Calibration Equipment

In many applications where the Clavis belt tension gauging equipment is employed it is demanded by the Quality Assurance procedure that all the gauges used should have a calibration check performed at periodic intervals. Although all Clavis equipment may be returned to the manufactures for the issue of a certificate of calibration, many Q.A. procedures require that a daily or weekly check be made.

The Clavis calibrator is a portable unit which drives a vibrating transducer at precise frequencies within the range of 30 to 600Hz. The transducer is inserted between the sensing head of the belt tension meter and a comparison between the measured frequency and the driving frequency is made. The calibrator automatically steps through the frequency range in 50Hz intervals. All Clavis calibrators are issued with a certificate of calibration traceable to National standards.

The calibrator is equally suitable for both Clavis hand held belt tension meters and Clavis production line belt tensioning equipment.

The calibrator and vibration transducer are supplied in a leather type carrying case. The unit is powered by 4 standard AA size alkaline batteries.

The calibration rig shown above is used to produce accurate frequency against tension tables. The pulleys over which the belt actually passes are first mounted on to  the calibration rig at the correct span distance. One end of the belt is then clamped and the other end is attached to a lever arm. Weights are then added to the lever arm which increases the tension within the belt. Frequency readings are taken as the tension increases. Calibration curves may then be plotted.

We are able to undertake calibrations of this type for customers of our equipment, or the calibration rig may be purchased.