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Related Manuals for General EMHT40
Summary of Contents for General EMHT40
- Page 1 HARDNESS TESTER ASTM RATED—PEN STYLE USER’S MANUAL EMHT40 Please read this manual carefully and thoroughly before using this product. 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com...
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Page 2: Table Of Contents
APPENDIX—Non-conventional support rings…………………………………. 21-22 INTRODUCTION The EMHT40 is a pen-style instrument that uses the Leeb testing method to measure the hardness of any metal or surface for a wide variety of industrial purposes. The Leeb method is notable for its accuracy, wide measuring range and operating simplicity. - Page 3 Typical applications for the EMHT40 include measuring the surface and coating hardness of installed machines and components, die molding surfaces and bearings. Up to 1250 test results can be stored in the EMHT40’s memory and ported to a PC for display as an Excel table or graph.
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Page 4: Key Features
Leeb hardness values (HL) can be converted to values using other hardness units such as HV, HRC, HRB, HB and HS. The EMHT40 can also display readings using several of these hardness units. However, to maintain the accuracy of measurements all hardness values must describe not just the testing method but the type of impact device as well. -
Page 5: What's In The Package
2-minute Auto Power Off 2-year limited warranty WHAT’S IN THE PACKAGE The EMHT40 comes in a hard plastic carrying case inside a cardboard box. Inside the case are: The pen-style EMHT40, incorporating a “D” type impact device. -
Page 6: Product Overview
This user’s manual PRODUCT OVERVIEW The two following images show a typical EMHT40 display and the multiple functions provided by the three-button keypad on the bottom of the unit. Familiarize yourself with the position of all indications and the functions of the controls before moving on to the Setup Instructions and Operating Instructions. -
Page 7: Setup Instructions
Memory location Remaining battery charge Number of measurements used for averages Material Direction of impact Keypad On/Off/Save Setting Select/Move/Delete Select/Set/Change display style SETUP INSTRUCTIONS... - Page 8 The “D” type impact device built into the EMHT40 will provide optimal results for work pieces with a surface roughness of 2μm. A work piece should not be tested: 1) If its temperature is above 176 F (80 C); 2) It is within a strong magnetic field;...
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Page 9: Navigating The Menus
To power on the EMHT40, press the button. The typical display shown in the Product Overview section will appear. To power off the EMHT40, press and hold the button for at least 3 seconds. NAVIGATING THE MENUS Briefly pressing (but not holding) the button opens the EMHT40’s main menu screen of 10... - Page 10 Doing so resumes display of the main menu screen. Hint: Try not to take too much time to make your menu selections. The EMHT40 has an Auto Power Off function that will automatically power off the unit during any 2-minute period during which no buttons are pressed.
- Page 11 2. Selecting 2. AVG. TIMES displays the text AVERAGE TIMES over a number representing the number of readings used to calculate an average value. Choices range from 2 (the default) to 8. In most cases, choosing 3, 4 or 5 readings yields good results.
- Page 12 The first value available for viewing or changing is the upper hardness limit. The small “up” arrow (see following screen shot) will first appear below the “thousands” digit on the UPPER line. If the thousands digit is missing, that means the upper hardness limit is less than 1000.
- Page 13 upper hardness limit. As with the thousands digit, you must press the button as many times as necessary to reach the desired value of the hundreds digit. Then press button to save the hundreds digit setting and shift the arrow to the “tens” digit of the upper hardness limit.
- Page 14 1 to any number from 1 to 12. Then press the button. The display will show the text PLEASE WAIT as the EMHT40 assembles stored measurements into a batch with the assigned number. When -14-...
- Page 15 The EMHT40 will respond by showing the text PLEASE WAIT as the EMHT40 deletes the data in the specified memory location(s). When the deletion process is complete, the unit will automatically resume display of the main memory screen.
- Page 16 Selecting 1. SEQUENCE calls up a screen with the text SEQUENCE over two lines: START and a 4-digit value, and FINISH and a 4-digit value. By alternating presses of button (to view or change the value of each digit) with presses of the button (to save settings and select the next digit in turn), you can designate the number of the starting and ending memory locations to involve in batch data transfers to a PC.
- Page 17 The small up arrow will initially be under the + or – sign to the left of CAL. DATA. By alternating presses of the button (to change the plus sign to a minus sign, or vice- versa) with presses of the button (to change the values of the two CAL.
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Page 18: Operating Instructions
OPERATING INSTRUCTIONS To power on the EMHT40, press the button. The typical display shown at left below will appear. To power off the EMHT40, press and hold the button for at least 3 seconds. Hint: Pressing the button with the measurement screen on the LCD changes the display... - Page 19 Note that this alternate display style sacrifices details (at the bottom of the LCD) for a larger readout. Before making a measurement, be sure the work piece complies with the weight, shape, thickness and temperature guidelines detailed in the Setup Instructions. To make a measurement: 1.
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Page 20: Interfacing With A Pc
Use the included USB cable to tether the EMHT40 to the PC via the mini-USB jack on the top of the instrument (above the LCD). You may need to reassign the numbers of your PC’s COM ports to enable the PC and the EMHT40 to communicate using the USB cable. -
Page 21: Operating & Maintenance Tips
Using the AC adaptor, it takes about 4 hours to fully charge the battery from a completely discharged state. Trickle-charging the battery from a PC’s USB port takes longer. Over time, the tip of the impact body will abrade and reduce the EMHT40’s measurement accuracy. Whenever measured values seem unusually large, calibrate the instrument by following the procedure described on pages 16 and 17. - Page 22 03-03.7 Z10-15 For cylindrical outside surfaces R10 to R15 03-03.8 Z14.5-30 For cylindrical outside surfaces R14.5 to R30 03-03.9 Z25-50 For cylindrical outside surfaces R25 to R50 03-03.10 HZ11-13 For cylindrical inside surfaces R11 to R13 03-03.11 HZ12.5-17 For cylindrical inside surfaces R12.5 to R17 03-03.12 HZ16.5-30 For cylindrical inside surfaces R16.5 to R30 03-03.13 K10-15...
- Page 23 For spherical inside surfaces SR16.5～SR30 11 03-03.17 HK16.5-30 For cylindrical outside surfaces with a radius 12 03-03.18 ---- adjustable from R10 to ∞ 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com -23-...