Manual

Gossen Metrawatt GmbH 97
21 Maintenance
21.1 Test Instrument Firmware/Software
The layout of the test instruments makes it possible to adapt
device software to the latest standards and regulations. Beyond
this, suggestions from customers result in continuous improve-
ment of the test instrument software, as well as new functions.
Query Current Status
➭ Turn the rotary switch to the SETUP position.
➭ Press the SW-Info CALIBRATION key.
➭ Press any key in order to return to the main menu.
Update
Internal test instrument firmware/software can be updated via the
USB port with the help of a PC and an interface cable.
The firmware/software with the required version is transferred to
the test instrument with the help of the MASTER Updater Soft-
ware-Tool. Currently installed test instrument firmware/software is
overwritten.
The MASTER Updater can be downloaded free of charge from
www.gossenmetrawatt.com. Registration with myGMC is
required to this end. Operating instructions for the Firmware
Update Tool are available here as well.
Note
Prerequisite for transfer:
The rotary selector switch is not set to the U position.
➭ Establish a USB connection between the PC and the test in-
strument.
➭ Switch the PC and the test instrument on.
➭ Follow the instructions displayed by the MASTER Updater and
the associated operating instructions.
21.1.1 Rechargeable Battery Care
Check to make sure that no leakage has occurred at the
rechargeable batteries at short, regular intervals, or after the
instrument has been in storage for a lengthy period of time.
Note
Remove rechargeable batteries during lengthy periods of
non-use (e.g. vacation). This prevents excessive deple-
tion or leakage, which may result in damage to the test
instrument.
21.2 Fuse Replacement
If a fuse has blown due to overloading, a corresponding message
error appears at the display panel. The instrument’s voltage mea-
suring ranges are nevertheless still functional.
➭ Disconnect the device from the measuring circuit at all poles!
➭ Loosen the slotted screws at the fuse compartment lid next to
the mains power cable with a screwdriver. The fuses are now
accessible.
➭ Replacement fuses can be accessed after opening the battery
compartment lid.
Attention!
!
Severe damage to the instrument may occur if incorrect
fuses are used.
Only original fuses from Gossen Metrawatt GmbH may
be used (order no. 3-578-285-01 / SIBA 7012540.3.15
SI-EINSATZ FF 3.15/500 6.3X32).
Only original fuses assure required protection by means
of suitable blowing characteristics. Short-circuiting of
fuse terminals or the repair of fuses is prohibited, and is
life endangering!
The instrument may be damaged if fuses with incorrect
ampere ratings, breaking capacities or blowing charac-
teristics are used!
➭ Remove the blown fuse and insert a new one.
➭ Insert the fuse compartment lid after the fuse has been re-
placed and secure it by turning clockwise.
21.3 Housing
No special maintenance is required for the housing.
Keep outside surfaces clean. Use a slightly dampened cloth for
cleaning. In particular for the protective rubber surfaces, we rec-
ommend a moist, lint-free microfiber cloth. Avoid the use of
cleansers, abrasives or solvents.
21.4 Calibration
Use of your instrument and resultant stressing influence the
instrument and lead to deviation from warranted accuracy values.
In the case of strict measuring accuracy requirements, as well as
in the event of severe stressing (e.g. severe climatic or mechanical
stress), we recommend a relatively short calibration interval of
once per year. If this is not the case, a calibration interval of 2 to 3
years is usually adequate.
Please contact GMC-I Service GmbH for calibration services (see
section 22, “Contact, Support and Service”, on page 98).
A sticker with an instrument-specific guideline value for the cali-
bration interval and information regarding the service provider is
included on the instrument as an aid.
Note
Date on Calibration Certificate / Calibration Interval Begins Upon
Receipt
Your instrument is furnished with a calibration certificate
on which a date appears. This date may be further in the
past if your instrument has been stored for some time
prior to sale.
The instruments are stored in accordance with the spec-
ified conditions. Drift is thus negligible for a duration of
1 year. Longer storage periods are highly unusual.
Consequently, the instrument’s characteristic values lie
within the specifications and the first calibration interval
can be determined as of the date of receipt.