Measure cycles Running average of measurement displayed after each cycle. Automatic cycle stops when reading errors fall below user set limit or user set max cycles are done. Cycle time Basic measure time is 1.2, 3.6, 7.2 or 14.4 s as selected by user via keyboard. Autoranging and commutation adds about 1.4 s Signal processing Continuous averaging after each complete cycle. Noise errors calculated and displayed as percentage of reading.
Resistivity is calculated using user entered electrode distances.
Field measurement accuracy depends on ground noise and resistivity. Instrument will calculate and display running estimate of measuring accuracy. System calibration Calibration is done digitally by the microprocessor based on correction values stored in memory. The correction values are found in final production testing and are also established during later periodical recommended yearly checks at authorized service centers. Data storage Full resolution reading average and error are stored along with user entered coordinates and time of day for each measurement.