Using a calibration gas as reference - GMP231

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.