Fairbanks Portable Axle Load Scale User Manual

Installation Manual

PALS

Portable Axle Load Scale

50784

Issue 1 04/05

© 2005 by Fairbanks Scales

All rights reserved

Amendment Record

PALS

Portable Axle Load Scale

50784

Manufactured by Fairbanks scales

821 Locust

Kansas City, Missouri 64106

Created 04/05

Issue 1 04/05 New Product

Disclaimer

Every effort has been made to provide complete and accurate information in this manual. However, although this manual
may include a specifically identified warranty notice for the product, Fairbanks Scales makes no representations or warranties
with respect to the contents of this manual, and reserves the right to make changes to this manual without notice when and
as improvements are made.

04/05 2 50784 Issue 1

Table of Contents

Section 1: General Information

A. Introduction . . . . . . . . . . . . . . . . . . . . . . . 4

B. Specifications . . . . . . . . . . . . . . . . . . . . . 4

C. Accessories . . . . . . . . . . . . . . . . . . . . . . . 5

Section 2: Installation

A. Introduction . . . . . . . . . . . . . . . . . . . . . . . 6

B. Site Selection . . . . . . . . . . . . . . . . . . . . . 6

C. Standard Platform Installation . . . . . . . . . . 6

D. Ramp Installation . . . . . . . . . . . . . . . . . . . 8

E. Instrument Installation . . . . . . . . . . . . . . . 8

Section 3: Calibration

A. Platform Cornering . . . . . . . . . . . . . . . . . . 9

Section 4: Service and Maintenance

A. Load Cell Replacement . . . . . . . . . . . . . . 11

B. Junction Box/ PCB Replacement . . . . . . . 12

Section 5: Parts

A. Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 13

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A. Introduction and Description

Fairbanks’ Portable Axle Load Scales (PALS) is an ideal choice for a cost-effective
weighing solution for non-commercial vehicle axle weights.

The scale is constructed in a subframe which eliminates the need for a pier or slab
foundation. Aflat surface such as asphalt or concrete is required to install the complete
unit. By eliminating the foundation, installation and relocation of this scale require minimal
effort. As an example, if a change in process, traffic flow or location occurs, the Fairbanks
Portable Axle Load Scale offers the ultimate in weighing flexibility.

The Fairbanks Portable Axle Load Scale is fabricated from USA extruded structural steel
members. This heavy-duty scale is designed to produce a minimum deflection at its rated
60,000 pound Dual Tandem Axle Capacity (DTAC). The ramps are constructed to the
same standards as the weighbridge. The ramp size comes standard in a full-width design
that will accommodate any wheel base for most highway vehicles.

The PALS is equipped with 50,000 pound rocker column load cells. These load cells are
constructed of stainless steel and are hermetically sealed. They are installed at the
factory to ensure proper alignment which eliminates potential weighing errors.

The Portable Axle Load Scales come standard with an analog junction box, but Intalogix

®

Technology may be used if desired.

B. Specifications

Product Number . . . . . . . . . . .83306

Platform Size . . . . . . . . . . . . .10’ x 7’

DTAC. . . . . . . . . . . . . . . . . . . 60,000 lbs

Deck Dimensions . . . . . . . . . .10’ x 7’

Deck Plate . . . . . . . . . . . . . . .1/4”

Subframe. . . . . . . . . . . . . . . . 6” channel

Full Scale Capacity . . . . . . . . 60,000 lbs x 20 lbs

Shipping Weight . . . . . . . . . . .3,500 lbs

Grade and Location . . . . . . . . Relatively level and solid surface.

Platform must be supported on all corners.

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Section 11:

General Infor mation

B. Specifications continued

Load cell . . . . . . . . . . . . . . . . . . . . . .50k lbs

Rated Output (=RO) . . . . . . . . . .2 mv/v +/- .1%

Calibration (% RO) . . . . . . . . . . .<

+/- 0.05 (< +/- 0.005)

Zero Balance % RO . . . . . . . . . .<

+/- 1.0

Insulation Resistance . . . . . . . . . >

5000 Meg ohms

Input Resistance . . . . . . . . . . . . .1150 ohms +/- 10

Output Resistance . . . . . . . . . . .1000 ohms +/- 1

Maximum Excitation Voltage . . . .15 vdc

Safe load limit %Emax . . . . . . . . .200

Ultimate overload %Emax . . . . . .300

Approvals . . . . . . . . . . . . . . . . . .NTEP; FM

Sealing . . . . . . . . . . . . . . . . . . . .Complete hermetic seal; cable entry sealed by

. . . . . . . . . . . . . . . . . . . . . . . . . .glass to metal header. IP 68

Material . . . . . . . . . . . . . . . . . . .Stainless Steel 17-4 PH (1.4548)

Wiring . . . . . . . . . . . . . . . . . . . .Function

Color

. . . . . . . . . . . . . . . . . . . . . . . . . .Excitation + Green

. . . . . . . . . . . . . . . . . . . . . . . . . .Excitation - Black

. . . . . . . . . . . . . . . . . . . . . . . . . .Output + White

. . . . . . . . . . . . . . . . . . . . . . . . . .Output - Red

C. Accessories

Ramp Product Number . . . . . . . .83558

Ramp Dimensions . . . . . . . . . . . .10’ x 30” x 6”

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