VOLTCRAFT 309 Bedienungsanleitung Seite 24

d) Data logger, recording of measuring values
The recording of the measuring values is started with the REC button. Every 5s (adju-
stable, recording interval), for example, the measuring values are recorded (T1, T2,
T3 and T4) with time registration. The values are filed at a memory location. You can
see the values in the data logger window of the computer.
Proceed as follows to set the recording interval:
Actuate the button "T1 - T2" at the same time when you turn-on the thermometer
and you will get to the setup "Set". Now actuate the button "MAX MIN" once. After
that, there will appear "Int" for Interval and a flashing minute display. Now set the
desired recording interval in minutes and seconds. The maximum recording interval
is 59 minutes and 59 seconds. The minimum value is limited to "00: 01" (= 1s).
Actuate the "MAX MIN" button once again after completed setting and you will get
back to the current temperature measuring display.
Note!
Each press of a button is confirmed with a short "Beep" of the installed beeper.
C3 Jack assignment
The jacks T1 to T4 are so-called unipolar blade contact jacks. You must connect the
K type temperature sensors to these jacks if you want to carry out temperature mea-
surements according to the sensor specifications. Take into account that the blade
contact jacks have different widths.
Never try to squeeze the connectors the wrong way (+ and –
mixed up) with force into the jacks. The jacks would be destroyed
definitely and should be replaced.
The jack "OUTPUT" is the serial RS-232 interface in 3,5 mm stereo jack format. The
assignment can be defined as follows (connector plan):
At the back of the connector there is the ground = GND = reference mass (= refe-
rence potential)
In the centre of the connector there is the contact RX = 5 V high input (= data input)
At the front at the point there is the contact TX = 5 V high output (= data output)
And finally there is the jack DC 9V. You can connect here a power supply unit with
following output data: 9 V direct voltage, if possible, stabilised, with an output cur-
rent of at least 100 mA, a connector outside diameter of 3,5 mm and a connector
inside diameter of 1,35 mm. The polarity: minus "-" inside, plus "+" outside.
D Working position
Always operate the digital thermometer 309 so that you can read the liquid-crystal
display (LCD) or that the digital display points upwards.
26
Connection of the PC, installation of the
software
The communication between the thermometer and an IBM compatible PC can only
take place if the following requirements are met:
1. a connection between PC and thermometer and
2. the installation of the software
Concerning 1.
Connect the supplied interface circuit to the 9-pole sub D jack "COM 1" at the tur-
ned-off PC and then to the 3,5 mm stereo jack bush at the thermometer. Now check
the safe fit of the plug-in connection and turn-on both the thermometer and the PC.
Concerning 2.
There is a CD attached to the data logger digital thermometer 309. The software that
can be found on this CD now needs to be loaded on the PC. Put the CD into the rele-
vant CD-ROM drive of the PC and close the drive. Now the automatic setup starts.
Follow the instructions on the screen and finish the installation with a restart "Finish"
or
Click the Start button and then the field "Programs". Click the field "Windows-
Explorer" right at the bottom. Now click in the Windows-Explorer the field "D" or "E"
or "F" or something like that depending on the designation of your CD-ROM drive.
The contents of the CD are indicated. Double click the Icon "Setup".
Now the setup takes place. Follow the instructions on the screen:
First "Initializing" (basic elements) => window "ThermoLog" => "Welcome....." =>
"Components"- Selection => file designation in the start window => "Copying instal-
lation files" => "Reboot windows" with "finish".
After completed installation and restart, open the file "Programs" and click there
"Test Link" => "Se 309" and finally once again "Se 309".
Now the working window appears more or less quickly (depending on the working
storage and the speed of your computer). Further information will follow in the next
chapter.
27