SYCON 2602 – Limit value monitoring device for total hardness and carbonate hardness, colorimetric method, 3 relay outputs, color sensor with automatic zero adjustment, SD card, 9 languages
SYCON 2602 – Limit value monitoring for water hardness and carbonate hardness
Why does water hardness need to be monitored?
In water treatment, reliable monitoring of water hardness is a decisive factor for the protection of downstream systems and processes. Softening systems that work on an ion exchanger basis must be regenerated in good time before hardness-forming ions (calcium and magnesium) break through the exchanger. A breakthrough can lead to scaling in pipes, heat exchangers and steam boilers – with considerable consequential costs due to energy losses, production downtime and costly cleaning.
Limit value monitoring is also essential for the protection of reverse osmosis systems: if the permissible hardness in the feed water is exceeded, there is a risk of irreversible membrane damage due to scaling. The early detection of a hardness breakthrough enables immediate intervention – whether through a demand-controlled regeneration trigger or a safety shutdown of the downstream system.
What is the SYCON 2602?
The SYCON 2602 from RLS Wacon is a fully automatic online analyzer for limit value monitoring of total hardness or carbonate hardness (acid capacity KS 4.3) in process and industrial water. As an entry-level model in the SYCON series, it offers a reliable pass/fail assessment of water quality: the device checks whether the limit value set by the Reagent used is met or exceeded for each analysis and reports the result via up to three potential-free relay outputs.
In addition to the limit value status, the graphic color display also shows information such as analysis interval, indicator supply, device status and error history. The menu navigation is available in nine languages: German, English, French, Italian, Spanish, Russian, Polish, Dutch and Danish.
How does the SYCON 2602 work?
The SYCON 2602 works according to the principle of the colorimetric limit value method. For each analysis, a water sample is automatically fed into the measuring cell and the respective Reagent (H25 series for total hardness or C25 series for carbonate hardness) is added. A maintenance-free RGB full color sensor in combination with a white high-power LED evaluates the color change of the sample.
If the hardness of the sample water is below the Reagent limit value, the sample discolors – the result is “GOOD”. If there is no discoloration or it is too weak, the limit value is reported as exceeded (“BAD”) and relay 1 switches. After the measurement, the measuring cell is automatically flushed with line pressure so that no indicator residues affect the next analysis.
Before each measurement, the color sensor uses a zero sample to automatically compensate for ambient light, contamination and turbidity of the water sample. An integrated self-diagnosis with plausibility monitoring of the sensor data ensures additional operational reliability. All measurement results are automatically logged on an SD card.
BOB functionality – operation without supervision
The SYCON 2602 automatically monitors the indicator supply and signals via the configurable relay output 3 when the fill level is low. The BOB function (unattended operation) enables continuous, unattended operation for at least 72 hours – with an indicator consumption of less than 0.1 ml per analysis and at least 5,000 analyses per 500 ml bottle, operation is possible for weeks without refilling.
Advantages of the SYCON 2602
Reliable limit value monitoring for total hardness and carbonate hardness
Automatic good/bad evaluation with immediate alarm via relay output
11 limit values for total hardness, 4 for carbonate hardness
From 0.02 to 10 °dH (total hardness) and 1 to 3 °dH (carbonate hardness) – suitable for every application
Full color sensor with automatic zero adjustment
Zero sample before every measurement – automatic compensation for ambient light, contamination and turbidity, no manual calibration needed
Very low indicator consumption
Less than 0.1 ml per analysis – at least 5,000 analyses per 500 ml bottle
Simple commissioning using the installation wizard
Step-by-step guidance on the graphic display – even without prior knowledge
3 potential-free relay outputs
Limit value alarm, device fault and analysis active / BOB message / indicator fill level – freely configurable
Low maintenance effort
Peristaltic pump technology and automatic flushing of the measuring cell with line pressure – Maintenance set every 2 years or 30,000 analyses
9-language graphic display
DE, EN, FR, IT, ES, RU, PL, NL, DK – ideal for international use
SD card for measured value logging
Complete documentation of all analysis results with time stamp
Compact design – wall bracket or housing
274 × 275 × 129 mm (wall bracket IP43) or 332 × 345 × 190 mm (housing IP54)
Field of application
The SYCON 2602 is used wherever reliable limit value monitoring of water hardness or carbonate hardness is required:
Area of application
Description
Softening systems
Demand-controlled regeneration triggering in the event of hardness breakthrough – the relay output for limit value exceedance can directly start the regeneration of the ion exchanger system
Reverse osmosis systems
Protection of the membranes against scaling due to excessively hard feed water – if the limit value is exceeded, the system can be switched off via the relay output
Steam boilers and heating systems
Feed water monitoring to prevent limescale deposits in pipes, heat exchangers and boilers
Cooling water circuits
Control of the water hardness in the circulating water to prevent deposits and corrosion
Pendulum softening systems
Interval reset via the digital input enables synchronization with the changeover valve
Requirements for the sample water
Parameters
Requirement
pH value
4-10
Iron (Fe)
< 3 ppm
Copper (Cu)
< 0.2 ppm
Aluminum (Al)
< 0.1 ppm
Manganese (Mn)
< 0.2 ppm
Acid capacity KS 4.3
< 5 mmol/l
Properties
Clear, colorless, free of solids, free of gas bubbles
Oxidizing agents
Chlorine, ozone etc. above the drinking water limit values interfere with the measurement – activated carbon pre-filter recommended
Installation and commissioning
Mount the appliance on a dry, easily accessible wall – upright, with free access to the drain
Make water connections: Inlet and outlet via 6 mm outer diameter hose, free short outlet required
Make electrical connections via the cable glands (5 pieces): Supply voltage, relay outputs, digital input
Insert the Reagent of the H25 series (total hardness) or C25 series (carbonate hardness) and insert the suction lance
Start the installation wizard in the menu – this guides you step by step through all settings (language, date/time, analysis interval, Reagent)
Start the first analysis run and check the result
Tip for the installation
The recommended inlet water pressure is 1-2 bar. For higher line pressure, use the optional pressure regulator with pressure gauge (item no. in accessories). For sample water temperatures above 40 °C, a sample cooler (AC 100 or AC 400) is mandatory. In this case, the third relay can be configured to control the cooling water valve.
Important notes
The device is intended exclusively for indoor use and wall mounting in an upright position
A compatible Reagent from the H25 or C25 series is required for operation
The drain must be free and short – no back pressure on the drain
Oxidizing agents (chlorine, ozone) above the drinking water limit values affect the measurement – an activated carbon pre-filter is recommended
Install maintenance set (item no. 33-090028) every 2 years or 30,000 analyzes
Clean the measuring cell every 6 months – use SYCON Clean (item no. 30-010900)
Measuring range and Reagents
The SYCON 2602 enables the monitoring of a limit value (H25 for total hardness or C25 for carbonate hardness).
The limit value to be monitored depends on the Reagent used.
Limit values for total hardness (H25):
Reagent
Item number
Limit value
Single bottle
Value pack
°dH
°f
ppm CaCo3
°e
H25-0,02
32-084115
32-484115
0,02
0,04
0,4
0,03
H25-0,05
32-084125
32-484125
0,05
0,1
1
0,06
H25-0,1
32-084135
32-484135
0,1
0,2
2
0,13
H25-0,2
32-084145
32-484145
0,2
0,4
4
0,25
H25-0,3
32-084155
32-484155
0,3
0,6
6
0,38
H25-0,5
32-084165
32-484165
0,5
1,0
10
0,63
H25-1
32-084175
32-484175
1
2,0
20
1,25
H25-2
32-084185
32-484185
2
4,0
40
2,5
H25-3
32-084195
32-484195
3
6,0
60
3,8
H25-5
32-084205
32-484205
5
10
100
6,3
H25-10
32-084215
32-484215
10
20
200
12,6
Limit values for carbonate hardness (C25):
Reagent
Item number
Limit value
Single bottle
Value pack
°dKH
°f
ppm CaCo3
C25-1
32-086125
32-486125
1
2
20
C25-1,5
32-086135
32-486135
1,5
3
30
C25-2
32-086145
32-486145
2
4
40
C25-3
32-086155
32-486155
3
6
60
Specifications at a glance
Property
Value
Measuring principle
Colorimetric limit value method
Parameters
Total hardness (H25 series) or carbonate hardness (C25 series)
Measuring range total hardness
0.02-10 °dH (11 Reagents)
Measuring range carbonate hardness
1-3 °dH (4 Reagents)
Accuracy
± 10 % of the limit value of the Reagent used
units
°dH, °f, ppm CaCO₃, mmol/l, °e, °Zh
Duration of analysis
approx. 5 minutes
Indicator consumption
< 0.1 ml per analysis
Analysis per 500 ml bottle
min. 5.000
Water consumption
approx. 1 l per analysis at 2 bar
Durability Reagent
at least 2 years (stored at < 25 °C, in the dark)
Electrical data
Property
Value
Supply voltage (230 V version)
100-240 V AC, 50/60 Hz
Supply voltage (24 V version)
21.6-26.4 V AC/DC, 50 Hz
Power consumption
max. 25 VA / 8 VA measurement mode / 3.5 VA standby
Fuses (230 V version)
2 A slow-blow + 400 mA slow-blow (5×20 mm)
Fuses (24 V version)
2 A slow-blow + 1 A slow-blow (5×20 mm)
Relay outputs
3 relays, max. 250 V AC/DC, 4 A, potential-free changeover contacts (NC/NO)
Relay 1
Limit value exceeded
Relay 2
Device fault
Relay 3
Configurable: Analysis active (with delay timer) or Reagent level warning (BOB)
Digital input
1× galvanically isolated – external analysis start, water meter or flow monitor
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