User manual

23
Presentation, system prerequisite(s)
This digital thermometer 309 with PC connection is equipped with several special
features which complete some measuring in a significant way:
With the function "MAX MIN" you can, for example, detect and record the maximum or
the minimum measuring value that appears. With the function "HOLD" it is possible to
record quickly changing measuring values (for the measuring protocol). The recording of
the measuring values is started with the button "REC". With the button "° C/° F" you can
choose between two measuring units: the "English” unit in Fahrenheit and the unit used
in the "remaining European countries” in Celsius. If you actuate the button "T1 - T2" dur-
ing the turning-on, you will get to the setup menu. Further information will be given later.
By means of the supplied interface circuit (serial), a bidirectional connection to the
PC is made. After the installation of the relevant software on the PC, the digital ther-
mometer and the PC can communicte. The following requirements must be met for
installing and using the software:
At least 486 DX2/ 100 with 16 MB RAM or faster/bigger
At least Windows `95 or `98 or NT 4.0 or higher
A CD ROM drive, a resolution of at least 800 x 600
And finally approx. 7 MB free fixed-disk storage
The measuring range reaches from –200° C to +1370° C or from –328° F
to +2498° F. The temperature range of the supplied sensors, however, is limited to
a range that reaches from –50° C to +200° C. The digital thermometer 309 can be
used universally for hobby, profession or school purposes, etc.
Handling, putting-into-operation
A Insertion of the battery – Replacement of the battery
Your measuring instrument must be equipped with a 9 Volt battery to function cor-
rectly. When the battery replacement symbol appears at the top on the left of the dis-
play, the battery must be replaced. Proceed as follows:
- Disconnect your measuring instrument from voltage circuit and PC,
- remove the temperature sensors from the measuring instrument,
- turn it off and
- remove the battery chamber cover pushing it carefully in arrow direction.
- Disconnect the used battery from the connecting clip and
- replace the battery with a new battery of the same type.
- Insert the connected battery into the battery chamber after completed replace-
ment of the battery and
- close the battery chamber carefully.
- Ensure not to squash the cable of the connecting clip (red/black) when closing
the battery chamber.