Metrel MD 9040 Digital-Multimeter, DMM, 20991440 Datenbogen

 

4 

 
Terms in this manual 
WARNING   identifies conditions and actions that could result in serious injury or even 

death to the user. 

identifies conditions and actions that could cause damage or malfunction 
in the instrument. 

 
This 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 is intended only for indoor use. 
 
The meter protection rating, against the users, is double insulation per IEC61010-1 2nd 
Ed., EN61010-1 2nd Ed., UL61010-1 2nd Ed. and CAN/CSA C22.2 No. 61010.1-0.92 to 
Category IV 1000 Volts AC & DC. 
 
MD 9040 & MD 9050 Terminals (to COM) measurement category: 

V : 

Category IV 1000 Volts AC & DC 

mA

A : 

Category IV 600 Volts AC and 300 Volts DC 

A : 

Category IV 600 Volts AC and 300 Volts DC 

 
Per IEC61010-1 2nd Ed. (2001) Measurement Category 
Measurement Category IV (CAT IV)

 is for measurements performed at the source of 

the low-voltage installation. Examples are electricity meters and measurements on 
primary overcurrent protection devices and ripple control units. 
 
 
Measurement Category III (CAT III)

 is for measurements performed in the building 

installation. Examples are measurements on distribution boards, circuit- breakers, wiring, 
including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed 
installation, and equipment for industrial use and some other equipment, for example, 
stationary motors with permanent connection to the fixed installation. 
 
 
Measurement Category II (CAT II)

 is for measurements performed on circuits directly 

connected to the low voltage installation. Examples are measurements on household 
appliances, portable tools and similar equipment.