User Manual

38 GMC-I Messtechnik GmbH
V/Hz, Ω, Temperature, and A/Hz Measurements
5.8 Current Measurement
Notes Regarding Current Measurement
• The multimeter may only be operated with installed batteries or
rechargeable batteries. Dangerous currents are otherwise not
indicated, and the instrument may be damaged.
• Set up the measuring circuit in a mechanically secure fashion,
and secure it against inadvertent breaks. Select conductor
cross-sections and lay out connections such that they do not
overheat.
• An intermittent acoustic signal (250 ms on, 250 ms off) warns
of current which exceeds 310 mA in the 300 mA range.
• The input for the current measuring range is equipped with a
fuse link. Maximum permissible voltage for the measuring
circuit (= rated voltage of the fuse) is 1000 V AC/DC.
Use specified fuses only! The fuse must have a breaking
capacity of at least 1.5 kA.
• If the fuse for the active current measuring range blows, “FUSE”
appears at the digital display, and an acoustic signal is
generated at the same time.
• If a fuse should blow, eliminate the cause of overload before
placing the instrument back into service!
• Fuse replacement is described in section 10.3.
• Be absolutely certain that the measuring ranges are not
overloaded beyond their allowable capacities. Limit values are
included in section 9, “Technical Data” in the table entitled
“Measuring Functions and Measuring Ranges” in the “Over-
load Capacity” column.
Scope of Functions, Current Measurement, Direct Connection
Scope of Functions, Current Measurement via Current Clamp Sensor
Function
mA AC / Hz ~ 300 μA
3/30/300 mA
A DC 300 μA
3/30/300 mA
400 V fuse
•
Function
Transformation Ratio
—
A AC / Hz
—
A AC+DC
—
A DC
—
Hz (A AC)
... 10 kHz