are rated products pursuant to the Act
No. 22/1997 Coll. and a Declaration of Conformity EC-704000
is issued for them.
DESCRIPTION
The case of the sensor has independent chambers for
electronic items and for the connecting terminal board. Both
chambers are provided with lids that can be screwed. The
cable outlet for the connecting wiring and the plug are
delivered pursuant to the design of the sensor as accessories.
The terminal board of the sensor is accessible after
unscrewing of the lid.
On the case, the sensor is provided with external terminal for
the connection of the grounding wire or wire for mutual
interconnection.
The sensor is supplied from an external source and it is set-up
to the required range at the manufacturer of the sensor.
The pressure probe consists of the separating membrane. The
sensor is equipped with HART communication.
TECHNICAL DATA
The sensor is designed pursuant to ČSN EN 61140 ed. 2 as
electrical equipment of protection class III for the application
with the category of the rated impulse lasting voltage II and the
pollution grade 2 according to ČSN EN 61010-1 ed. 2; the
follow-up (evaluation) device shall correspond to Article 6.3 of
the said standard.
Protection against electric shock is ensured by power supply
from a safe source of small voltage SELV/PELV
according to ČSN 33 2000-4-41 ed.2.
Resistance to short circuit is permanent; in case of reversing
the poles, the sensor without is damage but also without
function.
Design for explosive atmospheres:
Fixed closure according to ČSN EN 60079-0 ed. 4 and ČSN
EN 60079-1 ed. 2: lI 2G Ex d IIC T5 Gb
(meaning of the designation - refer to figure 7)
Dust-tight closure according to ČSN EN 60079-0 ed. 4 and
ČSN EN 60079-31: II 2D Ex tb IIIC T85 °C Db
(meaning of the designation - refer to figure 7)
Intrinsically safe design according to ČSN EN 60079-0 ed. 4,
ČSN EN 60079-11 ed. 2, ČSN EN 60079-26 ed. 2:
II 2G Ex ia IIB T4 Gb
II 1D Ex ia IIIC T85 °C Da
(meaning of the designation - refer to figure 7)
Electric strength according to ČSN EN 61010-1 ed. 2 Article
6.8.3:
500 V eff (710 V DC)
Electric insulation resistance:
min. 20 M (100 V DC), at ambient temperature of
20 ±15 °C and max. 80 % of relative humidity
Inner capacity: max. 0 nF
Inner inductance: max. 0 µH
Power input: pursuant to supply voltage and
output current, max. 660 mW,
Ingress Protection according to ČSN EN 60529: IP67
Operation position: discretionary (as a default, the sensor
is calibrated in the vertical position with pressure
connection downwards; a different operation position for
pressures PN ≤ 2 bar shall be specified in the purchase order)
Display: LCD display, visible field 32.5 x 22.5 mm
Main display 5-digits, 7-segments, height of figures 8 mm,
range of indicator ± 9999
Additional display 8-digits, 14-segment, height of figures 5 mm
Bar chart 52-segment, accuracy 0.1 % ± 1 digit
Weight: min. 2570 g
Type of operation continuous
Applied materials:
Materials in contact with measured medium:
- Membrane: Corrosion-resistant steel 1.4435
(316L) or special materials - refer to
tab. 1
- Filling of probe: silicone oil or special materials
refer to tab. 1
- Incoming part: steel 1.4541
- Sleeve and cap-nut:
steels 1.0569, 15 128 or 1.4541
- Sealing: standard Al (EN AW-1050A),
options: Cu 42 3005, steel 1.4541
or steel 1.4404
Case and lid of the terminal board:
aluminium alloy EN AB-AlSi9Cu3(Fe)
according to ČSN EN 1676, with
chromate surface treatment and sprayed
with baking paint
View-hole of display: safety glass
Cable bushing and plug: nickel-coated brass,
polyamide 6/6 or polyamide 6
according to design
Plug: nickel-coated brass
PRODUCT MANUAL

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OPERATION CONDITIONS
The environment is defined by the group of parameters and
their severity grades IE 36 pursuant to ČSN EN 60721-3-3 and
the following operation conditions.
Ambient temperature: -20 to 70 °C
Temperature of measured medium:
-40 to 125 °C for filling of silicone oil
-10 to 125 °C for filling of food oil
for relative pressure ranges > 0 bar
max. 150 °C for the period of 60 minutes
at maximum ambient temperature 50 °C
Maximum surface temperature of the sensor:
corresponds to the maximum temperature of the
measured medium
Maximum surface temperature for the equipment operating
in the environment with explosive gaseous atmosphere
according to ČSN EN 60079-0 ed. 4 and the temperature class
of the sensor are specified in dependence on the temperature
of the measured medium according to the following table:
Temperat
ure class Maximum
surface temperature
Maximum
temperature of measured
medium
T6 85°C 80°C
T5 100°C 95°C
T4 135°C 130°C
Maximum permitted surface temperature for the equipment
operating in the environment with explosive atmosphere with
flammable dust according to ČSN EN 60079-0 ed. 4:
a) Limitation of temperature as a result of presence of stirred
dust: Tmax= 2/3 Tcl, where Tcl is the minimum ignition
temperature of stirred dust
b) Limitation of temperature as a result of presence of layers
of dusts up to 5 mm thickness: Tmax= T5 mm – 75 °C,
where T5 mm is the minimum ignition temperature of the
layer of dust with thickness of 5 mm
Maximum permitted surface temperature is established by
the lower value of the aforesaid values.
WARNING
The user shall ensure that the maximum surface
temperature of any part of the sensor does not exceed the
ignition temperature of any gas, steam or dust, which can
be present, due to the impact of thermal sources.
Relative ambient humidity:
10 to 95 % with condensation, with upper limit of water content
29 g H2O/kg of dry air
Atmospheric pressure: 70 to 106 kPa
Vibrations according to ČSN EN 60068-2-6 ed. 2:
Frequency range: 25 to 2000 Hz
Acceleration amplitude: 49 m.s-2 (5g)
Surges according to ČSN EN 60068-2-27 ed. 2: 100 g / 1 ms
Type of supply mains: DC 24 V
Power supply:
- Standard design DC 12 to 28 V
- Design Ex d DC 13 to 28 V
- Design Ex ia from intrinsically safe source
(e.g. INAP 901 ordering No. 901 000 101)
circuit of power supply and input signal:
Ui = 28 V, Ii = 93 mA, Pi = 660 mW, Ci ≈ 0 nF, Li ≈ 0 μH
Inner capacity of power supply connection is max. 27 nF
with respect to the case.
Consumption: 25 mA
Load resistance R:
02,0
min
max
UU
R  [Ω, V, A],
where U is voltage of power supply source at 20 mA
(load during HART communication: Rmin = 250 Ω)
Electromagnetic compatibility:
Emissions and resistance to interference comply with
ČSN EN 61326-1 ed. 2 for the equipment of class A.
METROLOGICAL DATA
Input signal:
Absolute or relative pressure towards the ambient
atmosphere pursuant to table 3 and 4
Suppressed range and start can be set-up within the whole
range of the sensor.
Output signal:
Two-wire 4 to 20 mA with communication HART
Set-up of span: max. 1:10
Offset: 0 … 90 % FSO
Dampening: 0 to 100 s
Basic error (accuracy): ≤ ±0.1 % FSO for span ≤1:5
≤ 0.1 + 0.015 x (span - 5) % FSO for span > 1:5
Long-term stability: ≤ ± 0.1 % FSO/year
at reference conditions
Response: 100 ms (regardless of electronic dampening)
Additional errors:
- Impact of changes of supply voltage: 0.05 % FSO / 10V
- Impact of load: 0.05 % FSO / kΩ
- Impact of temperature: ≤ 0.2 % FSO
The impact of other influencing quantities has no metrological
importance.
DESIGNATION
Data on the sensor label
- Trademark of the manufacturer
- Made in Czech Republic
- Product ordering number
- Manufacturing number
- Maximum overpressure
- Ingress Protection
- Measuring range
- Output signal
- Type of supply mains
- Designation of non-explosiveness Ex ia, Certificate No.
and parameters: Ui = 28 V
Ii = 93 mA
Pi = 660 mW
Ci = 0 nF
Li = 0 µH
C
gnd = 27 nF
- Designation of non-explosiveness Ex d and Ex tb,
Certificate No.
- TCM type approval mark xxxxxxxxxx (for certified design
– code /P1)
- Designation CE or CE 1026 (for design Ex ia and Ex d)
DELIVERY
Unless agreed otherwise with the customer, each delivery
includes:
- Delivery note
- Sensor pursuant to the purchase order
- Accessories (cable outlet and plug) according to table 2
- Optional accessories (installation holder) according to
table 1
- Optional accessories (weld-on sleeve with cap-nut and
sealing) according to table 3
- Suitable valve or manifold to be ordered separately
according to table 4 and the catalogue of type 961, 964
and 967
- Accompanying technical documentation in Czech:
o Product quality and completeness certificate, which
also serves as the warranty certificate
o Calibration report
o EC Declaration of Conformity (only design Ex)
o Declaration of Conformity of the supplier according to
ČSN EN ISO/IEC 17050-1 (for orders according to the
Decree 132/2008 Coll.)
o Product manual
o Manual for the applicable valve or manifold together
with the manual for accessories of type 981
If it is established in the purchase contract or agreed
otherwise, the following documentation may be also delivered
with the product:
- EC Declaration of Conformity
- Copy of the Ex type examination certificate according to
the Decree of the Government 23/2003 Coll. (only for
design Ex)
- For certified design pursuant to Act No. 505/1990 Coll.
o Copy of the gauge type approval certificate
o Confirmation about verification of the rated gauge

TP-170709 B - PRODUCT MANUAL TYPE 704
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CERTIFICATION
- Non-explosiveness lI 2G Ex ia IIB T4 Gb
II 1D Ex ia IIIC T85 °C Da
Ex type examination certificate according to the Decree of
the Government 23/2003 Coll.
xxxxxxxxxxxxxxxx
- Non-explosiveness lI 2G Ex d IIC T5 Gb
II 2D Ex tb IIIC T85 °C Db
Ex type examination certificate according to the Decree of
the Government 23/2003 Coll.
xxxxxxxxxxxxxxxxx
PACKING
Both the sensors and accessories are delivered in a packing
ensuring resistance to the impact of thermal effects and
mechanical effects pursuant to the controlled packing
regulations.
TRANSPORT
The sensors may be transported on conditions corresponding
to the set of combinations of classes IE 21 pursuant to ČSN
EN 60721-3-2 (i.e. by airplanes and trucks, in premises that
are ventilated and protected against atmospheric conditions).
STORAGE
The sensors may be stored on conditions corresponding to the
set of combinations of classes IE 11 pursuant to ČSN EN
60721-3-1 (i.e. in places with temperature for design without
display between -40 and 80 °C and for design with display -30
and 80 °C, with humidity from 5 to 95%, without a special
threat of an attack by biological agents, with vibrations of small
significance and not situated close to sources of dust and
sand).
TABLE 1 - DESIGN OF PRESSURE SENSORS
SPECIFICATION ORDERING NUMBER
704 x x xx x x x x x xx
Standard design for environment without danger of explosion 1
Design Ex d - fixed closure 2
Intrinsically safe design for gases and dust Ex ia 3
Measured pressure Relative 1
Absolute 2
Ranges of nominal
pressure
(relative/absolute)
0 to 0.4 bar **) 01
0 to 1 bar 02
0 to 2 bar 03
0 to 4 bar 04
0 to 10 bar 05
0 to 20 bar 06
0 to 40 bar 07
0 to 100 bar 08
0 to 200 bar 09
0 to 400 bar 10
0 to 600 bar 11
Underpressure ranges of
nominal pressure
(relative)
-0.4 to 0.4 bar 12
-1 to 1 bar 13
-1 to 2 bar 14
-1 to 4 bar 15
-1 to 10 bar 16
Material of membrane Corrosion-resistant steel 1.4435 1
Special (e.g. Hastelloy, Tantal and others) *) 9
Filling Silicone oil 1
Special (food oil, Halocarbon and others) *) 9
Process connection
M20 × 1.5 with sleeve according to ČSN EN 837-1 1
G ½ with sleeve according to ČSN EN 837-1 2
Others after agreement as a special request 9
Optional accessories
Installation holder for
attachment of sensor
Without holder 0
On the wall (Figure 1) 1
For 2” tube (Figure 2) 2
Weld-on sleeve with cap-nut and sealing according
to table 3 NAxx
Verification pursuant to Act 505/1990 Coll. for the applications that do not fall
within the competence of the Directive of the unified approach MID, pursuant to
the Decree of the Government No. 464/2005 Coll. ***)
/P1
*) Only as a special request on the basis of an agreement with the manufacturer
**) Absolute pressure possible only from 1 bar
***) If code P1 is not specified, the devices are delivered with the initial calibration including the calibration report
ORDERING
The purchase order shall specify:
- Name
- Product ordering number
- Measuring range (for a different range than the basic one)
- Other (special) requirements
- Number of pieces
In addition to that, the purchase order shall also specify if the
delivery of the valve or manifold for the connection to the
impulse piping is required for the sensor. It shall be ordered
separately.
PURCHASE ORDER EXAMPLE
Standard design
Absolute pressure sensor with communication HART
704 220 511 21 NA1/P1
2 pcs

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TABLE 2 – OVERVIEW OF CABLE OUTLETS AND PLUGS, TYPE 981, DELIVERED TO THE PRESSURE SENSORS
DESIGN OF PRESSURE
SENSORS
OUTLET (connecting thread 1/2-14 NPT) PLUG (connecting thread 1/2-14
NPT)
DESCRIPTION ORDERING
NUMBER DESCRIPTION ORDERING NUMBER
Standard design for the environment
without danger of explosion
Outlet for cable Ø 5-12 mm, material polyamide
6 grey 981 VK 512 P0
Plug Ex d, material
nickel-coated brass 981 ZK M1
Design Ex d - fixed closure and Ex tb –
dust-tight closure
Outlet Ex d for cable Ø 6-12 mm with cable
clamp, material nickel-coated brass 981 VK 612 M1
Intrinsically safe design for gases and
dust Ex ia
Outlet Ex ia for cable Ø 7-12 mm, material
polyamide 6/6 blue 981 VK 712 P0
As a default, the cable outlet and the plug are delivered to each sensor. With the ordering number, the outlet and the plug can be ordered
separately.
TABLE 3 – OVERVIEW OF WELD-ON SLEEVES WITH CAP-NUT AND SEALING – TYPE 981 DELIVERED TO THE
PRESSURE SENSORS
CODE THREAD OF CAP-NUT MATERIAL INNER Ø FOR TUBE
[mm] DIMENSIONAL DRAWING
NA1 M20x1.5 Carbon steel
1.0569
6.5
NAG1 G1/2
NA2 M20x1.5 Corrosion-resistant
steel 1.4541
NAG2 G1/2
NA3 M20x1.5 Creep-resisting steel
15 128
NAG3 G1/2
NA4 M20x1.5 Carbon steel
1.0569
NAG4 G1/2
NA5 M20x1.5 Corrosion-resistant
steel 1.4541
NAG5 G1/2
NA6 M20x1.5 Creep-resisting steel
15 128
NAG6 G1/2
The sleeve is delivered by 1 pc together with the relevant cap-nut and aluminium sealing. After putting the cap-nut on the sleeve and after
welding the sleeve to the piping, it is possible to connect the armature, which is provided with the corresponding screw-joint for the sleeve
pursuant to the dimensional drawing of the screw-joint, to the piping.
CAP-NUT FOR WELD-ON SLEEVE
MATERIAL OF NUT DIMENSIONAL DRAWING OF NUT DIMENSIONAL DRAWING
OF SCREW-JOINT
Corrosion-resistant steel 1.4541
(only for NA2, NAG2, NA3, NAG3, NA5,
NAG5, NA6 and NAG6
Carbon steel 11 109.0
(only for NA1, NAG1, NA4 and NAG4)
SEALING RINGS FOR WELD-ON SLEEVE
They can be also ordered separately from materials pursuant to the ordering numbers specified hereinbelow.
ORDERING NUMBER OF SEALING MATERIAL DIMENSIONAL DRAWING
382 041 Al EN AW-1050A
276 067 Cu 42 3005
382 063 Steel 1.4541
382 096 Steel 1.4404
TABLE 4 - DESIGN OF VALVES RECOMMENDED FOR ASSEMBLY WITH THE PRESSURE SENSOR
SPECIFICATION ORDERING NUMBER
xxx xx xx xx xxx **)
Stainless valve
Direct
967
11
Manometric closing with venting valve 41
Manometric testing with venting valve and screw-joint M20x1.5 for the
connection of control manometer 51
Manometric testing with venting valve and screw-joint M20x1.5 for the
connection of control manometer that can be closed with a valve 52
Brass valve
Manometric closing with venting valve
961
4E
Manometric testing with venting valve and screw-joint M20x1.5 for the
connection of control manometer 5E
Two-way stainless manifold 964 41
CONNECTING TERMINALS
according to manual for
accessories of type 981
OF INPUT 31 *)
35 *)
OF OUTPUT
33
39
40
SEALING OF SPINDLE
SEALING OF SEAT
SPECIAL TREATMENT
*) For the type 967 and 964, you can also choose other connecting terminals of input according to the manual for accessories of type 981 (for design 967
52, it is only possible to select the code 35 as a different connecting terminal of the input)
**) Codes of sealing of spindle, sealing of seat and special treatment shall be selected according to the product manuals for individual types of the valves
and the manifold pursuant to the measured medium

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ORDERING THE VALVES AND
MANIFOLDS
Order according to the catalogue of valves, type 961 and 967,
and the catalogue of manifolds, type 964 (recommended
valves and manifolds according to table 4)
The purchase order shall specify:
- Name
- Product ordering number
- Other (special) requirements
- Number of pieces
PURCHASE ORDER EXAMPLE
Standard design:
Stainless valve
967513133
15 pcs
TABLE 5 - MEASURING RANGE OF PRESSURE AND LIMITS OF OVERLOADING
Limit of measurement range Max. overload
[bar]
Destruction
pressure [bar]
Upper *) [bar] Lower [bar]
-1.0 0.4 2.0 3.0
-1.0 1.0 5.0 7.5
-1.0 2.0 10.0 15.0
-1.0 4.0 20.0 25.0
-1.0 10.0 40.0 50.0
-1.0 20.0 80.0 120.0
-1.0 40.0 105.0 210.0
-1.0 100.0 210.0 420.0
-1.0 200.0 600.0 1000.0
-1.0 400.0 1000.0 1250.0
-1.0 600.0 1000.0 1250.0
*) For abs. pressure 0 bar
The maximum overload can influence metrological properties of the sensor. Higher overload than the maximum can cause damage to
the probe.
Note: The adjustment is realized at the ambient temperature 20 ±2°C.
TABLE 6 - MEASURING RANGE OF UNDERPRESSURE AND LIMITS OF OVERLOADING
Limit of underpressure
measurement range Max. overload
[bar]
Destruction
pressure [bar]
Upper [bar] Lower [bar]
-0.4 0.4 2.0 3.0
-1.0 1.0 5.0 7.5
-1.0 2.0 10.0 15.0
-1.0 4.0 20.0 25.0
-1.0 10.0 40.0 50.0
VERIFICATION ACCORDING TO ACT
505/1990 Coll.
The sensors are verified pursuant to TPM 4655-01. The
certified sensors are provided with a label with an official mark
of the verification.
Type of location of the official mark of the verification:
The manufacturer performs follow-up verification pursuant to
Act 505/1990 Coll., on metrology, as amended. Follow-up
verification is ordered with the department AMS ZPA N. Paka
a.s. ([email protected]).
At request of the customer, a confirmation about verification of
the rated meter may be issued later on for the certified sensor.
The purchase order shall specify:
- Product ordering number *)
- Manufacturing number *)
*) Data are identified on the device label
The manufacturer performs follow-up verification pursuant to
Act 505/1990 Coll., on metrology as amended. Follow-up
verification is ordered with the department AMS ZPA N. Paka
a.s. ([email protected] ).
CALIBRATION
The devices, for which verification is not required pursuant to
Act 505/1990 Coll., are delivered with the initial calibration
including the calibration report.
Follow-up calibration is ordered with the department AMS ZPA
N. Paka, a.s ([email protected] ).

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INSTALLATION AND CONNECTION
INSTALLATION OF THE SENSOR
During the installation, it is necessary to consider Ingress
Protection of the device and the operation position according
to Article Technical data.
The sensors are connected by means of holders either on the
wall or on a 2“ tube. Examples of the sensor installation are
provided in figures 2 and 3.
FIGURE 2 - MANNER OF INSTALLATION OF THE SENSOR
ON THE WALL
Yoke for
sensor
installation Washer
Nut M8
Holder on the wall
Anchoring for M8
FIGURE 1 – DIMENSIONAL DRAWING OF THE PRESSURE SENSOR

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FIGURE 3 - Manner of installation of the sensor on 2” tube
CONNECTION TO THE IMPULSE PIPING
The connection can be realized either directly with the use of
the valve or another armature with manometric threads M20 x
1.5 and G 1/2 and/or by means of accessories (weld-on sleeve
with cap-nut and sealing).
The installation of the devices by means of weld-on sleeve:
1. Slide a cap-nut on the sleeve
2. Weld the sleeve on the end of the tube
3. Put a metal sealing on the screw-joint (use the sealing
corresponding to the medium and pressure)
4. Screw the piping to the screw-joint with the use of a nut
and tighten with torque of max. 120 Nm
Sealing ring of the input screw-joint is only for one use (after
tightening of the input screw-joint, it is deformed). During
repeated installation of the sensor on the piping, a new sealing
ring shall be used.
Ordering numbers of rings are specified in the Article Spare
parts.
When using the impulse piping from corrosion resistant steel, it
is possible to order a sealing ring from steel 1.4541 or 1.4404.
The pressure sensor can be completed with the stainless
valves of type 967, brass valves of type 961 or manifolds of
type 964, recommended valves and manifolds - refer to table
3.
In designing the impulse piping, the following main principles
shall be complied with:
- The impulse piping should be as short as possible and
have sufficient cross-section so that pressure losses or
clogging do not occur.
- The impulse piping shall have an even declination
downwards from the consumption to the sensor (during
measurement of pressure of the liquid or steam), so that
the created bubbles return to the piping or upwards
(during the measurement of gas pressure), so that the
condensing liquid could flow back to the piping
- The impulse piping shall be sealed properly
- Avoid freezing of the liquid in the impulse piping
- Do not exceed maximum temperature of the measured
liquid on the input of the sensor
FIGURE 4 - THE CONNECTION OF THE SENSOR TO THE
IMPULSE PIPING
ELECTRIC CONNECTION
The electrical connection may be only realized by qualified
workers pursuant to § 5 of the Decree 50/1978 Coll.
Install a sealing outlet and a plug with thread 1/2-14 NPT
delivered as accessories of the sensor into the case of the
sensor. The installation of the outlet and the plug shall be
realized according to the manual for accessories of the
pressure sensors – outlets and plugs, type 981, and the
applicable instructional sheets.
The terminal board is accessible after unscrewing of the lid.
FIGURE 5 – SCHEME OF ELECTRIC CONNECTION:
The terminals enable the connection of the source and
evaluation device with Cu wires to max. cross-section of 2.5
mm2 with the total insulation resistance min. 10 M.
Maximum cross-section of the wire for connection to
external grounding terminal:
External terminal: strand 4.0 mm2, full wire 6.0 mm2
If strands are used for the interconnection, they shall be
protected against fraying with a pressing hollow piece.
Yoke for sensor
installation
Installation holder
Yoke for connection
on 2" tube
Nut M8
with
g
roove
power supply +
power supply -

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FIGURE 6 – VIEW OF THE TERMINAL BOARD
Connect the source and the evaluation device pursuant to the
connection scheme (figure 5) with a circular cable with the
diameter 5 (6 or 7) to 12 mm pursuant to the used cable outlet.
Use a multi-core, twisted, shielded cable for relative pressure
with a hollow core.
Reference pressure is brought to the sensor of relative
pressure with a hollow core in the electric cable. The hollow
core on the side of the outlet shall be connected to
atmosphere.
The sensor has protection against reversing polarity of supply
voltage.
Ground the shielding (connect it to structure) only in one point.
Do not place the cable together with power cables. Connect
the evaluation device with a cable with the total insulation
resistance min. 10 M.
The cable should be always oriented downwards from the
device. If it shall be situated upwards, we recommend leading
it under an angle so that humidity is removed better. The cable
insulation shall have chemical, mechanical and thermal
resistance in compliance with the environment, in which the
cable will be installed. We recommend supporting the cable
along the length between the sensor and the follow-up device.
ORIENTATION OF THE DISPLAY AND OPERATING
MODULE
The display and the operating module are revolving, which
enables comfortable reading of the data of the display even in
unusual installation positions. When modifying the orientation
of the display, proceed as follows:
- Unscrew the metal lid by hand
- Turn the display and operating module carefully to the
required position; the module is equipped with limitation
of rotation
- Before you screw the metal lid back, check if the O ring or
the sealing area is not damaged; if required, replace
them!
WARNING
Do not unscrew the lid and do not set-up the display if the
sensor is located in the environment with a danger of
explosion.
Ensure that no humidity ever enters the device!
COMMUNICATION HART
For the sensors with HART protocol, the maximum length of
the wiring is defined by the arrangement of wires of the
connecting cable. The total length of the wiring may be up to
1500 m. A twisted two-wire is required that is shielded together
with the cross-section of the core min. 0.5 mm2. The HART
communicator is connected according to Figure 5. For reliable
communication, there shall be total load resistance of min. 250
 in the circuit of the output loop.
Maximum length of the cable between the device and power
supply:
vvv CCR
L36
max
10401065 




where Lmax: maximum length of cable [m]
RV: cable resistance together with load resistance
R
max [Ω]
CV: cable capacity [pF/m]
Load resistance R:
02,0
min
max
UU
R  [Ω, V, A]
where U is voltage of the supply source at 20 mA
WARNING
The sensor may not be connected to the computer or
HART communicator if the sensor is located in the
environment with a danger of explosion.
INSTALLATION AND CONNECTION OF THE SENSOR IN
DANGEROUS PREMISES WITH EXPLOSIVE GASEOUS
ATMOSPHERE OR WITH STIRRED FLAMMABLE DUST
The installation of the sensor in dangerous premises with
explosive gaseous atmosphere or with stirred flammable dust
shall be in compliance with the requirements of ČSN EN
60079-14 ed. 4.
Surface temperature of the sensor may not exceed maximum
surface temperature for that particular temperature class.
For the installation in dangerous premises, interconnection is
required (bringing to the same potential). To achieve that, you
can use the external terminal of the box of the sensor.
The sensor need not be connected separately to the system of
interconnection if it is firmly attached and has metal
interconnection with the structural parts or the piping, which is
connected to the system of interconnection.
WARNING
After the end of the installation, the initial revision of the
equipment and the installation shall be performed
according to ČSN EN 60079-17 ed.4.
OTHER REQUIREMENTS FOR THE INSTALLATION AND
CONNECTION OF THE SENSOR IN DESIGN Ex ia (CODE 3)
The sensors in design Ex ia can be used in the environment
with a danger of explosion Zone 1, 2, 20, 21 and 22 only in
connection with the source approved for power supply of
intrinsically safe equipment pursuant to ČSN EN 60079-11 ed.
2, e.g. INAP 901 ordering number 901 000 101
The source shall comply with the parameters identified on the
sensor label. For the interconnection, use only insulated
cables, the testing voltage of which is at least AC 500 V or
DC 750 V, diameter of individual wires may not be smaller
than 0.1 mm (it also applies to individual wires of the strand).
OTHER REQUIREMENTS FOR THE INSTALLATION AND
THE CONNECTION OF THE SENSOR IN DESIGN Ex d
(CODE 2)
The distance of the fixed closure Ex d IIC from close structures
or between closures shall be at least 40 mm.
WARNING
The connecting cable shall have a jacket from
thermoplastic, thermoset or elastomer materials, shall be
compact and shall have circuit cross-section. The length
of the connecting cable shall be at least 3 m. The
temperature of the resistance cable shall be in compliance
with the temperature of the surrounding environment!
INSTALLATION OF THE CABLE OUTLET AND PLUG
To secure the fixed closure, only certified cable outlet and plug
II 2 GD Ex d shall be used with Ingress Protection IP 68
(refer to accessories 981 or another similar outlet and plug).
The cable outlet and plug shall be tightened in the case of the
sensor with the prescribed manner. Toque of the body of the
outlet and plug with thread 1/2-14 NPT is min. 25 Nm.
Installation of the cable in the outlet, its sealing and securing
against pull-out shall be realized according to the instructional
sheet of the supplier of the outlet.
grounding terminal

TP-170709 B - PRODUCT MANUAL TYPE 704
9 / 13
WARNING
Do not use other sealing rings in the outlet than the
originals delivered by the manufacturer. Do not change
the outer diameter of the cable artificially, e.g. by winding
electro-insulating tapes around it.
CLOSING THE CASE OF THE FIXED CLOSURE Ex d
Tighten the lid of the display and the lid of the terminal board
after the connection of electricity of the sensor manually up to
the stop. Before screwing the metal lid back, check if the O
ring or the sealing area is not damaged; if required, replace
them!
WARNING:
Supply of electrical energy of the sensor may not be
connected before the closure of the fixed closure!
INSTALLATION OF THE RATED GAUGE
Installation, commissioning and service maintenance of the
rated gauges pursuant to the Act 505/1990 Coll., on metrology,
may only be realized by a person that is a bearer of a valid
authorization for installation and maintenance of rated gauges
issued e.g. in ZPA Nová Paka a.s.
After the installation in the place of the application, the certified
sensors shall be provided by the authorized worker of the
installation and service organization with the installation seal
with the mark of the installation and service organization
preventing from unauthorized manipulation.
COMMISSIONING
After the installation of the sensor, the impulse piping and the
sensor shall be vented or, as the case may be, drained.
During the measurement of steam before draining of the
sensor, we recommend flooding the impulse piping with water.
After the connection of the supply voltage, the sensor is
prepared for operation.
OPERATION AND MAINTENANCE
The sensor does not require any operation and maintenance.
DISPLAY AND OPERATING PUSH-BUTTONS
The display is equipped with a bar chart, which displays the
current pressure in percent in ratio to the changing range.
Display of the measure value as well as the configuration of
individual parameters is realized by means of the menu on the
display. Individual functions can be set-up by means of three
miniature push-buttons located under the metal lid. The layout
of the three push-buttons from the left is as follows: ▼, ▲, OK.
The system of the menu is closed; therefore, it is possible to
“scroll” forwards and backwards by individual points of the
menu till you reach the required point of the menu. All set-ups
are stored in the long-term in the EPROM memory so that they
are available again even after the interruption of the power
supply.
WARNING
Do not set-up the sensor if it is located in the environment
with a danger of explosion.
Ensure that no humidity ever enters the device during the
set-up! Sealing and sealing areas may not be polluted.
Immediately after the set-up of the device, screw the lid
back on the device.
STRUCTURE OF THE SYSTEM OF THE MENU (refer to
Tables 7, 8 and 9)
List of menu
- Push-button ▲: with this push-button you move forwards
in the system of the menu or increase the displayed
values; at the same time you use this push-button to get
to the system of the menu (start on point "1 DISPLAY")
- Push-button ▼: with this push-button you move
backwards in the system of the menu or decrease the
displayed values; at the same time you use this push-
button to get to the do system of the menu (start on point
"5 SERVICE“)
- Push-button OK: this push-button is used for the
confirmation of a particular point of the menu and the
adjusted value
Progress of the configuration:
- Select the particular points of the menu by means of
push-buttons ▲ or ▼
- Activate the particular point of the menu by means of the
push-button OK
- Set-up the required values or entered quantities by
means of push-buttons ▲or ▼
- Saving/confirmation of the selected values / selected set-
up and exiting the menu is realized by means of the push-
button OK
If any of the parameters is adjustable to a specific numerical
value, it is possible to set-up each digit of the value separately.
It means that after you activate a particular point of the menu
(e.g. "2.3.1 OFFSET") by pressing the push-button OK, the
first digit of the set-up value starts flashing. Now by means of
the push-button ▼ or ▲ adjust the required value and confirm
it by pressing the push-button OK. Then the following digit
starts flashing, which can be set-up as the first digit. In the
points of the menu "2.3.1 OFFSET" and "2.3.2 FINALVAL",
decimal dot also starts flashing; by means of push-buttons ▼
or ▲ you can adjust its position. Confirm its position with the
push-button OK. If the value is permissible, it will be saved. If
error message appears on the display, the value was entered
incorrectly and it will not be saved. If you want to select a
negative value, set it up on the first digit by means of the push-
button ▼.
On principle, the device does not require maintenance. If
necessary, it is possible to clean the case of the device with a
wet cloth with non-aggressive cleaning items. Some media can
cause occurrence of deposits or pollution of the membrane. If
such properties of the media are known, the user shall identify
corresponding intervals of cleaning.
In case of correct termination of operation of the device, the
membrane can be cleaned carefully with non-aggressive
detergent with the use of a fine brush or sponge. If lime
deposits appear on the membrane, we recommend letting the
manufacturer remove them.
Incorrect cleaning can result in irreparable damage of the
sensor. Therefore, never use sharp objects or compressed air
for cleaning the membrane.
In case of the pressure sensors in design Ex, maintenance
and follow-up regular periodic revisions or permanent
supervision of expert staff are realized according to ČSN EN
60079-17 ed.4.
WARNING
Any intervention into the sensor and its structure will
result in a change of the properties and may result in an
explosion!
DISASSEMBLY OF THE SENSOR
WARNING
Pressure sensor in design Ex must be disconnected from
the supply source before opening the lid and releasing the
cable of the outlet in the environment with a risk of
explosion!

TP-170709 B - PRODUCT MANUAL TYPE 704
10 / 13
RELIABILITY
The reliability indicators in operating conditions and conditions
of the environment specified in this manual:
- Service life 100 x 108 pressure cycles
SPARE PARTS
SPECIFICATION ORDERING NUMBER
Sealing
Al (EN AW-1050A) 382041
Cu 42 3005 276067
Steel 1.4541 382063
Steel 1.4404 382096
WARRANTY
Pursuant to Section 2113 of the Civil Code (Act No. 89/2012
Coll.), the manufacturer warrants for technical and operating
parameters of the product specified in the manual. The
warranty period shall be 24 months from the receiving of the
product by the customer, unless established otherwise in the
purchase contract or another document.
The rejection of defects shall be enforced in writing at the
manufacturer within the warranty period. The rejecting side
shall identify the product name, ordering and manufacturing
numbers, date of issue and number of the delivery note, clear
description of the occurring defect and the subject of the claim.
If the rejecting side is invited to send the device for repair, it
shall do so in the original package of the manufacturer and/or
in another package ensuring safe transport.
The warranty shall not apply to defects caused by
unauthorized intervention into the device, its forced
mechanical damage or failure to comply with operation
conditions of the product and the product manual.
REPAIRS
The sensors shall be repaired by the manufacturer. The
sensors shall be sent for repair in the original or equal package
without accessories.
Within the service life of the device, slight shift of the offset or
end point can occur. It will be demonstrated by a deviation of
the output signal from the originally pre-set value of the offset
and end point. If this condition happens after a longer usage,
we recommend recalibrating the device to ensure high
accuracy of the device further on.
DISABLING AND LIQUIDATION
They shall be realized in compliance with the Waste Act No.
106/2005 Coll.
Both the product and its package do not include any parts that
could impact the environment.
The products that are withdrawn from operation, including their
packages (with the exception of products marked as electrical
equipment for the purposes of return withdrawal and selected
salvage of electrical waste), may be disposed of to the sorted
or unsorted waste pursuant to the type of waste.
The manufacturer realizes free return withdrawal of marked
electrical equipment (from 13.8.2005) from the consumer and
notifies of the danger connected with their illegal disposal.
The package of the sensor is fully recyclable.
The package of the sensor can be recycled fully. Metal parts of
the product are recycled, non-recyclable plastic materials and
electrical waste shall be disposed of in compliance with the
aforesaid Act.