12
13
BATTERY REPLACEMENT
Battery replacement must only take place in a
safe area and using the battery type specified in
this instruction manual.
FOR HI 8564
When the battery becomes
weak, the "V" symbol is dis-
played on the LCD to warn the
user.
In order to replace the bat-
tery, simply slide off the cover
and replace the 9V battery
with a new one.
FOR HI 93640
When the battery becomes weak, the "V" sym-
bol is displayed on the LCD to warn the user.
HI 93640 is provided with the advanced BEPS
(Battery Error Preventing System) technol-
ogy, that turns the meter off when a low
power condition is detected. It is recommended
to replace the 9V battery with a new one.
When the battery need to
be replaced, simply slide off
the battery cover and install
a new 9V battery.
BATTERY
9
VOLT BATTERY
9
VOLT BATTERY
• 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.
CALIBRATION KIT
Li Cl
11.1%
Na Cl
75.4%
12
3
6
9
4 h
H
H
