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Product parameters: Max Measure Weight: 300 g Min Measure Weight: 20 mg Accuracy: 0.001g Repeatability Error:±0.002 g Non-linear Error: ±0.002 g Setting Time: ≤3 seconds Working Temperature: 5℃~40℃ Scale pan size: φ 90mm Weighing Range: 0.001g-300g AC/DC power supply, AC/DC (110v/9v batter) Package List 1 x scale 1 x power cable 1 x 100 g calibration weight 1 x manual Counting function 1.Put 10 samples onto the scale pan, press and hold PCS key it go into counting mode. 2.Press TARE key to choose sample proportion(10). Press ON/OFF key to confirm. 3.Put the product to be counted on the scale pan, then it will display the counting result. 4.Press TARE key to quit the counting mode. Use notes 1 scale is a precision instrument, please refer to the level before the use of the instrument to adjust its horizontal position. 2 do not exceed the maximum weighing range, if the load is too heavy, will destroy the product. 3 please use it under the common room temperature, don't put it in a cold or overheated environment. 4 please put the product in a clean environment, dust, dirt, moisture, vibration, air flow, as well as in the vicinity of electrical appliances will affect the accuracy of the product. 5 avoid violent shaking, landing or shock products, to ensure the accuracy of the product. 6 Do not use the product immediately after receiving the product. It is recommended to re-calibrate after 1 hour of warm-up. After the product is turned on, put the weight on the weighing pan and start preheating for 1 hour.