ADCMT 12707 User manual

©2009 ADC CORPORATION First printing March 31, 2009
All rights reserved. Printed in Japan
12707
Resistivity Chamber for Liquid Sample
OPERATION MANUAL
Manual Number FOE-00000049A00

C-1
12707 Resistivity Chamber for Liquid Sample Operation Manual
Table of Contents
1. Introduction..................................................................................................1-1
1.1 Product Overview ......................................................................................................................... 1-1
1.2 Before Using the Product ............................................................................................................. 1-2
1.2.1 Appearance and Accessory Check................................................................................. 1-2
1.2.2 Precautions for Transportation and Measurement ......................................................... 1-3
1.2.3 Preparations of a Measuring Instrument and Cables/Adapter ....................................... 1-3
1.2.4 Operating Environment ................................................................................................. 1-4
2. Part Names and Descriptions .......................................................................2-1
2.1 Part Names.................................................................................................................................... 2-1
2.1.1 Front Panel..................................................................................................................... 2-1
2.1.2 Top Panel (with the Cover Opened) .............................................................................. 2-2
2.1.3 Electrodes ...................................................................................................................... 2-3
2.2 Part Descriptions........................................................................................................................... 2-4
3. Measurement Method ..................................................................................3-1
3.1 Cleaning the Electrodes ................................................................................................................ 3-2
3.1.1 Cleaning the Internal Electrode ..................................................................................... 3-2
3.1.2 Cleaning the Ring Electrode.......................................................................................... 3-4
3.2 Connecting to the Measuring Instruments.................................................................................... 3-5
3.2.1 Connecting with the 8340A........................................................................................... 3-5
3.2.2 Connecting with the 8240.............................................................................................. 3-6
3.2.3 Connecting with the 8252.............................................................................................. 3-7
3.3 Pouring a Sample.......................................................................................................................... 3-8
3.4 Setting the Electrode..................................................................................................................... 3-9
3.5 Measurement .............................................................................................................................. 3-10
3.5.1 Setting the 8340A ........................................................................................................ 3-10
3.5.2 Setting the 8240........................................................................................................... 3-10
3.5.3 Setting the 8252........................................................................................................... 3-11
3.6 Volume Resistivity Calculation .................................................................................................. 3-12
3.6.1 When using the 8340A ................................................................................................ 3-12
3.6.2 When Using Measuring Instruments Other than the 8340A .......................................3-13

C-2*
12707 Resistivity Chamber for Liquid Sample Operation Manual
4. Precautions for Measurement ......................................................................4-1
4.1 Change in Measurement Current .................................................................................................. 4-1
4.2 Discharge and Charge................................................................................................................... 4-3
4.3 Effect of Noise.............................................................................................................................. 4-3
4.4 Effect of Vibration ........................................................................................................................ 4-3
4.5 Securing Insulation ....................................................................................................................... 4-3
5. Specifications ...............................................................................................5-1
Appendix ...........................................................................................................A-1
A.1 Volume Resistivity Measurement Principle and Calculation Method......................................... A-1
A.2 Internal Connection ..................................................................................................................... A-3

F-1*
12707 Resistivity Chamber for Liquid Sample Operation Manual
List of Illustrations
No. Title Page
1-1 Operating Environment ................................................................................ 1-4
2-1 Front Panel ................................................................................................... 2-1
2-2 Top Panel ...................................................................................................... 2-2
2-3 Electrode ....................................................................................................... 2-3
3-1 Internal Electrode Assembly Diagram ......................................................... 3-3
3-2 Ring Electrode Assembly Drawing .............................................................. 3-4
3-3 Connecting with the 8340A.......................................................................... 3-5
3-4 Pouring a Sample .......................................................................................... 3-8
3-5 Electrode Connection Diagram ..................................................................... 3-9
4-1 Measurement Circuit ..................................................................................... 4-1
4-2 Measurement Current ................................................................................... 4-2
A-1 Measurement Principle ................................................................................. A-1
A-2 Electrode Coefficient Calculation ................................................................ A-2
A-3 Internal Connection ...................................................................................... A-3

T-1*
12707 Resistivity Chamber for Liquid Sample Operation Manual
List of Tables
No. Title Page
1-1 Connectable Instruments and Necessary Cables/Adapter ............................ 1-3

1-1
12707 Resistivity Chamber for Liquid Sample Operation Manual
1.1 Product Overview
1. Introduction
1.1 Product Overview
The 12707 is a sample box to measure the volume resistivity of a liquid sample such as liquid
crystal, consisting of a shield box and electrodes.
It is used together with a digital ultra-high resistance/micro current meter such as 8340A or an
electrometer such as 8252 or 8240.
Features:
zIt requires only 0.8 cc of sample for measurement.
zThe guard electrode offers precise volume resistivity measurement.
zThe electrodes are easy to be disassembled and cleaned.
zThe following functions are included for safety operation:
1. Voltage applied to the electrodes is shut off by opening the cover.
2. A contact signal according to opening and closing of the cover controls the measur-
ing instrument.

1-2
12707
1.2 Be
f
1.2
B
1.2.1
W
T
T
T
z
Resistivity
f
ore Using t
h
B
efore Us
i
Appeara
n
W
hen receiv
i
T
he 12707 c
o
T
he ring ele
c
T
he followin
z
Items to
If there
ration o
r
Our ad
d
Chamber f
o
h
e Product
i
n
g
the P
r
n
ce and Ac
c
i
ng the 1270
o
nsists of th
e
c
trode and th
e
g accessorie
s
be checked
is any dam
a
r
your sales
r
d
ress and ph
o
Shield box
Connect
i
(DCB-P
P
o
r Liquid S
a
r
oduct
c
essor
y
C
h
7, inspect th
e
e
shield box
a
e
internal el
e
s
are includ
e
a
ge in appea
r
r
epresentati
v
o
ne number
a
i
on cable: 3
P
180X01)
a
mple Ope
r
h
ec
k
e
contents o
f
a
nd the elec
t
e
ctrode are
p
e
d:
r
ance or abs
e
v
e.
a
re listed at
t
R
r
ation Man
u
f
the packag
e
t
rodes.
p
acked separ
a
e
nce of the
p
t
he end of th
i
R
ing electrod
e
Op
e
(E1
2
u
al
e
.
a
tely.
p
arts, please
i
s manual.
e
Int
e
Electrode
e
ration Man
u
2
707)
contact AD
C
e
rnal electro
d
u
al: 1
C
Corpo-
d
e

1-3
12707 Resistivity Chamber for Liquid Sample Operation Manual
1.2 Before Using the Product
1.2.2 Precautions for Transportation and Measurement
(1) Precaution for transportation
The internal electrode is not fixed to the shield box. Do not tilt the 12707, otherwise the
internal electrode may fall.
(2) Precaution for measurement
If measurement is performed with the 12707 tilted, a sample will overflow or the internal
electrode will not be fully soaked. Consequently, normal measurement values cannot be
obtained.
Perform measurement on a flat horizontal workbench.
1.2.3 Preparations of a Measuring Instrument and Cables/Adapter
The following table shows connectable instruments and necessary cables/adapter.
Table 1-1 Connectable Instruments and Necessary Cables/Adapter
Instrument
Cable/adapter 8340A 8240 8252
TRIAX-TRIAX cable (A01009) 999
Output cable (A01044) 9(*1)
Banana adapter (A08531) 9(*1)
Banana-banana cable (A01240) (*2) 9
BNC-BNC cable (A01036) 99
(*1) Supplied accessory
(*2) Banana cable with a cover for safety

1-4
12707
1.2 Be
f
1.2.4



Resistivity
f
ore Using t
h
Operatin
g

Use the
gas and
v
The am
b
and the
r
Be sure
condens

The sto
r
+85°C.
When n
o
with a p
store it
i
sunlight
.

When t
r
packagi
n
b
oard b
o
the foll
o
(1) Sep
a
inte
r
the
m
(2) Put
t
wit
h
(3) Fix
t
Chamber f
o
h
e Product
g
Environ
m
12707 in an
v
ibrations a
n
b
ient temper
a
r
elative hu
m
to use or
s
ation or fros
t
r
age temper
a
o
t in use fo
r
lastic sheet
o
i
n a low hu
m
.
r
ansporting
n
g material
s
o
x 5 mm or
m
o
wing proce
d
a
rate the 12
7
r
nal box an
d
m
with plasti
c
t
he
m
in a c
a
h
cushioning
t
he outside
w
o
r Liquid S
a
m
ent
area free fr
o
n
d away fro
m
a
ture should
m
idity should
s
tore the 12
7
t
ing.
a
ture range
r
a long tim
e
o
r put in a c
a
m
idity area
the 12707,
s
used at d
e
m
ore thick i
n
d
ure:
7
07 into th
e
d
the ring el
e
c
sheets res
p
a
rdboard bo
x
materials.
w
ith packing
a
mple Ope
r
o
m dust, cor
r
m
direct sunl
be 0°C to +
be 80% or l
e
7
07 with n
o
is from -25
e
, cover the
1
a
rdboard bo
x
away from
pack it wi
t
e
livery or a
n
accordanc
e
e
shield box
e
ctrode, and
p
ectively.
x
and protect
tape.
r
ation Man
u
r
osive
ight.
80°C,
e
ss.
o
dew
°C to
1
2707
x
, and
direct
t
h the
ca
r
d-
e
with
, the
wrap
them
Fi
gu
D
A
u
al
u
re 1-1 O
p
D
us
t
Direct sunl
127
Vibr
a
A
void using i
n
eratin
g
Env
i
igh
t
C
o
707
a
tion
n
a place as
b
i
ronment
o
rrosive
gas
b
elow.

2.
P
2.1 P
2.1.1
P
art Na
m
art Nam
e
Front Pa
n
1
2
m
es and
D
e
s
n
el
2
707 Resist
i
D
escrip
t
F
i
i
vity Cham
b
t
ions
i
gure 2-1
F
b
er for Liq
u
F
ront Panel
u
id Sample
(1) LID SI
G
(2) INPUT
(
3
)
V SOU
R
Operation
M
2.1 P
a
G
NAL conne
connecto
r
R
CE termina
2-1
M
anual
a
rt Names
cto
r
l

2-2
12707
2.1 Pa
r
2.1.2
Resistivity
r
t Names
Top Pane
l
Chamber f
o
l
(with the
o
r Liquid S
a
Cover Op
e
F
a
mple Ope
r
e
ned)
F
igure 2-2
T
r
ation Man
u
T
op Panel
u
al
(4) Elect
r
openi
n
(8) LID
S
(
7
)
V SO
(
6
)
GUA
R
(5) Meas
u
r
ode insertio
n
n
g
S
IGNAL swi
t
O
URCE termi
n
RD terminal
u
re terminal
n
t
ch
n
al

2.1.3 Electrod
e
(17) V ter
m
(13) Guard
(12) M
a
(14) Guard
1
2
e
s
m
inal
electrode
A
a
in electrod
e
electrode
B
2
707 Resist
i
F
(16
)
A
e
B
i
vity Cham
b
igure 2-3
E
)
G terminal
(15
)
b
er for Liq
u
E
lectrodes
)
M terminal
u
id Sample
(11) Internal
(10)
Operation
M
2.1 P
a
electrode
Ring
electrode
2-3
M
anual
a
rt Names

2-4
12707 Resistivity Chamber for Liquid Sample Operation Manual
2.2 Part Descriptions
2.2 Part Descriptions
zSee Figure 2-1.
(1) LID SIGNAL connector
A connector to output a cover open/close signal to the measuring instrument. When the
cover is closed, the terminals are short-circuited. When it is opened, the terminals are
open-circuited.
(2) INPUT connector
A connector to connect with a measuring instrument having a triaxial connector on the
INPUT such as the 8340A, 8252 or 8240. The center contact is connected to the MEAS-
URE terminal (5) on the top panel. The inner shield is connected to the GUARD terminal
(6) on the top panel.
(3) V SOURCE terminal
A terminal to connect with an application voltage source such as the 8340A or 8252. The
HI is connected to the V SOURCE terminal (7) on the top panel.
The maximum voltage of the 12707 is 45 V.
Be sure to operate the 12707 at or below the maximum voltage.
CAUTIO
N

2-5
12707 Resistivity Chamber for Liquid Sample Operation Manual
2.2 Part Descriptions
zSee Figure 2-2.
(4) Electrode insertion opening
The electrode is inserted into this opening. The projections in the inside are aligned with
the holes on the bottom of the electrode.
(5) MEASURE terminal
A terminal for measurement that connects with the M terminal (12) by using the supplied
cable (DCB-PP1801X01).
The insulation degradation of the MEASURE terminal has an influence directly on
measured values, causing measurement errors. If the terminal area gets dirty, clean it
with a swab soaked in absolute alcohol.
(6) GUARD terminal
A terminal to measure precisely the volume resistivity that connects with the G terminal
(13) by using the supplied cable (DCB-PP1801X01).
(7) V SOURCE terminal
A terminal to apply voltage that connects with the V terminal (17) by using the supplied
cable (DCB-PP1801X01).
(8) LID SIGNAL switch
Turns on when the cover is closed.
CAUTIO
N

2-6
12707 Resistivity Chamber for Liquid Sample Operation Manual
2.2 Part Descriptions
zSee Figure 2-3.
(10) Ring electrode
A container to put a measurement sample in. Voltage is applied to this electrode.
(11) Internal electrode
This electrode is used in the ring electrode. It contains the main electrode and the guard
electrodes.
(12) Main electrode
An electrode for measurement. It is connected with the M terminal (15).
(13) Guard electrode A
This electrode cancels current that flows around from the top of the main electrode. Con-
nects with the G terminal (16).
(14) Guard electrode B
This electrode cancels current that flows around from the bottom of the main electrode.
Connects with the G terminal (16).
(15) M terminal
It is connected with the main electrode (12) for measurement. Connects with the MEAS-
URE terminal (5) by using the supplied cable (DCB-PP1801X01).
(16) G terminal
It is connected with the guard electrode A (13) and the guard electrode B (14). Connects
with the GUARD terminal (6) by using the supplied cable (DCB-PP1801X01).
(17) V terminal
A terminal of the ring electrode to apply voltage. Connects with the V SOURCE terminal
(7) by using the supplied cable (DCB-PP1801X01).

3-1
12707 Resistivity Chamber for Liquid Sample Operation Manual
3. Measurement Method
3. Measurement Method
: Refer to Section 3.1.
: Refer to Section 3.2.
: Refer to Section 3.3.
: Refer to Section 3.4.
: Refer to Section 3.5, and 3.65
: Refer to Section 3.1.
Read through Chapter 4 "Precautions for Measurement" before starting measurement.
Start
Cleaning the electrodes
Connecting with a measuring instrument
Pouring a sample
Setting the electrode
Measurement
End
Cleaning the electrodes

3-2
12707 Resistivity Chamber for Liquid Sample Operation Manual
3.1 Cleaning the Electrodes
3.1 Cleaning the Electrodes
To perform precise measurement, clean the electrodes before and after measurement.
In insulation resistance measurement, dirt on the electrodes or sample residue may
cause measurement errors.
3.1.1 Cleaning the Internal Electrode
zSee Figure 3-1.
Procedure:
1. Remove the M terminal (4), the G terminal (5) and the flat head screw M3X20 (6), and
disassemble the internal electrode.
2. Clean the disassembled parts with the sample liquid, then ultrasonic-clean them with ab-
solute alcohol.
3. Clean the insulating materials (7) to (10) to remove the sample residue completely.
After cleaning, do not touch them with empty hands.
CAUTIO
N