There are 2 easy ways to use a calibration gas as a reference:
- You can supply the gas to the GMP231 using the calibration adapter accessory. Gas flow should be in the range 0.5 … 1.1 l/min, recommendation is 1 l/min. Allow the measurement to stabilize for three minutes before starting the calibration.
- You can fill the entire incubator with the calibration gas.
To perform a 2-point adjustment, you need 2 calibration gases: one that is below 2 %CO2 (low-end reference) and one that is above 2 %CO2 (high-end reference).
When supplying the gas from a gas bottle, make sure the gas bottle has stabilized to room temperature before starting.