The RKI Instruments SDM-04 Calibration Station charges, calibrates, and performs bump tests on the 04 series single gas monitor. It automatically saves bump test and calibration records which can be uploaded to a PC with a USB flash drive. The SDM-04 can connect to a PC for automated calibration, bump testing, and archiving of the 04 series data logging data for up to 10 instruments. The SDM-04 stations can be manifolded together to reduce the number of demand flow regulator gas cylinders required.