Operation
PT12
Manual
7/20/2021
Page
12
of
48
4.1.2
SMART
PROBES
The
LEMO
connector
of
each
smart
probe
is
embedded
with
a
Maxim
Integrated
DS28EC20
‐
20Kb
1
‐
Wire
EEPROM
chip.
This
memory
chip
holds
the
probe’s
coefficients,
serial
number,
and
calibration
date.
When
a
smart
probe
is
plugged
in,
the
PT12
automatically
detects
it
and
extracts
configuration
information
from
the
chip.
Manual
entry
of
coefficients
is
not
required
as
the
configuration
information
travels
with
the
probe
regardless
of
which
channel
it’s
plugged
in
to.
4.1.3
USER
‐
SUPPLIED
PROBES
User
supplied
probes
may
be
utilized
by
wiring
them
to
a
LEMO
connector
(part
#FGG.1B.306).
To
create
a
basic
probe,
short
pin
1
to
pin
6.
To
create
a
smart
probe,
insert
a
Maxim
Integrated
DS28EC20
with
pin
1
of
the
chip
to
pin
1
of
the
LEMO
and
pin
2
of
the
chip
to
pin
6
of
the
LEMO.
Pin
3
of
the
chip
is
unused
and
should
be
cut
off.
See
Image
3.1.2
above.
Both
smart
and
basic
probes
will
require
an
initial
entry
of
coefficients.
Upon
saving,
the
smart
probe
coefficients
will
travel
with
the
probe.
Basic
probe
coefficients
will
be
retained
in
the
PT12
channel.
LEMO
F66.1B.306
DS28EC20
Image
3.1.2
