User manual

34
Troubleshooting
By purchasing the digital thermometer 306, you now have a product designed accor-
ding to the state of the art.
Nevertheless, problems or trouble are not excluded. Thus, the following text descri-
bes the methods you can use to eliminate some of this trouble on your own; please
make sure to observe the safety provisions!
Errors Possible cause
no transmission Safe contact of connection line?
to PC Software loaded according to instructions?
PC interface OK?
No indication when Is the battery discharged?
device is switched on Did the measuring device switch off automatically after
being out of operation for 30 minutes?
Maintenance and calibration
You should calibrate the thermometer annually in order to ensure the accuracy of the
thermometers for a long period of time.
The adjustable capacitor "CAL” can be used to calibrate the measuring device. Use a
Philip’s screwdriver of a suitable size. Turn it carefully to the left and to the right during
the measurement, until the display shows the exact value of the reference device.
The battery exchange is described under "Handling, commissioning A”.
Use a clean, lint-free, antistatic and dry cleaning-cloth to clean the device and the
display.
Do not use any carbon-based cleaning agents or gasolines, alco-
hols or similar fluids for cleaning. These might attack the surface
of the unit. Moreover, the vapours are unhealthy and explosive. Do
not use any sharp-edged tools, screw-drivers or metal brushes
etc. for cleaning either.
Technical data and measuring tolerances
Technical data
Display . . . . . . . . . . . . . . . . . : 4-digit display up to 9999 with two smaller four-digit
subdisplays,symbol displays and units
Max. measurement rate. . . . :1.25 measurements per second,
i.e. 5 measurements within 4 seconds