APG MLS Operating Manual

AUT OMATION

Operator’s Manual

PRODUCTS

GROUP, INC.

MLS Series

Mechanical Float Level Sensors

Rev. B1, 4/07

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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

MLS Series Rev. B1, 4/07

Table of Contents

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

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

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

Operating Principle.........................................................................................5

Installation .........................................................................................................6

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

Technical Notes ................................................................................................8

Maintenance/Inspection ..............................................................................8

Adjustment Procedure ..................................................................................9

Troubleshooting ........................................................................................... 10

Dimensions .....................................................................................................11

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APG...Providing tailored solutions for measurement applications

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

Rev. B1, 4/07 MLS 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

MLS Series Rev. B1, 4/07

• Introduction

The MLS series mechanical  oat level sensor is designed to be used in any
open tank or vessel for top mounting and with all liquids compatible with
stainless steel. This model is intended to provide emptying and  lling control.

• Specifi cations

Electrical Characteristics

Max. Contact Rating ........... 250 V, 10 AC / 250 V, 0.3 A DC

Withstand Voltage .............. 1500 VAC 1 minute or more. (Between each

terminal and non-charge part)

Insulation Resistance ......... 100 Mý or more (measured with 500 VDC megger

between each terminals and non-charge part)

Mechanical Characteristics

Buoyancy of Float ...............Approx. 2.10 N (SG = 1)

Allowable Impact ................ 100 m/s

2

Operational Characteristics

Control Width ....................... 0.6 ~ 850 mm (see  gure on page 6)

Speci c Gravity ....................0.85 or more

Float Submersion ................ 51 mm

Gap Between Rod

and Float ................................4.5 mm

Environment

Working Temperature ........ 0 to 80°C

Application ............................Leave open tank

Other

Construction ......................... IP42

Terminal Box .........................Phenol (Cover: Polypropylene)

Wetted Parts.......................... 304 Stainless Steel (Bellows: Polycholoroprene

Rubber)

Cable Inlet ..............................Equivalent JIS F 20a (G 3/4)

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

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