8
Chapter 1 - Notes on Safety, Usage, Maintenance and Service
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1.2
Usage notes
The guarantee for a new instrument ends 24 months after delivery.
The guarantee is invalidated if the instrument is opened!
Sharp tools (such as screwdrivers) can damage the plastic pane in front of the TFT display and
thus ruin the TFT.
The contrast of the TFT deteriorates at ambient temperatures below 5
°
C.
The TFT display does not reach maximum brightness until several seconds after the instrument is
cold-started.
The instrument reaches full measurement accuracy after about 5 minutes of operation.
Wireless DECT telephones and GSM mobile phones can cause malfunctions and incorrect
measurements if they are operated in the immediate vicinity of the measuring receiver.
1.3
Maintenance
The instrument is maintenance-free.
1.4
Cleaning
Clean the case and the TFT display with a soft, lint-free dust cloth. Never use solvents such as
diluents for cellulose lacquers, acetone or similar, since they may damage plastic parts or the
coating on the front panel.
Remove dust from the ventilation slots regularly so that the air circulation provided by the
integrated ventilator is not obstructed.
1.5
Calibration
The instrument should be recalibrated at least every two years. The instrument is automatically
calibrated at the factory if returned for service.
1.6
Service
Service address: see back cover of operating manual.
