This is the large capacity heavy-duty version of our SDHT. Our most accurate and heavy-duty manual tester has “smart” interchangeable load cells. This is a tester that can measure grams to two decimal places and then change load cells and test up to 2,000 pounds. It has a very rugged quad post design to minimize frame deflection and give the user the most versatility and productivity in a single tester.
The SDHT 2000 is made from a combination of billet aluminum and precision ground steel parts. The rack and pinion lever drive can be upgraded to a Micro Length Adjust. It is also equipped with two positive stops to be used for repetitive testing and comes standard with a 0.437” Ø thru-hole for centering shafts for supporting buckling type compression springs. A stroke lock helps keep things in place while you take measurements or configure tooling. The tester has 5/8-18 tooling holes for convenient fitting.
SDHT software includes these powerful software features, making testing easy and productive:
Limit Lights
Part sorting and a statistical summary printout that includes a histogram and data run chart.
Two-Point with Rate
Test two points with spring rate calculation in one deflection of the spring.
Calculated Free Length Measurement
Calculate the free length of a compression spring.
Initial Tension Measurement
Calculate the initial tension of an extension spring.
Specifications
Compression and extension testing of force and length
Built-in 0.437″ thru-hole
Micro-Length Adjust with built-in stops
Internal 8 hour battery for portable use
RS 232 data communications port
User programmable filter
Length / force offset
Customizable print headings
Statistical summary printout
Built-in 1,800 test point data logger
Complete computerized tester diagnostics
20-bit internal force resolution
Tracking or peak modes (2,000 samples / sec)
Load cell and frame deflection compensation
Mechanical and software overload protection
Built-in shunt calibration verification
Digital calibration and linearization
Backlit digital LED display of force and length
Wipe-clean embossed key faceplate
Push-button force and length zeroing
NIST traceable calibration
Includes Length Deflection Compensation
What is length deflection compensation?
All force/length testing devices, regardless of manufacturer, have additional deflection by the load cell and tester frame which occurs as the spring is loaded. If you buy/use a tester without deflection compensation, measurements might include significant length errors.
Spring deflection, also known as spring travel or motion, is the action of a compression spring compressing (being pushed), an extension spring extending (being pulled), or a torsion spring winding (being twisted) when a load is applied or released. This is one characteristic (spring deflection) that is measured by a Larson Systems Spring Tester.
Larson Systems has BUILT-IN Length Deflection Compensation so that the user does not have to calculate and apply length corrections. Most competitors do not have length deflection compensation.
With a Larson Systems product, forget about calculating load cell and frame deflection when testing, we’ve got you covered.
SDC Software Demo
Try our software for “Spring Testing Data at Your Fingertips”. With Larson System’s SDC Software, your spring testing data can be accessed, stored and manipulated as it is generated. Store specifications for different parts, load a set of parameters and clearly see which springs are out of spec using the on-screen graphical representation of the testing results. Save and print results or open the results file in Microsoft Excel. You have complete control of your testing data.
2 Point With Rate is a tester software option that allows you to calculate the rate (or spring constant) between two points. To use this feature, press the Test Mode button to enter 2 Point With Rate mode. Set your first test point by using the tester’s force and length readings as a guide and pressing the F1 button. Set the second test point using the same method. When both test points are set the tester automatically calculates and displays the rate as shown. This is all accomplished in just one deflection of the spring! 2 Point with Rate is a tester software feature. A PC is not needed for this software. Click for print samples!
Calculated Free Length is a tester software option that allows you to calculate the free length of a compression spring. To use this feature, press the Test Mode button to enter 2 Point with Free Length mode. Set your first test point by using the tester’s force and length readings as a guide and pressing the F1 button. Set the second test point using the same method. When both test points are set the tester automatically calculates and displays the rate and the free length as shown. Calculated Free Length is a tester software feature. A PC is not needed for this software.
Initial Tension is a tester software option that allows you to calculate the force required to start separating the coils of an extension spring. To use this feature, press the Test Mode button to enter 2 Point with Initial Tension mode. Find the unloaded length of the spring by using the tester’s force and length readings as a guide and pressing the F1 button. Then set the first and second test point using the same method. When both test points have been set, the tester automatically calculates and displays the rate and initial tension as shown. Initial Tension is a tester software feature. A PC is not needed for this software.
This software option lets the user program the limit lights to make sorting reliable and efficient. This option also uses the programmed limits to enable the Mean, Standard Deviation, Range, Range Chart, Histogram, Cp and Cpk statistical printed outputs. Limit Lights and Full Statistics Analysis is a tester software feature. A PC is not needed for this software. Click for print samples!
Total Spring Inspection
The SSS software can connect to any LSI manual tester, including the DHT and the TST, and virtually any measuring device that can send data via RS232. The SSS can also accept data from the keyboard. By setting up a specific testing method, you can test your springs reliably and repeatedly and generate one comprehensive report.
Force@Length Data at Your Fingertips!
With the Larson Systems’ SDC Software, your spring testing results can be accessed, stored and manipulated as they are generated, giving you complete control of your spring testing data.