Hanna Instruments HI 9064 - Manual (Page 5)

8 9
12 cc Li Cl
11.1%
Na Cl
75.4%
CALIBRATION KIT
H
2 O
Na Cl
Li Cl
11.1%
Na Cl
75.4%
CALIBRATION KIT
12
3
6
9
4 h
• 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 approximately 4 hours
for stabilization.
CALIBRATION PROCEDURE
• Bring the calibration kit to a temperature of approximately 20°C.
• Remove the cap from the "RH 11.1%" cham-
ber containing the LiCl solution and insert
the probe paying attention not to dip it into
the liquid.
• Remove the adhesive sticker which covers the
calibration trimmer access holes.
• Press the ON/OFF key to switch the instru-
ment on.
• Wait for the measurement to stabilize (this
takes about 4 hours).
• Adjust the low humidity trimmer to read 0.0% (readings between
0.0% and 1.0% RH are also acceptable).
Note: The central trimmer is related to the temperature calibration,
and you will find it on HI 9065 probe only.
CALIBRATION KIT
Li Cl
11.1%
Na Cl
75.4%
ON/OFF
12
3
6
9
4 h
H
Li Cl
11.1%
Na Cl
75.4%
CALIBRATION KIT
All HANNA hygrometers have been precalibrated at the factory.
HANNA instruments
® uses state-of-the-art thermal humidity cham-
bers for this purpose.
It is generally recommended to have all hygrometers recalibrated at
least once a year. For an accurate annual recalibration, contact the
nearest Hanna Service Center.
You can also check the status of your hygrom-
eter and perform a quick RH recalibration
(with an accuracy of ±5%) by using the
HANNA calibration chamber HI 7101.
The kit is composed of two thermally isolated chambers, both equipped
with a threaded 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 and shake briefly.
• Slowly add the contents of a HI 7111
bottle containing LiCl into the glass con-
tainer while shaking.
• When the salts have dissolved completely,
add the content of the second HI 7111
bottle.
• Allow the solution to cool, and pour it into
the chamber marked "RH11.1%", mak-
ing 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.
Li Cl
11.1%
Na Cl
75.4%
CALIBRATION KIT
H 2
O
26 cc
Li Cl
CALIBRATION