How do I accurately calibrate my digital scale that is a manlloro 200g made in China

Yes, you can calibrate the CAMRY Electronic Personal Scale EB9872 by following these steps:

1. Step on the scale and wait for the display to show "0.0".
2. Press and hold the "UNIT" button for approximately 5 seconds until the display shows "CAL" and "0.0" starts flashing.
3. Release the "UNIT" button and wait for the display to show "1000" and start flashing.
4. Place a weight of exactly 1000g on the scale and wait for the display to stabilize and show a reading.
5. Press the "UNIT" button again to confirm the calibration. The display will show "PASS" and then return to "0.0".
6. Remove the weight from the scale and it is now calibrated and ready for use.

It's important to note that you should use a weight that is known to be accurate, such as a calibration weight, to ensure accurate calibration. Also, it's recommended to calibrate the scale periodically to ensure accurate readings.

Are these a vintage or a digital scales? Is this for general cooking and baking or is it for accurate measuring?
General cooking doesn't need serious accuracy so unless it is seriously inaccurate I wouldn't worry too much about it.
Digital scales can be difficult to accurately calibrate without specialist equipment. For accurate measuring there are companies out there that can calibrate scales to an industrial standard for a fee.
You can check the accuracy of any scale buy using something you know the EXACT weight of. (Bag of sugar or flour). Set up the scales as normal. Add the known weight and read the scale. If it is more than a gram or two out it needs calibrating. On digital scales you might need to press the 'TARE' button before you start to Zero the display.
Most old 'mechanical' scales use a spring as the resistance to the weight you put onto the scale. You can get some adjustment but as the spring gets old it weakens and gets less accurate. Somewhere on the scale there will be an adjuster wheel. Often positioned high up on the back of the scales. *Note* mechanical scales are often not very exact so there will always be some level of inaccuracy.
Set the scales up as you would normally use them. Look at where the needle sits near the '0' mark. Turn the adjuster wheel a few turns, (counting them), in one direction. Press the weight 'Plunger' all the way down two or three times. Check where the needle has moved to. If it has moved the 'wrong' direction wind the adjuster wheel back the number of turns you counted, (the start position), then continue in that direction the same number of turns. Press the plunger down like you did the first time.
This method will show you which way to turn the adjuster and how far to get it back to where the '0' mark is.

Mostly only a certified weight will weigh exactly 1kg and most other goods purporting to weigh 1kg will actually weigh that amount plus or minus a tolerance, depending on the goods.

The suitability of something to calibrate a scale with will depend entirely on how accurate the calibration is to be. I think 1 litre of water at room temperature weighs 1kg but I suggest you take advice about that.

Special Calibration- If the display shows [OUE2] after turning on: 1. Turn OFF the scale. 2. Press ON/OFF key briefly then immediatley press and hold the MODE and TARE buttons simultaneously until [CAL] is displayed. Release the MODE and TARE buttons and a random internal statement number will be displayed. 3. Press the MODE key once and the display will show [2Ero]. 4. Place a 200g weight on the center of the platform. Wait 2 seconds then press MODE key again. The LCD will display [PASS] then [200.0]. 5. Remove the weight and turn off the scale. Special Calibration is complete.

When you see( 0UE2 )error message on your scale display after turning on , the following method is used for restore your precious balance. This method is called Special Calibration-
1. Turn OFF the scale.
2. Press ON/OFF key briefly then immediatley press and hold the MODE and TARE buttons simultaneously until [CAL] is displayed. Release the MODE and TARE buttons and a random internal statement number will be displayed.
3. Press the MODE key once and the display will show [2Ero].
4. Place a 200g weight on the center of the platform. Wait 2 seconds then press MODE key again. The LCD will display [PASS] then [200.0]. 5. Remove the weight and turn off the scale.
Special Calibration is complete.

With best regards

HUK
CIGTL-Pak gemological Lab

I thinkn there is a reset button to press with no weight on the scale if I remember correctly. Might have to calibrate with the test weight too if the calibration is messed up (not likely though).

500ml 0f water is exactly 500g, measure that volume and put it in freezer bag and use as calibration weight, or if you have friend with scales - borrow from him scale weights.

if you use water - accuracy of the scale will not be absolute, it may vary few g either way.

another way - go to shop and buy 500g block of butter - put it on the scale in the shop - remove or add as you need till you have exact 500g, shop scales are accurate on that weight within 2g

do not forget to vote if you find this answer useful...

Calibrating a digital pocket scale like the Mega Weigh MGP-1014 ensures that it provides accurate measurements. Here are the general steps for calibrating such a scale:
Note: It's important to refer to your scale's user manual for specific instructions, as calibration methods can vary between different models.
What You'll Need:

• Calibration weights (these are weights with known, precise values)
• The Mega Weigh MGP-1014 scale
• A clean, stable surface for calibration

Steps:

1. Read the Manual: Familiarize yourself with the user manual that came with the scale. It should provide specific instructions on how to calibrate the scale.
2. Clean the Scale: Ensure that the scale's weighing platform is clean and free from any debris. This helps to prevent interference with the calibration process.
3. Power On: Turn on the scale and wait for it to stabilize, displaying "0.0" or the default reading.
4. Tare (Optional): If your scale has a tare function, you can use it to zero out the weight of any container you plan to use to hold the calibration weights. Place the empty container on the scale and press the tare button.
5. Select Calibration Mode: Many scales have a calibration mode that you need to access. Refer to your user manual to determine how to enter the calibration mode on the Mega Weigh MGP-1014.
6. Add Calibration Weight: Place a calibration weight of a known value onto the scale's platform. The weight should match the unit of measurement you plan to use (grams, ounces, etc.).
7. Calibration Procedure: Follow the specific instructions provided in the user manual to initiate the calibration procedure. This usually involves pressing buttons or following on-screen prompts. The scale will often ask you to confirm the weight value of the calibration weight you added.
8. Confirm or Adjust: The scale should display the weight you added as the calibration weight. Confirm that the displayed weight matches the known value of the calibration weight. If there's a discrepancy, follow the manual's instructions to adjust the calibration setting accordingly.
9. Repeat if Necessary: Some scales require calibration with multiple weights to ensure accuracy across the scale's entire range. If this is the case, follow the manual's instructions for using additional calibration weights.
10. Exit Calibration Mode: Once you've completed the calibration procedure, exit the calibration mode according to the instructions provided in the user manual.
11. Test with Known Items: After calibration, test the scale's accuracy by weighing objects of known weight to ensure that it's providing accurate readings.

Remember that the exact calibration process can vary depending on the scale model, so always refer to the user manual for the most accurate instructions. If you're unsure about any step, it's recommended to contact the manufacturer's customer support for assistance.

Very few electronic scales are accurate as they are a function of a resistance measured against a voltage. They may be accurate when you buy them, but over time the electronic components decay and read differently as the components are cheap 10% type resistors and capacitors and cannot hold their specific values over time.
If you want accuracy, you will have to get a balance type scale that can be calibrated on site.