WIKA PSD-30 Operating Manual
Operating instructions
Betriebsanleitung
Mode d'emploi
Manual de instrucciones
Pressure switch model PSD-3x
Druckschalter Typ PSD-3x
Pressostat type PSD-3x
Presostato modelo PSD-3x
Pressure switch model PSD-30
EN
DE
FR
ES
EN
Operating instructions model PSD-3x Page 3 - 32
DE
Betriebsanleitung Typ PSD-3x Seite 33 - 62
FR
Mode d'emploi type PSD-3x Page 63 - 92
ES
Manual de instrucciones modelo PSD-3x Página 93 - 122
© 2010 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA® is a registered trademark in various countries.
WIKA® ist eine geschützte Marke in verschiedenen Ländern.
Prior to starting any work, read the operating instructions!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung lesen!
Zum späteren Gebrauch aufbewahren!
Lire le mode d'emploi avant de commencer toute opération !
A conserver pour une utilisation ultérieure !
¡Leer el manual de instrucciones antes de comenzar cualquier trabajo!
¡Guardar el manual para una eventual consulta posterior!
2 WIKA operating instructions pressure switch, model PSD-3x
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Contents
Contents
1. General information 4
2. Safety 6
3. Specications 9
4. Design and function 18
5. Transport, packaging and storage 18
6. Commissioning, operation 19
7. Maintenance and cleaning 28
8. Faults 29
9. Dismounting, return and disposal 31
Appendix 1: EC Declaration of Conformity for model PSD-3x 32
EN
Declarations of conformity can be found online at www.wika.com.
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3WIKA operating instructions pressure switch, model PSD-3x
1. General information
1. General information
■
The pressure switch described in the operating instructions has been designed and manufactured
EN
using state-of-the-art technology. All components are subject to stringent quality and environmental
criteria during production. Our management systems are certied to ISO 9001 and ISO 14001.
■
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.
■
Skilled personnel must have carefully read and understood the operating instructions, prior to
beginning any work.
■
The manufacturer's liability is void in the case of any damage caused by using the product contrary
to its intended use, non-compliance with these operating instructions, assignment of insuciently
qualied skilled personnel or unauthorised modications to the instrument.
■
The general terms and conditions contained in the sales documentation shall apply.
■
Subject to technical modications.
■
Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: PE 81.67
- Application consultant:
Tel.: (+49) 9372/132-8976
E-mail: support-tronic@wika.de
4 WIKA operating instructions pressure switch, model PSD-3x
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1. General information
Explanation of symbols
WARNING!
... indicates a potentially dangerous situation which can result in serious injury or death if not
avoided.
CAUTION!
... indicates a potentially dangerous situation which 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 ecient and trouble-free
operation.
Abbreviations
U
+
U- Negative power terminal
S
+
SP1 Switch point 1
SP2 Switch point 2
C Communication with IO-Link
MBA Start of measuring range
MBE End of measuring range
Positive power terminal
Analogue output
EN
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5WIKA operating instructions pressure switch, model PSD-3x
2. Safety
2. Safety
WARNING!
EN
2.1 Intended use
The pressure switch is used to convert pressure into an electrical signal indoors and outdoors.
The instrument has been designed and built solely for the intended use described here, and may only
be used accordingly.
The technical specications contained in these operating instructions must be observed. Improper
handling or operation of the instrument outside of its technical specications requires the instrument to
be taken out of service immediately and inspected by an authorised WIKA service engineer.
The manufacturer shall not be liable for claims of any type based on operation contrary to the intended
use.
Before installation, commissioning and operation, ensure that the appropriate pressure
switch has been selected in terms of measuring range, design and specic 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 Chapter 3 "Specications".
■
Always operate the pressure switch within the overpressure safety range.
Further important safety instructions can be found in the individual chapters of these
operating instructions.
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2. Safety
2.2 Personnel qualication
WARNING!
Risk of injury if qualication is insucient!
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 qualications 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-specic
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 pressure switches can result in a risk to persons, the
environment and equipment.
Take sucient precautionary measures.
EN
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7WIKA operating instructions pressure switch, model PSD-3x
2. Safety
2.4 Labelling / safety marks
Product label
EN
Measuring range
P# Product No.
S# Serial No.
If the serial number becomes illegible (e.g. due to mechanical damage or overpainting), traceability will
no longer be possible.
Explanation of symbols
General danger symbol
cULus, Underwriters Laboratories Inc.®
The instrument was inspected in accordance with the applicable US standards and certied
by UL.
Furthermore, instruments bearing this mark comply with the applicable Canadian
standards on safety.
CE, Communauté Européenne
Instruments bearing this mark comply with the relevant European directives.
Analogue signal Switching output 1
Power supply
Switching output 2
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3. Specications
3. Specications
3.1 Measuring ranges
Gauge pressure
bar 0 ... 1
psi 0 ... 15
1)
0 ... 40 0 ... 60 0 ... 100 0 ... 160 0 ... 250 0 ... 400 0 ... 600
1)
0 ... 500 0 ... 1,000 0 ... 1,500 0 ... 2,000 0 ... 3,000 0 ... 5,000 0 ... 8,000
Absolute pressure
0 ... 15
1)
1)
bar 0 ... 1
psi
Vacuum and +/- measuring range
bar -1 ... 0
psi -14.5 ... 0 -14.5 ... 15 -14.5 ... 30 -14.5 ... 50 -14.5 ... 100 -14.5 ... 160 -14.5 ... 200 -14.5 ... 300
The given measuring ranges are also available in kg/cm2 and MPa.
1) Not available for PSD-31.
1)
Overpressure limit
2 times
1.7 times for the relative pressure measuring ranges 160 psi, 1,000 psi and 1,500 psi
3.2 Display
14-segment LED, red, 4-digit, 9 mm character size
Display can be turned electronically through 180°
Update (adjustable): 100, 200, 500, 1,000 ms
1)
0 ... 1.6
0 ... 25
0 ... 1.6
0 ... 25
-1 ... 0.6 1)-1 ... 1.5 -1 ... 3 -1 ... 5 -1 ... 9 -1 ... 15 -1 ... 24
0 ... 2.5 0 ... 4 0 ... 6 0 ... 10 0 ... 16 0 ... 25
1)
1)
1)
1)
0 ... 30
0 ... 2.5 0 ... 4 0 ... 6 0 ... 10 0 ... 16 0 ... 25
0 ... 30
0 ... 50 0 ... 100 0 ... 160 0 ... 200 0 ... 300
1)
0 ... 50 0 ... 100 0 ... 160 0 ... 200 0 ... 300
EN
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9WIKA operating instructions pressure switch, model PSD-3x
3. Specications
3.3 Output signals
Switching output 1 Switching output 2 Analogue signal
PNP - 4 ... 20 mA (3-wire)
EN
PNP - DC 0 ... 10 V (3-wire)
PNP PNP PNP PNP 4 ... 20 mA (3-wire)
PNP PNP DC 0 ... 10 V (3-wire)
Alternatively also available with an NPN instead of a PNP switching output.
With the IO-Link option, switching output 1 is always PNP.
IO-Link, revision 1.1 (option)
IO-Link is optionally available for all output signals.
With the IO-Link option, switching output SP1 is always PNP.
Zero oset adjustment
maximum 3 % of span
Switching thresholds
Switch point 1 and switch point 2 are individually adjustable
Switching functions
Normally open, normally closed, window, hysteresis
Freely adjustable
Switching voltage
Power supply - 1 V
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3. Specications
Switching current
■
without IO-Link: max. 250 mA
■
with IO-Link: SP1 max. 100 mA, SP2 max. 250 mA
Settling time
Analogue signal: 3 ms
Switching output: ≤ 10 ms (20 ms with IO-Link)
Load
Analogue signal 4 ... 20 mA: ≤ 0.5 kΩ
Analogue signal DC 0 ... 10 V: > 10 kΩ
Service life
100 million switching cycles
3.4 Voltage supply
Power supply
DC 15 ... 35 V
Current consumption
Switching outputs with
■
Analogue signal 4 ... 20 mA: 70 mA
■
Analogue signal DC 0 ... 10 V: 45 mA
■
without analogue signal: 45 mA
IO-Link option causes a deviating current consumption
EN
Total current consumption
■
without IO-Link: max. 600 mA including switching current
■
with IO-Link: max. 450 mA including switching current
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11WIKA operating instructions pressure switch, model PSD-3x
3. Specications
3.5 Accuracy data
Accuracy, analogue signal
≤ ±1.0 % of span
EN
Including non-linearity, hysteresis, zero oset and end value deviation (corresponds to measured error
per IEC 61298-2). Calibrated in vertical mounting position with process connection facing downwards.
Non-linearity: ≤ ±0.5 % of span (BFSL, IEC 61298-2)
Long-term drift:≤ ±0.2 % of span (IEC 61298-2)
Accuracy, switching output
Switch point accuracy: ≤ ±1 % of span
Adjustment accuracy: ≤ ±0.5 % of span
Display
≤ ±1.0 % of span ± 1 digit
Temperature error in rated temperature range
■
typical: ≤ ±1.0 % of span
■
maximum: ≤ ±2.5 % of span
Temperature coecients in rated temperature range
Mean TC zero point: ≤ ±0.2 % of span/10 K (typical)
Mean TC span: ≤ ±0.1 % of span/10 K (typical)
3.6 Reference conditions
Temperature: 15 ... 25 °C (59 ... 77 °F)
Atmospheric pressure: 950 ... 1,050 mbar (13.78 ... 15.23 psi)
Humidity: 45 ... 75 % r. h.
Nominal position: Process connection lower mount (LM)
Power supply: DC 24 V
Load: see output signals
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3. Specications
3.7 Operating conditions
Permissible temperature ranges
Medium: -20 ... +85 °C (-4 ... +185 °F)
Ambient: -20 ... +80 °C (-4 ... +176 °F)
Storage: -20 ... +80 °C (-4 ... +176 °F)
Nominal temperature: 0 ... 80 °C (32 ... 176 °F)
Humidity
45 ... 75 % r. h.
Vibration resistance
10 g (IEC 60068-2-6, under resonance)
Shock resistance
50 g (IEC 60068-2-27, mechanical)
Service life, mechanics
100 million load cycles (10 million load cycles for measuring ranges > 600 bar/7,500 psi)
Ingress protection
IP 65 and IP 67
The stated ingress protection (per IEC 60529) only applies when plugged in using mating connectors
that have the appropriate ingress protection.
Mounting position
as required
EN
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13WIKA operating instructions pressure switch, model PSD-3x
3. Specications
3.8 Materials
Wetted parts
Process connection:
EN
Pressure sensor: < 9.8 bar: Stainless steel 316L
Non-wetted parts
Case: Stainless steel 304
Keyboard: TPE-E
Display window: PC
Display head: PC+ABS-Blend
Options for specic media
Medium Option
Oil and grease free Residual hydrocarbon: < 1,000 mg/m
Oxygen, oil and grease free
Stainless steel 316L
≥ 9.8 bar: Stainless steel 13-8 PH
■
Residual hydrocarbon: < 200 mg/m
■
Packaging: Protection cap on the process connection
■
Maximum permissible temperature -20 ... +60 °C (-4 ... +140 °F)
■
Only available for PSD-30
■
Available measuring ranges:
- 0 ... 10 to 0 ... 400 bar gauge
- -1 ... 9 to -1 ... 24 bar
■
Factory supplied without sealing
2
2
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3. Specications
3.9 Process connections
Available connections, model PSD-30
Standard Thread
DIN 3852-E G ¼ A
G ½ A
EN 837 G ¼ B
G ¼ female
G ½ B
ANSI / ASME B1.20.1 ¼ NPT
½ NPT
ISO 7 R ¼
KS PT ¼
- G ¼ female (Ermeto compatible)
Other connections on request.
Available connections, model PSD-31
Standard Thread
- G ½ B with ush diaphragm
EN
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15WIKA operating instructions pressure switch, model PSD-3x
3. Specications
Sealings
Process connection per DIN 3852-E
Standard NBR
EN
Option 1 without
Option 2 FPM/FKM
Process connection per EN 837
Standard without
Option 1 Copper
Option 2 Stainless steel
1) Process connections per EN 837 with female threads do not include any seal.
1)
Process connection G ½ B ush
Standard NBR
Option FPM/FKM
3.10 Electrical connections
Connections
Circular connector M12 x 1 (4-pin)
Circular connector M12 x 1 (5-pin)
1) Only for version with two switching outputs and additional analogue signal
1)
Electrical safety
Short-circuit resistance: S+ / SP1 / SP2 vs. U
Reverse polarity protection: U+ vs. U
-
-
Insulation voltage: DC 500 V
Overvoltage protection: DC 40 V
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3. Specications
3.11 CE conformity
Pressure equipment directive
97/23/EC
EMC directive
2004/108/EC, EN 61326 emission (group 1, class B) and interference immunity (industrial application)
3.12 Manufacturer's declaration
RoHS conformity
2011/65/EU
3.13 Approvals
■
cULus, safety (e.g. electr. safety, overpressure, ...), USA, Canada
■
EAC, import certicate, customs union Russia/Belarus/Kazakhstan
■
CRN, safety (e.g. electr. safety, overpressure, ...), Canada
Approvals and certicates, see website
For special model numbers, e.g. PSD-30000, please note the specications stated on the delivery note.
EN
For further specications see WIKA data sheet PE 81.67 and the order documentation.
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17WIKA operating instructions pressure switch, model PSD-3x
4. Design and function / 5. Transport, packaging and storage
4. Design and function
4.1 Description
By means of a sensor element and by supplying power, the prevailing pressure is converted into a
EN
switching signal or an amplied standardised electrical signal via the deformation of a diaphragm. This
electrical signal varies in proportion to the pressure and can be evaluated accordingly.
PSD-30: Process connection with internal diaphragm (standard version).
PSD-31: Process connection with ush diaphragm for highly viscous or crystallising media that may clog
the bore of the process connection.
4.2 Scope of delivery
Cross-check the scope of delivery with the delivery note.
For ush design (model PSD-31) with pre-mounted sealings and protection cap.
5. Transport, packaging and storage
For the protection of the diaphragm, the ush design (model PSD-31) is delivered with a
special protection cap.
■
In order to avoid damage at the diaphragm and/or the process connection thread,
remove the protection cap by hand only just before installation.
■
Keep the protection cap for subsequent storage or transport.
■
Fit the protection cap before dismounting and transporting the instrument.
5.1 Transport
Check the instrument for any damage that may have been caused by transport. With ush design
(model PSD-31), additionally check the diaphragm for any optical damage.
Obvious damage must be reported immediately.
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5. Transport, packaging and storage / 6. Commissioning, ...
5.2 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).
5.3 Storage
Permissible conditions at the place of storage:
■
Storage temperature: -20 ... +80 °C
■
Humidity: 45 ... 75 % relative humidity (no condensation)
In order to protect the diaphragm, mount the protection cap before storing the instrument.
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..
6. Commissioning, operation
CAUTION!
Only use the pressure switch if it is in perfect condition with respect to safety.
Check the following points before commissioning:
■
Check the diaphragm for any visible damage, since this is a safety-relevant component.
■
Leaking uid is indicative of damage.
EN
Required tool: SW 27 open-ended spanner, screwdriver
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19WIKA operating instructions pressure switch, model PSD-3x
6. Commissioning, operation
6.1 Making the mechanical connection
■
With ush process connections (model PSD-31), remove the protection
cap not until shortly before mounting. During installation, ensure that the
EN
diaphragm is not damaged.
■
The sealing faces at the instrument always have to be clean.
■
Only ever screw in, or unscrew, the instrument via the spanner ats.
Never use the case as a working surface.
■
The correct torque depends on the dimensions of the pressure connec-
tion and the gasket used (form/material).
■
When screwing in, do not cross the threads.
■
For information on tapped holes and welding sockets, see Technical
Information IN 00.14 at www.wika.de.
Seal
Parallel threads Tapered threads
per EN 837
per DIN 3852-E NPT, R and PT
Correct sealing of the process connections with parallel threads at the sealing face must be made
using suitable at gaskets, sealing rings or WIKA prole sealings.
The sealing of tapered threads (e.g. NPT threads) is made by providing the thread with additional
sealing material such as, for example, PTFE tape (EN 837-2).
For further information on seals see WIKA data sheet AC 09.08 or under www.wika.com.
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6. Commissioning, operation
6.2 Making the electrical connection
■
The instrument must be earthed via the process connection!
■
The power supply for the pressure switch must be made via an energy-limited electrical circuit in
accordance with section 9.3 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 pressure switch be used at this altitude.
■
For cable outlets, make sure that no moisture enters at the cable end.
Connection diagrams
Circular connector M12 x 1; 4-pin
Circular connector M12 x 1; 5-pin
EN
Assignment
+
U- S
U
1 3 2 4 2
+
SP1 / C SP2
Assignment
+
U- S
U
1 3 5 4 2
+
SP1 / C SP2
Zero point adjustment
Check the indicated zero point on the display during commissioning.
Should an oset be displayed as a result of installation, this can be reset in programming mode with the
0SET parameter
■
Carry out zero point adjustment for relative and vacuum pressure measuring ranges in a
depressurised state.
■
Carry out zero point adjustment of absolute pressure ranges from 0 bar absolute
(vacuum). Since appropriate references are required for this, we recommend that this is
only carried out by the manufacturer.
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21WIKA operating instructions pressure switch, model PSD-3x
6. Commissioning, operation
6.3 Operating modes
System start
■
EN
Display is fully activated for 2 sec.
■
When the pressure switch is powered up within the range of the hysteresis, the output switch is set to
"not active" by default.
Display mode
Normal operation, display pressure value
Programming mode
Setting the parameters
6.4 Keys and functions
The pressure switch has two operating modes, the display mode and the programming mode. The
selected operating mode determines the respective function of the key.
Jumping into the programming mode
Keep the "MENU" key pressed for approx. 5 seconds. If the password is set to ≠
0000, a password will be requested. If authentication is successful, then it enters
the programming mode, otherwise it reverts to display mode.
Returning to the display mode
Simultaneous pressing of both keys.
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6. Commissioning, operation
Status switching output 2 (optional)
Status switching output 1
Display mode
▶ Short press
Display of the unit
▶ Long press
Display of the set parameters see chapter
6.4 "Parameters"
Programming mode
▶ Short press
Menu up
Parameter value up (step-wise)
▶ Long press
Menu up
Parameter value up (fast)
4-digit LED display
■
Display pressure value
■
Display menu item
■
Display parameter
Display mode
▶ Short press
Display of the unit
▶ Long press
Jumping into the programming mode
Programming mode
▶ Short press
Menu down
Parameter value down (step-wise)
▶ Long press
Menu down
Parameter value down (fast)
Display mode
▶ Short press
Display of the unit
Programming mode
▶ Short press
Select menu item
Conrmation of the input
EN
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23WIKA operating instructions pressure switch, model PSD-3x
6. Commissioning, operation
6.5 Parameters
Parameter Description
SP1/SP2 Hysteresis function: Switch point switching output (1 or 2)
EN
FH1/FH2 Window function: Window high switching output (1 or 2)
RP1/RP2 Hysteresis function: Reset point switching output (1 or 2)
FL1/FL2 Window function: Window low switch output (1 or 2)
EF Extended programming functions
RES Return the set parameter to the factory settings
DS1/DS2
DR1/DR2
OU1 Switching function switching output (1 or 2)
OU2 HNO = hysteresis function, normally open
UNIT Unit switching
0SET Oset adjustment (3 % of span)
DISM Display value in display mode
DISU Display update 1, 2, 5, 10 updates/second
DISR Rotate display indicator by 180°
RHL Clear the Min- and Max-value memories
PAS Password input, 0000 = no password
TAG Input of a 16-gure alphanumeric measuring point number
Switch delay time, which must occur without interruption before any electrical signal change occurs (SP1 or SP2)
Switch delay time, which must occur without interruption before any electrical signal change occurs (RP1 or RP2)
HNC = hysteresis function, normally closed
FNO = window function, normally open
FNC = window function, normally closed
ACT = actual pressure value; LOW, HIGH = minimum, maximum pressure value OFF = display o;
SP1/FH1 = function switch point 1, RP1/FL1 = function reset point 1,
SP2/FH2 = function switch point 2, RP2/FL2 = function reset point 2
Password input digit by digit
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6. Commissioning, operation
Menu (programming and factory setting)
Display mode
Long press on menu key
Programming mode
SP1 / FH1 Value (Min: MBA +0.5 % Max: MBE) Instrument nominal pressure
RP1 / FL1 Value (Min: MBA Max: SP1 -0.5 %) Instrument nominal pressure -10 %
SP2 / FH2 Value (Min: MBA +0.5 % Max: MBE) Instrument nominal pressure
RP2 / FL2 Value (Min: MBA Max: SP2 -0.5 %) Instrument nominal pressure -10 %
EF RES Yes / No Reset to factory setting
END END
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Display mode
DS1 Value 0 ... 50 s 0 s
DR1 Value 0 ... 50 s 0 s
DS2 Value 0 ... 50 s 0 s
DR2 Value 0 ... 50 s 0 s
OU1 PARA HNO, HNC, FNO, FNC HNO
OU2 PARA HNO, HNC, FNO, FNC HNO
UNIT Unit BAR, MPA, KPA, PSI, KG/cm
0SET Yes / No
DISU Value 1/2/5/10 update/second 5
DISR Yes / No Rotate display by 180°
RHL Yes / No Reset HIGH, LOW
PAS Value Password without
TAG Value Measuring point number without
Legend:
MBA = Start of measuring range
MBE = End of measuring range
Zero point adjustment 3% of span
ACT, HIGH, LOW, OFF, SP1/FH1, RP1/
PARA
FL1, SP2/FH2, RP2/FL2
2
Factory setting:
Order-related
ACTDISM
EN
25WIKA operating instructions pressure switch, model PSD-3x
6. Commissioning, operation
6.6 Switching functions
Hysteresis function
If the system pressure uctuates around the set point, the hysteresis
EN
keeps the switching status of the outputs stable. With increasing system
pressure, the output switches when reaching the switch point (SP).
■
Contact normally open (HNO): active
■
Contact normally closed (HNC): inactive
With system pressure falling again, the output will not switch back
before the reset point (RP) is reached.
■
Contact normally open (HNO): inactive
■
Contact normally closed (HNC): active
Window function
The window function allows for the control of a dened range.
When the system pressure is between window High (FH) and window
Low (FL), the output switches on.
■
Contact normally open (FNO): active
■
Contact normally closed (FNC): inactive
When the system pressure is outside window High (FH) and window
Low (FL), the output does not switch on.
Fig.: Hysteresis function
■
Contact normally open (FNO): inactive
■
Contact normally closed (FNC): active
Fig.: Window function
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6. Commissioning, operation
Delay times (0 ... 50 s)
This makes it possible to lter out unwanted pressure peaks of a short
duration or a high frequency (damping).
The pressure must be present for at least a certain pre-set time for the
output to switch on. The output does not immediately change its status
when it reaches the switching event (SP), but rather only after the
pre-set delay time (DS).
If the switching event is no longer present after the delay time, the
switch output does not change.
The output only switches back when the system pressure has fallen
down to the reset point (PR) and stays at or below the reset point (RP)
for at least the pre-set delay time (DR).
If the switching event is no longer present after the delay time, the
switch output does not change.
6.7 Description of the IO-Link functionality (optional)
IO-Link is a point-to-point connection for the communication of the PSD-3x with an IO-Link master.
IO-Link specication: Version 1.1
A detailed description of the IO-Link functionality and the device description le (IODD) can be found
online on the product details page of the pressure switch at www.wika.com.
Fig.: Delay times
EN
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27WIKA operating instructions pressure switch, model PSD-3x
7. Maintenance and cleaning
7. Maintenance and cleaning
7.1 Maintenance
This instrument is maitenance-free.
EN
Repairs must only be carried out by the manufacturer.
7.2 Cleaning
CAUTION!
■
Before cleaning, correctly disconnect the instrument from the pressure supply, switch it
o and disconnect it from the mains.
■
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 personnel
and the environment from exposure to residual media.
■
Residual media in dismounted instruments can result in a risk to persons, the
environment and equipment.
■
Take sucient precautionary measures.
■
Do not use any pointed or hard objects for cleaning, as they may damage the diaphragm
of the process connection.
For information on returning the instrument see chapter 9.2 "Return".
28 WIKA operating instructions pressure switch, model PSD-3x
11430486.07 04/2015 EN/DE/FR/ES
8. Faults
8. Faults
In the event of any faults, rst check whether the pressure switch is mounted correctly,
mechanically and electrically.
Error display
Via the instrument's display internal errors of the instrument are output.
The following table shows the error codes and their meaning.
Error Description
ATT1 On changing the switch point, the system automatically reduces the reset point.
ATT2 Zero-point adjustment error, current pressure is outside the limits
ATT3 Password entered for menu access is incorrect
ATT4 TAG cannot be shown in the display (e.g. special characters)
ERR Internal error
OL Overpressure, measuring range exceeded > approx. 5% (display blinks)
UL Underpressure, below measuring range < approx. 5 % (display blinks)
Acknowledgement of an error display by pressing the „Enter“ key.
EN
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29WIKA operating instructions pressure switch, model PSD-3x
8. Faults
Problem Possible cause Measure
No output signal Cable break Check the continuity
No output signal No/wrong power supply Rectify the power supply
EN
No/wrong output signal Wiring error Observe the pin assignment
Constant output signal upon change
in pressure
Deviating zero point signal Overpressure limit exceeded Observe the permissible overpressure limit
Signal span too small Mechanical overload caused by over-
Signal span too small Power supply too high/low Rectify the power supply
Signal span drops Humidity has entered Assemble the cable correctly
Signal span drops/too small Diaphragm damaged, e.g. due to
If complaint is unjustied, we will charge you the complaint processing fees.
CAUTION!
If deciencies cannot be eliminated by means of the measures listed above, shut down the
instrument immediately, and ensure that pressure and/or signal are no longer present, and
secure the instrument from being put back into operation inadvertently. In this case, contact
the manufacturer. If a return is needed, follow the instructions given in chapter 9.2 "Return".
Mechanical overload caused by overpressure
pressure
impacts, abrasive/aggressive medium;
corrosion at diaphragm/process
connection
Replace instrument; if it fails repeatedly,
contact the manufacturer
Replace instrument; if it fails repeatedly,
contact the manufacturer
Contact manufacturer and replace
instrument
30 WIKA operating instructions pressure switch, model PSD-3x
11430486.07 04/2015 EN/DE/FR/ES
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