CX105 Conductivity/Resistivity Transmitter
User Manual
REV A.6
Sensorex Corporation, USA
11751 Markon Drive
Garden Grove, CA. 92841 U.S.A.
www.sensorex.com
IMPORTANT SAFETY INFORMATION
Please read and observe the following:
Remove line power before wiring transmitter connections
W
iring or repairs should only be performed by qualified personnel and
un
powered transmitte
henever it appears that transmitter safety is questionable, disable the Transmitter
W
nsure against any unintended operation. For example, an unsafe condition is likel
e
wh
en:
1） The transmitter appears visibly damage
2） Th
3） The transmitter has been stored for long periods at temperatures above 1
Th
e transmitter fails to operate properly or provide the intended measurements
e transmitter must be installed by qualified personnel in accordance with relevant
codes and instructions contained in this user manual. Observe the Tran
specific
ations and relative parameter’s ratings
r
d
.
only to an
smitter’s
to
y
76F (80C)
2
TableofContents
1 Introduction ................................................................................................................... 4
2 Dimension Drawings ...................................................................................................... 4
2.1 Front and Side View ........................................................................................... 4
2.2 Installation ......................................................................................................... 4
2.2.1 Panel Installation Instructions ........................................................................ 4
2.2.1.1 Panel Cut-out .................................................................................................. 5
2.2.2 Field Mount Installation.................................................................................. 6
3 Specifications ................................................................................................................. 7
4 Electrical Connections .................................................................................................... 8
4.1 System Power & Loop Connections .................................................................... 8
4.2 Electrode Input Connections .............................................................................. 9
4.3 OC Output .......................................................................................................... 9
4.3.1 Open Collector Output Connections ............................................................... 9
4.3.2 Open Collector Output Operation ................................................................. 10
5 Menu ............................................................................................................................ 10
5.1 View Menu ........................................................................................................ 11
5.2 Editable Menu ................................................................................................... 11
5.2.1 Editing Procedure .......................................................................................... 11
5.2.2 Main Menu .................................................................................................... 11
5.2.3 Calibration Menu ........................................................................................... 12
5.2.4 Output Menu .................................. ... ... .................................... ... ... ... ... ... ... ... 12
5.2.4.1 Set 4~20mA Details ....................................................................................... 13
5.2.4.2 OC Output Details .......................................................................................... 13
5.2.5 Option Menu ................................................................................................. 14
6 Calibration ................................................................................................................. ... 15
6.1 Wet Calibration (1 Point Sample Method) ......................................................... 15
6.2 Dry Calibration (Simulates the Conductivity and Temperature) ......................... 15
6.2.1 Temperature Simulation ................................................................................ 15
6.2.2 Conductivity Simulation ...................................................... ... ... ... ... ... ... ... ... ... 16
6.3 Parts per Million (PPM) Factor ........................................................................... 16
7 Troubleshooting ............................................................................................................ 16
8 Ordering information .................................................................................................... 17
3
1 Introduction
The CX105 conductivity/resistivity transmitter is a 2-wire
transmitter designed for process conductivity/resistivity
monitoring, measurement and control applications. This user’s
manual contains the information needed to install, set up,
operate and maintain the transmitter.
2 Dimension Drawings
2.1 Front and Side View
Front view Side view
Panel Mount & Field Mount
2.2 Installation
The CX105 conductivity/resistivity transmitters are supplied with hardware to install as panel
mount or field(wall) mount.
2.2.1 Panel Installation Instructions
1) The panel mount version is designed for installation using a 1/4 DIN Punch (92mm(3.6in) x
mm(3.6in).
(92
2) Recommended clearance on all sides between instruments is 1 inch.
4
3) Slide the gasket over the back of the instrument.
ace the instrument into the panel cut-out.
4) Pl
5) Attach the mounting bracket to the back of the instrument by pulling apart the quick clips
and sliding it over the back of the instrument. Make sure that the quick clips are securely
attached to the latches.
6) Inspect the instrument to make sure that the instrument and the gasket are secured to
pan
el appropriately.
7) To disassemble, press the clips of the mounting bracket against the panel and pull th
trument away from the front.
ins
the
e
Panel mount installation detail schematic
2.2.1.1 Panel Cut-out
92mm
(3.6in.)
92mm
(3.6in.)
5
2.2.2 Field(Wall) Mount Installation
The field(Wall) mount version requires a wall mounting kit, which includes a plastic wall
mounting rear cover with gasket and 4 screws. This is included with your CX105 transmitter..
This makes it possible to install the transmitter on a variety of surfaces.
1) Place the gasket on the instrument
2) Thr
3) Connect the power, sensor and OC output wires.
4) Secure the wall mounting rear cover to the front enclosure with screws
5) Fix the w
ead electrical cables through the connectors on the wall mounting rear cover.
all mounting rear cover to the surface by using screws or cables.
.
.
Gasket
Front
enclosure
Field(wall) mount installation
6
3 Specifications
Display:
LCD: 128*65 dot matrix, figure or alphabet: 12x8, 28x15, 32x18, etc.
Update rate: 1 second
Contrast: User selected, 5 levels
Measurement:
Conductivity: 0.05 to 500,000 μS/cm
Resistivity: 1KΩ•cm to 18.3MΩ•cm
TDS: 0.023 to 200,000 ppm
Accuracy: ± 0.5% of reading
Repeatability*: ± 0.05% of span
Temperature : -10 to 70℃
*These performance specifications are typical at 25°C
Electrical:
Power: 19 -48VDC, regulated, 30mA maximum
Current Output:
Isolated 4-20 mA output with 0.004 mA (12-bit) resolution
Update Rate: 1 second
Maximum Loop Impedance: 250Ω@24V; 600Ω@31V; 1500Ω@48V
Memory:
Non-volatile: All user settings are retained indefinitely without battery backup
Open-Collector Output:
Isolated, 40 VDC max. pull-up voltage
The OC output can be configured to be one of three modes below:
High mode, Low mode, Proportional pulses
Ambient Conditions:
Operation: -10 °C to 70 °C (14 °F to 158 °F); 0-95% relative humidity, non-condensing
Transport/storage: -15°C to 80°C(5°F to 176°F); 0-95% relative humidity, non-condensing
Standards and Approvals
CE: Certified Compliant to European Community Standards.
7
4 Electrical Connections
4.1 System Power & Loop Connections
Standalone application, loop current isn’t used
P
ower Supply Transmitter Terminals
24VDC+ + 2 V+/Loop+
24VDC- - 1 V-/Loop-
Connection to a PLC with built-in power supply
PLC Terminals Transmitter Terminals
24VDC+ +
24VDC- -
4-20mA Loop Input -
4-20mA Loop Input +
2 V+/Loo
1 V-
/Loo
p+
p-
Con
4-20mA Loop Input -
4-20mA Loop Input +
4-20mA Loop Input - 2 V+/Loop+
4-20mA Loop Input + 1 V-/Loop-
nection to a PLC with separate power
tion
Op
A
ower Supply Transmitter Terminals
P
24VDC+ + 2 V+/Loop+
24VDC- - 1 V-/Loop-
PLC
Option B
C
PL
Power Supply
24VDC+ +
24VDC- -
supply
Transmitter Terminal
s
8
4.2 Electrode Input Connections
CAUTION:
• As electrical noise may interfere with electrode signal, please do not route the electrode cable in a
conduit containing AC power wiring.
Electrode Input Transmitter Ter min als
Drive Red 8 Drive
Ground Black 7 Ground
Temp Green 6 Temp
Temp White 5 Shield
Electrode Input
Drive
Ground
Tempm
p green
Tempm
p red
Drive
Ground
Tepmmp
green
Temmp
p red
black
white
coax center
Coax braid
wire colors in table to left
apply for all
sensors except
and CS615TC, CS620TC.
Wiring For CS615TC,
CS615TC
S855 cable used with
CS8000TC
CS8000TC
Transmitter Ter min als
8 Drive
7 Ground
6 Temp
5 Shield
Transmitter Ter min als
8 Drive
7 Ground
6 Temp
5 Shield
4.3 OC Output
4.3.1 Open Collector Output Connections
Connection to a PLC with built-in power supply
PLC
Power Supply+ +
100K
Connection to a PLC, separate supply
100K
Power Supply- - Transmitter Terminals
OC input+ + 4 O.C.+
OC input- - 3 O.C.-
Power Supply
24VDC+ +
24VDC- -
PLC Transmitter Terminals
OC input+ + 4 O.C.+
OC input- - 3 O.C.-
9
4.3.2 Open Collector Output Operation
The open collector out put can be used as a switch
or a warning that responds when the process value
moves above or below a set point, or it c an be used
to generate a pulsing signal w ith a rate pro porti onal
to the process value. The output can be disabled if
not used (select “OFF” in the OC OUTPUT menu).
The “parameter” mentioned below can be either
conductivity or temperature.
Low Mode:
In this mode, the OC output is only active when
the parameter is lower than a user set point.
utput will be inactive when th e param ete r value is
o
greater than the set point plus the hy ste res is
value.
High Mo
n this mode, the OC output is only active when
I
the parameter value is hi g her t ha n a u se r set poin
he output will be inactive when the paramete
T
alue is smaller than the set point minus th
v
ysteresis valu
h
P
In this mode, the OC output will generate a pulse sequence
at the rate defined by the setting in the OC OUTPUT menu.
In the following example, the starting point is
uency is 200 pulses/min:
freq
•The output will be 0 pulses/m in when the conductivity va lue is less than 10
• The output will be 100 pulses/min when the conductivity value is 60
• The output will be 200 pulses/min when the conductivity value is greater than 110
de:
e.
roportional Pulsing
The
r
e
10μS/cm, the end point is 110μS/cm, and the maximum
Value
N.O.
OC
:OC Output Active
OC
:OC Output Inactive
N.O.
Value
OC
N.O.
t.
:OC Output Active
OC
:OC Output Inactive
N.O.
μS/cm.
μS/cm.
μS/cm.
OC
OC
N.O.
OC
Low Setpoint
Hysteresis
Time
High Setpoint
OC
Hysteresis
N.O.
Time
5 Menu
The menu consists of a view menu and an editable menu. The menu has several levels, with the
view menu being at the topmost level. You can loop within the same level menu items by
pressing the UP or DOWN arrow keys, move to a lower level menu by pressing the ENTER key,
and move to an upper level menu by pressing the ESC key. At any time, the system will return to
the view menu (default display) if no key is pressed for 10 minutes.
During normal operation, the view menu is displayed. Use the UP or DOWN arrow keys to select
the information you want displayed. The items will scroll in a continuous loop. System operations
will not be interrupted during menu interaction.
10
5.1 View Menu
Display Description
Default display：
Cond μS/cm
109.55
28.2 ℃
All displays belo w are temporary. The system will return to the default display if no keys are
pressed in 10 minutes.
Monitors the conductivity and temperature input from t he
electrode.
The unit of conductivity or temperature is set in the
calibration menu.
Monitors the 4 to 20 mA loop output.
4~20mA Output
4.08 mA
5.2 Editable Menu
5.2.1 Editing Procedure
Step 1. Press and hold the ENTER key for 3 seconds to enter Main Menu:
If a password is required, enter the correct key code. The key code is entered by
pressing the RIGHT-DOWN-UP-DOWN keys in sequence.
The system will return to the view menu if no key is pressed for 10 minute
Step 2.
Step
NOTE：
ESC can be pressed at any time, and the system will exit the current level without saving.
The edited value is effective immediately after pressing the ENTER key
R
Navigating the menu with the UP and DOWN keys.
Once the selected menu is highlighted, press ENTER to edit the menu.
Only the highlighted item can be edited.
o parameters will be saved if the ESC key is pressed, and the display will return to
N
the previous menu
The
3. Press the ENTER key to save the new settings and return to Step 2.
epeat steps 2–3 as needed
system will return to the view menu if no activity occurs for 10 minute
.
.
.
s.
s.
5.2.2 Main Menu
CALIBRATION >
OUTPUT>
11
OPTIONS >
Press the UP or DOWN arrow keys to navigate the three items. Press the ENTER key to enter the
CALIBRATION menu, the OUTPUT menu, or the OPTIONS menu. Press the ESC key to return to
the view menu.
5.2.3 Calibration Menu
Display
Menu Item Next Level Menu
CEL
L>
1.00
Set Cell
01.00
COND UNIT >
μS/cm
TEMP UNIT >
μS/
UNIT >
cm ℃
℃
T
EMPERATURE >
20.0℃
C
ONDUCTIVITY >
μS/cm
M FACTOR >
PP
2.00
Set Temperature
+20.0 ℃
Set conductivity
9463.95μS/cm
Set PPM Factor
2.00
Description
Sets the cell constant of the conductivity electrode.
Sets the unit of conductivity/resistivity.
Options are:
μS/cm, mS/cm, kΩcm, MΩcm, PPM.
Sets the unit of Temperature. Options are :
℃,℉.
Sets the value of temperature.
Sets the value of conductivity.
Sets the PPM Factor. It can be any value from 0.01
to 99.99. The default value is 2.00.
5.2.4 Output Menu
Display
Menu Item Next Level Menu
4~20mA Source>
tput 4~20mA>
Ou
Output >
OC
CONDUCTIVITY
Set 4~20mA>
OC SOURCE>
CONDUCTIVITY
OC MODE>
12
Description
Sets either conductivity or temperature as the
source for the 4~20mA current loop output.
Sets the minimum and maximum
conductivity/temperature values for the 4~20mA
current loop output.
Selects conductivity or temperature as the source
for the open collector output.
See 4.3.2 open collector output operation; selects
PULSE
ext two sections (5.2.4.1 and 5.2.4.2) use conductivity as an example, but all of the
The n
the OC mode and relative parameters.
operations are the same for temperature.
5.2.4.1 Set 4~20mA Details
Menu Item Description
S
et 4mA Output>
Sets the conductivity value for 4mA current loop output.
000200. μS
Set 20mA Output>
Sets the conductivity value for 20mA current loop output.
200000.μS
5.2.4.2 OC Output Details
Display
Menu Item Next Level Menu
MIN SETPOINT>
0100.00μS/cm
MIN
ALARM
HYSTERESIS>
0020.00μS/cm
MAX SETPOINT>
0100.00μS/cm
HYSTERESIS>
MAX ALAR
M
0020.00μS/cm
RANGE>
000000.μS/cm
20
PULSE
0000μS/cm
PULSE RATE>
100 Pulse/min
As described in 4.3.2, sets the minimum point for
low mode. The OC output is active when the
conductivity value is less than the set value.
As described in 4.3.2, sets the hysteresis value for
low mode. The OC output is inactive when the
conductivity value is greater than the sum of the
minimum point and the hysteresis value.
As described in 4.3.2, sets the maximum point for
high mode. The OC output is active when the
conductivity value is greater than the set value.
As described in 4.3.2, sets the hysteresis for high
mode. OC output is inactive when the conductivity
value is less than the maximum point minus the
hysteresis value.
Note: the hysteresis must be less than the
maximum point.
As described in 4.3.2, sets the start point and end
point for pulse mode.
As described in 4.3.2, sets the maximum pulse rate
for pulse mode.
Description
13
5.2.5 Option Menu
Display Description
CON
TRAST >
Level 1
F
ILTER >
1S
COND
UCTIVITY
DECIMAL>
L
OOP ADJUST 4mA >
3.75
L
OOP ADJUST 20mA >
21.00
TE
ST 4~20mA
OUTPUT>
Adjusts the LCD contrast for optimal viewing. A setting of 1 is the
lowest contrast, while a setting of 5 is the highest.
Sets the time parameter for averaging input values. There are 8
options: 1S, 2S, 5S, 8S, 10S, 20S, 40S, and 60S.
Note
：
Larger filter values mean more stable displays but longer
response times. Please consider your system safety
requirements.
Sets the conductivity decimal. Six options are as below:
X.XXXXX; XX.XXXX; XXX.XXX; XXXX.XX; XXXXX.X; XXXXXX.
Adjusts the minimum current output to match the external
current measurement. Adjustable from 3.70 mA to 5.00 mA.
Adjusts the maximum current output to match the external
current measurement. Adjustable from 19.00 mA to 21.00 mA.
Press the UP and DOWN keys to manually select any output
current value from 3.7 mA to 21.00 mA to test the current loop
output. The value changes 0.01mA each time the UP/DOWN key
is pressed. If the UP/DOWN key is pressed and held for more
than 5 seconds, The value will be changed by 0.1mA
continuously.
TE
ST OC
OUTPUT>
PA
SSWOR D MENU>
OFF
RE
STORE FACTORY
SETTINGS>
Press the UP and DOWN keys to manually select the status of the
open collector output.
Selects whether or not the password is needed to enter the Main
Menu. Note: the password is input by pressing the
RIGHT-DOWN-UP-DOWN arrow keys in sequence and cannot be
changed.
Restores factory settings. In order to do so, you must enter the
correct key code. The key code is input by pressing the
RIGHT-DOWN-UP-DOWN arrow keys in sequence.
14
6 Calibration
CAUTION:
All calibration procedures must be performed b y traine d personnel. Incorrectly set parameters may go
unnoticed, but will still change the measurement properties.
6.1 Wet Calibration (1 Point Sample
Method)
The “wet” calibration method requires the user to immerse the electrode into a properly
prepared conductivity reference solution of known value, or to keep the electrode installed in the
process while obtaining a process sample. When keeping the electrode installed, determine the
process value through a laboratory analysis of comparable reading. In either case, enter the
correct reference solution or sample conductivity value. The procedure is as follows:
Step 1: Make sure the electrode is clean, and then immerse the electrode into solution. Stir
electrode in solution to ensure no bubbles.
Step 2: Wait for the temperature to stabilize. Depending on how great the temperatur
ference is, this may take up to 30 seconds
dif
ep 3: Set the temperature to the value reading from a precision thermometer.
St
Step 4: Set the conductivity to a value, which is either from a solution or read from a precise
instrume
Step 5: Place the electrode into a second different value solution, and verify the linearity. If
he transmitter does not display the correct value (temperature ± 0.5℃, conductivity ±2%
t
eading), contact Sensorex technical support.
r
nt.
e
.
of
6.2 Dry Calibration (Simulates the Conductivity and
Temperature)
The Dry Calibration method requires the user to simulate the conductivity and temperature by
using precise fixed resistors (± 0.1%). The calibration procedure is as follows.
6.2.1 Temperature Simulation
The temperature input to the CX105 is a PT-1000 RTD, where 1000 Ohms (Ω) is equal to 0 ℃
and a change of 3.85 Ω equals to 1℃ difference. (1000 Ω = 0 ℃, 1096 Ω = 25 ℃)
Step 1: Connect a resistor (1000 Ω to 1096 Ω) between the "Temp" and “Ground" terminal
St
ep 2: Set the temperature in the same manner as the wet calibration procedure.
Step 3: Connect a different value resistor to the "Temp" and “Ground" terminals, and ve
15
s.
rify
the linearity. If the transmitter displays an incorrect value (±0.5℃),contact Sensorex
technical support.
6.2.2 Conductivity Simulation
The following formulas will be useful for the user to simulate the conductivity and verify the
results and linearity.
resistance=
conductivity=
Step1: Connect a precise resistor between the "Drive" and “Ground" terminals.
Step 2: Set the conductivity in the same manner as the wet calibration proced
St
he linearity. If the transmitter displays an incorrect value (±2% of reading), contact Sensorex
t
technical support.
cell constant
conductivity
cell constant
resistance
ep 3: Connect a different value resistor to the "Drive" and “Ground" terminals, and ve
e.g.
e.g.
1.00cell
0.000010simens
1.00cell
100kΩ
=0.000010simens
=100kΩ
ure.
6.3 Parts per Million (PPM) Factor
rify
When the unit in the calibration menu is PPM, the following information is useful. The PPM factor
is a value between 0.01 and 99.99, and the default value is 2.00.
The formulas are:
PPM Factor=
TDS(PPM)=
TDS: Total Dissolved Solids.
For example：
When the solution conductivity = 1000µS/cm and TDS = 500ppm(mg/L), the PPM Factor is 2.00.
solution conductivity(µS/cm)
TDS(PPM)
solution conductivity(µS/cm)
PPM Factor
7 Troubleshooting
Display Possible Cause Suggestions
Value
Too Large (or Small)!
Cell
Can NOT
Be Zero!
HYSTERESIS Too Large
During temperature
calibration, the entered value
is more than 25 degree away
from the detected value.
Cell value is set to zero.
The HYSTERESIS is larger than
the MAX SETPOINT
1. Check the sensor and repeat
the calibration procedure.
2. Enter appropriate values
Cell value cannot be set to zero,
please set a value larger than zero.
Set the HYSTERSIS to a smaller
value than MAX SETPOINT.
.
16
Wrong Password The password is wrong. Enter the correct password.
8 Ordering information
Part No. Description
CX105 Conductivity/Resistivity Transmitter
AR100-11 Mounting Bracket for Transmitter, Panel Mount (included with CX105,
order when lost or damaged)
AR100-15 Transmitter Gasket (included with CX105, order when lost or damaged)
AR100-17 Mounting Kit for Transmitter, Field Mount (included with CX105,
order when lost or damaged)
17
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