5
Keyboard Protection Cover
All datalogger models are provided with a 4-key keyboard:
in HD226… and HD227… the two central keys are not
used. The keyboard is protected by a cover indicating on the
front the functions of the keys below. The cover is pressed
in its lodgement: to access keys, open the cover using your
nail as a lever on one of the two lateral slots.
Connecting the External Probes
Temperature and temperature/humidity external probes (according to
the model), as well as the serial cable for the connection to a PC,
have to be connected through the socket placed at the base of the in-
strument. As shown in the picture aside, on the instrument connector
there is a triangle that helps the user in inserting the probes: the ver-
tex of this triangle has to be aligned with the arrow on the probe con-
nector. When inserting, keep the instrument socket and the probe
connector aligned; do not try to insert the connector in a different po-
sition: the connector might be damaged irreparably.
TRIANGLE
ON THE
INSTRUMENT
ARROW ON THE
CONNECTOR
