Instrument through RS - 232 interface to ASCII mode to send the measurement data, a data type of floating point Numbers, each floating point number is composed of continuous send 5 bytes, floating point Numbers using scientific notation, the definition of a decimal point after the first BCD code, in the structure of 5 bytes, 4 bytes before the mantissa, after a byte order code, order code is highest one operator (" 0 "represents a positive number," 1 "represents a negative number), is high order, low six exponent values, range of 0-63 - h,

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