Using the Digital Scale Pallet Truck is easy. First, make sure the batteries are installed correctly. If you're using the AC adaptor, plug it in. When you want to lift a load, position the forks under the pallet. You can weigh the load as you lift it. The scale has different increments, so choose the one that fits your load best. For calibration, use the keyboard on the scale. The truck has an automatic zero function to ensure accurate weighing. When it comes to maintenance, keep the frame clean and check the batteries regularly. Make sure the forks are in good condition and not damaged. Also, since the measurements are approximate, be aware that there might be slight variations in real - world use. Remember, the NTEP - approved models are legal for trade, so use them with confidence in commercial transactions.