Laurel Electronics LAUREATE SERIES 2 DIGITAL PANEL METER User Manual
Page 54
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22. METER CALIBRATION
All analog input and analog output ranges of the meter have been digitally calibrated at the
factory prior to shipment using calibration equipment certified to NIST standards. Calibration
constants are stored digitally in non-volatile memory in EEPROM on the signal conditioner
board and analog output board. As a result, these boards may be mixed and interchanged
without requiring meter recalibration. Digital calibration eliminates much of circuitry that would
be associated with analog calibration, providing superior long term accuracy and stability.
If recalibration is required, the meter may be returned to the factory or to any authorized
distributor. Easy calibration of DC, AC and load cell signal conditioner ranges is possible using
the Instrument Setup software, as described in Section 20. To allow computer aided calibra-
tion, an RS232 or RS485 interface card must be installed in the meter. This card may be
installed temporarily and be removed following calibration. Step-by-step instructions and
advanced calibration software are available from the factory.
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