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MODELS 6108,
610BR ELECTROMETERS
j-9.
MODEL 6107 pH ELECTRODE ADAPTER.
a.
The Keithley
Model
6107 pH Electrode
Adapter
is designed
to allow
accurate
and
convenient
pH potential
measurements
with
the Keithley
Model
6108 Electrometer
and
other
Keithley
electrometers
having
a uhf
input
receptacle.
The Adapter
accepts
a
Beckman and Coleman
(B-C)
or a Leeds
and
Northrup
(L&N) connector.
The two termin-
als
on the Model
6107 marked
RRF accept
a
banana
jack
or a phone
tip
jack.
b.
The Adapter
uses
Teflon
insulation
on all
high
impedance
connections.
Guard-
ed measurements
can be made with
the i%deL
6107 by connecting
the Xl OR GND Terminal
on the Model
6L07 to the X1 OUTPUT Termin-
al
on the
rear
panel
of the Model
6108.
The ZERO CHECK Button
on the Adapter
allows
checking
zero
on the Model
610B without
shorting
the
pH electrodes.
c.
To use the Model
6107 with
the Model
6LOB, set
both
the
ZERO CHECK Button
on
LGlJU 3b.
Keitniey
?lodeL bLUb Electrometer
Connection
Kit.
Refer
to Table
6 for
com-
ponents.
the NodeL 6LOB and the
ZERO CHECK Button
on the Model
6107 to the
LOCK Position.
The
FEEDBACK Switch
on the Model
6108 can be in either
the FAST or NORMAL Position.
d.
Connect
the Adapter
cable
directly
into
the Model
6lOB INPUT Receptacle.
Connect
the Xl OR GND Terminal
on the Model
6107 to the Ground
Post on the
front
panel
of
the
Model
6LOB if
guarded
measurements
are not
desired.
For guarded
measurements
connect
the
XL OR GNU Terminal
to the XL OUTPUT Terminal
on the
rear
panel
of
the Model
6108.
a.
Insert
the
pH electrodes
into
the Model
6107 and open the ZERO CHECK Button
on the
IdeL
610B.
Node1 6107
-------------
'=+
<
;Z:ro
Checu
f
I
0
I Guard
i
-------s-e*
----
I
LGURF, 37.
?lodel
6107 pH Electrode
Adapter
Wiring
Diagram.
--(Hi
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