Technical data
30 Installation information 22013821A 04/06
IND4x9 / BBA4x9
7.2 Technical data of the analog scale interface
Calculation example for the differential signal
Data of the weighing cell: Sensitivity 2 mV/V, cell capacity 100 kg
Differential signal for nominal load (60 kg)
2 mV/V * 8.2 V * 60 kg/100 kg = 9.84 mV
Differential signal for half load (30 kg)
2 mV/V * 8.2 V * 30 kg/100 kg = 4.92 mV
Prerequisites for certifiable scales
• Certifiable weighing cell with SENSE cables (6 leads),
Sensitivity of the cells 2 mV/V or 3 mV/V
• Scale configured in the Service menu as certifiable
• Labelling in accordance with regulations by the plant engineer, if the complete
scale was not supplied by METTLER TOLEDO
Analog scale interface
Resolution 300,000 points for non-certifiable applications
7,500 points for certifiable applications
Weighing ranges Up to 3 weighing ranges can be defined in the menu, incl. shiftable or fixed fine
ranges.
In the case of certifiable/certified applications the minimum voltage per calibration
value (0.5 µV/e) has to be ensured or 7,500 e may not be exceeded.
Calibration Basic calibration and calibration during linearization
Zero setting range (key) 2 % of the defined max. useable load, cannot be modified
Autozero range 2 % of the defined max. useable load, cannot be modified
Activation zero-set
range
–2 % ... 18 % or –2 % ... 2 % referenced to the defined max. useable load
can be selected in the menu
Linearity 0.01 % of the defined max. useable load
Units g, kg, oz, lb, t
Numerical steps
n
1, 2, 5 x 10n, can be selected in the menu
Cell power supply 8.2 V
Requirements for the weighing cell
Nominal load 0.1 ... 999,999.9 (g, kg, lb, oz, t)
Permissible impedance ≥ 80 Ω
Differential signal –1 mV ... 25 mV (see the following calculation example)