
IM CL250 iii
WARNING
Toavoiddamagetotheinstrumentorelectricshock!
Therestrictionsonthe maximum voltagelevelforwhichthe CL250 testers
canbeused,dependontheMeasurementcategoriesspecifiedbythesafety
standards.Thesecategoryspecificationsareformulatedtoprotectoperators
againsttransientimpulsevoltagesinpowerlines.
Function
MaximumAllowableInput
MEASUREMENT
CATEGORYⅢ
MEASUREMENT
CATEGORYⅣ
A, A
AC2000Arms
Measuringcircuitvoltage:
AC750Vrms
DC1000V
AC2000Arms
Measuringcircuitvoltage:
AC600Vrms
DC600V
V, V AC750Vrms/DC1000V
AC600Vrms/DC600V
Input terminal-to-
groundvoltage AC750Vrms/DC1000V
O(None,Other)
OthercircuitsthatarenotdirectlyconnectedtoMEAINS.
MeasurementcategoryII(CAT.II)
Local level, appliance, portable equipment etc., with smaller transient
measurementthanCAT.III.
MeasurementcategoryIII(CAT.III):
Distribution level, fixed installation, with smaller transient measurement
thanCAT.IV.
MeasurementcategoryⅣ(CAT. Ⅳ ):
Primarysupplylevel,overheadlines,cablesystems,andon.
CAUTION
● Alwaysmakesuretoinserteachplugofthetestleadsfullyintotheappro-
priateterminalontheinstrument.
● Make sure to remove the test leads from the instrument before making
currentmeasurement.
● Be sure to set the Function Selector switch to the "OFF" position after
use.Whentheinstrumentwillnotbeinuseforalongperiodoftime,place
itinstorageafterremovingthebattery.
● Use a dampclothanddetergentfor cleaning theinstrument.Donotuse
abrasivesorsolvents..
NOTE
●Radiation immunity affects the accuracy of CL250 testers under the
conditionsspecifiedinEN61000-4-.
●If equipment generating strong electromagnetic interference is located
nearly,thetestersmaymalfunction.