Installation and Operation Precautionsim7520/im6020 Safety Information and Getting Started 23Installation and Operation Precautions 1Installation and Operation Precautions Chapter 11.5 Operation PrecautionsTo ensure the optimum performance of this machine, observe the precau-tions described below.Power SourceThe power source requirements are as follows.- Voltage fluctuation: Maximum ±10% (at 110 V/120-127 V/220-240 V AC)- Frequency fluctuation: Maximum ±3 Hz (at 50 Hz/60 Hz)– Use a power source with as little voltage or frequency fluctuations aspossible.Operating EnvironmentThe environmental requirements for correct operation of the machine are asfollows.- Temperature: 10°C (50°F) to 30°C (86°F) with fluctuations of no more than10°C (18°F) within an hour- Humidity: 15% to 85% with fluctuations of no more than 20% within anhourStorage of CopiesTo store copies, follow the recommendation listed below.- Copies that are to be kept for a long time should be kept where they arenot exposed to light in order to prevent them from fading.- Adhesive that contains solvent (e.g., spray glue) may dissolve the toneron copies.- Color copies have a thicker layer of toner than normal black-and-whitecopies. Therefore, when a color copy is folded, the toner at the fold maypeel off.cm2520 Safety Information and Getting Started 23