Treatment of cooling water in evaporation cooling systems - VDI 2047 and 42-compliant Federal Immission Control Ordinance (BImSchV)-compliant
The AEGIS II records all the necessary measuring parameters for cooling water treatment and controls the functions necessary for smooth operation:
- Measures the electrolytic conductivity – controls bleeding
- Biocide metering – time-dependent or as measurement and control, VDI 2047 and 42-compliant. Federal Immission Control Ordinance (BImSchV)-compliant (e.g. chlorine)
- Corrosion measurement – determines whether enough corrosion inhibitor is being metered
- pH measurement – measures and controls the pH value
Your benefits
- Control of biocide metering over 1, 7 or 28 days, real-time clock
- If desired, the biocide concentration can be measured and controlled online
- Measurement of conductivity, temperature and flow control with the CTFS type digital sensor
- Serial web interface for unit configuration and remote maintenance with e-mail alarms (the controller must be connected to the Internet for e-mail alarms). WiFi as an option
- Forced bleeding: performs bleeding before biocide metering, based on time or measured values
- Bleed lock: blocks bleeding after biocide metering has taken place
Field of application
The following list of applications are general examples of generally suitable applications for this product. Please contact your local sales representative to talk about the applicable use of this product in your specific case / environment.
- Control of bleeding in evaporation cooling systems
- Volume-proportional control or regulation of the metering of corrosion inhibitors, de-foamers and dispersants
- Measurement and control of the inhibitor concentration through the use of a fluorescence sensor
- Measurement and optionally control of the pH value and ORP voltage
- Metering of biocides, based on time or measured values
Technical Details
- 8 digital inputs for contact water meter, flow detector and control signals
- 10 status LEDs display the operating status
- 9 flexible relay outputs: for setpoint-dependent flow volume-proportional or time-based control of actuators
- Measured variables: conductivity, pH, ORP, chlorine, bromine, chlorine dioxide and more
Technical Data
|
Measuring range | Conductivity:
With digital sensor CTFS via serial module D1: 0.1 - 10 mS/cm
Via conductivity module L3 depending on sensor used (LMP, LFT): 50 µS/cm - 20 mS/cm
Via mA module AA with the inductive conductivity sensor ICT: 8 to 2 mS/cm, 20 mS/cm, 200 mS/cm Connection type mV:
pH: 0.00 ... 14.00
ORP: -1,500 ... +1,500 mV Type of connection mA (amperometric measured variables, measuring ranges according to sensors, 2 ppm, 10 ppm):
Chlorine
Chlorine dioxide
Bromine Temperature:
Via Pt 100/Pt 1000, measuring range 0 ... 150 °C |
Resolution | pH: 0.01
ORP voltage: 1 mV
temperature: 0.1 °C
amperometric analysis (chlorine etc.): 0.001/0.01 ppm, 0.01 vol.%, 0.1 vol.% |
Inputs and outputs | 3 plug-in module slots for 2-channel plug-in modules according to identity code
1 input for any analogue signals
5 output relays acting as changeover contacts, of which 3 are potential-free and 2 are AC/DC
4 pulse frequency outputs for controlling metering pumps
2 serial sensor inputs for CFTS conductivity sensors and CRS corrosion sensors
8 digital control inputs for contact water meter, flow switch and pause for locking |
Accuracy | 0.3% based on the full-scale reading |
Temperature compensation | Pt 100/Pt 1000 for pH |
Control characteristic | P/PID control |
Electrical Connection | 90 – 253 V, 50/60 Hz, 25 VA, 24 V DC |
Field bus connection | Modbus RTU, additional field buses via gateway |
Ambient temperature | 0 ... 50 °C (for use indoors or with a protective enclosure) |
Enclosure rating | Wall-mounted: IP 67 |
Tests and approvals | CE, MET (corresponding to UL as per IEC 61010) |
Housing material | PPE with flame-proof finish |
Dimensions H x W x D | 240 x 360 x 110 mm |
Description of modules
Module AA mA/mA sensor input (slot 1-3):
- 2 sensor inputs for connecting, e.g. chlorine sensors, such as CBR or pH transducer pHV1
Module V2 mV/mV temperature sensor input (slot 2-3):
- 2 sensor inputs for connecting pH and ORP sensors and temperature sensors Pt100/
Pt1000, e.g. of type PHER, RHER, PHEI, RHEIC, Pt100SE
Module H1 mA/mA output (slot 1-3):
- 2 electrically isolated 0/4-20 mA analogue outputs for the output of measured values or control variables
Module D1 serial sensor module for monitoring (slot 1-3):
- Module 2 digital sensor inputs for connecting CTFS or CRS corrosion sensors
Module V1 mV/temperature + mA module (slot 2-3):
- 1 sensor input for pH or ORP sensor and temperature sensor Pt100/Pt1000
- 1 sensor input for connecting, e.g. chlorine sensors, such as CBR or pH transducer pHV1
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