Burkert 8325 User manual

Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
EN
DE
FR
Pressure transmitter Type 8325
Drucktransmitter Typ 8325
Pressure transmitter Type 8325
Transmetteur de pression type 8325
2
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
DE
FR
Operating Instructions Type 8325 Page 3 - 38
Bedienungsanleitung Typ 8325 Seite 39 - 74
Manuel d’utilisation type 8325 Page 75 - 112
We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modication technique.
Operating Instructions 1811/01_EU-ML / Original_EN
14311508.01
Prior to starting any work, read the Operating Instructions!
Keep for later use!
Vor Beginn aller Arbeiten Bedienungsanleitung lesen!
Zum späteren Gebrauch aufbewahren!
Lire le manuel d‘utilisation avant de commencer toute opération !
A conserver pour une utilisation ultérieure !

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Contents
1. General information 5
2. Safety 7
3. Labelling / safety marks 9
4. Specications of the transmitter 8325-S, ≥ 0,4 bar 10
5. Specications of the transmitter 8325-F, ush diaphragm 16
6. Specications of the transmitter 8325-L, < 0,4 bar 21
7. Design and function 24
8. Transport, packaging and storage 24
9. Commissioning, operation 26
10. Zero point adjustment and span 32
11. Maintenance and cleaning 34
12. Faults 35
13. Dismounting, return and disposal 37
14. Accessories for the transmitter 8325-F, ush diaphragm 38
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
15. Declaration of conformity 38

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
1. General information
1. General information
■
The transmitter described in the Operating Instructions has been designed and manufactured using state-of-the-art
technology.
All components are subject to stringent quality and environmental criteria during production.
■
These Operating Instructions contain important information on handling the instrument.Working safely requires that
all safety instructions and work instructions are observed.
■
Observe the relevant local accident prevention regulations and general safety regulations for the instrument's range
of use.
■
The Operating Instructions are part of the product and must be kept in the immediate vicinity of the instrument and
readily accessible to skilled personnel at any time.
Pass the Operating Instructions onto the next operator or owner of the instrument.
■
Skilled personnel must have carefully read and understood the Operating Instructions prior to beginning any work.
■
The manufacturer's liability is void in the event of any damage caused by using the product contrary to its intended
use, non-compliance with these Operating Instructions, assignment of insuciently qualied skilled personnel or
unauthorised modications to the instrument.
■
The general terms and conditions contained in the sales documentation shall apply.
■
Subject to technical modications.
■
Further information:
Contact your local Bürkert sales oce.
The addresses of our international sales oces are available on the internet at: www.burkert.com
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in serious injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries or damage to the equipment or
the environment, if not avoided.
Information
... points out useful tips, recommendations and information for ecient and trouble-free operation.
WARNING!
... indicates a potentially dangerous situation that can result in burns, caused by hot surfaces or liquids, if
not avoided.
Abbreviations
2-wire The two connection lines are used for the voltage supply.
The measurement signal also provides the supply current.
3-wire Two connection lines are used for the power supply.
One connection line is used for the measurement signal.
U+ Positive power supply terminal
U– Negative power supply terminal
S+ Positive output terminal
1. General information

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
2. Safety
WARNING!
Before installation, commissioning and operation, ensure that the appropriate transmitter has been selected
in terms of measuring range, design and specic measuring conditions.
Non-observance can result in serious injury and/or damage to the equipment.
WARNING!
■
Open the connections only after the system has been depressurised.
■
Observe the working conditions in accordance with chapters 4, 5 and 6.
■
Always operate the transmitter within the overpressure limit.
WARNING!
Risk of burn injury due to high uid temperatures
■
Do not touch with bare hands the parts of the device that are in contact with the uid.
■
Use safety gloves to handle the device.
■
Before opening the pipe, stop the circulation of uid and drain the pipe.
■
Before opening the pipe, make sure the pipe is completely empty.
Further important safety instructions can be found in the individual chapters of these Operating Instructions.
2.1 Intended use
The transmitter is used to convert pressure into an electrical signal indoors and outdoors.
For applications with direct contact with foodstus, only use the transmitter 8325-F, ush diaphragm.
Only use the transmitter in applications that lie within its technical performance limits (e.g. max. ambient temperature,
material compatibility, ...).
The instrument has been designed and built solely for the intended use described here, and may only be used
accordingly.
The technical specications contained in these Operating Instructions must be observed. Improper handling or opera-
tion of the transmitter outside of its technical specications requires the instrument to be taken out of service immedi-
ately and inspected by an authorised Bürkert service engineer.
The manufacturer shall not be liable for claims of any type based on operation contrary to the intended use.
2. Safety
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
2.2 Personnel qualication
WARNING!
Risk of injury should qualication be insucient!
Improper handling can result in considerable injury and damage to equipment.
The activities described in these Operating Instructions may only be carried out by skilled personnel who
have the qualications described below.
Skilled personnel
Skilled personnel are understood to be personnel who, based on their technical training, knowledge of measurement
and control technology and on their experience and knowledge of country-specic regulations, current standards and
directives, are capable of carrying out the work described and independently recognising potential hazards.
Special operating conditions require further appropriate knowledge, e.g. of aggressive media.
2.3 Special hazards
WARNING!
For hazardous media such as oxygen, acetylene, ammable or toxic gases or liquids, and refrigeration
plants, compressors, etc., in addition to all standard regulations, the appropriate existing codes or
regulations must also be followed.
WARNING!
Residual media in dismounted transmitters can result in a risk to persons, the environment and equipment.
Take sucient precautionary measures.
Do not use this instrument in safety or emergency stop devices. Incorrect use of the instrument can result in injury.
Should a failure occur, aggressive media with extremely high temperature and under high pressure or vacuum may
be present at the instrument.
2. Safety

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
3. Labelling / safety marks
Product label (example)
FLUID CONTROL SYSTEMS
0 ... 16 bar
4 ... 20 mA
DC 10 ... 30 V DC max. 25 mA
Made in Germany
U+:1
U-:2
7M
8325
ID.-No. 569098
S# 11639110
www.burkert.com
  


 

P# product number Power supply
S# serial number Comply with the relevant European directives
Measuring range Coded manufacturing date
Output signal Pin assignment
If the serial number becomes illegible due to mechanical damage or overpainting, traceability will no longer be possible.
Before mounting and commissioning the instrument, ensure you read the Operating Instructions!
3. Labelling / safety marks
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
4. Specications of the transmitter 8325-S, ≥ 0,4 bar
Specications
Measuring range See product label or test report
Vacuum tightness Yes
Reference conditions Per IEC 61298-1
■
Atmospheric pressure 15 ... 25 °C (59 ... 77 °F)
■
Atmospheric pressure 860 ... 1,060 mbar (12.5 ... 15.4 psi)
■
Humidity 45 ... 75 % r. h.
■
Power supply 24 V DC, 5 V DC with ratiometric output
■
Mounting position Calibrated in vertical mounting position with pressure connection facing downwards.
Settling time ≤ 3 ms
Output signal See product label or test report
Permissible load in Ω
■
Current output ≤ (power supply - 7.5 V) / 0.023 A
■
With optional settling time of 1 ms ≤ (power supply - 11.5 V) / 0.023 A
■
Voltage output > maximum output voltage / 1 mA
■
Ratiometric output > 4.5k
Switch-on time 150 ms
Switch-on drift 5 s (60 s with optional zero point adjustment 0.1 %)
Voltage supply See product label or test report
Dissipation loss
■
Current output 828 mW (22 mW/K derating of the dissipation loss with ambient temperatures ≥ 100 °C
(212 °F))
■
Voltage output 432 mW
Current supply External circuits connected to the electrical outputs of the transmitter must be energy-limited
electrical circuits in accordance with section 9.4 of UL/EN/IEC 61010-1, or an LPS to UL/EN/
IEC 60950-1, or class 2 in accordance with UL1310/UL1585 (NEC or CEC). External circuits
must be suitable for operation above 2,000 m should the transmitter be used at this altitude.
■
Current output Current signal, max. 25 mA
■
Voltage output Max. 12 mA
Non-linearity (per IEC 61298-2) See test report
Relationship to the mounting position For measuring ranges < 1 bar (15 psi), an additional zero oset of up to 0.15 % applies
4. Specications of the transmitter 8325-S, ≥ 0,4 bar

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Specications
Non-repeatability ≤ ±0.1 % of span
Temperature hysteresis 0.1 % of span at > 80 °C (176 °F)
Long-term drift (per IEC 61298-2) ≤ ±0.1 % of span
≤ ±0.2 % of span (with special measuring ranges and measuring ranges < 1 bar (15 psi))
Temperature error For calibration temperature 15 ... 25 °C (59 ... 77 °F)
–20 ... +80 °C: ≤1 % of span
–30 ... +100 °C: ≤1.5 % of span
For measuring ranges < 1 bar (15 psi), special measuring ranges and instruments with an
increased overpressure limit the respective temperature error increases by 0.5 % of span
Derating for cooling elements
■
Max. permissible ambient tempera-
ture
Tamb (Tmed < 125 °C) = 125 °C
Tamb (Tmed ≥ 125 °C) = –0.62 x Tmed + 202 °C
■
Max. permissible medium tempera-
ture
Tmed (Tamb < 80 °C) = 200 °C
Tmed (Tamb ≥ 80 °C) = –1.61 x T
amb + 326 °C
Tamb = Ambient temperature [°C]
Tmed = Medium temperature [°C]
Storage and transport conditions
■
Permissible temperature range –40 ... +70 °C (–40 ... +158 °F)
■
Maximum humidity (per IEC 68-2-78) 67 % r. h. at 40 °C (104 °F) (in accordance with 4K4H per EN 60721-3-4)
Climate class For indoor and outdoor use. Protect the instrument from direct sunlight.
■
Storage 1K3 (per EN 60721-3-1)
■
Transport 2K3 (per EN 60721-3-2)
■
Operation 4K4H (per EN 60721-3-4, without condensation or icing)
Vibration resistance (per IEC 68-2-6) 20 g, 10 ... 2,000 Hz (40 g, 10 ... 2,000 Hz for circular connector M12 x 1, metallic)
For instruments with cooling elements a limited vibration resistance of 10 g, 10 ... 2,000 Hz,
applies.
Continuous vibration resistance (per
IEC 68-2-6)
10 g
Shock resistance (per IEC 68-2-27) 100 g, 6 ms (500 g, 1 ms for heavy-duty connector)
Service life 100 million load cycles (10 million load cycles for measuring ranges > 600 bar/7,500 psi)
Free-fall test (following IEC 60721-3-2)
■
Individual packaging 1.5 m (5 ft)
■
Multiple packaging 0.5 m (1.6 ft)
■
PE bag 0.5 m (1.6 ft)
4. Specications of the transmitter 8325-S, ≥ 0,4 bar
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Specications
Electrical protective measures The electrical protective measures are not valid for ratiometric output signals.
■
Short-circuit resistance S+ vs. U–
■
Reverse polarity protection U+ vs. U–
■
Resistance to overvoltage 40 V DC
■
Insulation voltage 750 V DC
Materials of wetted parts
■
Relative measuring ranges Measuring ranges ≤ 10 bar (150 psi): 316L
Measuring ranges > 10 bar (150 psi): 316L + 13-8 PH
■
Absolute measuring ranges Measuring ranges ≤ 1,000 bar (10,000 psi): ASTM 630 and 13-8 PH
Measuring ranges > 1,000 bar (10,000 psi): 316L + 13-8 PH
Materials of non-wetted parts
■
Case 316 Ti
■
Zero point adjustment ring PBT/PET GF30
■
Angular connector DIN 175301-803 A PBT/PET GF30
■
Angular connector DIN 175301-803 C PBT/PET GF30
■
Circular connector M12 x 1 (4-pin) PBT/PET GF30
■
Circular connector M12 x 1 (4-pin,
metallic)
316L
■
Field case 316L, 316Ti
■
Heavy-duty connector 316L
■
Cable outlet IP 67 PA66, PBT/PET GF30
■
Cable outlet ½ NPT conduit 316L
■
Cable outlet IP 68 316L
■
Cable outlet IP 68, FEP 316L
■
Cable outlet IP 6K9K 316L
CE conformity
■
Pressure equipment directive
■
EMC directive, EN 61326 emission (group 1, class B) and interference immunity (indus-
trial application)
■
EM eld 30 V/m (80 ... 1,000 Mhz)
4. Specications of the transmitter 8325-S, ≥ 0,4 bar

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Specications
Approvals See product label
Dimensions Spanner width: 24 mm
Diameter: 26.7 mm
Length: 53 ... 105 mm, with cooling element additional 73 mm
Weight Approx. 150 g (0.331 lbs), with cooling element approx. 350 g (0.794 lbs)
Electrical connections
Electrical connection Ingress
protection 2)
Wire cross-
section
Cable ∅ Cable
material
Permissible temperature
Angular connector DIN EN 175301-803 A
with mating connector IP65 max. 1.5 mm² 6 ... 8 mm - –30 ... +100 °C
(–22 ... +212 °F)
with mating connector (conduit) IP65 max. 1.5 mm² - - –30 ... +100 °C
(–22 ... +212 °F)
with mating connector with
moulded cable
IP65 3 x 0.75 mm² 6 mm PUR –30 ... +100 °C
(–22 ... +212 °F
with mating connector with
moulded cable, shielded
IP65 6 x 0.5 mm² 6.8 mm PUR –25 ... +85 °C
(–4 ... +185 °F)
Angular connector DIN EN 175301-803 C
with mating connector IP65 max. 0.75 mm² 4.5 ... 6 mm - –30 ... +100 °C (–22 ... +212 °F)
with mating connector with
moulded cable
IP65 4 x 0.5 mm² 6.2 mm PUR –25 ... +85 °C
(–4 ... +185 °F)
Circular connector M12 x 1 (4-pin)
without mating connector IP67 - - - –30 ... +100 °C
(–22 ... +212 °F)
4. Specications of the transmitter 8325-S, ≥ 0,4 bar
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Bürkert Operating Instructions - Pressure transmitter Type 8325
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Electrical connection Ingress
protection 2)
Wire cross-
section
Cable ∅ Cable
material
Permissible temperature
with mating connector, straight,
with moulded cable
IP67 3 x 0.34 mm² 4.3 mm PUR –25 ... +80 °C
(–4 ... +176 °F)
with mating connector, straight,
with moulded cable, shielded
IP67 3 x 0.34 mm² 4.3 mm PUR –25 ... +80 °C
(–4 ... +176 °F)
with mating connector, angled,
with moulded cable
IP67 3 x 0.34 mm² 5.5 mm PUR –25 ... +80 °C
(–4 ... +176 °F)
2) Only applies when plugged in using a suitable mating connector that has the appropriate ingress protection
Electrical connection Ingress
protection 2)
Wire cross-
section
Cable ∅ Cable
material
Permissible temperature
Circular connector M12 x 1 (4-pin, metallic)
without mating connector IP67 - - - –40 ... +125 °C
(–40 ... +257 °F)
with mating connector, straight, with
moulded cable
IP67 3 x 0.34 mm² 4.3 mm PUR –25 ... +80 °C
(–4 ... +176 °F)
with mating connector, straight, with
moulded cable, shielded
IP67 3 x 0.34 mm² 4.3 mm PUR –25 ... +80 °C
(–4 ... +176 °F)
with mating connector, angled, with
moulded cable
IP67 3 x 0.34 mm² 5.5 mm PUR –25 ... +80 °C
(–4 ... +176 °F)
Field case
IP6K9K - - - –25 ... +100 °C
(–4 ... +212 °F)
Cable outlet
Cable outlet IP 67 IP67 3 x 0.34 mm² 5.5 mm PUR –30 ... +100 °C
(–22 ... +212 °F)
Cable outlet ½ NPT conduit IP67 6 x 0.35 mm² 6.1 mm PUR –30 ... +100 °C
(–22 ... +212 °F)
Cable outlet IP 68 IP68 6 x 0.35 mm² 6.1 mm PUR –30 ... +125 °C
(–22 ... +257 °F)
Cable outlet IP 68, FEP IP68 6 x 0.39 mm² 5.8 mm FEP –40 ... +125 °C
(–40 ... +257 °F)
4. Specications of the transmitter 8325-S, ≥ 0,4 bar

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Electrical connection Ingress
protection 2)
Wire cross-
section
Cable ∅ Cable
material
Permissible temperature
Cable outlet IP 6K9K IP6K9K 6 x 0.35 mm² 6.1 mm PUR –30 ... +125 °C
(–22 ... +257 °F)
Heavy-duty connector
with mating connector with cable IP68 6 x 0.14 mm² 6.5 mm PUR –40 ... +125 °C
(–40 ... +257 °F)
2) Only applies when plugged in using a suitable mating connector that has the appropriate ingress protection
For further specications, please refer to the technical datasheet, available at www.burkert.com, or contact your local
Bürkert sales oce.
4. Specications of the transmitter 8325-S, ≥ 0,4 bar
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
5. Specications of the transmitter 8325-F, ush diaphragm
5.1 Measuring range
See product label
5.2 Vacuum tightness
Yes
5.3 Output signals
Signal type Signal
Current (2-wire) 4 ... 20 mA
Current (3-wire) 0 ... 20 mA
Voltage (3-wire) 0 ... 10 V DC
0 ... 5 V DC
Depending on the signal type the following loads apply:
Signal type Load in Ω
Current (2-wire) ≤ (power supply - 10 V) / 0.02 A
Current (3-wire) ≤ (power supply - 3 V) / 0.02 A
Voltage (3-wire) > maximum output signal / 1 mA
5.4 Voltage supply
Power supply
The permissible power supply depends on the corresponding output signal.
Output signal Power supply
4 ... 20 mA (2-wire) 10 ...30 V DC
0 ... 20 mA (3-wire) 10 ...30 V DC
0 ... 10 V DC 14 ... 30 V DC
0 ... 5 V DC 10 ...30 V DC
5. Specications of the transmitter 8325-F, ush diaphragm

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
5.5 Accuracy
Accuracy at room temperature
■
Standard: ≤ ±0.5 % of span
■
Option: ≤ ±0.25 % of span 1)
1) Only for measuring ranges ≥ 0.25 bar
Including non-linearity, hysteresis, zero oset and end value deviation (corresponds to measured error per IEC 61298-2).
Calibrated in vertical mounting position with process connection facing downwards.
Non-linearity (per IEC 61298-2)
≤ ±0.2 % of span BFSL
Non-repeatability
≤ ±0.1 % of span
Temperature error in rated temperature range
Nominal temperatur: 0 ... 80 °C
Mean temperature coecient of zero point
■
≤ 0.2 % of span/10 K
■
< 0.4 % of span/10 K 1)
1) Applies to measuring ranges ≤ 0,25 bar
Mean temperature coecient of span
■
≤ 0.2 % of span/10 K
Settling time
≤ 2 ms
Long-term drift
≤ ±0.2 % of span/yearAdjustability of zero point and span 1)
5. Specications of the transmitter 8325-F, ush diaphragm
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Adjustment of zero point and span 1)
Adjustment is made using potentiometers inside the instrument.
Zero point ± 5 %
Span ± 5 %
1) Adjustment not possible for cable outlet with ingress protection IP 68
5.6 Operating conditions
Ingress protection (per IEC 60529)
The ingress protection depends on the type of electrical connection.
Electrical connection Ingress protection
Angular connector DIN 175301-803 A IP 65
Circular connector M12 x 1 (4-pin) IP 67
Cable outlet
■
Standard IP 67
■
Option IP 68 1)
1) Adjustability of zero point and span not possible
The stated ingress protection only applies when plugged in using mating connectors that have the appropriate ingress
protection.
Vibration resistance
■
Process connections without cooling element
20 g (IEC 60068-2-6, under resonance)
■
Process connections with cooling element
10 g (IEC 60068-2-6, under resonance)
Shock resistance
■
Process connections without cooling element
1,000 g (IEC 60068-2-27, mechanical)
■
Process connections with cooling element
400 g (IEC 60068-2-27, mechanical)
5. Specications of the transmitter 8325-F, ush diaphragm

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Permissible temperature ranges
Process connections without cooling element Process connections with cooling element
Ambient –20 ... +80 °C Ambient –20 ... +80 °C
Storage –40 ... +100 °C Storage –40 ... +100 °C
Medium 1) Medium 1) 2) –20 ... +150 °C
■
Standard –30 ... +100 °C
■
Option –30 ... +125 °C
1) For measuring ranges 0 ... 400 and 0 ... 600 bar, the medium temperature is limited to –30 ... +70 °C.
2) In vertical mounting position the measuring point must be insulated in order to avoid inuences of heat radiation and convection.
5.7 Electrical protective measures
Short-circuit resistance
S+vs. U–
Reverse polarity protection
U+vs. U–
Overvoltage protection
36 V DC
Insulation voltage
500 V DC with NEC class 02 voltage supply (low voltage and low current max. 100 VA even under fault conditions).
5.8 Process connections
Process connection Available measuring ranges
G ½ B ush 0 ... 2.5 to 0 ... 600 bar
G 1 B ush 0 ... 0.1 to 0 ... 1.6 bar
Hygienic G 1 B ush 0 ... 0.1 to 0 ... 25 bar
5. Specications of the transmitter 8325-F, ush diaphragm
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
5.9 Materials
Wetted parts
■
Stainless steel
■
For sealing materials see table
Process connection Standard Option
without cooling element NBR
■
FPM/FKM
■
EPDM
with cooling element FPM/FKM EPDM
Hygienic EPDM -
Non-wetted parts
Internal system ll uid
■
Standard: Synthetic oil
■
Option: Food-compatible system ll uid per FDA 21 CFR 178.3750
CE conformity
■
EMC directive 2004/108/EC, EN 61326 emission (group 1, class B) and immunity (industrial application)
■
Pressure equipment directive
For further specications, please refer to the technical datasheet, available at www.burkert.com, or contact your local
Bürkert sales oce.
5. Specications of the transmitter 8325-F, ush diaphragm

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
6. Specications of the transmitter 8325-L, < 0,4 bar
Specications
Measuring range See product label
Vacuum tightness Yes
Output signal
Output signal see product label
Load 4 ... 20 mA (2-wire) ≤ (power supply - 10 V) / 0.02 A
20 ... 4 mA (2-wire)
0 ... 20 mA (3-wire) ≤ (power supply - 3 V) / 0.02 A
0 ... 10 V DC (3-wire) > max. output signal / 1 mA
0 ... 5 V DC (3-wire)
1 ... 5 V DC (3-wire)
0.5 ... 4.5 V DC ratiometric (3-wire)
Voltage supply
Power supply see product label
The power supply for the transmitter must be made via an energy-limited electrical circuit
in accordance with section 9.3 of UL/EN/IEC 61010-1, or an LPS per UL/EN/IEC 60950-1,
or class 2 in accordance with UL1310/UL1585 (NEC or CEC). The voltage supply must be
suitable for operation above 2,000 m should the transmitter be used at this altitude.
Accuracy specications
Non-linearity (per IEC 61298-2) ≤ ±0.2 % of span BFSL
Non-repeatability ≤ ±0.1 % of span
Accuracy at reference conditions see product label
Adjustability of zero point and span ±5 %
6. Specications of the transmitter 8325-L, < 0,4 bar
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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Specications
Temperature error at 0 ... 80 °C Mean temperature coecient of zero point Measuring ranges ≤ 0.25 bar:
≤ 0.4 % of span/10 K
Measuring ranges > 0.25 bar
≤ 0.2 % of span/10 K
Mean temperature coecient of span: ≤ 0.2 % of span/10 K
Long-term stability at reference conditions ≤ ±0.2 % of span/year
Reference conditions
Ambient temperature 15 ... 25 °C
Atmospheric pressure 860 ... 1,060 mbar
Humidity 45 ... 75 % r. h.
Power supply 24 V DC
Mounting position Calibrated in vertical mounting position with process connection facing downwards.
Time response
Settling time ≤ 1 ms
≤ 2 ms for output signal 0.5…4.5 V DC ratiometric and measuring ranges < 400 mbar, 10 psi
Operating conditions
Ingress protection The stated ingress protection only applies when plugged in using mating connectors that
have the appropriate ingress protection.
Angular connector DIN 175301-803 A IP65
Angular connector DIN 175301-803 with ½ NPT IP65
Circular connector M12 x 1 (4-pin) IP67
½ NPT conduit male, with cable outlet IP67
Cable outlet (standard) IP67
Cable outlet (not adjustable) IP68
Cable outlet (adjustable) IP68
6. Specications of the transmitter 8325-L, < 0,4 bar

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Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Specications
Shock resistance 1,000 g (IEC 60068-2-27, mechanical)
Vibration resistance 20 g (per IEC 60068-2-6)
Permissible temperature ranges Medium: –30 ... +100 °C (option: –40 ... +125 °C)
Ambient: –20 ... +80 °C
Storage: –40 ... +100 °C
Pollution degree max. 3
Humidity ≤ 80 % r. h. (non-condensing)
Electrical protective measures
Short-circuit resistance S+ vs. U–
Reverse polarity protection U+ vs.U–
Insulation voltage 500 V DC
Materials
Wetted parts Stainless steel
Non-wetted parts Case Stainless steel
Internal pressure transmission medium Synthetic oil
Instruments with a measuring range
of > 25bar relative do not contain any
pressure transmission medium (dry
measuring cell).
Clamping nut PA
Angular connector PA
O-rings at the clamping nut NBR
Flat gasket VMQ
CE conformity
Pressure equipment directive
6. Specications of the transmitter 8325-L, < 0,4 bar
24
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Specications
RoHS directive
EMC directive, EN 61326 emission (group 1, class B) and interference immunity (industrial application)
The existence of strong electromagnetic elds in a frequency range of < 2.7GHz can result in increased measuring errors up to 1%.
Do not install the instruments in the vicinity of strong electromagnetic sources of interference (e.g. transmitting devices, radio equip-
ment), or use sheath current lters where applicable.
For further specications, please refer to the technical datasheet, available at www.burkert.com, or contact your local
Bürkert sales oce.
7. Design and function
7.1 Description
The prevailing pressure is measured at the sensor element through the deformation of a diaphragm. By supplying
power, this deformation of the diaphragm is converted into an electrical signal. The output signal from the transmitter is
amplied and standardised. The output signal is proportional to the measured pressure.
7.2 Scope of delivery
■
Pressure transmitter
■
Test report
■
Certicates (option)
■
Mating connector (option)
Cross-check scope of delivery with delivery note.
8. Transport, packaging and storage
8.1 Transport
Check the transmitter for any damage that may have been caused during transportation.
Obvious damage must be reported immediately.
8.2 Packaging
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g. change in installation site, sending for repair).
7. Design and function

25
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
8.3 Storage
Permissible conditions at the place of storage:
Storage temperature Humidity
Pressure transmitter 8325-S, ≥ 0,4 bar –40 ... +70 °C 67 % relative humidity (no condensation)
Pressure transmitter 8325-F, ush diaphragm –40 ... +100 °C 45 ... 75 % relative humidity
Pressure transmitter 8325-L, < 0,4 bar –40 ... +100 °C 45 ... 75 % relative humidity (no condensation)
Avoid exposure to the following factors:
■
Direct sunlight or proximity to hot objects
■
Mechanical vibration, mechanical shock (putting it down hard)
■
Soot, vapour, dust and corrosive gases
■
Humid or wet environment
■
Potentially explosive environments, ammable atmospheres
Store the transmitter in its original packaging in a location that fulls the conditions listed above.
If the original packaging is not available, pack and store the instrument as described below:
1. Place the protection cap on the process connection
2. Place the instrument, along with shock-absorbent material, in the packaging.
WARNING!
Before storing the instrument (following operation), remove any residual media.
This is of particular importance if the medium is hazardous to health, e.g. caustic, toxic, carcinogenic,
radioactive, etc.
8. Transport, packaging and storage
26
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
9. Commissioning, operation
CAUTION!
Prior to commissioning, the transmitter must be subjected to a visual inspection.
■
Leaking uid is indicative of damage.
■
For the transmitter 8325-F, ush diaphragm, check the diaphragm of the process connection for any
damage.
■
Only use the transmitter if it is in perfect condition with respect to safety.
9.1 Mechanical mounting
Only use original accessories. For accessories, please contact your local Bürkert sales oce.
9.1.1 Sealing the process connection
WARNING!
Risk of burns!
The cooling element can be hot as a result of previous use. Allow the cooling element to cool beforehand.
The sealing faces at the instrument have to be undamaged and clean.
per EN 837 per DIN 3852-E
Parallel threads


NPT, R and PT
Tapered threads
Correct sealing of the process connections with parallel
threads at the sealing face must be made using
suitable at gaskets, sealing rings or prole sealings.
For sealing process connections with tapered threads,
the sealing must be made in the threads using additional
sealing material, e.g. PTFE tape (EN 837-2).
For further information on seals, please contact your local Bürkert sales oce.
9. Commissioning, operation

27
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
9.1.2 Installing the instrument
WARNING!
Risk of burns!
The cooling element can be hot as a result of previous use. Allow the cooling element to cool beforehand.
■
Remove the protection cap not until shortly before installation.
■
Ensure that the diaphragm of the process connection is not
damaged during installation.
■
When screwing the instrument in, the force required to do this
must not be applied through the case or the cap ring, but only
through the spanner ats provided for this purpose and using a
suitable tool.
■
When there is a cooling element, the lower hexagon should be
used for tightening (see gure “Mounting a cooling element”)
■
The correct torque depends on the dimensions of the process
connection and the gasket used (form/material).
■
When screwing in, do not cross the threads.
■
For heat dissipation, the cooling element must not be insulated.
■
If the instrument is mounted upside down, it must be ensured that
no water can collect on the electrical connection and on the cap
ring. Water can block the pressure compensation diaphragm.
For information on tapped holes and welding sockets,
please contact your local Bürkert sales oce.
Spanner ats
Cap ring
Electrical
connection
Type 8325 without cooling element
Mounting a cooling element
9. Commissioning, operation
28
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
9.1.3 Fitting a DIN 175301-803 angular connector
1. Loosen the screw (1).
2. Loosen the cable gland (2).
3. Pull the angled socket (5) + (6) away from the instrument.
CAUTION
Improper mounting
The seal of the angle housing will be damaged.
Do not try to push the terminal block (6) out using the screw hole
(1) or the cable gland (2).
4. Via the mounting hole (8), lever the terminal block (6) out of the case (5).
5. Slide the cable with the appropriate cable outer diameter (see
chpt. 9.2.2 Connection diagrams) through the cable gland (2), ring (3),
sealing (4) and the case (5).
6. Connect the cable ends to the connection terminals on the terminal
block (6) in accordance with the pin assignment (see chpt. 9.2.2 Connection
diagrams for the pin assignment).
7. Press the terminal block (6) into the case (5).
8. Tighten the cable gland (2) around the cable. Make sure that the cable
gland and seal are not damaged and that they are assembled correctly in
order to ensure ingress protection.
9. Place the at, square gasket (7) over the transmitter‘s connection pins.
10. Slide the assembled angled socket (5) + (6) onto the transmitter‘s
connection pins.
11. Using the screw (1), screw the angled socket to the transmitter, hand-
tight.







Mounting hole
9. Commissioning, operation

29
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
9.2 Electrical mounting
Only use original accessories. For original accessories, please contact your local Bürkert sales oce.
WARNING!
The instrument shield does not act as a protective conductor for protection of personnel, rather as a
functional ground in order to shield the instrument from electromagnetic elds.
9.2.1 Connection assembly
■
For instruments with ratiometric or voltage output, a shielded cable must be used.The cable shield must be
grounded, if the cable is longer than 30 m or leaves the building.
■
Use a cable with suitable characteristics for the particular operating conditions.
■
For cable variants, strain relief must be employed.
■
Cable with ventilation tubes must be vented to atmosphere.
■
The instrument must be earthed via the process connection!
■
Select a cable diameter that matches the cable gland of the plug. Make sure that the cable gland of the mounted
plug has a tight t and that the seals are present and undamaged. Tighten the threaded connection and check that
the seal is correctly seated, in order to ensure a tight seal.
■
For cable outlets, make sure that no moisture enters at the cable end.
■
Pin assignment: see test report and chapter 9.2.2 Connection diagrams.
9. Commissioning, operation
30
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
9.2.2 Connection diagrams
Angular connector DIN 175301-803 A Heavy-duty connector
2-wire 3-wire 2-wire 3-wire
1
2
3
U+1 1 U+1 1
U-2 2 U-2 2
S+- 3 S+- 3
Shield
(option) 4 4 Shield Case Case
Angular connector DIN 175301-803 C Circular connector M12 x 1 (4-pin)
2-wire 3-wire 2-wire 3-wire
U+1 1
43
12
U+1 1
U-2 2 U-3 3
S+- 3 S+- 4
Shield
(option) 4 4 Shield
(option) Case Case
Field case
2-wire 3-wire
U+1 1
U-2 2
S+- 3
Shield 5 5
Wire cross-section max. 1.5 mm2
Cable diameter 6 ... 8 mm
9. Commissioning, operation

31
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Cable outlet for transmitter 8325-S, ≥ 0,4 bar Cable outlet for transmitter 8325-L, < 0,4 bar and
for transmitter 8325-F, ush diaphragm
2-wire 3-wire 2-wire 3-wire
U+brown (BN) brown (BN) U+brown (BN) brown (BN)
U-blue (BU) blue (BU) U-green (GN) green (GN)
S+-black (BK) S+- white (WH)
Shield 1) grey (GY) grey (GY) Shield 1) grey (GY) grey (GY)
1) With cable outlet IP 67 and cable outlet ½ NPT conduit the shield is optional.
Mating connector with moulded cable
2-wire 3-wire
U+brown (BN) brown (BN)
U-blue (BU) blue (BU)
S+-black (BK)
Cable outlet (US code)
2-wire 3-wire
U+red (RD) red (RD)
U-black (BK) black (BK)
S+- white (WH)
Shield 1) grey (GY) grey (GY)
Wire cross-section 3 x 0.5 mm2
Cable diameter 6.8 mm
Cable lengths 1.5 m, 3 m, 5 m, 10 m, 15 m
U+ Positive power supply terminal
U- Negative power supply terminal
S+ Analogue output
Other pin assignements on request.
Electrical protective measures
The electrical protective measures are not valid for
ratiometric output signals.
■
Short-circuit resistance: S+vs. U-
■
Reverse polarity protection: U+vs. U-
■
Resistance to overvoltages: 40 V DC
■
Insulation voltage: 750 V DC
9.2.3 Setting up a voltage supply
The voltage supply is made via a power supply unit or a control unit which provides the energy limitation.
The power supply for the transmitter must be made via an energy-limited electrical circuit in accordance with section
9.4 of UL/EN/IEC 61010-1, or an LPS to UL/EN/IEC 60950-1, or class 2 in accordance with UL1310/UL1585 (NEC or
CEC).The power supply must be suitable for operation above 2,000 m should the transmitter be used at this altitude.
9. Commissioning, operation
32
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
10. Zero point adjustment and span
10.1 Zero point adjustement for the transmitter 8325-S, ≥ 0,4 bar
1
1
2
120° → ±0,05%
max. ±10%
±0,05%
±0,05%
±0,05%
–
+
2
3
3
4
4
10. Zero point adjustment and span

33
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
10.2 Zero point adjustment and span of transmitter 8325-F, ush diaphragm and of transmitter 8325-L, < 0,4 bar
Only adjust the span-setting potentiometer if calibration equipment is available which has at least three
times the accuracy of the transmitter.
10.3 Preparation (gure A)
To gain access to the potentiometers, open the instrument as follows:
■
Disconnect the electrical connection (1) from the instrument.
■
Remove the clamping nut (2).
■
Carefully pull the instrument connector (3) from the instrument.
■
Connect the instrument connector (3) to the power supply and a display
unit (e.g. ammeter, voltmeter) according to the connection diagram.
10.4 Adjustment of zero point (gure B)
■
Go to the start of the measuring range.
■
Using potentiometer “Z”, adjust the minimum output signal (e.g. 4 mA)
10.5 Setting the span (gure B)
■
Go to the end of the measuring range.
■
Using potentiometer “S”, adjust the maximum output signal (e.g. 20 mA)
■
Check the zero point and if there is any deviation, re-adjust it.
■
Repeat the procedure until the zero point and the span are set
correctly.
10.6 Finish the adjustment (gure A) (only transmitter 8325-F, ush
diaphragm and transmitter 8325-L, < 0,4 bar)
■
Disconnect the instrument connector (3) from the power supply and
the display unit.
■
Carefully push the instrument connector (3) onto the instrument, without
damaging the wires or the seals.The seals must be clean and undam-
aged in order to guarantee the given ingress protection.
■
Tighten the clamping nut (2).
After the adjustment, check that the system is functioning correctly.
Recommended recalibration cycle: 1 year



A
B
10. Zero point adjustment and span
34
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
11. Maintenance and cleaning
11.1 Maintenance
This transmitter is maintenance-free.
Repairs must only be carried out by the manufacturer.
11.2 Cleaning
CAUTION!
■
Before cleaning, correctly disconnect the transmitter from the pressure supply, switch it o and discon-
nect it from the voltage supply.
■
Do not use any pointed or hard objects for cleaning, as they may damage the diaphragm of the process
connection.
■
Clean the instrument with a moist cloth.
■
Electrical connections must not come into contact with moisture.
■
Wash or clean the dismounted instrument before returning it, in order to protect persons and the environ-
ment from exposure to residual media.
■
Residual media in dismounted instruments can result in a risk to persons, the environment and
equipment. Take sucient precautionary measures.
CAUTION!
Unsuitable cleaning agents
Cleaning with unsuitable cleaning agents may damage the instrument and the product label.
■
Do not use any aggressive cleaning agents.
■
Do not use any hard or pointed objects.
■
Do not use any abrasive cloths or sponges.
Suitable cleaning agents
■
Water
■
Conventional dishwashing detergent
Cleaning the instrument
1. Depressurise and de-energise the transmitter.
2. Wipe the instrument surface using a soft, damp cloth.
For information on returning the instrument see chapter 13.2 Return.
11. Maintenance and cleaning

35
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
12. Faults
CAUTION!
Physical injuries and damage to property and the environment
If faults cannot be eliminated by means of the listed measures, the transmitter must be taken out of opera-
tion immediately.
■
E nsure that pressure or signal is no longer present and protect against accidental commissioning.
■
Contact the manufacturer.
■
If a return is needed, please follow the instructions given in chapter 13.2 Return.
WARNING!
Physical injuries and damage to property and the environment caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, ammable or toxic substances), harmful
media (e.g. corrosive, toxic, carcinogenic, radioactive), and also with refrigeration plants and compressors,
there is a danger of physical injuries and damage to property and the environment.
■
Wash or clean the dismounted instrument before returning it, in order to protect persons and the environ-
ment from exposure to residual media.
■
Should a failure occur, aggressive media with extremely high temperature and under high pressure or
vacuum may be present at the instrument.
■
For these media, in addition to all standard regulations, the appropriate existing codes or regulations
must also be followed.
■
Wear the requisite protective equipment.
In the event of any faults, rst check whether the transmitter is mounted correctly, mechanically and electrically.
12. Faults
36
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
Faults Causes Measures
Plastic has faded UV radiation No measures required
Discolouration is harmless
No output signal Cable break Check the continuity or check the through drill-
ing, and if necessary exchange the cable
No/wrong power supply Correct the power supply
No/wrong output signal Wiring error Rectify the wiring
Constant output signal upon change in
pressure
Mechanical overload caused by overpres-
sure
Replace instrument;
if it fails repeatedly, contact the manufacturer
Signal span too small/drops Mechanical overload caused by overpres-
sure
Replace instrument;
if it fails repeatedly, contact the manufacturer
Diaphragm damaged, e.g. due to impacts,
abrasive/aggressive medium; corrosion at
diaphragm or process connection; transmis-
sion medium missing
Replace instrument;
if it fails repeatedly, contact the manufacturer
Sealing/sealing face damaged/soiled,
sealing does not have a tight t, threads
jammed
Clean the sealing/sealing face, replace sealing
if applicable
Signal span varies/inaccurate EMC interference sources in the environ-
ment (e.g. frequency converter)
Shield instrument; cable shield;
Remove source of interference
Operating temperature too high/low Decrease/increase the temperature and observe
the permissible temperatures
Instrument not grounded Grounded the instrument
Strongly varying pressure of the process
medium
Damping; consult the manufacturer
Deviating zero point signal Operating temperature too high/low Decrease/increase the temperature and observe
the permissible temperatures
Other mounting position Adjust the zero point
Overpressure limit exceeded Reduce the pressure
Overload safety exceeded Observe the permissible overload safety
12. Faults

37
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
CAUTION!
If faults cannot be eliminated by means of the measures listed above, shut down the transmitter
immediately, ensure that pressure and/or signal are no longer present, secure the instrument from being put
back into operation inadvertently.
In this case, contact the manufacturer. If a return is needed, please follow the instructions given in chapter
13.2 Return.
13. Dismounting, return and disposal
WARNING!
Residual media in dismounted transmitters can result in a risk to persons, the environment and equipment.
Take sucient precautionary measures.
13.1 Dismounting
WARNING!
Risk of burns!
Let the instrument cool down suciently before dismounting!
During dismounting there is a risk of dangerously hot pressure media escaping.
When removing the instrument, the force required to do this must not be applied through the case or the cap ring,
but only through the spanner ats provided for this purpose and using a suitable tool (see chapter 9.1.2 Installing the
instrument).
When there is a cooling element, the lower hexagon should be used for unscrewing (see chapter 9.1.2 Installing the
instrument)
Only disconnect the transmitter once the system has been depressurised!
13. Dismounting, return and disposal
38
Bürkert Operating Instructions - Pressure transmitter Type 8325
EN
13.2 Return
WARNING!
Absolutely observe when shipping the transmitter:
All returned transmitters must be free from any kind of hazardous substances (acids, bases, solutions, etc.).
When returning the instrument, use the original packaging or a suitable transport package.
Label the shipment as transport of a highly-sensitive measuring instrument in order to avoid any damage.
For information on returns, please contact your local Bürkert sales oce.
13.3 Disposal
Incorrect disposal can put the environment at risk.
Dispose of instrument components and packaging materials in an environmentally compatible way and in accordance
with the country-specic waste disposal regulations.
14. Accessories for the transmitter 8325-F, ush diaphragm
Description Article no.
Weld-on socket for standard ush diaphragm, version G ½" 443295
Weld-on socket for standard ush diaphragm, G 1" 444137
Weld-on socket for hygienic ush diaphragm, G 1" 443296
15. Declaration of conformity
For the declaration of conformity please contact your local Bürkert sales oce.
13. Dismounting, return and disposal

113
Bürkert Operating Instructions - Pressure transmitter Type 8325
114
Bürkert Operating Instructions - Pressure transmitter Type 8325
Burkert locations / Bürkert Standorte
Germany
Headquarter and Service Center www.buerkert.com
Bürkert GmbH & Co. KG
Christian-Bürkert-Straße 13-17
D-74653 Ingelngen
Ph: [phone]
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E-mail: [email protected]
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