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L&W Crush Tester
Edi tion 1.4 e 2006-01-26
Speci fi ca tions are sub ject to change with out prior no tice.
Lo rentzen & Wet tre re serves the right to make im prove ments and/or changes in the prod uct(s) and/or pro gram(s) de scribed in this
docu ment at any time. Changes are pe ri odi cally made to the in for ma tion and will be in cor po rated in new edi tions of this docu ment.
All ef forts have been made to en sure the ac cu racy of this docu ment. How ever, should any er rors be de tected, Lo rentzen & Wet tre would
grate fully ap pre ci ate be ing in formed of them.
In case of er rors in this docu ment, Lo rentzen & Wet tre shall not be li able for in ci den tal or con se quen tial dam ages in con nec tion with or
aris ing from such er rors.
Copy right © 2006 Lo rentzen & Wet tre. All rights re served.
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Summary of Contents for L&W Crush Tester 248
- Page 1 L&W Crush Tester Edi tion 1.4 e 2006-01-26 Speci fi ca tions are sub ject to change with out prior no tice. Lo rentzen & Wet tre re serves the right to make im prove ments and/or changes in the prod uct(s) and/or pro gram(s) de scribed in this docu ment at any time.
- Page 2 L&W Crush Tester Code 248 War ning All running of tests and servicing work must be carried out by suitably qualified personnel. Read and follow the instructions given in this manual. A high compressive force is exerted between the tester platens (5000 N, 1000 lbf, 500 kgf).
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Page 3: Table Of Contents
L&W Crush Tester Code 248 Contents Introduction ............5 Delivery specification . - Page 4 L&W Crush Tester Code 248 4 (41)
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Page 5: Introduction
L&W Crush Tester Code 248 Introduction Introduction The Lorentzen & Wettre Crush Tester Code 248 is designed for testing corrugated board and its components, and the compressive strength of small cartons. Thanks to its design stability, the tester is able to maintain the parallelism of the compression platens, thus eliminating the risk of so-called falling flutes during the test. -
Page 6: Delivery Specification
L&W Crush Tester Code 248 Introduction Equipped with suitable accessories, the tester can perform the following tests: Corrugated crush test Concora medium test Ring crush test Concora liner test Edge crush test Pin adhesion test Score quality test (TAPPI 829) Delivery specification A standard delivery includes the following items: Item... -
Page 7: Technical Description
L&W Crush Tester Code 248 Technical description Technical description Control panel Top, moving platen Lower platen Integral printer Emergency stop 7 (41) -
Page 8: Control Panel
L&W Crush Tester Code 248 Technical description Control panel Speed High Force CHECK STOP MODE High DOWN REPORT Display panel showing gap between platens, the test readings and the number of the test in a series MODE Selection & indication of property to be tested and recorded. Press and release to scroll down. -
Page 9: Ports
L&W Crush Tester Code 248 Technical description Ports The following ports are provided on the back of the tester: Label Function RS 232 Port for external PC. Also used for some settings, calibration and transmission of test readings. PRINTER Port for external printer POWER INPUT Port for mains power Choosing the system of units to be used The tester can be set to display the readings in SI units, the foot-pound system or in... - Page 10 L&W Crush Tester Code 248 Technical description 10 (41)
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Page 11: Installation
L&W Crush Tester Code 248 Installation Installation Unpack the crush tester and check the delivery specification to ensure that nothing is missing and that none of the items is damaged. Stand the tester on a vibration-free bench at a suitable height. Electrical power supply The tester receives a 24 V DC supply via the in-line power adaptor. - Page 12 L&W Crush Tester Code 248 Installation Before the tester is checked or used, it must be left to stand, with the power switched on, for at least half an hour to give the electronics time to stabilize. This presupposes that the tester is already at ambient temperature.
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Page 13: Operation
L&W Crush Tester Code 248 Operation Operation War ning All running of tests and servicing work must be carried out by suitably qualified personnel. Read and follow the instructions given in this manual. A high compressive force is exerted between the tester platens (5000 N, 1000 lbf, 500 kgf). - Page 14 L&W Crush Tester Code 248 Operation Selecting the test mode (MODE) The tester can store up to 15 test modes, that is, record readings for 15 different properties. Mode is the standard setting for testing the breaking force and cannot be changed by the user.
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Page 15: Operating The Top Platen
L&W Crush Tester Code 248 Operation Statistics—printed out at end of test series Individual readings printed out immediately. Full statistics printed at end of test series. If PC connected, individual readings sent to that. Data transfer—individual readings sent to PC. Operating the top platen The top, moving platen is operated by means of three buttons: STOP... -
Page 16: Running The Test
L&W Crush Tester Code 248 Operation Running the test Make sure that the CHECK function is not active—all the LEDs adjacent to CHECK should be Off. Check that the required test mode and report have been selected. If necessary, make any changes as detailed in 4.2 Settings. - Page 17 L&W Crush Tester Code 248 Operation The platen continues to descend and the reading (force or calculated property) is shown continuously on the display. Breakage is recorded when the force has decreased by a given percentage (value can be altered via the PC) of the maximum recorded force, whereupon the platen stops and returns at transport speed to the position from which it started.
- Page 18 L&W Crush Tester Code 248 Operation 4500 4000 3500 3000 2500 2000 1500 1000 Example of a plot on a force—compression graph for an FCT. Place the sample on the lower platen, centring it carefully under the top platen, such that the flutes are parallel with the long sides of the lower platen. This is to take advantage of the enhanced lateral alignment of the top platen and, hence, to prevent falling flutes during the test.
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Page 19: Report Modes
L&W Crush Tester Code 248 Operation The relevant values used for reporting thickness and hardness can be checked by printing out a list of the settings (see 5.2 Inspection | Settings). Values can be altered by the PC. Score Quality Test (SQT) The score quality test (SQT) requires the use of special accessories consisting of a U-channel support for the sample, and a pressure bar and holder assembly. -
Page 20: Using An External Printer
L&W Crush Tester Code 248 Operation out automatically at the end of the test series or if the operator has terminated the test by pressing * * * * * Lorentzen & Wettre * * * * * L&W Crush Tester, Mode 6 FCT 100 cm²... - Page 21 L&W Crush Tester Code 248 Operation Sending data to a PC An external PC can be connected to the tester’s RS 232 port. This port enables individual readings to be sent as they are generated. If a statistics-only report has been selected, no readings will be transmitted.
- Page 22 L&W Crush Tester Code 248 Operation 22 (41)
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Page 23: Inspection And Maintenance
L&W Crush Tester Code 248 Inspection and maintenance Inspection and maintenance War ning All running of tests and servicing work must be carried out by suitably qualified personnel. Read and follow the instructions given in this manual. A high compressive force is exerted between the tester platens (5000 N, 1000 lbf, 500 kgf). - Page 24 L&W Crush Tester Code 248 Inspection and maintenance Speed Press the button. The LED adjacent to will now light up. Press the Check Speed button to start the check. Movement of the top platen will now be checked at three different speeds: 10.0, 12.5 and 48.0 mm/min.
- Page 25 L&W Crush Tester Code 248 Inspection and maintenance Settings (Set) Press the button. The LED adjacent to will now come on. Press Check print out a list of all the program test modes for the system of units chosen. The following table shows the items that can appear on the printout.
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Page 26: Loading A Printer Roll
L&W Crush Tester Code 248 Inspection and maintenance To exit the check function, press CHECK , whereupon all the LEDs will be extinguished. * * * * * * * * * * * * * * * * * * * * * L&W Crush Tester Check report Date:.... - Page 27 L&W Crush Tester Code 248 Inspection and maintenance A red mark on the edge of the roll indicates that the roll is nearing its end. The printer senses when it is out of paper and generates fault code E 402 on the display.
- Page 28 L&W Crush Tester Code 248 Inspection and maintenance 28 (41)
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Page 29: Controlling The System Via A Pc
L&W Crush Tester Code 248 Controlling the system via a PC Controlling the system via a PC Some of the settings, instrument calibrations and other operations are performed via an external PC. The necessary software, L&W System Assistant, is on a CD-ROM supplied with the tester and is available in English only. -
Page 30: Test Readings
L&W Crush Tester Code 248 Controlling the system via a PC Test readings A number of different tests can be run via the computer. Select the tab on the Test menu and then the type of test required: Test required Function Remarks Measure... -
Page 31: Test Mode (Mode)
L&W Crush Tester Code 248 Controlling the system via a PC Menu item Options Function Mode 1–8; 12–18 Selection of test mode. See section 4.2 Settings System of Report uses SI units units Technical Report uses technical units Report uses foot-pound-system units Re port Print statistics See section 4.2 Settings... - Page 32 L&W Crush Tester Code 248 Controlling the system via a PC Item Function Option/Limit Mode Select test mode—property to be measured 1–8; 12–18 Name Test-mode name Max 10 characters Unit Report unit for this mode Max 7 characters Note Additional information on test mode Max 10 characters Factor The factor used to convert the force reading...
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Page 33: Calibration: Force/Position
L&W Crush Tester Code 248 Controlling the system via a PC Calibration: Force/Position Special equipment is needed to calibrate the tester. Calibration should only be performed by service technicians from Lorentzen & Wettre or authorized service representatives. It is possible to incorporate a correction factor to enable the readings in the tester reports to achieve better correspondence with readings obtained from other testers. - Page 34 L&W Crush Tester Code 248 Controlling the system via a PC Ad van ced Menu item Function Check Check functions (for use by Lorentzen & Wettre service technicians only) Re set instrument Resets the tester Ge ne ral reset Clears (deletes) all the settings and calibrations from the tester Help Menu item...
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Page 35: Appendices
L&W Crush Tester Code 248 Appendices Appendices Technical data Measuring range 50–5000 N (10–1000 lbf; 5–500 kgf) Resolution Platen size 125 × 125 mm Stroke 76 mm Top platen speed 1–50 mm/min Fast mode 60 mm/min (approx.) Mains supply 90–240 V, 50–60 Hz (Threshold values: 85–264 V, 47–63 Hz) Power demand 75 W... -
Page 36: D Test-Piece Preparation Equipment
L&W Crush Tester Code 248 Appendices Test-piece preparation equipment L&W ECT Cutter Billerud Code 008 L&W Strip Punch Code 108 L&W Circular Cutter Code 123 Fault codes and messages The following fault codes and messages may be displayed: E124 Top platen locked E210 Top platen at upper end of travel E211... -
Page 37: F Transmission Of Test Data To External Pc
L&W Crush Tester Code 248 Appendices Transmission of test data to external PC The tester will send data to the PC if one of the following types of report has been selected: “Individual readings printed out immediately. Full statistics printed at end of test series.”... - Page 38 L&W Crush Tester Code 248 Appendices Protocol Byte 1 STX (hex 02) Start character Byte 2–5 ’0248' Tester code Byte 6 hex b0 Sta tus by te 1 (not used) Byte 7 hex b0 Sta tus by te 2 (not used) Byte 8 System of units ‘0’...
- Page 39 L&W Crush Tester Code 248 Appendices Transmission of curve data If the PC replies with an ENQ (0x05), the tester will send up to 1 500 force readings for the latest test. Note that no readings will be sent if SQT is performed. Byte 1–n ‘1234’...
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Page 40: G Factory Settings For Test Modes
L&W Crush Tester Code 248 Appendices Factory settings for test modes Please note that the settings shown in the tables below are those preset by the factory. The settings can be altered by an external PC (see section 6 Controlling the system via an external PC). For details of current settings, see 5.2 Inspection | Settings. - Page 41 L&W Crush Tester Code 248 Appendices Foot-pound system MODE Name Unit Formula Factor Start position** F (N) × 0.224809 0.224809 F (N) × 0.224809 0.224809 0.4 in lbf/in F (N) × 0.224809 / 6 (in) 0.037468 1.1 in F (N) × 0.224809 0.224809 2.0 in ECT 1 in...
- Page 42 L&W Crush Tester Code 248 Appendices...
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