Hanna Instruments hi 8666 Manual Do Utilizador

3

Remove the instrument from the packing ma-
terial and examine it carefully to make sure
that no damage has occurred during ship-
ment. If noticeable damage is found, immedi-
ately notify your Dealer.

Note: Conserve all packing material until the

instrument has been observed to func-
tion correctly because all defective
items must be returned to the Dealer
in their original packing.

HI 8666 is a 2-wire, 4 to 20 mA relative
humidity and temperature transmitter. The
instrument transmits electrically isolated out-
puts that are linear and proportional to RH%
and °C. It can be surface or panel mounted,
and used with a detachable connector. The
power must be supplied from an external
source from 12V to 24V. See the diagrams
on pages 4-6 of this instruction manual for
connections from the transmitter to other
equipment, such as recorder.

Note: After 30 minutes of measurements over

90% RH, the probe sensors could ex-
perience secondary absorption, lead-
ing to approximately +6% RH satura-
tion. This means that the readings will
be inaccurate. To restore the probe to
a normal condition, place the probe
into the LiCl well of HI 7102 for 24
hours (see page 9).