FLIR Commercial Systems Inc. MG300 Manuale Utente

2                                                   MG300-EN V2.0   4/11 

 

Congratulations on your purchase of the MG300 True RMS MultiMeter Insulation Resistance Tester. 

This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency 

(electrical & electronic), Duty Cycle, Diode Test, Insulation Resistance, and Continuity plus 

Thermocouple Temperature. The MG300 can store and recall measurement data and features a 

waterproof, rugged design for heavy duty use. This meter can transmit data wirelessly when linked to 

a PC. Proper use and care of this meter will provide many years of reliable service. 

This symbol adjacent to another symbol, terminal or operating device indicates 

that the operator must refer to an explanation in the Operating Instructions to 

avoid personal injury or damage to the meter. 

This WARNING symbol indicates a potentially hazardous situation, which if not 

avoided, could result in death or serious injury. 

This CAUTION symbol indicates a potentially hazardous situation, which if not 

avoided, may result damage to the product. 

This symbol advises the user that the terminal(s) so marked must not be 

connected to a circuit point at which the voltage with respect to earth ground 

exceeds (in this case) 1000 VAC or VDC. 

This symbol adjacent to one or more terminals identifies them as being associated 

with ranges that may, in normal use, be subjected to particularly hazardous 

voltages. For maximum safety, the meter and its test leads should not be handled 

when these terminals are energized. 

This symbol indicates that a device is protected throughout by double insulation or 

reinforced insulation. 

Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which 
measures are taken to limit the transient overvoltages to an appropriate low level. 

Note – Examples include protected electronic circuits. 

Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from 
the fixed installation. 

Note – Examples include household, office, and laboratory appliances. 

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. 

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 

MAX 
1000V