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NOTE
MODELS 61OB, 6lOBR ELECTROMETERS
To check
zero
on the Model
610B,
use only
the
ZERO CHECK Button
on the Model
6107.
Do not
use the
ZERO CHECK Button
on the Model
610B.
The Button
on the
Adapter
isdesigned
to disconnect
the
Hi electrode
before
shorting
the Model
610B leads.
If
the Model
610B ZERO CHECK Button
is used
to check
zero
the
electrodes
will
be shorted
and may be damaged.
f.
To obtain
a reading,
set
the Model
6108 METER Switch
to CENTER ZERO.
Set the
Range
Switch
to VOLTS.
Use the
appropriate
range
for
the Multiplier
Switch.
Open the
ZERO
CHECK
Button
on the
Model
6107.
Read the
voltage
off
the
lower
meter
scale.
To convert
the voltage
to pH, consult
the Handbook
of Chemistry
and Physics.
NOTE
If
the Adapter
becomes
contaminated,
clean
it
with
distilled
water
followed
by
a thorough
swabbing
with
pure methyl
alcohol,
CH30H.
This
will
suffice
for
most
contaminants.
5-10.
XODEL 370 RECORDER.
a.
The Model
370 Recorder
is uniquely
compatible
with
the Model
6108 as well
as other
Keithley
electrometers,
microvoltmeters
and picoammeters.
The Recorder
is
a high
quality
economical
instrument
that
maximizes
the
performance
of
the Model
6108,
and many other
Kefthley
instruments,
even
in the most critical
applications.
The Model
370 can be used
with
the Model
6108 to record
voltage,
resistance,
currents
and charge
over
the Node1
6108'~
entire
range.
b.
The Model
6108 has the output
necessary
to drive
the
Recorder
directly
(1 volt,
1
milliampere),
thus
eliminating
the need
for
a pre-amplifier.
The Model
370 floats
1500
volts
off
ground.
The Recorder
is
specially
shielded
to avoid
pickup
of extraneous
sig-
nals.
The response
time
of
the Model
370 Recorder
is
0.5
second;
linearity
is
'1% of
full
scale.
Ten chart
speeds
-
from
314 inch
per hour
to 12 inches
per minute
-
are select-
able
with
front
panel
controls.
The 6-inch
chart
has a rectilinear
presentation.
The
Node1 370 Recorder
has a self-priming
inking
system.
Chart
paper
and Fnk refills
are
easy
to
install.
c.
The Model
370 is very
easy
to use with
the Model
6108.
All
that
is necessary
is con-
necting
the
two units,
setting
the Model
6108 Output
Switch
to 1MA and adjusting
an easily
accessible
control
for
full-scale
recorder
deflection.
The furnished
Model
3701 Input
Cable
mates
wtth
the
output
connector
on the Model
610B.
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