Apparatus and method for portable calibration of electrofusion controllers

A device for calibrating an electrofusion controller for use in fusing thermoplastic pipes, the device comprising:

• a housing having means for connecting the device to an electrofusion controller,
• a microcontroller sub-system within the housing in communication with the electrofusion controller, and
• at least one computer-controlled relay in communication with and controlled by the microcontroller subsystem, and
• a measurement sub-system within the housing in communication with the microcontroller sub-system and the electrofusion controller,
• wherein the measurement sub-system includes a first independent measurement device and a second independent measurement device, and
• wherein the microcontroller sub-system causes the electrofusion controller to supply a first fusing current, the measurement sub-system measures a first electrical parameter corresponding to the first fusing current using the first independent measurement device within the housing, the microcontroller sub-system adjusts a pre-defined parameter of the electrofusion controller based upon the measured first electrical parameter to calibrate the electrofusion controller, the microcontroller sub-system causes the electrofusion controller to supply a second fusing current, the measurement sub-system measures a second electrical parameter corresponding to the second fusing current using the second independent measurement device within the housing, the microcontroller sub-system calculates a difference between the second electrical parameter and the pre-defined parameter, and the microcontroller sub-system indicates an error if the difference is greater than an allowable error.