22 67XXU USB/Serial Scale Service Manual
3.7 Communication
3.8 Analog Circuitry
l 24-bit A/D converter
l Conversion Speed: 10Hz
l Input range: -15mV to +15mV
l Output code:1mV input will output about 100,000 raw counts
l Hardware low pass filter and 2 programmable digital low pass filters
3.9 Capacity and Division
l Programmable
l Max display range: -199,999 to 199,999
l Division number range for primary unit: 100-20,000
m Division number range for second unit: 100-25,000 (division number will
be limited by REGUL setting)
l Recommended Sensitivity: >1µV/ display division
3.10 Accuracy
≤0.01%
3.11 Calibration Method
l Software calibration with long-term storage in EEPROM
l Provides smooth curve fit through four points
l Calibration can be done under kg or lb weight unit with 10% -100%FS
standard weight.
l Weight fine adjustment (± 10%)
l Geographic adjustment
Serial port1 Full-duplex RS-232
Optional Serial Port USB (Virtual RS-232)
Baud Rate Selectable: 1200-2400-4800-9600-19200-38400 bps
Data Output Format 8N1, 7O1, 7E1
Protocol programmable
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