Datasheet

2
3132_0_Datasheet - May 13, 2011
Product Specifications
Mechanical
Housing Material Aluminum Alloy
Load Cell Type Strain Gauge
Capacity 780g
Dimensions 45.16x9.32x6mm
Mounting Holes M3 (Screw Size)
Cable Length 210mm
Cable Size 30 AWG (0.2mm)
Cable - no. of leads 4
Electrical
Rated Output 0.8±0.1 mv/V
Non-Linearity 0.05% FS
Hysteresis 0.05% FS
Non-Repeatability 0.05% FS
Creep (per 30 minutes) 0.1% FS
Temperature Effect on Zero (per 10°C) 0.05% FS
Temperature Effect on Span (per 10°C) 0.05% FS
Zero Balance ±1.5% FS
Input Impedance 1090±10 Ohm
Output Impedance 1000±10 Ohm
Insulation Resistance (Under 50VDC) ≥5000 MOhm
Excitation Voltage 5 VDC
Compensated Temperature Range -10 to ~+40°C
Operating Temperature Range -20 to ~+55°C
Safe Overload 120% Capacity
Ultimate Overload 150% Capacity
Calibration
A simple formula is usually used to convert the measured mv/V output from the load cell to the measured force:
Measured Force = A * Measured mV/V + B (offset)
It’s important to decide what unit your measured force is - grams, kilograms, pounds, etc.
This load cell has a rated output of 0.8±0.1mv/v which corresponds to the sensor’s capacity of 780g.
To nd A we use
Capacity = A * Rated Output
A = Capacity / Rated Output
A = 780 / 0.8
A = 975
Since the Offset is quite variable between individual load cells, it’s necessary to calculate the offset for each sensor.
Measure the output of the load cell with no force on it and note the mv/V output measured by the PhidgetBridge.
Offset = 0 - 975 * Measured Output