Home 5 Certifications, Calibration, Compliance, and Symbols

Certifications, Calibration, Compliance, and Symbols

Calibration Information

Tohnichi Product Calibration Certificate

  • Torque wrenches are measuring instruments. The calibration certificate is the document that certifies the accuracy of the torque products, which are traceable to Japanese national standards. Please keep the calibration certificate for future reference.
  • Preset tools do not have external scales; therefore no calibration certificate is provided. Customers may request a specific torque set value at the time of order along with a certificate confirming the set value for additional fees.
  • Tohnichi America provides an additional certificate option that is traceable to NIST. (National Institute of Standards and Technology-USA) A NIST traceable certificate can be requested for an additional fee.
  • Some digital products indicated as global “-G” models have the ability to change units of measure by keypad selection. The certificate of calibration will be provided in SI units of measure as standard. If the certificate of calibration is required in Metric or American units, then it must be requested at the time of order for an additional fee.
  • The factory certification can immediately be used in ISO9000 plants without the need for further acceptance inspection or any additional certifications.
  • The calibration certificate is effective for 3 years from the date of inspection at the factory or 1 year from the date of first. Fill in the date of first use in the space provided on the certificate for your records. Therefore, the original factory certificate has 2 years of shelf life and 1 year of use for a total of 3 years


  • Accuracy % is calculated on each indicated value. Accuracy stated as “+/- a percentage + 1 digit” indicates that the digital display will round up to the next digit in resolution if the value falls between digits.

Durability and Calibration Intervals

  • Manual torque tools are normally guaranteed up to 100,000 tightening cycles or 1 year whichever comes first. Tohnichi hand tools can also be used up to 1,000,000 tightening cycles if the function is properly maintained and adjusted at every 100,000 tightening cycles.
  • Tohnichi recommends minimum yearly calibration but users may consider more frequent intervals depending on the level of usage and level of quality control required.

Compliance and Symbols

ISO Certification Tohnichi Mfg. Co. Ltd Japan

ISO/IEC 17025:2017 Certification Tohnichi America USA

JCSS/Japan Calibration Service System

Tohnichi Mfg. Co. Ltd’s torque standards calibration laboratory is now an authorized calibration service provider of JCSS/Japan Calibration Service System under Japanese measurement law. Registration number: JCSS0281. Based on this, Tohnichi has launched a JCSS calibration service for DOTE(3)-G and DOTE(4)-G torque wrench testers from 10 N•m to 1000 N•m as a validated JCSS system and an uncertainty certificate service for outside of the above-stated torque range. Tohnichi issued JCSS calibration certificate is recognized internationally based on MRA/Mutual Recognition Arrangement of ILAC/International Laboratory Accreditation Cooperation and APLAC/Asia Pacific Laboratory Accreditation Cooperation by IAJapan/International Accreditation Japan.

What does MRA stand for?

  • An MRA (Mutual Recognition Arrangement) is an agreement under which multiple countries recognize each other’s conformity assessments.
  • Under an international mutual recognition agreement, accreditation organizations participating in the agreement perform mutual assessments. Management and operation of accreditation organizations are based on 1S0/IEC 17011 international standards. Assessments determine whether 1S0/IEC 17025 accreditation standards are being followed.
  • Tohnichi Manufacturing’s Torque Standards Calibration Laboratory is an accredited entity under an international MRA and is qualified to issue torque wrench tester calibration certificates with the ILAC-, MRA-, and JCSS- registered accreditation symbols.

Restriction of Hazardous Substances Directive (RoHS)

  • Following RoHS, which restricts the use of certain hazardous materials in product manufacturing. Tohnichi has expanded its efforts in environmentally friendly procurement. Starting with our Product Catalog 2011 edition, the “RoHS” mark is shown on all applicable models conforming to the RoHS directive. For details, please contact Tohnichi.
RoHS compliant

Electrostatic Discharge (Susceptibility)

  • An electrostatic sensitive device (often abbreviated ESD) is any component (primarily electrical) that can be damaged by common static charges which build upon people, tools, and other non-conductors or semiconductors. ESD commonly also stands for electrostatic discharge.
  • The ESD symbol, below, indicates that the device is sensitive to ElectroStatic Discharge and you should not touch the device without taking measures to avoid electro-static discharge which may affect the function of the device.
Electrostatic Discharge
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