The "Auxiliary Verification Device" as one of the 3 test standards in OIML R76-1: 2006 (E) "Non-automatic Weighing Instruments" is described in detail. Since the Chinese regulation of "Electronic Truck Scale" for verification was issued, the new metrological method of verifying weighing instruments by using Load Measurement Apparatus (LMA) becomes legal in China. The maximum permissible error and the uncertainty of the LMA device are theoretically analyzed and experimentally verified. The results show that the LMA device is a kind of independent auxiliary verification device which meets the requirements of R76.

The gravity acceleration g plays an important role in several physical quantities as provided by National Metrology Institutes. The unit of force is realized in dependence on g in force standard machines (FSM). We present the results of the combination of forward modeling and gravimetric observations to determine the absolute value of g inside the new 200 kN FSM of the Physikalisch-Technische Bundesanstalt (PTB). A model of the machine itself and gravimetric measurements, performed prior and after the installation of the FSM, are compared. The agreement is within 10 nm/s². The final uncertainty concerning g is 1.2 × 10^-7 due to temporal variations typically neglected in force measurements.

Currently the calibration of dynamic load transducers is not a well resolved problem, due to the difficulty in developing a device, which gives precise dynamic force.
There are three lines of research to achieve this capacity: impact, stepped and sinusoidal forces. All of which have the same fundamentals: generation of an inertial force, which is produced by a mass and its acceleration.
At this conference, we wish to show a new line of research to produce a dynamic force based on a gyroscopic device. We have developed and tested a new device based on gyroscopic effect with the aim to calibrate piezoelectric transducers.

In the calibration of torque measuring devices, measurement is to be repeated by changing the rotational mounting position concerned with the measurement axis as evenly as possible to the direction of rotation because the axi-asymmetric of sensing element and mechanical parts in the transducer contribute to the measurement uncertainty. However, in the calibration of reference torque wrenches, there are some kinds of changing way to change the rotational mounting position. Typical way is to change the angle of detachable square drive parts connected to the front of sensing elements in the transducer of torque wrench form. The other is to change the mounting position of sensing elements themselves. The author investigated to compare the calibration results between two ways for the mounting positions using various transducers. As a result, somewhat large differences of calibration results were occurred between two ways depending on transducers.

The mass dissemination needs to be conducted in various air density conditions and even vacuum condition after redefinition of kilogram. This paper discussed the influence of temperature, humidity and air pressure to the air density using the CIPM 2007 forum method to the high precise weighing process. The stability of air pressure to the mass determination process is discussed experimentally using the new M-one mass comparator. When the temperature and humidity are well controlled inside the weighing laboratory, the air pressure should also be controlled to achieve precise mass measurement. Due to the change of air pressure, airflow and vibration with regard to the weighing hanger can be arisen. The vibration of weighing hanger is from both the base and the airflow. Under air pressure control, the standard deviation of weighing process can be reduced to 0.39 µg. Experimental results indicate that weights with hollow structure in the middle can reduce the influence of air pressure to the weighing process.