
Technical Specifications
General
VT200/220 Technical Manual, Rev 1.00.01
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TM-VT200/220-EN
1 Technical
Specifications
1.1 General
CPU Characteristics
MCU 89C51RD, 64KB Flash ROM, 1KB RAM, 32KB serial EEPROM.
CPU real time clock is optional.
Communication
•
Serial port 1: RS232C Full duplex, 1200-9600 baud rate,
8 data bits/no parity
or 7 data bits/odd or even parity. Printer, weight output.
•
Serial port 2: (optional): RS232 or RS485 half duplex, 2400-57600 baud rate,
8 data bits/even or no parity or 7 data bits/even parity.
Master/slave protocol, EDP output, selectable weight output.
Display
•
VT200: 6 digit ,7 segment red LED (20mm height) display.
•
VT220: Black LCD (16mm height) display.
Annunciators
Net, No Motion, Minus sign, Zero, Range 1 and 2.
Keyboard
8-key membrane type with tactile feedback.
Approvals
EU type approval 10,000 divisions, DK 0199.62.
Accuracy class
III.
Resolution
Selectable up to 99,000 dd (in accordance with regulations).
Max tare effect
Full scale (100%).
Auto Zero track
Off or 0.5 dd, setup-selectable.
Weight digits
4, 5 or 6.
Weight steps
1, 2, 5, 10, 20, 50, 100, 200.
Digital filter
FIR automatically adjusted to conversion speed, plus post filtering (rolling
average of 1, 2, 4, 8, 16, 32 samples).
Calibration methods
Dead load, span and scale parameters via keyboard commands. Calibration can
be performed either by weighing or by entering load cell mV values.
Self diagnostics
Hardware and software – MCU watchdog.
Memory failure and I/O failure – program check.