User Manual
64 GMC-I Gossen-Metrawatt GmbH
Maintenance – Calibration
Attention!
!
Use specified fuses only! 
If fuses with other blowing characteristics, other current 
ratings or other breaking capacities are used, the operator 
is placed in danger, and protective diodes, resistors and 
other components may be damaged.
The use of repaired fuses or short-circuiting the fuse holder 
is prohibited.
Note
Testing the Fuse with the Instrument Switched On 
After inserting the fuse with the instrument switched on, the 
instrument must be switched off briefly and then switched 
back on, or briefly switched to a non-current measuring 
range and then back to the “A” measuring range.
If contact is poor or the fuse is blown, FUSE appears at the 
display.
9.4 Housing Maintenance
No special maintenance is required for the housing. Keep outside 
surfaces clean. Use a slightly dampened cloth for cleaning. Avoid 
the use of cleansers, abrasives or solvents.
9.5 Return and Environmentally Sound Disposal
The instrument is a category 9 product (monitoring and control 
instrument) in accordance with ElektroG: German electrical and 
electronic device law). This device is not subject to the RoHS 
directive.
We identify our electrical and electronic devices (as of 
August 2005) in accordance with WEEE 2002/96/EC 
and ElektroG with the symbol shown at the right per 
DIN EN 50419.
These devices may not be disposed of with the trash.
Please contact our service department regarding the return of old 
devices (see page 4).
9.6 Recalibration Service
We calibrate and recalibrate all instruments supplied by GMC-I 
Gossen-Metrawatt GmbH, as well as other manufacturers, at our 
service center, for example after one year within the framework of 
your test equipment monitoring program, as well as prior to use 
etc. (see address on page 4).










