Precision Jewelry Scale for Gold 50g/0.001g Digital BalanceI. Key Feature 1. Capacity / Accuracy: 20g / 0.001g 30g / 0.001g 50g / 0.001g<br> 2. Nominal Value: 0.003g, Repeatability: 0.002g Resolution: 0.001G (Key Indicator: Objects loaded with 0.001G when the weight is more than 0.003G or more can be identified by LCD.)<br> 3. Scale size: 144x84.5x51mm<br> 4. LCD (blue backlight) size: 375x15.5mm<br> 5. Battery: 2 ** AAA (not include)<br> 6 .Low battery alarm: Lo<br> 7. Platform dimensions: 32mm diameter (stainless steel pan included)<br> II. Function buttons and instructions<br> 1.ON / OFF (power on / off) Insert the batteries into the battery room of the scale, place the scale on a solid and flat table without wind and vibration, keep the bubble in the center of the black ring. Put ON / OFF will show 88888 then 0.000, it is ready to work. Press ON / OFF to turn off the scale. If there is wind when weighing, please put the windshield down.<br> 2.UNIT (unit switch button) Press [UNIT] to switch weighing unit: g / oz / gn / ct / t / ozt Press [UNIT] key for 4 seconds, all units will turn on and drive OZ flashes, then press PCS to press and hold or close this unit, Press UNIT to select next drive, g drive cannot be closed. Press [UNIT] for 4 seconds to restore normal weighing status.<br> 3.TARE Touch [TARE] a for Re-zero.<br> 4.PCS (counting function) Select 25 pieces of samples (or 50,75,100 pieces of samples) In the normal weighing state, put the samples on the scale, then press PCS 4 seconds, and the scale shows the weight of the samples, press PCS to confirm, then LCD will display the PCS + sample value. You can put more items, the scale will show "PCS XXX", which is the quantity of items.<br> III. Calibration function Turn on the scale, press the ON / OFF key 4 seconds, the scale shows 0 then the weight value (if the capacity is 30g, 30,000 will blink), put the calibration weight of 30g on it and shows PASS, then calibration is completed. (20g calibration weight is included in the product, you can press PCS to reduce the weight value to 20g, then enter 20g weight to perform calibration), when the calibration value flashes, press UNIT to increase the value and the PCS key to decrease the value. According to the amplitude of 10G to increase or decrease, we can select the right calibration weight, the system will remember the last setting operation.<br> IV. Auto power off setting Turn off the scale, press ON / OFF for 4 seconds and show 88888 and F1-1, Press UNIT to choose the correct power on time (0 to 5), 0 = do not turn off automatically, 1-5 means the scale will turn off automatically when no operation at this time. You man choose the right moment if necessary. The scale can work normally after the setting is complete. Accessories: 1.20g pesox1 2.Tweezerx1 3.Package bagx1 4.Stainless panx1<br> V. COUTION<br> 1. This product is a precision measuring instrument. Please pay attention to operate, do not disassemble by yourself, if there is any problem, please contact the after-sales person.<br> 2. Place the scale on a solid and flat table without wind and vibration, keep the bubble in the center of the black ring<br> 3. Use the scale in windless environment, please put the windshield down in wind.<br> 4. Keep the scale out of your cell phone more than 50cm.<br> 5. Please perform calibration when the weight environment has changed, even if the temperature only changes 1 degree.<br> 6. Will display FULL when overloaded.<br> 7. Do not use the product in a humid environment. Please remove the battery and store it in a cool dry environment when not in use.<br> 8. Do not use corrosive detergents to clean the product.