As shipped by Laurel Electronics, all ranges of Laureate digital panel meters are fully calibrated, with calibration factors stored in EEPROM. This allows different ranges to be selected via plug-in jumpers, with no need to recalibrate the meter for each new range. The 0-200 mV scale serves as the reference scale. All other scales apply multipliers to this scale.
This calibration page applies to the following Laureate meters:
Calibration of these meters requires a temporary serial data connection to a PC and use of special Laureate Calibration software, which is downloadable at no charge by clicking on the links below. Calibration entails the application of a known reference signal to each scale and the automatic calculation of a multiplier so that the reading corresponds to that signal. In case of a DC meter, the 200.00 mV scale is calibrated first because it serves as a multiplier for the other scales. When a 200.00 mV signal is applied, the meter will actually read 80000 during calibration. The reading is multiplied by a factor of 4 to assure a more accurate calibration.
Computer-assisted calibration can be manual or automatic. In manual calibration, the computer screen prompts the operator step by step on which jumpers to set and reference signals to apply, and then to press the Enter key on the computer keyboard. In automatic calibration, the computer controls both the Laureate and the calibrator; however, a person still has to position jumpers to select the various ranges.
Connect the Laureate to the calibrator and computer, double-click on the appropriate executable file (caldc4q.exe or caltc4q.exe), and follow the prompts on the computer screen. Following calibration, all calibration factors will be stored in EEPROM.