User Guide

• When the salt has dissolved
completely, add all the con-
tent of the second bottle of
HI 7111.
• Allow the solution obtained
to cool, and then pour it into
the chamber marked
"RH 11.1%", making sure
that no residue remains on
the walls of the glass con-
tainer.
• Seal the chamber well when not in use, as
the LiCl solution is extremely hygroscopic
and tends to capture the humidity present in
the air causing the solution to expand in
volume and to overflow from the container.
• Pour approximately 12 cc of
distilled water into the other
chamber marked "RH
75.4%".
• Add all the content of the
HI 7121 bottle containing
NaCl while continuously
shaking the container to
avoid the formation of lumps.
Seal this container well when
not in use.
The calibration kit needs
4 hours for stabilization.
12
cc
9
Li C
l
Li Cl
11.1%
Na Cl
75.4%
C
A
L
IB
R
A
T
IO
N
K
IT
L
i C
l
11
.1
%
N
a
C
l
7
5
.4
%
CALIBRATION KIT
H
2
O
Na Cl
L
i C
l
11
.1
%
N
a
C
l
7
5
.4
%
CALIBRATION KIT
12
3
6
9
4 h
8
CALIBRATION
All Hanna hygrometers have been
precalibrated at the factory.
Hanna Instruments uses state-of-the-art ther-
mal humidity chambers for this purpose.
It is generally recommended to have all
hygrometers recalibrated at least once a
year.
For an accurate annual recalibration, con-
tact your nearest Hanna Service Center.
You can also check the status of your
HI 8564 and perform a quick recalibration
(with an accuracy of ±5%) by using the
Hanna mini-calibration cham-
bers HI 7101.
The kits are composed of two
thermally isolated chambers,
each one equipped with a
threaded cap and three bottles
containing the appropriate precalibrated satu-
rated salts to produce a known RH value.
Preparing the Calibration Solutions
(HI 8564 only):
• Pour approximately 26 cc of
distilled water into a glass
container.
• Immerse this container into
a bath of ice and water and
shake briefly.
• Slowly add the contents of
a HI 7111 bottle containing
LiCl into the glass container
while continuing to shake.
Li C
l
11 .1 %
N
a C
l
75.4%
CALIBRATION KIT
H
2
O
26 cc
Li C
l