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

2

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.

APG...Providing tailored solutions for measurement applications

4

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

PWS Series Rev . A1, 4/07

The PWS can be install using one of the following methods:

• Screw-in Mounting: Provide G 3/4” female thread.

• Bulkhead Mounting: Drill a 28 mm (1.1 in. dia.) hole. Insert and tighten
the nut, washer, and gasket.

• Flange Mounting: Use the optional JIS 5K65A sized  ange.

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

6

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

Rev . A1, 4/07 PWS Series

• Paddle Variety and Dimensions

The polycarbonate four vane is designed for general use on bulk density

3

as low as 0.3 g/cm

(18.7 lb./cu. ft.). Use at high and low level, top and side

mounting.

Stainless steel paddles, 304SS or 316SS, are available in one or two vane.
One vane version designed for general use on side mounting. It is suitable

3

for high density as 2.0 g/cm

(12.5 lb./cu. ft.). Especially suitable for use in high

operating temperature, model PWS-T.

Special two vane is designed for use at top or side mounting on very light

materials less the 0.02 g/cm

3

(1.25 lb./cu. ft.).

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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

7

PWS Series Rev . A1, 4/07

PWS-Z Series (PWS-Z and PWS7-ZL)

Wiring should be in accordance with all local codes.

2

Control cable from 0.5 mm

to 3.5 mm2 is recommended.

Contact Capacity (Resistive)
250 V 3 A AC
30 V 4 A DC
Power Consumption 1.5 VA

NOTES:

1. The earth ground terminal is grounded to the housing.

2. The cable entry must be properly  tted to preserve IP65 after wiring.

CAUTION: Make sure the supplying voltage and the wire color matches. The

wrong voltage or miswiring may damage the sensor.

WARNING: To avoid personal injury, DO NOT remove the housing cover

when power is applied.

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

8

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

Rev . A1, 4/07 PWS Series

• Wiring

PWS-X Series (PWS-X, PWS-XL, and PWS-XT)

Wiring should be in accordance with all local codes. The PWS provides 5

2

cores 0.5 mm

PVC insulated cable. Install solderless terminals or sleeves to

the end of the conductors.

Contact Capacity (Resistive)
250 V 3 A AC
30 V 4 A DC
Power Consumption 1.5 VA

CAUTION: Make sure the supplying voltage and the wire color matches. The

wrong voltage or miswiring may damage the sensor.

WARNING: To avoid personal injury, DO NOT remove the housing cover

when power is applied.

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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

9

PWS Series Rev . A1, 4/07

• Start Up

The sensitivity can be adjusted to suit diverse level control installations and
variations in material characteristics. By changing the spring position on the
set plate, the amount of torque required to signal an output can be altered.
The position may be changed by means of plier or by hand.

PWS-X Series PWS-Z Series Features
A 630 g/cm (3.5 lb./in.) 500 g/cm (2.8 lb./in.) For light or  ne material
B 560 g/cm (3.1 lb./in.) 390 g/cm (2.2 lb./in.) Standard (preadjusted)
C 470 g/cm (2.6 lb./in.) 315 g/cm (1.8 lb./in.) For heavy and sticky
materials or high vibration
location.
D 390 g/cm (2.2 lb./in.) 270 g/cm (1.5 lb./in.) For heavy and sticky
materials or high vibration
location.

10

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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

Rev . A1, 4/07 PWS Series

• Maintenance

When cleaning and checking the container, free the paddle and shaft from
deposit. The unit which detects the level of sticky materials or is installed in a
humid location must be cleaned at periodic intervals.

Tighten the housing cover and cable entry to protect the unit from rain,
splashing water, etc.

• Make sure that the power supply is turned o .

• Remove the housing cover (by turning it counterclockwise).

• Remove lead wires by melting the soldered area with a soldering iron.

• Remove the micro switch (loosen one screw).

• Install the replacement switch and tighten the screw.

• Re-solder lead wires. Refer to  gure below.

• Check wiring and operation.

• Reinstall and tighten the housing cover.

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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

11

PWS Series Rev . A1, 4/07

• Shaft and spindle is damaged.

Remedies

• Connect the power.

• Repair power supply

• Wire correctly

• Calibrate sensitivity or replace paddle

• Install sensor in good location

• Replace unit.

Symptom

Paddle is not covered by materials. Relay energized.

Possible Causes

• Insu cient power supplied.

• Miswiring

• Heavy deposit on shaft

• Material has dead stock

• Temperature too high

• Shaft is bent or damaged.

Remedies

• Connect the power.

• Repair power supply

• Wire correctly

• Calibrate sensitivity or replace paddle

• Install sensor in good location

• Replace unit.

Symptom

Relay chatters

Possible Causes

• Insu cient power supplied

• Loose cables

• Material too  uid

Remedies

• Repair power supply

• Tighten connections

• Use a time delay relay.

APG...Providing tailored solutions for measurement applications

12

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

Automation Products Group, Inc.

Rev . A1, 4/07 PWS Series

• Troubleshooting

Symptom

Paddle is covered by material. Relay de-energized.

Possible Causes

• Power Supply not connected.

• Insu cient power supplied.

• Miswiring

• Material too light.

• Material has bridge or angle of repose.

• Spare Parts

Model Description Part Number
PWS-X-ACC-C PWS-X PC Cover 22408
PWS-X-ACC ( ) PWS-X Motor (specify voltage) On Request
PWS-X-ACC ( ) PWS-X Motor assy w/microswitch On Request
(specify voltage)
PWS-X-ACC10 PWS-X Flange, SS304, JIS 5 K 65 A 22905-0019
2 mm thick
PWS-X-ACC2 Motor (110 VAC) 22293
PWS-X-ACC3 PWS-X 4 vane (PC) paddle 22103
(80 mm dia. x 30 mm)
PWS-X-ACC4 PWS-X 1 vane (SS304) paddle 22175
(60 mm dia. x 30 mm)
PWS-X-ACC6 PWS-X2 vane (SS304) paddle 22905-0015
(150 mm dia. x 60 mm)
PWS-X-ACC7 PWS-X 2 vane (PC) paddle 22905-0016
(150 mm dia. x 60 mm)
PWS-X-ACC8 PWS-X 2 vane (SS304) paddle 22905-0017
(80 mm dia. x 35 mm)
PWS-X-ACC9 Motor Assy (110 VAC) w/ microswitch 22905-0018

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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

13

AUT OMATION

PRODUCTS

GROUP, INC.

APG...Providing tailored solutions
for measurement applications

Automation Products Group, Inc.

Tel: [phone]
1/435/753-7300
Fax: [phone]

e-mail: [e-mail]

www.apgsensors.com

Automation Products Group, Inc.

1025 W. 1700 N.

Logan, UT 84321