User Guide

11
• Remove the cap from the
"RH 75.4%" chamber con-
taining the NaCl solution and
insert the probe.
• Wait for the measurement to
stabilize (approximately
4 hours)
• Turn the high humidity trimmer until the
readout on the display is 64.3%.
• Wait for 1 hour and readjust if necessary.
• Leaving the probe in the "RH 75.4%" cham-
ber, adjust the low humidity trimmer until the
value of 75.4% is read.
• Now, the humidity calibration is complete.
Spare saturation salts are also available:
HI 7111/P (LiCl) for low range humidity, and
HI 7121/P (NaCl) for high range humidity.
C
A
LIB
R
A
T
IO
N
K
IT
L
i C
l
11
.1
%
N
a
C
l
7
5
.4
%
12
3
6
9
4 h
H
H
RH Calibration Procedure (HI 8564 only):
• Bring the calibration kit to a temperature of
approximately 20°C.
• Remove the cap from the
"RH 11.1%" chamber con-
taining the LiCl solution and
insert the probe paying at-
tention not to tip it into the
liquid.
• Remove the adhesive sticker which covers
the calibration trimmer access holes.
• Press the ON/OFF key to
switch the instrument on.
• Wait for the measurement to
stabilize (this takes about
4 hours).
• Turn the low humidity trimmer (see Func-
tional Description) until a value of 0.0% is
seen on the readout (reading between 0.0%
and 1.0% RH is also acceptable).
• Remove the probe and tightly seal the cham-
ber containing the LiCl solution.
10
C
AL
IB
R
A
T
IO
N
K
IT
Li Cl
11.1%
N
a Cl
75.4%
12
3
6
9
4 h
H
ON
OFF