# Manual to Make the Calibration Update

## Changing the Range from 10 µA to 100 µA

This guide describes the required hardware and software changes to update the calibration range from **10 µA** to **100 µA**.

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# 1. Hardware Update

Replace the resistor values on the PCB from **2 kΩ** to **200 Ω**.

### New Resistor Part Number

- **RNCF0603TKY200R**

### Resistors to Replace

The following resistors must be changed:

- R10
- R28
- R46
- R64
- R82
- R100
- R118
- R136

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# 2. Software Update

After completing the hardware modification, update the device configuration using the provided Python script.

## Install Requirements

Run the following command to install all required Python packages:

```bash
pip install -r .\requirements.txt
```

## Upload the New Scale Values

Use the script:

```bash
MTB_UploadNewScale.py
```

### Procedure

1. Enter the device serial number.
2. Depending on your country, enter the correct meanCount value:
   - 240 for Europe
   - 250 for the USA
3. The script uploads the new configuration automatically.

## Calibration Update Complete

After the upload finishes successfully, the device is configured for the new 100 µA range.