ENGLISH
The code 51251 is a battery-powered, true RMS insulation multimeter (hereafter "the Meter") with
6000 count display.
THE METER MEASURES OR TESTS THE FOLLOWING:
• AC/DC voltage and current
• Resistance
• Voltage and current frequency
• Diode
• Continuity
• Capacitance
• Temperature
• Insulation Testing
This Meter meets CAT III 1000V and CAT IV 600V IEC61010 standards: in pollution degree 2
and double injection.
CAT III: Distribution level, fixed installation, with smaller transient overvoltages than CAT IV.
CAT IV: Primary supply level, overhead lines, cable systems etc.
Use the Meter only as specified in this users manual. Otherwise protection provided by the Meter
may be impaired. See Table 1 for a list of symbols used on the Meter and in this manual.
Warning identifies hazardous conditions and actions that could cause bodily harm or death.
Caution identifies conditions and actions that could damage the Meter, the equipment under test,
or cause permanent loss of data.
Warning
To avoid possible electric shock or personal inquiry, follow these guidelines:
• Use the Meter only as specified in this manual or the protection provided by the Meter
might be impaired.
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INSULATION RESISTANCE MULTIMETERS
INTRODUCTION
SAFETY INFORMATION