Datasheet

2
3136_0_Datasheet - May 13, 2011
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. The specication is in
kilgorams, but you can generate the formula for whatever unit of measure you need.
The Certicate that is included with your load cell will specify an exact rated output. As an example, assume the
rated output is 1.0791, corresponding to the capacity of 50kg.
To nd A we use
Capacity = A * Rated Output
A = Capacity / Rated Output
A = 50 / 1.0791
A = 45.155
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 - 46.335 * Measured Output
Product Specifications
Mechanical
Housing Material Aluminum Alloy & Alloy Steel
Load Cell Type Button
Capacity 50kg
Dimensions 25x11mm
Mounting Holes M3 (Screw Size)
Cable Length 550mm
Cable Size 30 AWG (0.2mm)
Cable - no. of leads 5
Electrical
Precision 0.2% FS
Rated Output See Certicate
Non-Linearity See Certicate
Hysteresis See Certicate
Non-Repeatability See Certicate
Creep (per 30 minutes) See Certicate
Temperature Effect on Zero (per 10°C) See Certicate
Temperature Effect on Span (per 10°C) See Certicate
Zero Balance ±1 FS
Input Impedance 350±5 Ohm
Output Impedance 350±5 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