TOHNICHI CTB2-G (01) PDF DOCUMENT

Please adhere to the following warnings when using the TOHNICHI CTB2-G:

1. Use only dedicated charger and storage battery: Please do not use any other chargers or storage batteries not designated in the manual.

2. Charge correctly:

• Please use the charger only listed in the manual. It may generate heat unusually and there is fear of fire.

• Do not charge a storage battery where temperature is less than 0 degrees C, and more than 40 degrees C. Doing so may cause the battery to burst or set on fire.

• Please charge a storage battery in a well-ventilated place.

• Please do not cover a charger or a storage battery with cloth etc. Doing so may cause the battery to burst or set on fire.

• When not using the charger, extract the plug from the outlet to avoid electric shock or fire.

3. Take the circumference situation of the work place into consideration:

• Please do not use the main part, a charger, and a storage battery in rain, or in a place which became wet or got wet. Doing so could cause electric shock, component failure or fire.

• Keep the work place well lit to avoid any accidents.

• Please do not use or charge in a place where inflammable liquid and gas exist. It may cause explosion or fire.

4. Surely use designated accessories and optional articles only: Please do not use other accessories and optional articles not designated in this manual. Doing so may cause an accident or injury.

5. Do not put a storage battery into fire: It may burst or a toxic substance may come out.

6. Do not disassemble or remodel the instrument: It may damage safety, or function, and cause lower durability, or failure.

7. Switch lever, ratchet firmly (Standard accessory interchangeable head: QH): Ratchet slip may cause accident, injury or failure.

8. Do not connect a pipe to make the handle longer: It may cause breakage of the body or be the reason for an accuracy problem.

9. Take countermeasures to use in a high place: Drop of the body or socket may cause accident, injury or reason of failure.

1. Keep a work place always clean: Untidy place or work stand may cause an accident.

2. Do not bring a child to the work place: A child could be accidentally injured.

3. When you do not use it, keep it in a right place: Keep the work place when not using and always put all equipment and tools away to avoid any injuries. Do not keep any main part or battery in a place where the temperature will go to 50 degrees C or more. Doing so may cause degradation to the battery. Battery can also start to smoke and/or start on fire.

4. Do not force the tool to work: In order to work efficiently and safely, please work with the torque range of the tool and the part that the tool is being used on.

5. Use the tool to fit the work: Always make sure that you use the proper size tool with the proper torque range for each part. Forcing the tool can cause injury to one’s self and damage to the tool.

6. Do not handle the battery cord roughly: Do not carry a battery by its cord. Do not put the cord by heat, gas, oil, or a sharp corner. Doing any of the above can cause electric shock and/or fire by short.

7. Always brace yourself and maintain balance: Not doing so may cause injury to one’s self.

8. Maintain carefully: Exchange of accessories should follow the manual. It may cause injury. Check cord periodically. If damage is found, replace it with a new one. A damaged cord can cause electric shock, fire, and/or other injuries. Keep the grip area and in good condition. Keep out of oil and grease.

9. Check case and other parts for any damage before usage: Check all functions for any damage before usage. Do not use a charger if the inlet plug and/or cord are damaged. Do not use a charger if it is dropped and something is damaged. It may cause electric shock and fire by short. Ask distributors or Tohnichi for damaged case, other parts replacement, and repair.

(1) Charge only with a charger attached.

(2) Only use the battery model designated in this manual.

(3) Do not cause shock or vibration to this instrument.

(4) Only use this tool in the way that the manual states.

(5) Check starting inspection before usage, and confirm the setting.

(6) This instrument has a possibility of trouble or breakage if wet by water or oil.

(7) Do not drop or hit this instrument because it may cause trouble or breakage.

(8) Use this instrument within the measuring range of the manual.

(9) Do periodical inspection for this instrument.

(10) Do zero adjustment before measurement.

(11) Surely hold the effective line of the handle to do accurate measurement, and apply force at a right angle to the torque wrench.

(12) Connect body and interchangeable head surely.

If there is a strange smell or fire on usage, stop use. Move this instrument to a safety place, and contact Tohnichi.

A Nickel metal hydrogen battery is used on this product. Do not dispose of an unnecessary battery and recycle it to protect resources. Ask your nearest distributor or Tohnichi Japan or overseas facilities for recycling information.

The TOHNICHI CTB2-G is a digital torque wrench designed for re-tightening inspection of a tightened bolt. By conducting a retightening operation, an operator can easily detect the torque that was applied to the tightened bolt. It is an upgraded version of the CTB model.

1. Anyone can easily check the bolt on applied the tightened bolt.

2. Measuring results differ little depending on individuals.

3. Saves measuring time.

4. 7 segment LED used for bright display of digital values.

5. Memory capacity expanded to 999pcs (Conventional model: 50pcs).

6. Can be used for both clockwise and counter-clockwise measuring.

1) Main Body – 1 pc

2) Standard Accessories:

• Battery pack BP-5 – 1 pc

• Interchangeable head QH – 1 pc

• Quick Charger – 1 pc

3) Operating Instruction – 1 pc

The retightening torque method measures the torque at which a tightened bolt starts to rotate again as further torque is applied. The tool identifies the “T-point” (Tt), which is the torque value where the friction settles and increases at a steady pace after overcoming static friction. This T-point value is an accurate inspection of the original tightening torque (TT).

The retightening measured values are classified into 3 kinds:

• The torque which overcomes the static friction of the bolt (A point).

• The torque at which the bolt starts to turn continuously (B point).

• The maximum torque at this inspection (C point).

The TOHNICHI CTB2-G uses the T-point method, where it analyzes the torque-angle graph to determine the stable point, providing a more accurate measurement of the original tightening torque.

1. Interchangeable Head: A QH interchangeable head comes as a standard accessory. Other heads like SH, SH-N, RH, QF, RQH, DH, HH, FH are also attachable. Note: PH (Pipe Wrench Head) cannot be attached.

2. Protection cover: It protects the CTB2-G from physical damage and breakage.

3. LCD display: It displays the memory counter, time, residual battery indication, and unit.

4. 7 segments LED display: It displays the torque value.

5. Retightening completion/Judgement LED: After completing retightening, a blue LED turns on for OK, and a red LED turns on for NG.

6. Power key: Turns the power on/off. After turning on, the tool should be kept still for a few seconds for an automatic angle speed check.

7. ▲ key: Sends the memory counter forward by one, and reads out the data if any. If you keep it pressed, it skips by 10pcs.

8. ▼ key: Reverses the memory counter backward by one, and reads out the data if any. If you keep it pressed, it skips by 10pcs.

9. MD key: Press this key in PEAK mode to turn to external output mode. Pressing this key for more than 2 seconds in RUN mode turns it to setting mode.

10. MEM key: Saves the measured data and sends the memory counter forward by one.

11. C key: Clears the measured data.

12. Handle: The BP-5 battery pack is stored inside.

13. Cap: Remove this cap (counter-clockwise thread) when exchanging the battery pack.

14. Recharging jack: Connect the BC-3 battery charger to this terminal.

15. External output terminal: Connect a communication cable to this terminal.

16. Reset switch: Use this switch only when an error occurs. Do not use it at every recharge.

• Auto zero function (Torque): Activated by pressing the C key in RUN mode. This function only works when the displayed torque is below 7.5% of the max capacity torque. If it’s over this value, “Err9” will be displayed.

• Angle speed check and adjustment function: This check is conducted automatically when the power is turned on or when the tool is held still for 2 seconds or more. The wrench must not be moved during this adjustment, or “Err0” will appear.

• Auto memory/reset function: Measured data can be automatically saved after a set timing (0.1 – 5.0 seconds), and the counter will advance to the next number. This can be disabled by setting the time to 0.0 seconds.

• Judgement function: It judges whether the measured value is within the allowable torque range (upper/lower limit). Blue LED indicates OK, and red LED with a buzzer indicates NG.

• No sound function: The buzzer sound for key operations can be set to “OFF”.

• Power saving function: If unused for more than 1 minute, the 7-segment LED will turn down. It turns up again when any key is pressed or torque is applied.

• Auto power off function: Power will automatically turn off after a designated time (Default: 3 minutes). This can be set to 10 min, 30 min, or OFF.

• Residual battery indicator: A 4-level icon on the LCD shows the remaining battery. A blinking “LoBATT” indicates the battery is empty and needs immediate charging.

• Over torque alarm: If applied torque exceeds 105% of max capacity, the buzzer goes off and “—–” is displayed. In PEAK mode, “E-3” and the torque value will be displayed alternately. Data cannot be saved.

The following table lists the torque ranges, over torque alarm levels, and peak hold start values for different TOHNICHI CTB2-G models. The over torque alarm activates at 105% of max torque. The auto zero range is below 7.5% of max torque.

※ For units other than N·m, calculate the torque value based on the unit conversion table in the settings section.

1. Data sampling mode:

• RUN mode: Set counter to “000”. Displays the torque value currently being applied.

• PEAK mode: Set counter to “001-999”. Torque value increases as you apply torque, and the peak value remains on the display after releasing. After retightening, the T-point value will be calculated and displayed.

2. Measurement mode:

• NORMAL (Default): Standard measurement mode.

• LONG: A mode for retightening long bolts or using long sockets where twisting might affect standard measurement. If you get an error or a very small torque value in NORMAL mode, try this setting.

3. Memory mode:

• M999 mode (Default): Max. 999 pcs of measured data can be saved. External output includes measured time (clock).

• M99 mode (CTB compatible): Max. 99 pcs of data can be saved. External output format is compliant with the older CTB model.

4. Display mode:

• Dual display mode (Default, “LED”): LCD shows counter and clock, while the 7-segment LED shows the torque value.

• LCD display mode (“LCD”): Power saving mode. The counter and torque are displayed on the LCD. The 7-segment LED is turned off.

1. Set the counter to a memory location (e.g., 001-999) to start retightening in PEAK mode.

2. As you apply torque, the peak torque value (C Point) is displayed.

3. Continue applying torque smoothly. When the tool detects the T-point, the buzzer will sound and the blue LED will turn on.

4. Release the torque. The calculated T-point value will be displayed.

5. If using judgement mode, the result will be shown simultaneously:

• OK: The blue LED turns on.

• NG: The buzzer sounds and the red LED turns on.

6. Press the MEM key to save the data and proceed to the next counter. Press the C key to clear the current data without saving.

Note: If you attempt to retighten a bolt when a T-point value is already displayed, the buzzer will sound and “—-” will be shown alternately with the torque value.

Reading Out Measured Data:

1. Use the ▲ key to move forward through the memory counters and the ▼ key to move backward.

2. The display will show the memory number and the saved T-point value for that measurement.

Using the Calculation Function:

This function calculates the number of samples, maximum, minimum, and average torque for a selected range of data.

1. While in memory mode, use the ▲/▼ keys to navigate to the upper limit of the data range you want to analyze (e.g., memory location 050).

2. Press the MD key. The display will show “STT” (Starting counter of Calculation).

3. Use the ▲/▼ keys to select the lower limit of the data range (e.g., memory location 001).

4. Press the MD key. The display shows the number of samples in the selected range (e.g., “n 50”).

5. Press the MD key again to view the maximum (MAX) torque in the range.

6. Press MD again to view the minimum (MIN) torque.

7. Press MD again to view the average (AVE) torque.

8. Press MD or C key to return to the memory display. Pressing C at any step cancels the calculation.

Transfer Measured Data to an External Device (PC/Printer):

• To output 1 data point: Use ▲/▼ keys to select the data, then press the MEM key to output.

• To output a range of data:

1. Use ▲/▼ keys to select the upper end of the data range.

2. Press the MD key. “STT” will be displayed.

3. Use ▲/▼ keys to select the lower end of the data range.

4. Press the MD key. The number of samples to be output is displayed.

5. Press the MEM key to output all data in the range at once. (Press C to cancel).

Delete Measured Data:

• To delete 1 data point: Use ▲/▼ keys to select the data you want to delete, then press the C key.

• To delete a range of data:

1. Use ▲/▼ keys to select the upper end of the data range to be deleted.

2. Press the MD key to enter range selection mode.

3. Use ▲/▼ keys to select the lower end of the data range.

4. Press the MD key. The number of samples to be deleted is displayed.

5. Press the MD key and C key at the same time. The selected data will be deleted, and the tool returns to measuring condition (counter 001, torque 0.0).

Communication Settings:

• Synchronous method: asynchronous

• Baud rate: 2400 / 4800 / 9600 / 19200bps (Default: 2400bps)

• Data length: 7bit / 8bit (Default: 7bit)

• Stop bit: 1bit

• Parity: EVEN / ODD / NONE (Default: NONE)

PC Output Format:

• M999 mode: R E , 9 9 9 , 1 0 0 . 0 , 0 9 / 2 1 , 1 2 : 5 9 : 5 9 CR LF

(Header, Counter (3 fig.), Torque (decimal point), Y/M/D, T:M:S, Delimiter)

• M99 mode: R E , 9 9 , 1 0 0 . 0 CR LF

(Header, Counter (2 fig.), Torque (decimal point), Delimiter)

Printer (EPP16M3) Output Format:

• Printing 1 data (M999 mode):

999: 123.4 N·m

09/21 12:45:10

• Printing all data (M999 mode):

1: 100.0 N·m

09/21 12:46:12

2: 101.2 N·m

…

N=3

MAX: 102.3 N·m

MIN: 100.0 N·m

AVE: 101.2 N·m

1. In RUN mode (counter at “000”), press the MD key for 2 seconds or more until the display changes to the settings menu.

2. The first setting item (e.g., “SEL NORMAL”) will appear.

3. Use the ▲/▼ keys to change the value or selection for the current setting.

4. Press the MEM key to save the change and proceed to the next setting item.

5. To skip to the next setting without saving, press the MD key.

6. To exit the settings menu and return to RUN mode at any time, press the C key.

The following table lists the available settings:

When you change the measurement unit, all memory and torque setting values are converted based on the N·m value. Converted figures are rounded, which may result in a small margin of error.

Note: “kgf·cm” and “lbf·in” units are not included in the CTB850N2x32D-G model.

1. Enter the settings menu by pressing and holding the MD key for 2 seconds.

2. Press the MD key repeatedly to cycle through the settings until you reach the clock/date settings (“rtC1” for H:M:S, “rtC2” for Y:M:D).

3. At the “rtC1 12:59:59” screen, press the MEM key. The display will switch to date setting (“rtC2 10.09.21”). Pressing MEM again switches back.

4. To set the time (H:M:S):

• At the “rtC1” screen, use ▲/▼ keys to select the hour, then press MEM to confirm and move to minutes.

• Use ▲/▼ keys to select the minutes, then press MEM to confirm and move to seconds.

• Use ▲/▼ keys to select the seconds. The clock starts from the set second when you press MEM key.

5. To set the date (Y:M:D):

• At the “rtC2” screen, use ▲/▼ keys to select the year, then press MEM to confirm and move to month.

• Use ▲/▼ keys to select the month, then press MEM to confirm and move to day.

• Use ▲/▼ keys to select the day, then press MEM to confirm. This returns you to the RUN measuring mode.

Preparation (PC):

1. Install the driver to your PC. The driver is enclosed with the communication cable No. 584 (CTB2-G → PC).

2. Provide settings for the PC port and communication format to match the wrench.

Preparation (CTB2-G):

3. In the wrench’s settings menu, select “PC” for Communication Mode and “8 bit” for Data Length. Select the appropriate baud rate.

Communication & Data Output:

4. Connect the communication cable between the wrench and the PC.

5. Start up the communication software on your PC. You must activate the software after connecting the cable for successful communication.

6. To output data, follow the standard data transfer procedures (e.g., press MEM key for single data point).

Note: It is not possible to connect more than one TOHNICHI CTB2-G to the same PC.

The battery pack (BP-5) can be recharged about 500 times on average. If it gets old, replace it with a new one.

1. Rotate the end cap on the handle counter-clockwise to remove it.

2. Align the bump on the new battery pack with the dent in the handle inlet and slide it in.

3. Connect the battery connector.

4. Push the battery in to the end.

5. Carefully push the cable and the connector into the handle, ensuring the cables do not get tangled.

6. Tighten the end cap by rotating it clockwise.

Connect the charging jack of the CTB2-G to the plug of the exclusive charger (BC-3-100, BC-3-200). When charging is finished, the charging completion lamp (green) on the charger will turn on. If the battery is empty, it will take approximately 3.5 hours to charge.

Important Note: The older CTB charger (QC-1, QC-2) cannot be used for the CTB2-G.

Warnings:

1. Use the electric power of the charger as surely indicated on the plate.

2. Overcharging will shorten the life of the battery. Stop charging soon after the completion lamp turns on.

3. The torque wrench cannot be used while the charger is connected.

4. If an error happens (completion lamp green and charging lamp red both on), stop charging immediately and contact your distributor.

5. Charging must be done in a temperature range between 0 – 40 degrees C.

6. If you feel a strange smell or unusual heat during use, stop immediately, move the wrench to a safe place, and contact Tohnichi.

7. If the wrench is not used for a long time, take the battery out after charging and store it. Give it a charge at least once every half year.

Torque Range

Dimension, Weight, and Accessories

General Specifications

• Err0: Error occurred at angle sensor.

This is an angle speed detection error. Turn the power off, put the wrench down still, and turn it back on. If the error remains, contact your distributor.

• Err1 – Err5: Appears when a key is pressed during power-on self-test.

This indicates a membrane switch error. Turn the power off, ensure no keys are pressed, and turn it back on. If the error remains, contact your distributor.

• Err8: Error occurred at data memory.

Contact your distributor for repair.

• Err9: Error occurred at torque sensor or circuit board.

This appears during an Auto Zero attempt when torque is too high. Press the C key at no load condition. If the error disappears, it can be used. If it remains, contact your distributor.

• E-1: Appears when inappropriate measuring method is applied.

The collected data was not enough to compute the T-point. Apply a smoother force or tighten further. Press C or MEM key and try again. Refer to “Points to Remember in Measurement”.

• E-3: Appears when excessive torque (105% or more of capacity torque) is applied.

Press the C key and try the measurement again, ensuring not to exceed the wrench’s capacity.

• E-4: Appears when the measured value is abnormal.

The measured value is beyond the capacity torque or is a negative value. This can happen if the tightened application itself is moving. Ensure the application is securely fixed and try again.

• Choose the appropriate mode: If you are using the TOHNICHI CTB2-G for a long bolt or long sockets of a twist nature (like a hex socket), it may result in an error value (very small torque value). In such cases, change the setting from “NORMAL” mode to “LONG” mode and try the measurement again.

• Hold the torque wrench level: If the torque wrench is tilted, it may cause a miscalculation of bolt rotation. Make sure you hold it level so that it does not tilt.

• Fix the tightening application securely: The TOHNICHI CTB2-G uses both torque and angle increase to calculate the value. If the application itself moves, it may affect the accurate calculation and result in an abnormal value.

• Retighten until the buzzer sounds: You must retighten a bolt further until the buzzer sounds and the blue LED turns on. If the collected data is not enough for computing, the T-point cannot be determined, and an “E-1” error will flash. Press C key to measure again.

• Apply a smooth and steady hand force: Apply force to the torque wrench smoothly and steadily until the buzzer sounds and the blue LED turns on. If retightening is stopped mid-measurement, an accurate result may not be achieved due to subtle changes in static friction.

1. Battery Pack: (BP-5)

2. Quick Charger (100V – 240V): (BC-3-G)

3. Interchangeable Head: (SH, RH, QH, RQH, DH, HH, FH). Note: PH (Pipe Wrench Head) cannot be used.

4. Communication Cable:

• CTB2 – EPP16M3 (D-SUB9pin female) (Catalogue No. 575)

• CTB2 – PC (D-SUB9pin female) (Catalogue No. 575)

• CTB2 – PC (USB A type) (Catalogue No. 584)

5. Tohnichi Original Printer: (EPP16M3)

Note: The battery pack, battery charger, and communication cable dedicated for the previous model “CTB” are not compliant with those of the CTB2-G. However, the interchangeable head and the dedicated printer are compatible.