pressure switch

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Differential Pressure Switch DPI

Types available

Type code Type Description

Product overviewElectronic differential pressure switch for monitoring the differential pressure of air and other non-flammable and non-aggressive gases.Monitoring of air filters, fans, industrial cooling air cycles as well as over heating protection, control of air and fire dampers, anti-freeze with heat exchangers.

Technical data

EXT-TN-1071658 DPI2500 0...10V and relay, pressure range 0...2500Pa

EXT-TN-1072426 MKS100 Metal duct connector, L=100mm (2 pieces necessary per device)

Security advice !

Electrical connection

Standards CE conformity

Power supplyCurrent consumptionOutputMaterialTubingPressure connectionElectrical connectionCable entryDimensions LxWxHBursting pressureAccuracy % full scaleLong term stabilityMediaAmbient temperatureStorage temperatureProtectionWeightRelay output

DC 24V / AC 24V ±10%Max. 80mA@DC 24V0...10V, load min. 1kΩHousing and cover : ABS / PCPVC, softMale, D=5mm / 6.3mmScrewing terminals, max. 1.5mm²M16 and M2089 x 86.5 x 37.1mm30kPa±1.5% Typical <= ±1Pa / yearAir and non-aggressive gases-5...+50°C, max. 95% RH, non-condensing-20...70°CIP54 according to EN60529150g1x relay output (max. DC 30V / AC 250V / 6A )

General Data

- 89/336/EEC EMC directive- 2002/95/EEC RoHS directive

The installation and assembly of electrical equipment may only be performed by a skilled electrician.The modules must not be used with equipment that supports, directly or indirectly, human health or life or with applications that can result in danger for people or animals.

The devices are constructed for the operation of protective low voltage (SELV). For the electrical connection, the technical data of the corresponding device is valid.Sensing devices with transducer should in principle be operated in the middle of the measuring range to avoid deviations at the measuring end points. The ambient temperature of the transducer electronics should be kept constant.When switching the supply voltage on/off, power surges must be avoided on site.

- For connecting the device, the process lines must be unpressurised.- Note the suitability of the device for the medium to be measured.- Note the maximum pressure.

Mounting advice

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Installation

A pre-requisite for the operation is a proper installation of all electrical supply, control and sensing leads as well as the pressurised connec-tion line. Before installing the device, the leak tightness of the pressurised connection lines must be inspected.

MENU

BACK

OK

Settings

By pressing the button for 3 seconds, you can enter theselected menu.

By pressing the button you can return without makingchanges.

By pressing the button you can open new options or confirmchanges and return to previous display.

By pressing the buttons you can scroll the menus.

Pa, kPa, mmH2O, inchWC, mmbar

See types available

0,5...10s

Zero point calibration

High point adjustment

Reset span adjustment

Setpoint (between min...max pressure)

0...5% of the range

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Span adjustment

Terminal connection plan

Dimensions (mm)

Note! Supply voltage must be connected one hour before the zero point calibration is carried out.1) Disconnect both tubes from the pressure inlets + and –.2) Push both arrow buttons or select “Zero” from the menu. Green LED turns off and “Zero” text followed by a counter from 3 to 0 seconds is displayed.3) Wait until the green LED turns on again and then connect the tubes back to the pressure inlets.It is recommended to adjust the zero point every 12 months during normal operation.

Note! Supply voltage should be connected one hour before the span point adjustment is carried out.Span point must not be adjusted without input pressure.If the span point is adjusted with 0Pa or close to 0Pa input pressure the device may lose its accuracy and will not give out correct readings. In this case go to menu and select “Span” and then “Reset”. This resets the span adjustment.

To adjust the span you need an accurate reference meter. Follow these steps to correctly adjust the span:1) Set the zero point.2) Connect the input pressure.3) From the menu select “Span”, and then “Adjust”.4) Adjust the display or 0...10V value to match the reference meter’s value using the arrow buttons and confirm by pressing OK.

V

Vout10V

How span adjustment affects the measurement

NC

COM

NO

Relay 1

24V AC/DCPower supply

Output 0...10V

24V

GND

Pout

V+

+-

The supply cable and control cable for relay must be separate, if non SELV voltage is used in relay contacts. Both of the cables have their own cable entry.

86,5

37,1

64,5

74,5

52,589

Copyright HK Instruments Installation Version 1.0 2012

SCHEMATICS

MOUNTING THE DEVICE

INSTALLATION

STEP 1

1) Select mounting location (duct, wall, panel)2) Use the device as a template and mark the screw holes3) Mount with appropriate screws (not included)

YES NO NO

Figure 1b - Mounting Orientation

1) Mount the device in desired location (see step 1)2) Open the lid and route cable(s) through strain relief(s) and connect the wires to terminal block(s) (see step 2)3) The device is now ready for con�guration

WARNING! Apply power after the device is properly wired.

Figure 1a - Surface Mounting

DIMENSIONAL DRAWINGS

Figure 1c - Application Connections

Static Pressure Filter/DamperMonitoring

Fan/BlowerMonitoring

NotConnected

24V GND 0-10V

Terminal Block Terminal Block for relays

NC COM NO NC COM NO

?

(86.5)

?

(74.5)

?

(64.

5)

?

(52.

5)

?

(37.1)

?

(89.

0)


CONFIGURATION

1) Select the desired measurement unit2) Select the desired measurement range 3) Select the desired response time 4) Con�gure the relay(s)5) Zero the device6) Calibrate the span point7) Connect pressure tubes. Connect positive pressure to port labeled "+" and negative pressure to port "-". The device is now ready to use.

STEP 3

CONFIGURATIONFIGURE 3

For CE compliance, a properly grounded shielding cable is required

1) Unscrew strain relief and route cable(s). Use separate strain relief for 0-10V output cable and relay cable(s).2) Connect the wires as shown in �gure 2a and 2b.3) Tighten the strain relief.

WIRING DIAGRAMS STEP 2 CONTINUED

24V

GND

Pout

Power Supply24VDC / 24VAC

Figure 2a - Wiring Diagram 0-10V Output

+

Outout 0...10V

V

+

Figure 2b - Wiring Diagram Relay(s)

NC

COM

NO

Relay 1

NC

COM

NO

Relay 2

with the MENU button you can enter the menu by pressing the button for 3 seconds,when in menu you can exit anywhere without making changes

with the BACK button you can return without making changes

with the OK button you can open new options or con�rm changes and return to previous display

with the button you can scroll the menus

SPAn

ZEro

rEL 1/2

rESP

PSEL

Unit Pa, kPa, mmH2O, inchWC, mbar

Pressure range selection

Response time

Relay menu(s)


Response time

High point calibration menu

rES

Adu High point calibration

Reset high point calibration

HYS

SP

dir Relay activation menu

Relay setpoint

Relay hysteresis 0-5% of range

FALL

rISE Relay activation on increasing pressure

Relay activation on decreasing pressure


ZERO THE DEVICE STEP 6

To zero the device two options are available:1) Manual Pushbutton Auto Zero2) function

Does my transducer have an function? See the product label. If it shows –AZ in the model number, then you have the function.

1) Manual Pushbutton Auto ZeroNOTE: Supply voltage must be connected at least one hour prior to zero point adjustment. a) Disconnect both pressure tubes from the pressure ports labeled + and –. b) Push both arrow buttons on top of the lid or go to con�guration menu and select “Zero”. c) The zeroing of the device will proceed automatically when the green led on top of the lid turns off and “Zero” text followed by a counter from 3 to 0 seconds appears on the display. Zeroing is complete when the green led turns on again. d) Reinstall the pressure tubes, ensuring the High pressure tube is connected to the port labeled +, and the Low pressure tube is connected to the port labeled −.

NOTE: The zero point should be calibrated via manual auto zero, one hour after installation and at least every 12 months during normal operations.

2) functionIf the device includes the optional e-zero circuit, no action is required.

(-AZ) is a True Auto Zero function in the form of an automatic zeroing circuit built into the PCB board. The function electronically adjusts the transducer zero at predetermined time intervals (every 10 minutes). The function eliminates all output signal drift due to thermal, electronic or mechanical effects, as well as the need for technicians to remove high and low pressure tubes when performing initial or periodic transducer zero point calibration. The adjustment takes 4 seconds after which the device returns to its normal measuring mode. During the 4 second adjust-ment period, the output and display values will freeze to the latest measured value.

Transducers equiped with the function are virtually mainte-nance free.

FIGURE 3WARRANTY POLICY

(a) WARRANTY COVERAGE: HK warrants to the original end user of the Products that the Products will, at the date of initial purchase, meet the applicable speci�cation for such Products (as described by HK in its product literature) and, under normal use and service, will be free from any defects in materials or manufac-ture for (a) one (1) year from date of sale to end user for electrome-chanical Products and (b) �ve (5) years from date of manufacture for electronic Products.

(b) NO WARRANTY OF PRODUCT SUITABILITY: Neither HK nor the manufacturer of the Products to be sold hereunder (“Manufacturer”) makes any warranty that Products are suitable for a particular purpose, application or design. Many states and localities have differing codes or regulations governing the installa-tion and/or use of HK products. HK does not guarantee compli-ance with such codes or regulations; the end user is solely responsible for safe and correct installation and use of the Prod-ucts and for compliance with such codes and regulations.

(c) EXCLUSION OF IMPLIED WARRANTIES: THE WARRANTY HEREIN IS THE ONLY WARRANTY APPLICABLE TO THE PROD-UCTS AND EXCLUDES ALL OTHER WARRANTIES, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND ANY IMPLIED WARRANTY ARIS-ING FROM COURSE OF DEALING OR USAGE OF TRADE.

(d) REMEDIES FOR NON-CONFORMITY OR BREACH OF WAR-RANTY: If the Product purchased does not conform to the appli-cable warranty, HK will provide, at its option, one of the following remedies: (1) repair of the non-conforming Product, (2) replace-ment with a conforming Product, or (3) refund of the original purchase price. THESE REMEDIES SHALL BE THE EXCLUSIVE AND SOLE REMEDY for any breach of warranty. HK and Manufac-turer have no other responsibility or liability for breach of warranty or otherwise.

(e) LIMITATION OF LIABILITY: NEITHER HK NOR MANUFAC-TURER WILL BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES UNDER ANY CIRCUMSTANCE, INCLUDING WITHOUT LIMITATION ANY DEFECT IN THE PRODUCT PURCHASED.

(f) FURTHER LIMITATIONS: The warranty herein does not cover damage caused by lightning, �ood or other natural phenomenon; normal wear and tear; accident, improper or careless handling, abnormal use, overloading, improper storage or abuse; incorrect installation, care or reconstruction; or alteration, calibration, recon�guration, maintenance or installation work done by unquali-�ed personnel. Should Manufacturer alter the structure of any Product in the future, HK and Manufacturer shall not be obligated to make comparable changes to Products already purchased. HK will give a new warranty for Products being replaced or repaired within the warranty period, however only to the expiration of the original Product’s warranty period. The warranty includes the repair of a defective part or device, or if needed, a new part or device, but no other costs except as otherwise stated in the HK Distributor Terms and Conditions.

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Differential Pressure Switch PS

Types available

Type code Type Description

Standards CE conformity

Product overviewDifferential pressure switch for monitoring the differential pressure of air and other non-flammable and non-aggressive gases.Possible applications: monitoring of air filters, fans, industrial cooling air cycles as well as overheating protection, control of air and fire dampers, anti-freeze with heat exchangers.

Technical Data

HousingHousing coverMembraneDuct connectorsTubingProtectionDimensions (LxWxH)Maximum pressureMediaOperation temperatureStorage temperatureSub miniature switches

Service lifeConnectionsCable entryWeight

ABSPCSiliconeABSPVC, softIP54105 x 73 x 63mm50kPaAir and non-aggressive gases20...60°C40...85°CGold contacts : PS200Silver contacts : PS300 / PS500 / PS1500 / PS4500>1,000,000 switching operationsScrew terminalsM16150g (without accessories)

Measuring rangeSwitching differenceSwitching load

30...300Pa20Pa3A resistive / 2A inductive load (max. AC 250V)

General data

PS300



PS500



PS1500



PS4500

- 2006/95/EC Low voltage- 2004/108/EC EMC

EXT-TN-1500288 PS200 Measuring range 20...200Pa





EXT-TN-1072426 MKS100 Metal duct connector, L=100mm (2 pieces necessary per device)

Security advice !

The installation and assembly of electrical equipment may only be performed by a skilled person.The modules must not be used with equipment that supports, directly or indirectly, human health or life or with applications that can result in danger for people or animals.


20...200Pa10Pa0.1A resistive load (max. AC 250V)

PS200

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Differential Pressure Switch PS

Mounting advice

Installation

Terminal connection plan

Dimensions (mm)

The pressure switch is factory calibrated in the vertical position. If installed horizontally, this will affect the switching point as follows:- with cover facing upwards, +15Pa- with cover facing downwards, -15Pa

A prerequisite for the operation is a proper installation of all electrical supply, control and sensing leads as well as the pressurised connection line. Before installing the device, the leak tightness of the pressurised connection lines must be inspected.

When differential pressure increases:- 1-3 open- 1-2 close

2 3 1NO NC COM

P

pressure switch

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