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APPENDIX A: SPECIFICATIONS
ANALOG SPECIFICATIONS
Full Scale Input Signal 30mV, including dead load
Minimum Sensitivity
1.0 μV / grad
Input Impedance
30MΩ, typical
Internal Resolution Approximately 150,000 counts
Display Resolution 50,000 display division max
Measurement Rate 10 Meas/sec, nominal
System Linearity Within 0.02% of FS
Calibration Method Software Calibration, with long term storage in EEPROM
Excitation Voltage
+5 VDC, 4 x 350Ω load cells
DIGITAL SPECIFICATIONS
Microcomputer Winbond W78E58
Program Memory:
32K x 8, internal to μC
SRAM
256 x 8, internal to μC
EEPROM:
256 x 8, external to μC
Digital Filtering Software selectable
SERIAL COMMUNICATIONS
Serial Port Full Duplex, 1200, 2400, 4800, 9600 Baud
8 data bits, no parity, 1 stop bit
7 data bits, odd parity, 1 stop bit
7 data bits, even parity, 1 stop bit
7 data bits, no parity, 2 stop bits
OPERATOR INTERFACE
Display 0.75" (19 mm) 7-segment, Liquid Crystal, 6-Digit
Additional Symbols Net, Gross, Stable, Tare, lb, kg, Zero
Keyboard 5-key flat membrane panel
POWER
Rechargeable Battery 6 VDC, 3.0 Ah lead acid
AC Adapter 12 VDC, 800 mA
DC Power Consumption
55 mA + 15 mA/350Ω Load Cell
ENVIRONMENTAL
Operating Temperature
-10° to +40° C
Storage Temperature
-25° to +70° C
MECHANICAL
Overall Dimensions (with stand) 10.4” x 7.5"x 2.9” (265 mm x 191 mm x 73 mm)
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