Omega Speaker Systems Pressure Washer PSW32 User Manual

User’s Guide

www.omega.com

e-mail: info@omega.com

PSW 3 2 SERIES

ELECTRONIC PRESSURE SWITCH FOR HYDRAULIC APPLICATIONS

PSW32 Series

APPLICATION

IIdeal for Control of Air, Water, Gases,

Neutral Mineral Oils and Various Heating Oils

FEATURES

Real-time LED Status Display of Pressure

Adjustable Hysteresis

Off-line Calibration

Fast, Accurate Response

Extensive Service Life

Analog Output (Optional)

SPECIFICATIONS

Ports

1/ 4" NPT

Connector to DIN 43651 (7 Pin)

(for versions with analog output)

2.44 (62)

Adjustment Range

Proof/ Burst Pressure

Temperature Rating

Ambient

0 to 2320 PSI (0 to 160 bar)

See Part Number Identification Table

1.18 (30)

14° to 140° F (-10° to 60° C)

14° to 175° F (-10° to 80° C)

Media

Temperature Sensitivity

@ Zero Point

Set Point Shifts 0.4% FS/ 10°C

@ Set Point Pressure Set Point Shifts 0.3% FS/ 10°C

Electronics

Pressure Sensor, Microprocessor

Evaluation Circuitry and Solid-state

Output Driver

1.97 (50)

Switching/ Reset Point Adjustable between 0 – 100% of

FS Value

Linearity

< 0.5% of FS ± 1 digit

Electrical Connector

Without Analog Output: DIN 43650

Table A with Removable Cable

Plug Adapter

1.18 (30)

Connector to DIN 43650

With Analog Output: DIN 43651,

7 Pin Circular Connector

(3) Mounting Screws

M5x45

MATERIALS OF CONSTRUCTION

Housing

Sensor

O-Ring

Die-Cast Zinc

304 Stainless Steel

Viton

1.22 (31)

1.57 (40)

O-Ring

All dimensions in inches (mm)

ELECTRONIC PRESSURE SWITCH FOR HYDRAULIC APPLICATIONS

ELECTRICAL PARAMETERS

Electrical connection

DIN 43650 Table A without analog output

DIN 43651 (7 pin), with analog output

18 to 32V DC

10% (within 18 to 32V)

<50 mA (plus load current)

Power supply (polarity safe)

Permissible residual ripple

Current consumption

DIN 43650 without analog output

DIN 43651 with analog output

+24V

Uout Imax = 1A

Load

Uout Imax = 1A

Micro-

Controller

Micro-

Controller

E²PROM

(SP,RP)

Load

SP RP

E²PROM

(SP,RP)

4 – 20mA

0 – 10V

SP RP

Ø.12 (3)

SWITCHING OUTPUT

Switching mode Open collector PNP switched to supply

(suited for inductive load)

Output voltage

Analog output

Contact rating

Supply voltage minus 1.5V (approx)

O to l0V and 4 to 20mA

.94

(24)

View on 'A'

¹/4 – 18 NPT

= 1A (short-circuit proof)

max

Mounting Plates (Included)

1/ 4" NPT Pressure Port

304 Stainless Steel

Switching time < 5ms

Service life 100 million switching cycles

Switching logic Signal “on” with rising pressure, if SP* > RP**

1.73 (44)

1.57 (40)

Signal “on” with falling pressure, if SP < RP

All dimensions in inches (mm)

* SP = Switching point **RP = Reset point

PART NUMBER IDENTIFICATION

PART NUMBER PRESSURE RANGE ELECTRICAL

PROOF/ BURST

PRESSURE – PSI

ANALOG OUTPUT

0-10 VOLT AND 4-20mA

PSI

CONNECTION

PSW32B

0 – 580 (0 – 40)

0 – 1450 (0 – 100)

0 – 2320 (0 – 160)

DIN 43650

DIN 43651

DIN 43650

DIN 43651

DIN 43650

DIN 43651

1450/ 2175 (100/ 150)

2900/ 4350 (200/ 300)

4350/ 5800 (300/ 400)

Yes

PSW32B-A

PSW32C

PSW32C-A

PSW32D

Yes

PSW32D-A

Yes

Numbers in parentheses indicate measurement in bar.

Notes: Mounting plates included.

For hydraulic applications with pressure spikes or surges install a pressure snubber.

All pressure switches are shipped with mounting screws, o-ring and mating electrical connector.

I N S T R U C T I O N

M A N U A L

supply is switched on. Release this button

Case 2

ADJUSTING THE SWITCHING POINTS (SP)

again after the power supply has been

switched on. The display will then show the

buffering time in milliseconds (e.g. 03) or

seconds. The cursor buttons M, M can be

used to set the buffering time to 03, 06,

12, 24 or 50 ms or 0.1, 0.2 or 0.4

seconds. When this has been done, press

SP to store the setting.

Positive hysteresis

AND RESET POINTS (RP)

Switching point

a) Adjusting the switching point.

Case 1

or Case 2

f) Window mode

If it is desired to monitor whether the pressure

lies within a certain range, a switching window

can be created for this purpose. The pressure

switch will then indicate cases in which the

actual pressure lies above or below this area.

In order to set a switching window, the two

buttons SP and M must be pressed

simultaneously before the power supply is

switched on.

d) Setting the pressure switch to ambient

pressure = 0.

Since ambient pressure varies according to

altitude, the user may re-calibrate the zero

point to match local conditions.

Press and hold the SP button. The display

will show the previous switching pressure

setting, and the dotted bar will flash while

the button is pressed down (case 1).

Press the button RP before the power

supply is switched on. Release this button

again after the power supply has been

switched on and the display test has run.

The display will then show "OFS". The

cursor buttons M, M can be used to set the

pressure display to 0. When this has been

done, press SP to store the setting.

Release these buttons again after the power

supply has been switched on and the display

test has run. The display will then show the

operating mode.

You can now use the cursor keys to adjust

the switching point upwards or downwards.

If a cursor key is held down, the values will

change faster. When the cursor key is

released again, the switch-on pressure

setting will cease to change. This setting is

stored and activated when the SP button is

released, after which the display will show

the current pressure value and the bar will

quit flashing.

The cursor buttons M,M can now be used to

change the operating mode until "FEn"

e) Hysteresis mode

(standing for "Window") in the display. When

this has been done, press SP to store the

setting. The button SP can be used to display

the switching-point setting, which can be

modified by means of the cursor buttons M, M.

If it is desired to operate with a fixed

hysteresis value instead of the reset point,

this value can be selected as desired.

In order to set a hysteresis value, the two

buttons SP and M must be pressed

simultaneously before the power supply

is switched on.

b) Adjusting the reset point.

The distance between the switching point and

reset point is the switching window. If the

switching point is lower than the reset point, a

signal will be output as long as the pressure

lies within the preset window (case 1, rising

pressure). If the switching point is higher than

the reset point, a signal will be output as long

as the pressure lies outside the preset window

(case 2, rising pressure). In the case of falling

pressure, the signal is inverted.

Case 3

or Case 4

Release these buttons again after the

power supply has been switched on and the

display test has run. The display will then

show the operating mode. The cursor

buttons M,M can now be used to change

the operating mode until "HYS" appears in

the display. When this has been done,

press SP to store the setting.

Press and hold the RP button. The display

will show the previous reset pressure

setting, and the dotted bar will flash while

the button is pressed down.

Case 1

The SP button can be used to display the

switching-point setting, which can be

modified by means of the cursor buttons

M,M.

On = Pressure within window

You can now use the cursor keys to adjust

the reset point in the same manner as

described above.

The button RP can be used to display the

hysteresis setting, which can also be

modified by means of the cursor buttons

M,M.

During both adjustment operations, it may

occur that the hysteresis graph changes

from one state to another at the time a

transition is made through the point

"Switching pressure = Reset pressure".

When both points are correctly set, the

hysteresis graph will also be correct. You

can change between SP and RP as often as

you wish until the settings are correct.

Case 2

Negative hysteresis means: Signal “on”

with rising pressure (case 1).

Off = Pressure within window

Positive hysteresis means: Signal “on” with

falling pressure (case 2).

If the switching point is modified, this will

automatically also result in a change in the

reset point by a value equal to the

hysteresis setting.

c) Setting a buffering time.

In order to prevent brief pressure “spikes”

or “surges” from causing undesired

Case 1

switching, a buffering time can be entered.

The effect of this is that pressure changes

are evaluated only if the pressure signal in

question is present for longer than the

buffering time. In order to set a buffering

time, press the button SP before the power

Std

Standard mode, switching and reset

points adjustable

Negative hysteresis

HYS = Hysteresis mode, switching point and

hysteresis adjustable

FEn

Window mode, switching window

adjustable

Switching point

Switching Characteristic Graphs

Signal “off” with falling pressure

Signal “off” with rising pressure

Signal “on” with rising pressure

Signal “on” with falling pressure

Setting RP < SP

Setting RP > SP

Setting SP* > RP**

Setting SP < RP

* SP = Switching point

**RP = Reset point

Explanation:

When the switching point (SP) is adjusted HIGHER than the reset point (RP), then the switching output will be “normally off”.

When the switching point (SP) is adjusted LOWER than the reset point (RP), then the switching output will be “normally on”.

Position of operating elements

E R R O R M E S

Display of hardware errors or malfunctions

Display Meaning Cause / Remedy

A G E S

O.Er

Output error

Error at switching output: Circuit-breaker defective, feedback loop

to processor open circuit. Repair necessary.

Pressure display

E.Er

I.Er

E PROM error

E PROM module defective or connection to processor faulty.

Repair necessary.

Switching

function graph

Initialization error Checksum of initialization data incorrect. Remedy: Call up any

SETUP function and acknowledge the setting with SP.

Switching output LED

This error message is caused by a data error. All setup values

should therefore be checked and corrected if necessary.

Switching point button

Reset point button

Raise switching

or reset point button

C.Er

Calibration error

Short-circuit low

Checksum of calibration data incorrect. Recalibration necessary.

SC.L

Short-circuit between output and ground. Check wiring:

Power supply may be too weak for connected load (leading

to collapse of voltage, particularly with loads with a high switch-on

current such as incandescent lamps or capacitances).

Lower switching

or reset point button

UFL

OFL

Underflow

Overflow

The applied pressure is below the measuring range:

Increase pressure until it is within the measuring range.

The applied pressure is above the measuring range:

Decrease pressure until it is within the measuring range.

Display of hardware errors or malfunctions (can be switched off)

Display Meaning Cause / Remedy

SC.H

Short-circuit high Short-circuit between output and power supply. Check wiring.

If the switching line from the load (e.g. electrical control

device, PLC or similar) is being held at an open-circuit

potential of > 3V, or if several pressure switches are being

operated in parallel, this function should be switched off.

Disconnection: M during display test, then adjust with M or M.

U.Lo

Voltage low

Power supply voltage too low (<17V).

Check power supply: Load may be too large.

Disconnection: M during display test, then adjust with M or M.

Messages generated by calling SETUP functions

Cod

CLC

txx

Meaning

Requested code or code programming

Deletion of current code

Clear code

Delay time

(Buffering time)

Setting of filter time constant

xx = Switching output delay

xx {03, 06, 12, 24, 50} in ms and

xx {O.1, 0.2, O.4} in s.

OFS

Offset

Request for offset adjustment using M and M buttons

Short-circuit monitoring activated

Voltage monitoring activated

SC.H

U. LO

OFF

Short-circuit high

Voltage low

Off

Short-circuit or voltage monitoring deactivated

Std

HYS

FEn

Standard mode

Hysteresis mode

Window mode

Standard mode activated

Hysteresis mode activated

Window mode activated

U-C

I-C

Voltage calibration

Current calibration

Voltage output selected

Current output selected

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period

of 13 months from date of purchase. OMEGA’s Warranty adds an additional one (1) month grace period to the

normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers

receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department

will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by

OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY

does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling,

improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WAR-

RANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been dam-

aged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misappli-

cation; misuse or other operating conditions outside of OMEGA’s control. Components, which wear, are not war-

ranted, including but not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. How ever, OMEGA neither

assum es responsibility for any om issions or errors nor assum es liability for any dam ages that result

from the use of its products in accordance w ith inform ation provided by OMEGA, either verbal or

w ritten. OMEGA w arrants only that the parts m anufactured by it w ill be as specified and free of

defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSO-

EVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING

ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HERE-

BY DISCLAIMED. LIMITATION OF LIABILITY: The rem edies of purchaser set forth herein are exclu-

sive, and the total liability of OMEGA w ith respect to this order, w hether based on contract, w ar-

ranty, negligence, indem nification, strict liability or otherw ise, shall not exceed the purchase price

of the com ponent upon w hich liability is based. In no event shall OMEGA be liable for consequen-

tial, incidental or special dam ages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic

Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical appli-

cations or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical

application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic

WARRANTY / DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA

harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a manner.

RETURN REQUESTS / INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURN-

ING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER

FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The

assigned AR number should then be marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage

in transit.

FOR WARRANTY RETURNS,

please have the following information available

BEFORE contacting OMEGA:

1. Purchase Order number under which the

product was PURCHASED,

FOR NON-WARRANTY REPAIRS, consult

OMEGA for current repair charges. Have the following

information available BEFORE contacting OMEGA.

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product

under warranty, and

3. Repair instructions and/or specific problems

relative to the product.

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems relative

to the product.

OMEGA’s policy is to m ake running changes, not m odel changes, whenever an im provem ent is possible.

This affords our custom ers the latest in technology and engineering.

OMEGA is a registered tradem ark of OMEGA ENGINEERING, INC.

reproduced, translated, or reduced to any electronic m edium or m achine-readable form , in whole or in part, without

the prior written consent of OMEGA ENGINEERING, INC.

Over 1 0 0 ,0 0 0 Products Ava ila ble

On l i n e a t o m ega .c o m

TEMPERATURE

Ⅺ

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Calibrators & Ice Point References

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Instrumentation & Accessories

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Plug-in Cards for Apple, IBM & Compatibles

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HEATERS

Ⅺ

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ENVIRO NMENTAL

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M3345/070

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