VOLTCRAFT 309 Bedienungsanleitung Seite 22

Never operate the measuring instrument when it is open.
Do not leave the used batteries in the measuring instrument. Even
leakage-protected batteries may corrode. The chemicals which
may be set free damage your health and the battery chamber.
Defective, used batteries are to be considered as special waste
and must be disposed of in an environmentally compatible way.
Used batteries can be given back free of charge at the collecting
boxes provided by your municipality, at our branches or at the
shops that sell batteries and accumulators. There you can find
specially marked collecting boxes. It is not permitted to put used
batteries into the normal domestic waste.
B Connection of the temperature sensors
For your measurements, make only use of temperature sensors that are specified for
this purpose (in this case K type). Always examine the connectors and the sensor
ends (" pearls") before use and make sure that the insulation is not damaged.
Always ensure to expose only the temperature sensors to the
temperatures that are to be measured. Always observe the safety
instructions and the technical specifications concerning the wor-
king temperature. Never exceed the max. input quantities.
C Putting-into-operation
C1 Basic setting
The measuring instrument is turned-on and turned-off with the colour button "I" (in
the circle).
For turning-off the device it is necessary to keep the button pressed until the display
disappears (... 3... 2... 1... off). The device can also be turned-off by means of the
automatic power-off function. Automatic power-off means that the device is auto-
matically set to the so-called "sleep mode" ("stand-by"). The device will be turned-
off after approx. 30 minutes provided that
there are no buttons actuated or that
the measuring instrument does not do any recordings of measuring values (REC)
or that
the automatic power-off function has not been turned-off before.
If you want to turn-off the automatic power-off function, actuate the Hold button at
the same time when you turn-on the thermometer. The symbol "
the automatic turning-off has been deactivated.
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ture data). The max. setting time of the Sampling Rate is 59 minutes and 59 seconds.
The shortest setting is 2s, that means every 2 s there are new screen contents
appearing (new measuring values).
The three buttons to the right of them for the "Normalcursor" (arrow symbol) the so-
called X-marker to set X-markings and the "T" for a text comment in the stopped
temperature writing.
To the right of it, there is the Clear button which serves to delete made settings.
To the right of it, there is the button for "Undo Zoom". If you have zoomed a detail
with the mouse (keep the left mouse key pressed) you can now undo this zoom with
the "Undo Zoom".
To the right of it (between "Undo Zoom" and "Graph Options"), there is a inconspi-
cuous field "Split". If you click this field, the measuring depiction will be split from
one-channel presentation to four-channel presentation and vice versa.
Graph Options
If you click this field, you will get to a further window which is called "Customization".
With this field and the contained field commands you can create a main and a subtit-
le in different founts, change the background colour, make the grid lines disappear,
etc.
Y- Axis
When you click this field, you can define the temperature depiction range, e.g. from
–20° to +60° or –50° to +200°. The unit depends on the thermometer setting, the big-
ger the range, the less exact the depiction.
If you want to close the window "Real- Time Graph", click the "x" at the top on the
right in the menu "Graph".
Below the "screen" with the continuous temperatures (channel 1 to 4) there is a table
that registers the lowest and the highest appearing temperatures of each channel
with time. Stop the measuring writing and the average value AVG can be seen, too.
In that way you can, for example, find out at what time a temperature has changed at
which sensor in which way.
C) Data Logger
If you click this window symbol, you will see two submenus: "Load" to start the data
logger and "Setup" for the alignment of the measuring instrument to the PC (time
" indicates that
synchronous etc.). Click "Load" and there will appear a mix of "Real-Time- Graph", a
"MAX MIN" depiction (below) and a display of "Data Sets" (data records) to the left of
it. Click one of these data records and the contents will be depicted on the screen,
provided that they have been filed. At the bottom you see the maximum value (MAX)
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