| Level | Code | Display | Definition | 
 | 1 | AMB  | Ambient Temperature | 
                        Keep at ambient temperature, 22 +/- 2C 
                      | 
 | 1 | C37  | Body Temperature | 
                        Critical to keep at body temperature 36-38C 
                      | 
 | 1 | CAMB  | Critical Ambient temperature | 
                        Critical ambient - must not be refrigerated or frozen. 
                      | 
 | 1 | CATM  | Protect from Air | 
                        Critical. Do not expose to atmosphere.  Do not uncap. 
                      | 
 | 1 | CFRZ  | Critical frozen | 
                        Critical frozen. Specimen must not be allowed to thaw until immediately prior to testing. 
                      | 
 | 1 | CREF  | Critical refrigerated temperature | 
                        Critical refrigerated - must not be allowed to freeze or warm until imediately prior to testing. 
                      | 
 | 1 | DFRZ  | Deep Frozen | 
                        Deep Frozen -16 to -20C. 
                      | 
 | 1 | DRY  | dry | 
                        Keep in a dry environment 
                      | 
 | 1 | FRZ  | frozen | 
                        Keep frozen below 0 ?C 
                      | 
 | 1 | MTLF  | Metal Free | 
                        Container is free of heavy metals, including lead. 
                      | 
 | 1 | NTR  | nitrogen | 
                        Keep in liquid nitrogen 
                      | 
 | 1 | PRTL  | Protect from Light | 
                        Protect from light (eg. Wrap in aluminum foil). 
                      | 
 | 1 | PSA  | do not shake | 
                        Do not shake 
                      | 
 | 1 | PSO  | no shock | 
                        Protect against shock 
                      | 
 | 1 | REF  | Refrigerated temperature | 
                        Keep at refrigerated temperature:4-8C Accidental warming or freezing is of little consequence. 
                      | 
 | 1 | SBU  | Shake before use | 
                        Shake thoroughly before using 
                      | 
 | 1 | UFRZ  | Ultra frozen | 
                        Ultra cold frozen -75 to -85C.  Ultra cold freezer is typically at temperature of dry ice. 
                      | 
 | 1 | UPR  | upright | 
                        Keep upright, do not turn upside down 
                      |