27
26
• Allow the solution to cool, and pour it
into the chamber marked "RH11.1%",
making sure that no residue remains on
the walls of the glass container.
• Seal the chamber well when not in use,
as the LiCl solution is extremely hygro-
scopic and tends to capture the humidity
present in the air causing the solution to
expand in volume and overflow from the
container.
• Pour approximately 12 cc of distilled wa-
ter 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 for-
mation of lumps. Seal this container well
when not in use.
The calibration kit needs 4 hours for proper
stabilization.
CALIBRATION PROCEDURE
• Bring the calibration kit to a temperature of approximately 20°C
and keep it in an area with minimum amount of temperature
variations.
• Remove the cap from the "RH 11.1%"
chamber containing the LiCl solution and
insert the probe paying attention that it
does not come in contact with the liquid.
• Remove the adhesive sticker which covers
the calibration trimmer access holes.
• Wait for the measurement to stabilize
(this takes approximately 4 hours).
Li Cl
11.1%
Na Cl
75.4%
CALIBRATION KIT
Li Cl
11.1%
Na Cl
75.4%
CALIBRATION KIT
H
2
O
12cc
Na Cl
Li Cl
11.1%
Na Cl
75.4%
CALIBRATION
KIT
12
3
6
9
4 h
CALIBRATION KIT
Li Cl
11.1%
Na Cl
75.4%
12
3
6
9
4 h
All Hanna thermohygrometers have been precalibrated at the factory.
Hanna Instruments uses state-of-the-art thermally-isolated humidity
chambers for this purpose.
It is generally recommended to have all thermohygrometers recalibrated
at least once a year.
For an accurate annual recalibration, contact your dealer or the
nearest Hanna Customer Service Center.
You can also check the status of your thermohygrometer and perform
a quick RH recalibration (with an accuracy of ±5%) by using the
optional Hanna
HI 7101
mini-calibration chamber.
The kit is composed of two thermally-isolated
chambers, each one equipped with a cap
and three bottles containing the appropriate
precalibrated saturated salts to produce a
known RH value.
PREPARING THE CALIBRATION SOLUTIONS
• Pour approximately 26 cc of distilled wa-
ter into a glass container.
• Immerse this container into a bath of ice
and water.
• Slowly add the contents of a
HI 7111
bottle containing LiCl into the glass con-
tainer while stirring gently.
• When the salts have dissolved completely,
add all the content of the second bottle
of
HI 7111
.
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
Li Cl
11.1%
Na Cl
75.4%
CALIBRATION KIT
H
2
O
26 cc
Li C
l
Li C
l
