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Gilson AC-250 Operating Manual

Automatic concrete compression machine
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OPERATING MANUAL
Automatic Concrete Compression Machine
AC-250, AC-325, AC-450
AC-250
AC-325
AC-450
The Automatic Concrete Compression Machine frames are manufactured from structural steel
angles welded to the top and bottom crossheads or main frame of a solid steel plate.
The AC-250 has the hydraulic cylinder assembly mounted to the top crosshead, with force being
applied downward. This design eliminates foreign material build-up around the piston-cylinder area.
The AC-325 and AC-450 have the hydraulic cylinder assembly mounted to the bottom main
frame of the compression machine and force is applied upwards. A metal shroud helps to
protect the piston-cylinder area from concrete fragments and debris.
Please read through the entire manual to fully understand the operations of the Gilson
Automatic Concrete Compression Machines.
Rev: 6/2022
PHONE: 800-444-1508
FAX: 800-255-5314
P.O. Box 200, Lewis Center, Ohio 43035-0200
740-548-7298
Email: customerservice@gilsonco.com
Product Web Page: globalgilson.com
740-548-5314

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Summary of Contents for Gilson AC-250

  • Page 1: Introduction

    The AC-250 has the hydraulic cylinder assembly mounted to the top crosshead, with force being applied downward. This design eliminates foreign material build-up around the piston-cylinder area.

  • Page 2: Table Of Contents

    Automatic Concrete Compression Machines AC-250, AC-325, AC-450 CONTENTS Introduction ..................................1 Safety Warning ................................. 3 Machine Specifications ..............................4 1.0 Receiving ................................5 1.1 Inspection ................................. 5 1.2 Uncrating ................................5 1.3 Initial Cleaning ..............................5 1.4 Daily Cleaning..............................5 2.0 Installation ................................

  • Page 3: Safety Warning

    ASTM C39, the Compression Machine should be calibrated again "on original installation or immediately after relocation." Gilson does not provide calibration services directly, but can provide a list of calibrators in your area. Contact our Technical Department at 800.444.1508 or techsupport@gilsonco.com.

  • Page 4: Machine Specifications

    Automatic Concrete Compression Machine AC-250, AC-325, AC-450 Automatic Concrete Compression Machine Specifications AC-250 AC-325 AC-450 Load Capacity Range 2,500–250,000lbf 3,250–325,000lbf 4,500–450,000lbf Vertical Opening 19.625in (498.48mm) 19.25in (488.95mm) 19.125in (487.775mm) Horizontal Opening 9.25in (234.95mm) 9.5in (241.3mm) 9.5in (241.3mm) Ram Diameter 6in (152.4mm) 6.75in (171.45mm)

  • Page 5: Receiving

    1.0 RECEIVING Inspection Items are shipped in new condition and packed to withstand normal shipping risks. The Purchaser is responsible for checking all packages for damage or loss before accepting any shipment. 1.2 Uncrating To properly uncrate your new testing machine: •...

  • Page 6: Hmi (Touchscreen Interface) Installation

    2.2 HMI (Touchscreen Interface) Installation The HMI system is a touchscreen interface. It is packed separately and will need to be mounted to the Concrete Compression Machine. • Remove the touchscreen interface from its custom packaging and save it in the event it needs to be shipped again. •...

  • Page 7: Installation Of Accessories

    For the AC-250 series, the set screw is partially obscured when the loading piston is in the home position. To access the set screw, advance the piston about 1in and place the hydraulic control in the hold position.

  • Page 8: Operation

    Each machine is fully serviced and calibrated at the factory. However, ASTM C39 requires that machines be calibrated after final installation or relocation. Contact Gilson Technical Support at: 800.444.1508 or techsupport@gilsonco.com for assistance in finding an independent calibrator in your area.

  • Page 9: Safety

    Lexan® also permits clear viewing of the test in process. • Piston over-travel limit switches come standard on all Gilson Automatic Concrete Compression Machines. These switches prevent travel of the piston beyond the 2.5in stroke limit of the testing machine.

  • Page 10: Touchscreen Interface Buttons

    6.2 Touchscreen Interface Buttons • JOG ADVANCE: This allows the user to jog advance the main ram. The ram only moves while the button is being pressed. Therefore, the button must be held to advance. Releasing the button will stop the advance and hold the ram in position.

  • Page 11: Display Fields

    Fig. 6b: Machine Parameters (Machine Setup) Window • MACHINE SETUP: This brings up a screen containing various units of measure and machine options (see Fig. 6b). A user can toggle on/off the checkbox for either the touchscreen or over-travel limit switch detection. It is strongly recommended to leave the over-travel limit switch detection on if the frame is equipped with the device.

  • Page 12: Specimen Information

    Fig. 6c: Display Fields on Main Test / Run Screen 6.4 Specimen Information DROP-DOWN BOX - Select the specimen/test type to be run. This allows access to various specimen setup input parameters. Care should be taken when entering the dimensions, as specimen stress is calculated from this parameter.

  • Page 13: Data Logging

    OPTIONAL MACHINE CONFIGURATIONS Optional machine configurations are available for Gilson Automatic Concrete Compression Machines. Options include Dual Frame machines, Dual Range machines, and Ram Displacement Measurement (for speed control). • Dual Frame machines have a two-step process to change the frame selected. The operator must move the AB valve to the opposite position and press the button on the main screen for the primary frame or secondary frame.

  • Page 14: Modulus Of Elasticity (Moe), Or Moe And Poisson's Ratio

    7.1 Modulus of Elasticity (MOE), or MOE and Poisson’s Ratio Modulus of Elasticity (MOE) testing can be selected from the specimen type drop-down menu on the main screen if optional equipment was factory-installed on the machine. Before you can start a MOE test, you must break a companion specimen in standard compression mode to get the strength of the specimens.

  • Page 15: Bleeding Air From The System

    Contact Gilson Technical Support at: 800.444.1508, or techsupport@gilsonco.com for assistance in performing maintenance or identifying replacement parts for your Automatic Compression Machines.

  • Page 16: Accessories And Replacement Parts

    MCA-42 6x12in Gap Measurement Tool • MCA-42 6x12in Gap Measurement Tool Included with compression machine 11.0 TECHNICAL SUPPORT Contact Gilson Technical Support for assistance with operation, maintenance, or repair of the Automatic Concrete Compression Machine. • Telephone: 800-444-1508 • Email: techsupport@gilsonco.com •...

This manual is also suitable for:

Ac-325Ac-450

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