-
Operating
Instructions,
Ctd.
7.
Automatic
Shutoff
This
instrument will
automat
ically shut
down
after
""
34 minutes
if
no
keys
are pressed.
8.
Automatic
Shutoff
Override
You
may override the automatic shutoff
fea
-
ture at startup by pressing
down
the
"Hold"
key.
and
the
"
On"
key
at
the
same time. The
letter '
T'
will
light
up
in the display, indicating
that the s
hutoff
timer
is
in the override
mode
.
T
9.
Minimum/Maximum
Press
"Min/Max" once
and
the
minimum
val-
ues
will be displayed for approximately 7
sec
onds.
Press
"Mi
n/Ma
x" again
during
this time
and
the
r:na
x
imum
values will be displayed for 7
seconds.
Press
"Min/Max" a third time
during
this peri-
od
and
the
unit
will return
to
normal opera
tion.
Unit
will
always return
to
normal operation
after 7 seconds
if
no
keys
are pressed.
Note:
Turning the
unit
off
resets
the
minimum
and
maximum values.
a
Minimum
Display
Maximum
Display
Battery
Installation
Battery should be replaced
as
soon
as
possible
after
low
battery indication to maintain rated
accuracy
of
unit
Calibration
Your instrument was carefully tested
and
calibrated before being
shipped from the factory.
Additional calibration
is
not
required. However. should calibra-
tion be desired in the future.
follow
these procedures:
1. Identify a standard that
is
more
accurate than this
unit
Factory
supplied calibrati
on
salts
or
elec-
tronic instruments recently cali-
brated
at
a certified lab are rec-
ommended. Sling psychron-
meters
and
instruments using
mechanical sensing elements
(human hair.
wood
elements. etc.) are NOT
recommended. These instru-
ments can be subject to great
inaccuracies
due
to the nature of
mechanical measurement.
2.
Place
the probe
of
the
unit
into
the calibration salt capsule
or
into
a controlled environmental
chamber
and
allow
for complete
stabilization. For best results.
calibrate the
unit
at
levels typical-
ly monitored
during
normal a
operation. Calibration in
an
open
room
without
the salt cap-
sule
or
a chamber
is
not
recom-
mended
as
temperature
and
humidity
can vary greatly
within
a very small area.
3.
To activate
the
calibration mode.
turn the
unit
off
.
Now
press
the
"
On/Off'
key
and
the "C/F" key
at
the same time. A small
"J
" will
appear in
the
display
to
indicate
you
are in the calibration mode.
Step
3:
Activating
Calibration
Mode
