Describe three forms of adjusting calibration fuel meters?

1. Manual adjustment: This involves physically adjusting the calibration settings on the fuel meter using tools such as screwdrivers or knobs. This method allows for precise adjustments to be made based on the specific requirements of the fuel meter.

2. Software adjustment: Some modern fuel meters can be adjusted using software programs that allow for calibration settings to be changed electronically. This method is often more convenient and allows for adjustments to be made remotely without the need for physical access to the fuel meter.

3. Automatic adjustment: Some fuel meters are equipped with automatic calibration features that continuously monitor and adjust the calibration settings based on factors such as temperature, pressure, and flow rate. This ensures that the fuel meter remains accurate and consistent without the need for manual intervention.