Dr. Hiroaki Kajikawa of NMIJ / Japan will visit NMCC-SASO on the week of January 27-31, 202 to provide technical assistance to help the pressure laboratory on the measurement as follow: - Check and develop the Uncertainty calculation in pressure balance - Explain the principle of traceability of pressure by dimension method. - Development calibration pressure balance by TAC method. The Technical Assistance duration is 5 man-day and the location is NMCC/ SASO Pressure lab. in Riyadh