MethaMeasure requires a two-point calibration every 3 to 6 months, depending on H₂S concentration. High H₂S (>500 ppm) accelerates zero drift.
Tools required: Zero gas (N₂), Span gas (certified mixture), 2 L/min regulator, 30cm of spare tubing.
MethaMeasure is a hypothetical precision measurement app/device for capturing, storing, and analyzing physical measurements (length, mass, temperature, etc.). This guide covers setup, workflows, features, best practices, troubleshooting, and example use cases to help users get accurate, repeatable results. methameasure user guide
For automated data logging, use the RS485 serial connection. Below is the standard register map for MethaMeasure (Firmware v2.0+):
| Parameter | Register Address (Decimal) | Data Type | Scaling | Unit | | :--- | :--- | :--- | :--- | :--- | | Methane (CH₄) | 40001 | 16-bit uint | Divide by 10 | % | | Carbon Dioxide (CO₂) | 40002 | 16-bit uint | Divide by 10 | % | | H₂S (Hydrogen Sulfide) | 40003 | 16-bit uint | Raw value | ppm | | Flow Status | 40010 | Bitmask | 0=OK, 1=Alert | N/A | | Sensor Temperature | 40015 | 16-bit int | Divide by 10 | °C | MethaMeasure requires a two-point calibration every 3 to
Example: A reading of 652 on register 40001 equals 65.2% CH₄.
Polling rate: Do not poll faster than once every 5 seconds. The internal CPU prioritizes gas analysis over comms. Once the report is generated, look for these
Once the report is generated, look for these indicators of data health: