What is the limit error of fuel dispensing pump on delivery of 5litres and 20litre on measuring can?

The limit error of a fuel dispensing pump is typically regulated by government authorities and is usually set at +/- 0.5% of the volume delivered.

For a delivery of 5 litres, the limit error would be 5 litres x 0.5% = 0.025 litres

For a delivery of 20 litres, the limit error would be 20 litres x 0.5% = 0.1 litres

Therefore, the limit error for a delivery of 5 litres would be 0.025 litres and for a delivery of 20 litres would be 0.1 litres.

Limit Error:

The limit error of a fuel dispensing pump is the maximum permissible error in the delivered volume of fuel. It is usually expressed as a percentage of the nominal delivered volume.

Verification Procedure:

To verify the limit error, two measuring cans with known volumes are used.

- 5-liter can: Used to measure the delivered volume at 5 liters.
- 20-liter can: Used to measure the delivered volume at 20 liters.

Steps:

1. Ensure that the pump is calibrated and the measuring cans are clean and accurate.
2. Reset the pump to zero.
3. Dispense 5 liters of fuel into the 5-liter can.
4. Compare the actual delivered volume to the nominal volume (5 liters). Calculate the error as follows:

```
Error = (Actual Delivered Volume - Nominal Volume) / Nominal Volume
```

5. Repeat steps 3-4 for dispensing 20 liters of fuel into the 20-liter can.

Acceptance Criteria:

- The limit error should not exceed the following limits:
- 5-liter can: +/- 0.5%
- 20-liter can: +/- 0.25%

Example Calculation:

Let's say the actual delivered volume of fuel at 5 liters is 4.97 liters. The error is calculated as:

```
Error = (4.97 liters - 5 liters) / 5 liters
Error = -0.06%
```

Since the error is within the limit (-0.5%), the pump meets the accuracy requirements.