8
TM500-EU-EN v1.1 12/13
switched
on
(when
the
MAX
‐
MIN
button
was
first
pressed).
To
delete
the
MAX
value,
press
the
HOLD
button.
The
display
will
show
just
the
REC
icon.
4.
Press
the
REC
button
again
to
view
the
current
MIN
readings
(MIN
icon
appears).
The
readings
on
the
display
are
now
the
lowest
readings
encountered
since
the
REC
icon
was
switched
on
(when
the
MAX
‐
MIN
button
was
first
pressed).
To
delete
the
MIN
value,
press
the
HOLD
button.
The
display
will
show
just
the
REC
icon.
5.
To
exit
the
MAX
‐
MIN
mode,
press
and
hold
the
REC
button
for
at
least
1.5
seconds.
The
meter
will
beep,
the
REC
‐
MAX
‐
MIN
icons
will
switch
off,
the
MAX
‐
MIN
memory
will
clear,
and
the
meter
will
return
to
the
normal
operating
mode.
Display
Backlight
To
turn
the
display
backlight
ON
or
OFF,
press
the
backlight
button
momentarily.
The
meter
will
beep
when
switching
the
backlight
ON
or
OFF
unless
the
beeper
is
disabled
as
described
in
the
Setup
Mode
section
of
this
user
guide.
Time
Check
Momentarily
press
the
SET
button
and
the
meters
current
Date
and
Time
will
appear
in
the
lower
left
corner
of
the
display.
Sampling
Time
Check
When
in
normal
mode,
press
the
LOGGER
button
momentarily.
The
Sample
rate
setting
will
appear
in
the
lower
left
corner
of
the
display.
RS
‐
232/USB
PC
Interface
For
streaming
of
data
to
a
PC
via
the
RS232
Output
jack,
the
optional
407001
‐
USB
kit
(USB
cable
and
driver
CD)
along
with
the
407001
software
are
required.
AC
Power
Adaptor
This
meter
is
normally
powered
by
eight
(8)
1.5V
‘AA’
batteries.
An
optional
9V
power
adaptor
is
available.
When
the
adaptor
is
used,
the
meter
is
permanently
powered
and
the
power
button
will
be
disabled.
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