Metrel MD 9250 Digital-Multimeter, DMM, 20991937 Hoja De Datos

4 

 
MaintenanceThis manual contains information and warnings that must be followed for 
operating the instrument safely and maintaining the instrument in a safe operating 
condition. If the instrument is used in a manner not specified by the manufacturer, the 
protection provided by the instrument may be impaired.  
 
The meter protection rating, against the users, is double insulation per IEC/EN61010-1 
2nd Ed., UL61010-1 2nd Ed., CAN/CSA C22.2 No. 61010.1-0.92, IEC/EN61010-2-032, 
UL61010B-2-032, CAN/CSA C22.2 No. 61010-2-032-04 & IEC/EN61010-
031:2002/A1:2008:  
 
Measurement Category IV 1000V AC & DC. 
 
PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY 
 
OVERVOLTAGE CATEGORY II 
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be 
supplied from the fixed installation. 
Note – Examples include household, office, and laboratory appliances. 
 
OVERVOLTAGE CATEGORY III 
Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations. 
Note – Examples include switches in the fixed installation and some equipment for 
industrial use with permanent connection to the fixed installation. 
 
OVERVOLTAGE CATEGORY IV

Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. 
Note – Examples include electricity meters and primary over-current protection 
equipment. 
 
TERMS IN THIS MANUAL 
WARNING

  identifies conditions and actions that could result in serious injury or even 

death to the user. 
 
CAUTION 

identifies conditions and actions that could cause damage or malfunction in 

the instrument. 
 
WARNING

  

To reduce the risk of fire or electric shock, do not expose this product to rain or moisture. 
The meter is intended only for indoor use. 
 
To avoid electrical shock hazard, observe the proper safety precautions when working 
with voltages above 60 VDC or 30 VAC rms. These voltage levels pose a potential 
shock hazard to the user.  
 
Keep your hands/fingers behind the hand/finger barriers (of the meter and the test leads) 
that indicate the limits of safe access of the hand-held part during measurement. 
Inspect test leads, connectors, and probes for damaged insulation or exposed metal 
before using the instrument. If any defects are found, replace them immediately.