APG PWS Operating Manual

AUT OMATION

Operator’s Manual

PRODUCTS

GROUP, INC.

PWS Series

Rotating Paddle Level Sensor

Rev . A1, 4/07

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • E-mail: [e-mail]

PWS Series Rev . A1, 4/07

Table of Contents

Warranty .............................................................................................................3

Introduction ......................................................................................................4

Speci cations ....................................................................................................4

Installation .........................................................................................................5

Paddle Varieties and Dimensions ..............................................................7

Wiring ..................................................................................................................8

Start Up ............................................................................................................ 10

Maintenance ..................................................................................................11

Troubleshooting ........................................................................................... 12

Spare Parts ......................................................................................................13

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

Rev . A1, 4/07 PWS Series

• Warranty and Warranty Restrictions

APG warrants its products to be free from defects of material and workmanship
and will, without charge, replace or repair any equipment found defective
upon inspection at its factory, provided the equipment has been returned,
transportation prepaid, within 24 months from date of shipment from factory.

THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES
ALL OTHER WARRANTIES NOT EXPRESSLY SET FORTH HEREIN,
WHETHER EXPRESSED OR IMPLIED BY OPERATION OF LAW OR
OTHERWISE INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.

No representation or warranty, express or implied, made by any sales
representative, distributor, or other agent or representative of APG which is
not specifi cally set forth herein shall be binding upon APG. APG shall not be
liable for any incidental or consequential damages, losses or expenses directly
or indirectly arising from the sale, handling, improper application or use of the
goods or from any other cause relating thereto and APG’s liability hereunder, in
any case, is expressly limited to the repair or replacement (at APG’s option) of
goods.

Warranty is specifi cally at the factory. Any on site service will be provided at
the sole expense of the Purchaser at standard fi eld service rates.

All associated equipment must be protected by properly rated electronic/
electrical protection devices. APG shall not be liable for any damage due
to improper engineering or installation by the purchaser or third parties.
Proper installation, operation and maintenance of the product becomes the
responsibility of the user upon receipt of the product.

Returns and allowances must be authorized by APG in advance. APG will
assign a Return Material Authorization (RMA) number which must appear
on all related papers and the outside of the shipping carton. All returns are
subject to the fi nal review by APG. Returns are subject to restocking charges as
determined by APG’s “Credit Return Policy”.

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

3

PWS Series Rev . A1, 4/07

• Introduction

The PWS rotating paddle level sensor is made speci cally for solid level
detection. The rotating paddle on the shaft is designed to detect the presence
of powders in small bins and hoppers up to 39 inches (1 m).

• Specifi cations

Operational Versions

PWS-X: Indoor model

PWS-Z: Outdoor model

PWS-XT: High Temperature

Characteristics

Detection Torque Range: 630; 560; 470; 390 g/cm (PWS-X)
500; 390; 315; 270 g/cm (PWS-Z)

Supply: 24, 100, 110, 120, 200, 240 VAC 50/60 Hz

Power Consumption: 1.5 VA

Motor Rotation: 1 rpm (50 Hz); 1.2 rpm (60 Hz)

Output Contact Rating: (SPDT): 250 V 3 A AC;
(Resistive Load) 30 V 3 A DC

Physical Attributes

Enclosure Protection: IP40 (PWS-X); IP65 (PWS-Z)

Material:

Housing: ADC and polycarbonate (PWS-X)
ADC and ABS (PWS-Z)

Mounting: Galvanized Brass

Spindle: SS304

Paddle: Polycarbonate or SS304 or SS316

Shaft Seal: PTFE washer, NBR oil seal and
molybdenum grease

Mounting: G 3/4

Automation Products Group, Inc.

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Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

Rev . A1, 4/07 PWS Series

• Installation

Unpacking

When unpacking, do not damage the sensor with mechanical shock. After
unpacking, make sure that products you ordered are complete. If any part is
missing, wrong or damage, please contact APG.

Installation

Install the sensor in an area which meets the following conditions:

• The ambient temperature range:

- Detecting area: 14 to 160°F (-10 to +70°C)

PWS-XT: 14 to 250°F (-10 to +120°C)

- Housing: 14 to 115°F (-10 to +45°C)

• Indoor environment

• Humidity and vibration are low.

• Open container and nonhazardous area.

• Ample space for maintenance and inspection.

When using for high level control, pay attention to the angle of repose.
When using for low level control, prevent the PWS from being surrounded by
dead stock.

NOTE: Keep the paddle and
shaft out of the direct  ow.
Failure to do this may damage
the sensor.

Caution!: To avoid burns, do
not touch the radiator  n. It is
hot!

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

5