Operation Manual

10 GMC-I Messtechnik GmbH

7 Current Measurement

Ð First disconnect supply power to the measuring circuit or the

load component, and discharge any capacitors which may

be present.

Ð Set the selector switch to “mA”.

After this selection has been made with the rotary switch, the

DC current mode is always active.

Ð Select the current type, either “DC” or “AC+DC”, which cor-

responds to the measured quantity by briefly pressing the

multifunction key. Double check for correct current type at

the LCD.

Ð Securely connect the instrument to the load component in

series as shown (without matching resistor).

Zero Balancing, see chapter 6.1, page 9

Current Measurement Tips:

• The instrument may not be used in power installations.

• The measuring circuit must be mechanically stable and pro-

tected against unintentional interruption. Conductor cross

sections and connection points must be substantial enough

to avoid excessive overheating.

• In the 100 mA measuring range, an intermittent acoustic sig-

nal warns you if the measurement value has exceeded the

measuring range upper limit value.

• The current ranges are protected by an internal 250 mA fus-

ible link. A defective fuse can only be replaced by GMC-I

Service GmbH service personnel.

The maximum permissible voltage for the measuring current

circuit is 600 V AC/DC in the „mA“ ranges.

–mA +

– (+) / ~

+ (–) / ~

max. 600 V !