RH-45AUTO (Superficial)

Modular Rockwell Hardness Tester

Operation Instructions

G & R Technology Inc.

General Description

The RH-45AUTO (superficial) Modular Rockwell hardness testers are accurate advanced instruments distinguished by their friendly operation, high accuracy, repeatability, reliability, and versatility. They are used for testing the hardnesses of a variety of metals in different locations. They are automatic test machines built with precise force sensors, force monitoring electronics systems, and depth measurement systems. The RH-45AUTO are made up of a main unit and a set of frames. Each frame is specialized for holding a certain test specimen shape or size. By switching frames on the main unit, you can easily form specialized testers.

The RH-45AUTO can directly measure and produce 15N, 30N, 45N, 15T, 30T, and 45T readings, and can convert to HV and HB scales. The hardness tester has Bluetooth and USB capabilities for sending test results to a Bluetooth printer or PC.

1. The RH-45AUTO are automated testers. Do not touch any movable parts of the tester, such as the indenter, when the tester is operating or injury may occur.

2. Before beginning a test, ensure the indenter is placed in the position sleeve. Otherwise the displacement sensor will be damaged. The tester has a safety feature to detect if the indenter is missing. If so, the presshead will automatically move backwards, and “No Indenter” will FLASH on the display.

3. The presshead and indenter cannot move forward more than 25mm. Any attempt to advance the presshead forward more than 25mm or retract the pressback backward before the starting position will turn off the motor. Use a smaller retaining frame or reposition the tester on the column stand if the test specimen is too small.

Safety and Liability

This instruction manual contains important information on safety, use and maintenance of the RH-45AUTO. Read through these instructions carefully before the first use of this tester. Keep these instructions in a safe place for future reference.

" General warranty terms and conditions of sale and delivery " Warranty and liability claims arising from personal injury and damage to property cannot be upheld if they are due to one or more of the following causes:

· Failure to use the tester in accordance with its designed use as described in this instruction.

· Incorrect performance check for operation and maintenance of the tester and its components.

· Failure to adhere to the sections of the instructions dealing with the performance check, operation and maintenance of the tester and its components.

· Unauthorized structural modifications to the tester and its components.

· Serious damage resulting from the effects of foreign bodies, accidents, vandalism and force majeure.

All information contained in these instructions is presented in good faith and believed to be correct. G & R Technology makes no warranties and excludes all liability as to the completeness and/ or accuracy of the information.

Safety instructions

The tester is not allowed to be operated by children or anyone under the influence of alcohol, drugs or pharmaceutical preparations. Anyone who is not familiar with these instructions must be supervised when using the tester.

1. Technical Specifications

Main unit specifications

RH-150AUTO

RH-45AUTO

Preliminary Load Kg(N)

10 (98.07)

3 (29.42)

Total Test Force Kg(N)

60, 100, 150

(588.4, 980.7, 1471)

15, 30, 45

(147.1, 294.2, 441.3)

Test Scale

A, B, C

15N, 30N, 45N

15T, 30T, 45T

Test Load Control

Load Cell Based Feedback Loop System

Test Cycle Type

Motorized (Auto Load, Test and Return)

Standards Compliant

ASTM E18, ISO 6508, ASTM E140

Resolution

0.1 HR

Data Output

Bluetooth (to Printer ), USB (to PC)

Data Memory

1000 Test Results

Battery

Rechargeable Li-ion Battery

Work Time 6 hours

Charge Time 2 hours

Weight

2 Kg

Dimensions

200mm X 110mm X 46mm

Relevant Directives

EC Machinery Directive (98/37/EC)

EC Electromagnetic Compatibility Directive (89/336/EEC)

Test Specimen Ranges

2. Check Package

The RH-45AUTO is available in two different packages, each containing different frames and accessories. Upon purchase, please find the correct package list below and check if all listed accessories are included.

Package 1: Column style stand package:

RH-45AUTO measurement component 

Diamond indenter

1/16" ball indenter

20-35HRC test block

59-65HRC test block

60-90 HRBW test block

Hex key

11.1V rechargeable battery

12.6V/1.2A battery charger

Column style stand

Fastening fixture

16mm Socket Wrench

60mm plane anvil

60mm V-type anvil

Bluetooth printer and 8.4V/0.8A charger (optional)

Package 2: Retaining frames package:

RH-45AUTO measurement component

Diamond indenter

1/16" ball indenter

20-35HRC test block

59-65HRC test block

60-90 HRBW test block

Hex key

11.1V rechargeable battery

12.6V/1.2A charger

0-25mm retaining frame

25-50mm retaining frame

50-75mm retaining frame

75-100mm retaining frame

Tube-testing frame

self-aligning flat anvil

self-aligning V-type anvil

30mm flat anvil

30mm V-type anvil

Plastic case

Bluetooth printer and 8.4V/0.8A charger (optional)

3. Functional Description

Figures 1 and 2 illustrate the RH-45AUTO hardness tester.

1. LCD Monitor: displays test results, operation descriptions, and prompts.

2. Keys

key: power on/off. Note: the RH-45AUTO hardness tester has a power save function: it will automatically turn off if inactive for 5 minutes.

Function keys: SET, MODE, , : these keys are used for various operations as indicated on the LCD monitor.

    key: Bluetooth transmission - press this key to send data to the printer.

    key: begins test and moves indenter forward.

    key: moves indenter backward.

STOP key: stops indenter’s movement.

3. Indenter and position sleeve: the indenter penetrates into the test specimen. The position sleeve holds the indenter and measures the penetration depth. The position sleeve and presshead both have marked lines. You need to line them up when inserting the position sleeve with indenter into the presshead hole. Then rotate the sleeve to lock it in the presshead.

4. USB connector: connects tester to an USB cable.

5. Charging port: for charging the battery

6. Anvil: holds the test specimens. Different types are available.

7. Locating slot: attaches frames with socket-head screws

8. Frame: holds the anvil. Different frames are available to accommodate different specimen sizes and shapes.

Figure 2: Tester Side View

Available Frames:

1. Retaining frames: the main unit and the retaining frames form a portable hardness tester. The retaining frames have different sizes: 0-25mm, 25-50mm, 50-75mm, and 75-100mm.

2. Tube testing frame: the main unit and the tube testing frame form a portable tube hardness tester.

3. The column frame: the main unit and the column frame form a stand hardness tester. There are a fastening fixture and an anvil on the stand. Attach the tester onto the fastening fixture. To change the height of the tester, unscrew the fastening fixture from the stand, remove it from its slot, and insert it into another slot. Place the test specimen on the anvil. Fine tune the height of the anvil by twisting it. The column stand can be placed in a vertical position or horizontal position.

4. Testing principle and procedure

Press the key to power on the tester. Then, place the test specimen between the anvil and indenter. Then, press the key once to move the indenter towards the test specimen. As the indenter is moving, you can press the STOP key to stop movement. Press the key again to resume movement.

When the indenter pushes against the test specimen, the position sleeve will clamp the test specimen. Then, the indenter's tip will penetrate into the test specimen, creating an indentation.

The indenter will continue to move and apply a force on the test specimen. When the force reaches the preliminary test force F0, the indenter stops moving, wait for a specified dwell time. The tester then measures the indentation depth on the test specimen.

After waiting, the indenter will move again and further deepening the indentation. When the applied force reaches the total test force F, the indenter stops moving and waits a specified dwell time.

After waiting, the indenter moves away from the test specimen, and decreases the force it applies on the test specimen. When the applied force decreases back to the preliminary test force F0, the indenter stops moving and waits for a specified dwell time. The tester then measures the larger indentation depth on the test specimen.

The tester analyzes both indentation depths to calculate the hardness of the specimen. The LCD displays the hardness reading. Finally, you can print the readings to a Bluetooth printer.

5. Pre-Treatment of the Test Piece

Preparation of the test piece surface prior to testing will help insure accuracy.

a. The test should be carried out on a clean surface that is free from oxide scale, foreign matter, and especially lubricants.

b. Preparation should be carried out in such a way that minimizes alteration of the surface hardness (for example, heat or cold-working).

c. The thickness of the test piece should be no less than 0.08 in (2mm).

d. The test piece should have a smooth even surface. The test surface should be polished so that a metallic luster appears. Measurement errors could result from the roughness of the test surface. The roughness (Ra) of the surface must be limited to 1.6 µm.

6. Basic Operations

Powering on the device

Press the key to power on the tester. The LCD will display the main window, which will show the previous test reading:

Set Up a New Test

1. At the main window, press the SET key to start and set up a new test. You will now select the operating parameters. The LCD monitor will prompt for a number of test results in a test group:

2. Press the or keys repeatedly to change the number of test groups per reading. Then press the SET key to input that number and select a testing scale.

3. The LCD monitor will now prompt for a test scale. Press the key repeatedly to cycle through N45, N30, N15, T45, T30, or T15. Each scale has a unique window shown below:

Abbreviation: ST----Steel

4. Each scale’s window prompts for test piece material for converting readings. Press the MODE key repeatedly to cycle through conversion values in Vickers (HV), Brinell (HB). The selected parameter will flash. Note: Only steel (ST) is currently supported for conversion.

5. Press the SET key to return to the main window:

Testing Procedure

1. As an example, we will perform an N45 test. Ensure the diamond indenter is placed in the tester. If not, twist the position sleeve until its notch lines up with the notch on the cylinder:

Then pull out the sleeve and replace the indenter with the correct one:

Reinsert the sleeve and twist to lock the sleeve:

2. Starting in the main window, place the test specimen between the indenter and anvil. Then, press the key to move the indenter towards the test specimen. (While the indenter is moving, you can press the STOP key to stop the indenter, and then press the key again to resume moving.)

3. The indenter will apply a preliminary test force on the test specimen, then stop moving for a specified dwell time. (The LCD monitor displays a timer for elapsed dwell time). The LCD monitor displays this screen:

4. After the dwell time elapses, the indenter automatically resumes moving and applies more force until the force reaches the load force. Then, the indenter stops moving and pauses for a specified dwell time. The LCD monitor displays this screen:

5. After the pause, the indenter automatically moves backwards and decreases the force it applies on the test specimen until the force decreases back to the preliminary test force. Then the indenter stops moving and pauses for a specified dwell time. The LCD monitor displays this screen:

6. After the pause, the indenter continues to move backwards away from the test specimen. You may remove the specimen. The LCD monitor displays this screen:

Finally, the LCD monitor will display the test reading:

Note: Do not touch test specimen during testing, otherwise the test reading will be affected.

Search & Delete Test Readings

1. Search through readings in current test group

From the main window, press the key to search and cycle through the test readings in the current group. If you want delete the currently displayed reading, press the key. The reading will be deleted from memory and you will return to the main window. The LCD monitor now displays the previous test reading. If you want to return to the main window without deleting anything, press the SET key. The previous test reading will be displayed.

2. Delete current test result

From the main window, press the key to delete current test result.

Transmit Data to Printer

1. First, power on the Bluetooth printer. Press the key to start the transmit procedure. The tester will then attempt to pair with the printer, and the LCD window will flash “PAIR”:

2. When both the tester and printer have been paired, the LCD window will display the current test group number. Press the or keys to cycle through and select the group number you wish to print.

Press the key again to transfer the selected data to the printer.

If the printer successfully receives the data, it will print the readings and the tester will return to the main window.

If the printer did not receive the data, the tester’s LCD monitor will display:

After 30 seconds, RH-45 hardness tester will return to main window. Check if the printer is powered on or operational and try transmitting again.

Transmit Data to Windows PC

Initial PC Setup:

Download the Windows driver from the G & R Technology website.

Download and install the program Putty from http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

1. Insert USB cable into the tester’s USB port.

2. Repeatedly press the MODE twice until the LCD window will display “USB TRANSFER”

3. A prompt on your Windows 7 Computer will appear, saying drivers are not installed

4. Enter your Windows 7 control panel. Make sure you are viewing by icons, not category. Run device manager.

5. Locate and expand “Other devices.” MSP430-USB Example should appear with a yellow exclamation mark.

6. Right click on this and select “Update Driver Software.”

7. Windows will now search for drivers for the RH-45AUTO. Press “Browse my computer for driver software.”

8. Locate the directory which contains the driver downloaded from the G & R Technology website.

9. The RH-150AUTO is now assigned a COM number. Take note of this number.

10. Unplug the USB cable and install the program Putty.

Transferring to PC:

1. Turn on the RH-45AUTO tester. Press the MODE key to select the group of readings to transmit. The LCD window should display “USB CURRENT.”

2. Press the SET key to configure the range of test groups to transmit. The parameter BEGIN will flash. This is the first test group of the range to transmit. Press the Press the or keys to change the group number.

3. Press the MODE key again and the parameter END will flash. This is the last group of the range to transmit. Press the Press the or keys to change the last group number.

In this window, the tester will transmit groups 1, 2, 3, and 4 to the PC.

4. Press the SET key after configuring the group range and prepare to transfer. Plug in the USB cable to the tester and PC.

5. Run the Device Manager in Windows to find the COM port of the tester. (See step 9 of the previous section “”Before you start.”)

6. Run the program Putty.

7. Under the “Connection type:” configuration, choose “serial” option

8. In the “Serial line” box, change the COM number to the number assigned by Device Manager (step 5).

9. Click Open

10. The screen will prompt you to press any key. Press any key on your computer’s keyboard.

11. The tester will automatically transfer one group’s readings to the Putty screen. Press any key on the PC to transfer the next group in the range. When all groups have transferred, you may unplug the tester from the PC.

You may select the text and copy the text to a word editor.

7. RH-45AUTO Setup

1. Memory Reset

NOTE: THIS PROCEDURE WILL ERASE AND RESET THE ENTIRE MEMORY! ALL READINGS WILL BE IRRETRIEVABLE!

This function resets the whole memory. First, start with the power off. Simultaneously hold down the and MODE keys. Then hold down the key, and then release the and MODE keys. Finally, release the key. The LCD monitor will display:

2. Timer setup and offset adjustment

The RH-45AUTO hardness tester has a clock for recording the test time. It also has an offset function to increase or decrease all test readings by a certain value, useful for matching readings to a standard test block.

To change these values, first start with the power off. Press and hold down the SET key, and then hold down the key. Then release the SET key. Finally, release the key. The LCD monitor will enter this screen:

Press the MODE key to select USA (Month/Day/Year) or European (Day/Month/Year) date format. The current selection will flash, then press the SET key to confirm selection and the LCD monitor will enter the time screen:

Repeatedly press the MODE key to cycle through and select the year, month, day, hour or minute.

The selected parameter will flash, and press the key or key to adjust that parameter. When finished with all parameters, press the SET key to exit and the LCD monitor will enter the offset screen:

You can offset test readings to match standard test block values. There is a separate offset for each test scale. Repeatedly press the MODE key to cycle through and select a test scale. The selected scale will flash, and press the key or key to adjust the offset value. If the test reading is lower than the test block value by a certain number, ADD that number. Otherwise, if test result is higher than the test block value, SUBTRACT that number. Then the press SET key to exit and the LCD monitor will enter the dwell time screen:

You can adjust the dwell time the tester waits before applying or removing the preliminary and load force. Press the MODE key to cycle through and select Preload (dwell time after applying preliminary force), Load (dwell time after applying load force), or Unload (dwell time after removing load force). The selected parameter will flash. Press the key or key to adjust the number of seconds in that dwell time. Then the press SET key to save and exit, and the LCD monitor will return to the main window:

MAX 00.0

MIN 00.0

AVE 00.0

HV 000

1 005

00.0 N45

8. Hardness Tester Maintenance

Tester Storage and Operating Precautions

The RH-45AUTO testers are precision instruments. When storing or operating the tester, avoid the following:

Dropping the tester or hitting it with another object

Dropping or spilling any oil, grease, or other liquid onto the tester

An environment with heavy dust or gas that could damage the tester

The indenter and anvil should be clean, without any oil, grease, or dirt.

Recharging the Batteries

If the monitor displays the LOW POWER symbol, then the batteries are nearly depleted. Recharge with the following guidelines:

The battery life is rated for 500 charge and discharge cycles.

1. Press key power OFF the tester.

2. Connect the power cord and battery charger.

3. Insert the battery charger's plug to the tester’s charging port.

4. Connect the power cord’s other terminal to an 110V/220V power source. 5. Charge time is approximately 2 hours.

Replacement Parts

When the indenter, the position sleeve, or anvil is worn, or the battery cannot recharge anymore, please contact your distributor or representative for replacement parts.

This book was distributed courtesy of:

For your own Unlimited Reading and FREE eBooks today, visit:
http://www.free-ebooks.net/

Share this eBook with anyone and everyone automatically by selecting any of the options below:

Share on Facebook

Share on Twitter    

Share on LinkedIn

To show your appreciation to the author and help others have wonderful reading experiences and find helpful information too, we'd be very grateful if you'd kindly
post your comments for this book here.

COPYRIGHT INFORMATION

Free-eBooks.net respects the intellectual property of others. When a book's copyright owner submits their work to Free-eBooks.net, they are granting us permission to distribute such material. Unless otherwise stated in this book, this permission is not passed onto others. As such, redistributing this book without the copyright owner's permission can constitute copyright infringement. If you believe that your work has been used in a manner that constitutes copyright infringement, please follow our Notice and Procedure for Making Claims of Copyright Infringement as seen in our Terms of Service here:

http://www.free-ebooks.net/tos.html