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Larson Systems Inc.

ECT / CDHT / FDHT / DHT

User Manual

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Summary of Contents for CDHT Series

Page 1: ...Larson Systems Inc ECT CDHT FDHT DHT User Manual...

Page 2: ......

Page 3: ...anual COPYRIGHT 2003 Larson Systems Inc LSI All rights reserved No part of this manual may be reproduced by any means without written permis sion of the author except portions necessary for internal u...

Page 4: ...l RS 232 Interface 10 3 2 Optional Automatic Force Resolution Selection 11 3 3 Length Lock 11 3 4 Setting Micro Adjust Length Stops 12 3 4 1 Compression Stops 12 3 4 2 Extension Stop 13 4 0 Tester Cal...

Page 5: ...tegrated force and length measurements the length reads accurately at any force This eliminates the need to use look up tables to correct for the displayed length error LARSON Hand Tester s length rea...

Page 6: ...t 220VAC 50 hz power supply CDHT Options High resolution force for more accurate load measurements at low loads 10X resolution from 0 20 of FS DigitalLengthPrecisionUpgrade 0005 resolution Micro Lengt...

Page 7: ...ing considerations Do not apply more force than the tester is designed for the tester has overload stops to protect it to twice the rated capacity Force readings are not accurate above the rated limit...

Page 8: ...t i c a p a C n o i t u l o s e R S F 0 2 0 S F 0 0 1 0 S F 0 0 1 0 2 b l 0 1 b l 5 0 0 0 0 b l 5 0 0 0 g k 6 4 g 2 0 g 2 N 5 4 4 N 2 0 0 0 N 2 0 0 b l 0 1 1 b l 5 0 0 0 b l 5 0 0 g k 0 5 g k 2 0 0 0...

Page 9: ...2 0 0 g 2 0 N 9 8 N 2 0 0 0 0 N 2 0 0 0 b l 0 1 b l 5 0 0 0 0 b l 5 0 0 0 g k 6 4 g 2 0 g 2 N 5 4 4 N 2 0 0 0 N 2 0 0 b l 0 1 1 b l 5 0 0 0 b l 5 0 0 g k 0 5 g k 2 0 0 0 g k 2 0 0 N 9 8 4 N 2 0 0 N 2...

Page 10: ...at encase the tester Check to make sure that you have the following items as shown in Figure 1 SAVE PACKAGING TO RETURN TESTER TO LSI FOR CALIBRATION 4 Stop Rods 0 1 or 2 These items are placed in the...

Page 11: ...p Rods from the top of clamping member leaving rods protruding sufficiently to permit free platform movement Use black knobs to tighten stop Clamps around Stop Rods as required The platform lock on th...

Page 12: ...evision the second line is the length resolution Next it will display The force display should show zero or a small reading Press Zero Length to activate the length reading 3 1 2 Power Off Note Turn o...

Page 13: ...as follows Compression After power up move the upper platform fully up and press zero force so the force display reads zero Move the upper platform to a position which touches the Lower Platform exert...

Page 14: ...be used to verify the accuracy of the force readings This mode electrically simulates a load Comparing the displayed value to the calibration report will verify the accuracy of the tester Press the Mo...

Page 15: ...force levels 3 3 Length Lock The length lock shown in Figure 8 locks the upper platform under load at any selected position in the length range Using this feature simplifies setting the length stops a...

Page 16: ...justment Positive stop locking requires only light clamping force because of the rod thread engagement Compression Stops Place your spring on the lower platorm Determine the two specified lengths for...

Page 17: ...ight stop rod Loosen the left clamping knob and remove and reinsert the extension rod in the reverse direction through the sliding stop block head down figure 11 Set the left stop rod to the extension...

Page 18: ...rce Calibration 1 Starting with the tester off press on to turn on the tester Allow to remain on for 30 minutes before making any adjustments 2 Move the upper platform to its maximum up position 3 Pre...

Page 19: ...he range adjust screws to 13 ft lb 2 Place the dial indicator Larson Part Number 025 0000 202 on the lower platform Move the upper platform to an appropriate height 3 Check the TIR of the indicator ov...

Page 20: ...display NDF negative deflection force on the left side of the display 4 Install hook set Interlock the hooks and apply a 20 to 30 FS load Press zero length 5 Apply a 5 FS extension load on the tester...

Page 21: ...or loss in operating performance due to environmental conditions such as humidity dust corrosive chemicals deposition of oil or other foreign matter spillage or other conditions beyond our control The...

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Page 24: ...Larson Systems Inc 763 780 2131 10073 Baltimore St NE 1 877 780 2131 Minneapolis MN 55449 4425 Fax 763 780 2182 www larsonsystems com info larsonsystems com...

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