VOLTCRAFT 300 K Notice D'emploi page 30

Advice!
A short 'beep' from the built-in bleeper sounds in confirmation
every time a key is pressed.
C3 Bush occupancy
a) Measuring imput
The measuring bush is a so-called unipolar (+ and -) knife-edge
contact bush. You must connect this bush to the K type tempera-
ture sensor if you want to carry out temperature measurements
correspondingly to the sensor specification. Take care that the
knife-edge contacts of the connecting plug are of different widths.
Never attempt to forcibly replace the connecting
plug (+ and -) by pressing on the bushes. The bush-
es would be irreparably destroyed and they would
have to be renewed.
b) Serial RS-232 interface
The 'OUTPUT' bush is the serial RS-232 interface in 3.5 mm stereo
jack format. The occupancy is established as follows (view of plug).
The ground ( = GND = reference magnitude or potential) is at the
back of the plug.
The RX contact (= 5 V high imput = data imput) is located at the
plug's centre.
The TX contact is located in front at the tip ( = 5 V high output =
data output).
First of all, before communication between the thermometer and
an IBM-compatible PC can take place the conditions must be set
up:
A connection between PC and thermometer, and the installation of
the software.
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