Intended use The Beckman Coulter Internal Reference Solution is a system solution intended for use with the ISE (ion-selective electrode) module of Beckman Coulter AU / Olympus AU clinical chemistry analyzers to supply the internal reference half-cell of the ISE electrode assembly. It does not measure an analyte and does not by itself produce a patient result; correct performance of the assays run on the system depends on it being loaded, primed and replaced as described in the operator's manual. Storage & shelf life Store at 15-30 C unless a different range is stated on the product label. Do not freeze. Keep containers tightly closed and protect from contamination and direct sunlight. Stable until the expiration date printed on the label; in-use / on-board stability is as stated in the package insert. COLD CHAIN: NO - ships ambient. Regulatory status System solution supplied for use with the in vitro diagnostic system identified above. It does not measure an analyte and does not by itself generate a patient result; it is required for correct operation of the assays run on the system. Refer to the current manufacturer's Instructions for Use (IFU) and Safety Data Sheet (SDS) for the complete procedure, performance characteristics, limitations, warnings and precautions.