There is no pre-use preparation in the field. Simply insert the cartridges to their housing structures and supply electricity to immediately begin calibrations. The cartridges should only be kept in their containers after your calibration session is finished in order to preserve their efficiency for the following use. The user does not need to take any safety measures on the ground since there is no risk of flooding the circuit with no need to empty it after usage when there is no water around. Additionally, it has unmatched toughness thanks to its portable humidity calibration test equipment, and a comfortable storage box safeguards it throughout transportation.