User Manual

42 GMC-I Messtechnik GmbH
V/Hz, , Temperature, and A/Hz Measurements
5.7 Current Measurement
Notes Regarding Current Measurement
• The multimeter may only be operated with installed batteries or re-
chargeable 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-sec-
tions and lay out connections such that they do not overheat.
• An intermittent acoustic signal warns of current greater than 10 A.
An continuous acoustic signal warns of current greater than 16 A .
• When measuring high current values, limit them to max. 16 A for
30 seconds or 10 A for max. 5 minutes, and allow the multimeter
to cool down for 10 minutes between measurements.
• For purposes of orientation, internal temperature in close prox-
imity to the jacks is displayed at the right-hand auxiliary display
in the 3 A and 10 A or 16 A ranges. If temperature rises to
above 50° C, you are warned by an intermittent acoustic sig-
nal.
• The input for the current measuring range is equipped with a
fuse link. Maximum permissible voltage for the measuring cir-
cuit (= rated voltage of the fuse) is 600 V AC/DC. Use specified
fuses only! The fuse must have a breaking capacity of at least
30 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 9.3.
• Be absolutely certain that the measuring ranges are not over-
loaded beyond their allowable capacities. Limit values are in-
cluded in section 8, “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 with Current Clamp Sensor
Scope of Functions, Current Measurement with Current Clamp Transformer
Function Switch Position Measuring Range
Transformation ratio SEt menu, CliP=OFF
A DC A
300 A
3 / 30 / 300 mA
3 / 10 A (16 A)
A AC+DC TRMS / Hz (A AC) A
A AC / Hz (A AC) ~ A~
Hz (A AC+DC) /
A AC+DC TRMS A
Up to 30 kHz
Hz (A AC) / A AC ~ Hz
Function Switch Position
Transformation ratio SEt menu, CliPOFF
A DC V
A AC+DC / Hz (A AC) V
Hz (A AC) / A AC+DC Hz
A AC / Hz (A AC) V~
Hz (A AC) / A AC Hz
Function Switch Position
Transformation Ratio SEt menu, CliPOFF
A DC A
A AC+DC / Hz (A AC) A
Hz (A AC) / A AC+DC A
A AC / Hz (A AC) A~
Hz (A AC) / A AC Hz