19SPECIFICATIONSGuidance and manufacturer’s declaration - electromagnetic immunityThe table is intended for use in the electromagnetic environment specified below. The customer or theuser of the table should assure that it is used in such an environment.Immunity Test IEC 60601 test level Compliance level Electromagneticenvironment - guidanceElectrostatic discharge(ESD)IEC 61000-4-2±6 kV contact±8 kV air±6 kV contact±8 kV airFloors should be wood,concrete or ceramic tile.If floors are covered withsynthetic material, the rela-tive humidity should be atleast 30 %.Electrical fast transient/burstIEC 61000-4-4±2 kV for power supply lines±1 kV for input/output lines±2 kV for power supply lines±1 kV for input/output linesMains power quality shouldbe that of a typical com-mercial or hospital environ-ment.SurgeIEC 61000-4-5±1 kV differential mode±2 kV common mode±1 kV differential mode±2 kV common modeMains power quality shouldbe that of a typical com-mercial or hospital environ-ment.Voltage dips, short inter-ruptions and voltagevariations on power supplyinput lines IEC 61000-4-11<5 % UT(>95 % dip in UT)for 0,5 cycle40 % UT(60 % dip in UT)for 5 cycles70 % UT(30 % dip in UT)for 25 cycles<5 % UT(>95 % dip in UT)for 5 sec<5 % UT(>95 % dip in UT)for 0,5 cycle40 % UT(60 % dip in UT)for 5 cycles70 % UT(30 % dip in UT)for 25 cycles<5 % UT(>95 % dip in UT)for 5 secMains power quality shouldbe that of a typical com-mercial or hospital envi-ronment. If the user of thetable requires continuedoperation during powermains interruptions, it isrecommended that thetable be powered from anuninterruptible power sup-ply or a battery.Power frequency (50/60Hz) magnetic field IEC61000-4-83 A / m 3 A / mPower frequency magneticfields should be at levelscharacteristic of a typicallocation in a typical com-mercial or hospital environ-ment.NOTE UT is the a.c. mains voltage prior to application of the test level.