Mindray DP-9900 - Protective Earth and Leakage Current Tests

Electrical Safety Inspection
A-5
ELECTRICAL SAFETY INSPECTION
4- Protective Earth Resistance
VOERVIEW
Protective Earth Resistance is measured using the RED test lead attached to the DUT
Protective Earth terminal or enclosure. Select the test current by pressingSOFT KEY 3 to toggle
between1AMP,10AMP,and25AMP.Thefrontpaneloutletpoweristurnedoffforthistest.
Thefollowingconditionsapply:L1
andL2Open.
TEST PROCEDURE
 Prepare
1) FirstselectthetestcurrentthatwillbeusedforperformingtheProtectiveEarthResistance
testbypressingAMPERES(SOFTKEY3).
2) Connectthetestlead(s)betweentheREDinputjackandtheGREENinputjack.
3) PressCALLEADS.The601PROwillmeasuretheleadresistance,andif
lessthan0.150Ohms,
it will store the reading and subtract it from all earth resistance readings taken at the
calibratedcurrent.

4) Ifthecalibrationfails,thepreviouslystoredreadingswillbeuseduntilapassingcalibration 
hasoccurred.
 WARNING
During Earth Resistance testing, the DUT must be plugged intothe 601PRO front outlet. If
theDUTfailsEarthResistance,discontinuetestsandlabelthedevicedefective.
 Perform the Test
1) FromtheMAINMENU,orwiththe outletunpowered,plugthe DUTintothe601PROfront
paneloutlet.
2) Attach the 601PRO RED input leadto the device’s Protective Earth terminal or an exposed
metalarea.