ICON ProCon C500 Series User manual

C500 |C520 Series Controller
Conductivity |TDS |Resistivity |Salinity
Operating Manual

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Contents
Preface .........................................................................................................................................................................................................................................3
Features...........................................................................................................................................................................................................................................3
Technical Specications ...................................................................................................................................................................................................... 4
Typical Application.................................................................................................................................................................................................................. 4
Instrument Connection........................................................................................................................................................................................................5
Dimension......................................................................................................................................................................................................................................6
Instrument Installation .........................................................................................................................................................................................................6
Slim Line Wall Mount Bracket..........................................................................................................................................................................................7
Display Descriptions ...............................................................................................................................................................................................................8
Keypad Descriptions...............................................................................................................................................................................................................8
Menu Structure ..........................................................................................................................................................................................................................9
Factory Calibration.................................................................................................................................................................................................................. 11
Factory Default Current Outputs................................................................................................................................................................................. 12
Calibration.................................................................................................................................................................................................................................... 12
Field Calibration .......................................................................................................................................................................................................................13
Calibration.................................................................................................................................................................................................................................... 13
Measurement Settings (Quick Start).........................................................................................................................................................................15
Temperature Calibration....................................................................................................................................................................................................16
Point Calibration......................................................................................................................................................................................................................17
Field Calibration .......................................................................................................................................................................................................................18
Relays ..............................................................................................................................................................................................................................................19
4-20mA Ouput.........................................................................................................................................................................................................................20
RS485 Modbus..........................................................................................................................................................................................................................21
System Setup............................................................................................................................................................................................................................ 22
MODBUS RTU General Information.......................................................................................................................................................................... 23
MODBUS RTU Transmission Mode ............................................................................................................................................................................24
MODBUS RTU CRC Check ............................................................................................................................................................................................... 25
Implementation of MODBUS RTU in Instrument .......................................................................................................................................... 25
Data Format...............................................................................................................................................................................................................................27
Read Instruction Mode ......................................................................................................................................................................................................29
Daily Maintenance ................................................................................................................................................................................................................29
Troubleshooting......................................................................................................................................................................................................................30
Warranty.......................................................................................................................................................................................................................................30

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Preface
Please read this manual carefully before use.
When receiving the instrument, please open the package carefully, check whether the instrument and accessories are damaged by trans-
portation and whether the accessories are complete. If any abnormalities are found, please contact our after-sales service department or
regional customer service center, and keep the package for return processing.
This instrument is an analytical measurement and control instrument with highly precision.Only skilled,trained or authorized person should
carry out installation, setup and operation of the instrument.Ensure that the power cable is physically separated from the power supply
when connection or repair. Once the safety problem occurs, make sure that the power to the instrument is off and disconnected.
For example,
1. Apparent damage to the analyzer
2. The analyzer does not work properly or provides specied measurements
3. The analyzer has been stored for a long time in an environment where the temperature exceeds 70°C
The analyzer must be installed by licensed professionals in accordance with relevant local specications, and instructions are included in
the operation manual. Comply with the technical specications and input requirements of the controller.
Features
The instrument is equipped with different types of pH or ORP sensors. Widely used in power plants, petrochemical industry, metallurgical
electronics, mining, paper industry, biological fermentation engineering, medicine, food and beverage, environmental protection water
treatment, aquaculture, modern agricultural planting and other industries. The pH (acidity and alkalinity) value, ORP (redox potential) value
and temperature value of water solution were continuously monitored and controlled.
Large color LCD display
Intelligent menu operation
Data recording / curve display
Multiple automatic calibration
Manual and automatic temperature compensation
Three (3) relay control switches
4-20mA & RS485 multiple output modes
Multi-parameter display simultaneously shows conductivity and temperature
Password protection

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Technical Specifications
Measuring Range 0 – 500µS/cm
Resolution 0.1µS/cm |0.01mS/cm
Intrinsic Error ±0.5% F.S
Resistivity 0 – 18.25MΩ/cm
Resolution 0.01KΩ/cm | 0.01MΩ/cm
TDS 0 – 250g/L
Resolution 0.01mg/L |0.01g/L
Salinity 0 – 700ppt
Resolution 0.01ppm |0.01ppt
Working Temperature 32 – 302°F | 0 – 150°C
Temperature Compensation Automatic or Manual
Outputs Two (2) 4–20mA |20–4mA |0–20mA
Communication RS485 MODBUS RTU
Relay Control Contact 5A 240VAC |5A – 28VDC
Power Supply 9 – 36VDC (std) |85 – 265VAC | Power Consumption 3W
Environmental Temperature 14 – 140°F | -10 – 60°C
Relative Humidity ≤ 90%
Enclosure Rating IP65
Weight 0.7kg
Dimensions 144 × 144 × 118mm
Installation Opening Size 138 × 138mm
Installation methods Panel |Pipe |Wall
Other functions Data record & Curve display
Typical Application
Conductivity / TDS / Salinity / Resistivity
2023-01-09 12:53:17
83.01
µS/cm
SP1 SP3SP2
14.51 mA
C1
25.0 °C
M ENU C AL
E SC E NT
I NFO I NFO
R

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Instrument Connection
REF2
V+ V- A1 B1 V+ V- A2 B2
I1 G I2 A3 B3
T2+ T2-
EC1 EC2 EC3 EC4 RLY3 RLY2 RLY1 L N
G TX RX P+ P-
REF1
INPUT1
TEMP1 TEMP1
SEN-
SEN+
INPUT2
TEMP2
TEMP2
GND
CE
RE
WE
V+, V-, A1, B1 Sensor Input channel 1
V+, V-, A2, B2 Sensor Input channel 2
I1, G, I2 Current Output
A3, B3 RS485 Communication Output
G, TX, RX RS232 Communication Output
P+, P DC Power
T2+, T2- Temperature Connection
EC1, EC2, EC3, EC4 Conductivity | Resistivity Connection
RLY3 RLY2 RLY1 Three Relays
L,N, Communication Terminal L-Live wire, N-Neutral wire, -Earth wire
REF1 pH/Ion Reference 1
INPUT1 pH/Ion Measurement 1
TEMP1 Temperature 1
SEN-, SEN+ Membrane Dissolved Oxygen | Residual Chlorine
REF2 pH Reference 2
INPUT2 pH Measurement 2
TEMP2 Temperature 2
GND Ground Connection (used for testing)
CE,RE,WE Potentiostatic Residual Chlorine | Chlorine dioxide | Ozone

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Dimension
Instrument Installation
1. Cable (Recommended stripping length for cables is at least 90mm, please use 0.5 to 1 square meter wire)
2. Cable ties
3. Waterproof cable glands

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Slim Line Wall Mount Bracket

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Display Descriptions
Check all pipe connections and electrical connections before use. The instrument will display as shown in the gure below after the power
is turned on.
83.01 µS/cm
ATC
25.0
°C
2023-11-09 12:53:17
Conductivity / TDS / Salinity / Resistivity
14.51 mA
Measurement + Unit Year / Month / Day
Sensor Communication
Warning
Time : Minutes:Seconds
Relay 1 - Blue is Off
Relay 2 - Red is On
Relay 3
Instrument type
mA 1
mA 2
Sensor Cleaning Symbol
Temp.°F °C
Automatic Temp Compensation
1000Ω
Measurement Mode Programming Mode
Calibration Mode
Note: New Sensors are Factory Calibrated Data Logging Trend Chart
2023-01-09 12:53:17
Calibration
Set points
Output
History
System
25.0 °C
83.01 µS/cm
2023-01-09 12:53:17
2023-01-09 12:53:17
Voltage:-5 mV
Calibrating
Point 2
1413 µS/cm
20
16
12
8
4
050 100 15 0 200 250 300 350 400
2023-01-09 12:53:17
2021-11-09 12:53:17 1200 µS/cm 25.0 °C
Conductivity / TDS / Salinity / Resistivity
Conductivity / TDS / Salinity / Resistivity
Conductivity / TDS / Salinity / Resistivity
Conductivity / TDS / Salinity / Resistivity
Keypad Descriptions
1. Enter Calibration Mode
2. Check Calibration Status
Main Menu Return to Previous Menu Cursor Right / Display Trend Chart
Cursor Down / Info Confirm Selections

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Menu Structure
Press [MENU] key to enter programming mode:
If the monitor prompts you to enter the calibration security password, press the or key to set the calibration security
password, and then press the [ENT] key to conrm the calibration security password. No initial password here, please enter directly by
pressing the [ENT]
Item Display Selection Sub Menu
Congure
Sensor
Type
EC
TDS
Salinity
Resistivity
Unit
µS/cm
mS/cm
ppm
ppt
%
Electrode Constant 1.0 (Default, can be modied)
Temperature Coefcient 2.0 (Default, can be modied)
Temperature
Temperature Sensor
NTC2.252 kΩ
NTC10 kΩ
Pt100
Pt1000 (Default)
Temperature Offset 0.0000 (Enter Value if Required)
Temperature Input
Automatic
Manual
Temperature Unit
°C
°F (Default)
Calibration
Standard
Solution
Calibration
Calibration Point 1 0.01 μS/cm/cm (Default, can be modied)
Calibration Point 2 1413mS/cm (Default, can be modied)
Calibration Point 3 12.88mS/cm (Default, can be modied)
Calibration Point 4 111mS/cm (Default, can be modied)
Calibration Point 5 800 mS/cm (Default, can be modied)
Calibration Adjustment
Voltage 1 (Default: 00.010)
Voltage 2 (Default: 1413)
Voltage 3 (Default: 012880)
Voltage 4 (Default: 149812)
Voltage 5 (Default: 800000)
Field Calibration
Field Calibration 00.010 (Default)
Offset Adjustment 00.000 (Default)
Slope Adjustment 01.000 (Default)

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Item Display Selection Sub Menu
Set Points
Relay 1
Status ON
OFF
High/Low Setpoint
High Alarm
Low Alarm
Clean
Limit Value 00.00 (Default, can be modied)
Hysteresis 00.000 (Default, can be modied)
Relay 2
Status ON
OFF
High/Low Setpoint
High Alarm
Low Alarm
Clean
Limit Value 00.00 (Default, can be modied)
Hysteresis 00.000 (Default, can be modied)
Relay 2
Status ON
OFF
High/Low Setpoint
High Alarm
Low Alarm
Clean
Limit Value 00.00 (Default, can be modied)
Hysteresis 00.000 (Default, can be modied)
Output
Current 1
Channel Main
Temperature
Output Option
4-20mA (Default)
0-20mA
20-4mA
Upper Limit 00.00
Lower Limit 00.00
Current 2
Channel Main
Temperature
Output Option
4-20mA (Default)
0-20mA
20-4mA
Upper Limit 00.00
Lower Limit 00.00
Output RS485
Baud Rate
4800BPS
9600BPS (Default)
19200BPS
Parity Check
None
Odd
Even
Stop Bit 1 Bit
2 BIT
Network Node 000001

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Item Display Selection Sub Menu
Data Log
Graphic Trend
(Trend Chart)
Record Interval
Display according to interval settings
480 points/screen
1h/point
12h/point
24h/point
Record Query Record Interval Year/Month/Day,
Time: Minutes/Seconds Value Unit
Record Interval
7.5s
90s
180s
Data Output
Upload Data
System
Language English
Date/Time Year-Month-Day Current Date (Default)
Hour-Minute-Second EST (Default)
Display
Display Speed
Low
Standard (Default)
Medium
High
Backlight Power Saving [Enter Value]
Long Bright
Information
Soft Version 19-1.0
Password Settings 0000
Serial Number
Factory Default No Keep User Settings
Yes Reset back to Factory Default
Factory Calibration
ProCon®conductivity sensors come with a factory default that covers the range of the sensor
C250: 0 – 2µS
C250: 0 – 10µS
C 350: 0 – 20µS
C450, C650, C950: 0 – 100µS
C 350: 0 – 200µS
C450, C650, C950: 0 – 1,000µS
C 350: 0 – 2,000µS
C450, C550, C650, C950: 0 – 10,000µS
C450, C650, C950: 0 – 200,000µS
C554, C850: 0 – 500,000µS
C750: 0 – 2,000mS
Acids | AlkaliesIndustrial WaterPharma H2O
▲
0
18.2 MΩ
▲
2µS
▲
10µS
Potable H2O
▼
◀ 50,000µS◀ 1,000µS◀ 0µS
Ultra-pure
H2O @ 72°F
▼
▲
200µS
▲
2,000µS
▲
10,000µS
▲
200,000µS
▲
500,000µS
▲
2,000mS
Sea Water
▼
▲
20µS
▲
100µS
▲
1,000µS

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Factory Default Current Outputs
Cell Models Range
Cell 0.01 C250 0 – 2µS
Cell 0.01 C250 0 – 10µS
Cell 0.1 C350 0 – 20µS
Cell 0.01 C450, C650, C950 0 – 100µS
Cell 0.1 C350 0 – 200µS
Cell 0.1 C450, C650, C950 0 – 1,000µS
Cell 0.1 C350 0 – 2,000µS
Cell 1.0 C450, C550, C650, C950 0 – 10,000µS
Cell 10 C450, C650, C950 0 – 200,000µS
Cell 0.4 C554, C850 0 – 500,000µS
Toroidal C750 0 – 2,000mS
Calibration
Press [MENU] to enter the calibration menu and select
Calibration
Standard Calibration
Calibration Point 1 Enter given standard liquid value: Defa
Calibration Point 2 Enter given standard liquid value (Example: 84μS/cm)
Calibration Point 3 Enter given standard liquid value (Example: 1413μS/cm)
Calibration Point 4 Enter given standard liquid value (Example: 12.88mS/cm)
Calibration Point 5 Enter given standard liquid value (Example: 111mS/cm)
Field Calibration
Field Calibration Enter Value
Offset Adjustment Enter Value
Slope Adjustment Enter Value
Calibration of Standard Solution
The sensor has been factory calibrated before delivery and users can use it directly.
Note: Calibration if required can be made using at least one of the ve calibration points. Not all points are
required for sensor calibration
If calibration is required, prepare a suitable standard reference liquid with known range value. Press the [MENU] button to enter the
Setting Mode — select the calibration point.
Enter the corresponding reference calibration value, then press [ENT] key to conrm and enter the calibration screen.
(If the instrument has been calibrated, the screen shows the calibration status. press the key to switch the calibration state of the
calibration point. If re-calibration is required in this mode, press the [ENT] key again to enter the re-calibration.)
In the standard solution calibration mode, press the key to switch the calibration points, press the [ENT] key to start calibrating.
If prompted to enter the calibration security password, press the key or key to set the calibration security password, and
then press the [ENT] key to conrm the calibration security password.
Voltage: Point 1
0µS/cm Done
-5 mV
Conductivity / TDS / Salinity / Resistivity
Calibrating
Calibration Sensor Voltage
Successful Calibration

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Calibration point 1: After entering the calibration mode, the current measurement value will be displayed. This is known as the standard
solution value.
Place the electrode into the standard solution of the corresponding value, and the corresponding voltage mV value and calibration state
will be displayed on the screen.
After completion of calibration, Done will be displayed on the right side of the screen.
If you want to calibrate the next point, press the key to switch the calibration point.
If only one point calibration is required, press the [MENU] key to return to the superior menu after calibration.
During the calibration process, the calibration status will be displayed on the right side of the screen. Done indicates successful calibration,
Calibrating indicates in calibration, and Error indicates a sensor or a calibration issue.
Field Calibration — Select on-site calibration methods: [Linear calibration] , [Offset adjustment] , [linear adjustment].
Field Calibration
When the data from laboratory or portable instrument are input
into this item, the instrument will automatically correct the data.
Conductivity / TDS / Salinity / Resistivity
pH / ORP
µS/cm: 07.00
Vol: -002
Temp: 25.0 °C
Slope: 00.984
Field Calibration
Calibrating Done
Offset adjustment
Compare the data of laboratory or portable instrument with the data of instrument measurement,if there are errors, the error data can be
modied by this function.
Linear adjustment
Linear values after “eld calibration” are stored in this item, with factory data of 1.00. The main value of the instrument displays the known
standard liquid value point.
Place the electrode into the standard solution of the corresponding value, and the corresponding voltage mV value and calibration state
will be displayed on the left side of the screen.
After completion of calibration, Done will be displayed on the right side of the screen. If the next point is calibrated, press to switch
the calibration point.
If only one point calibration is needed, after the calibration is completed, press [MENU] to exit. During the calibration process, when the
standard solution is wrong, the screen will show an Error.
Calibration
Press [MENU] to enter the setting mode,set the recording interval, and the instrument will
Data Log
Graphic Trend
(Trend Chart)
Interval/point 400 points per screen,displays the most recent data trend graph
according to interval Settings
1h/point 400 points per screen, display trend chart of the last 16 days of data
12h/point 400 points per screen, display trend chart of the last 200 days of data
24h/point 400 points per screen, display trend chart of the last 400 days of data
Data Query Year/Month/Day Year/month/day time: minute/second value unit
Interval Enter
Frequency of Data
Collection
7.5s Store data every 7.5 seconds
90s | 1.5 minutes Store data every 90 seconds |1.5 Minutes
180s |3 minutes Store data every 180 seconds |3 Minutes

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Press [MENU] to bring you back to the measurement screen, and press the [TREND] button in the measurement mode to directly
view the TREND chart of the saved data, 400 sets of data records per screen.
Data Logging Trend Chart
20
16
12
8
4
050 100 15 0 200 250 300 350 400
2023-01-09 12:53:17
2021-11-09 12:53:17 1200 µS/cm 25.0 °C
Conductivity / TDS / Salinity / Resistivity
Under the current mode, press the [ENT] key to display the left and right displacement data line (red), and long press the [ENT] key
to accelerate the displacement.
When the bottom icon [ENT] is in green, it is the movement direction of the key. Press to switch the displacement
direction, and press to switch the display range (enlarge/shrink).
Item Display Selection Sub Menu
System
Terminal Current
Tuning
Current 1: 4mA (The positive and negative ends of the
multi-meter are connected to the current
1 or current 2 output terminals of the
instrument key respectively, press
key to adjust the current 4mA or 20mA ,
press [ENT] to conrm.)
Current 1: 20mA
Current 2: 4mA
Current 2: 20mA
Relay Test
Relay 1 — Testing
Press [ENT] to test
Relay 2 — Testing
Relay 1
Pump/Valve
Relay 2
Pump/Valve
Relay
Alarm/Cleaning
4-20mA
4 wire
Conductivity
Sensor 1
Conductivity
Sensor 1
Conductivity
Sensor 2
No Conductivity
Module Required
Relay 1
Pump/Valve
Relay 2
Pump/Valve
Relay
Alarm/Cleaning
4-20mA
4 wire
No Conductivity
Module Required

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Measurement Settings (Quick Start)
Configure
Temp Constant
Unit
Type
Salinity
Resistivity
TDS
EC
PPM
PPT
%
ms/cm
µS
Sensor
Press MENU key
Press ENT key
Select [Type]
Press key
0000
Enter Value
Electrode Constant
TDS
0000
Enter Value
Cell Constant
Press
ENT key
for Save
Press
ESC key
for Back
Press
ENT key
for Save
Press
ESC key
for Back
Press
ENT key
for Save
Press
ESC key
for Back
Press
ENT key
for Save
Press
ESC key
for Back
Press ENT keyPress ENT key
Select [Configure]
Press key
Select [Sensor ]
Press key
Select
[Item]
Press
key
Press ENT key
Select [Electrode Constant]
Press key
Press ENT key
Select [Electrode Constant]
Press key
Press ENT key
Select [Unit]
Press key
Select
[Item]
Press
key
Select
[Item]
Press
key
Select
[Item]
Press
key
Units of Measurement
EC
EC
TDS
Salinity
Resistivity
µS
ms/cm
PPM
PPT
%

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Temperature Calibration
Configure
Temp Unit
Temp Offset
Temp Sensor
PT100
PT1000
NTC 10K
NTC2.252Sensor
Press MENU key
Press ENT key
Select [Temp Sensor]
Press key
Temp Input Auto
Manual
Press
ENT key
for Save
Press
ESC key
for Back
Press
ENT key
for Save
Press
ESC key
for Back
Press ENT key
Select [Configure]
Press key
Temperature
Press ENT key
Select [Temperature]
Press key
Press ENT key
Select [ Temp Input ]
Press key
Press ENT key
Select [Temp Unit]
Press key
Press ENT key
Select [Temp Offset]
Press key
Select
[Item]
Press
key
0000
Enter Value
Press
ENT key
for Save
Press
ESC key
for Back
Select
[Item]
Press
key
Select
[Item]
Press
key
: Default
: Default
°C
°F
Press
ENT key
for Save
Press
ESC key
for Back
Select
[Item]
Press
key

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Point Calibration
Point 4
Point 2
Point 1Std Cal
Press MENU key
Press ENT key
Select [Point 1]
Press key
Point 3
Calibration
Configure
Press ENT key
Select [Calibration]
Press key
Press ENT key
Select [Std Cal]
Press key
Press ENT key
Select [ Point 3 ]
Using Press key
Press ENT key
Select [ Point 4 ]
Using Press key
Press ENT key
Select [Point 2]
Press key
0000
Enter Value
Press ENT key
for Save
Press
ESC key
for Back
Calibrating
Select Value
0000
Enter Value
Press ENT key
for Save
Press
ESC key
for Back
Calibrating
Select Value
0000
Enter Value
Press ENT key
for Save
Press
ESC key
for Back
Calibrating
Select Value
0000
Enter Value
Press ENT key
for Save
Press
ESC key
for Back
Calibrating
Select Value

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Field Calibration
Offset
Field Cal
Press MENU key
Press ENT key
Select [Point 1]
Press key
Slope
Calibration
Configure
Press ENT key
Select [Calibration]
Press key
Press ENT key
Select [ Point 3 ]
Press key
Press ENT key
Select [Point 2]
Press key
Std Cal
Field Cal
Press ENT key
Select [Temperature]
Press key
0000
Enter Value
Press ENT key
for Save
Press
ESC key
for Back
Calibrating
Select Value
0000
Enter Value
Press ENT key
for Save
Press
ESC key
for Back
Calibrating
Select Value
0000
Enter Value
Press ENT key
for Save
Press
ESC key
for Back
Calibrating
Select Value

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Relays
Hysteresis
High Low Set
StatusRelay 1
Press MENU key
Press ENT key
Select [Status]
Press key
Limit Value
Set points
Calibration
Configure
Press ENT key
Select [Set Points]
Press key
Relay 2
Press ENT key
Select [Relay]
Press key
Press ENT key
Select [ Limit Value ]
Press key
Press ENT key
Select [Hysteresis]
Press key
Press ENT key
Select [High Low Set]
Press key
OFF
On
Press
ENT key
for Save
Press
ESC key
for Back
Select
[Item]
Press
key
Low Alarm
High Alarm
Press
ENT key
for Save
Press
ESC key
for Back
Select
[Item]
Press
key
or
0000
Enter Value
Press
ENT key
for Save
Press
ESC key
for Back
Select
[Item]
Press
key
0000
Enter Value
Press
ENT key
for Save
Press
ESC key
for Back
Select
[Item]
Press
key

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4-20mA Ouput
Upper Limit
Output OptCurrent 1
Press MENU key
Press ENT key
Select [Output Opt]
Press key
Lower Limit
Set points
Output
Calibration
Configure
Press ENT key
Select [Output]
Press key
Current 2
Press ENT key
Select [Current]
Press key
Press ENT key
Select [ Lower Limit ]
Press key
Press ENT key
Select [Upper Limit]
Press key
0-20mA
20-4mA
4-20mA
Press
ENT key
for Save
Press
ESC key
for Back
Select
[Item]
Press
key
0-20mA
Press
ENT key
for Save
Press
ESC key
for Back
or
20-4mA
Press
ENT key
for Save
Press
ESC key
for Back