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
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
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Measuring range | Conductivity: With digital sensor CTFS at input A and B and 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 voltage: -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 mA 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 analogue outputs 0/4-20 mA for the output of measured values or control variables
Module D1 serial sensor monitoring module (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
Module CM Modbus RTU + 2 mA outputs (slot 3):
- 1 Modbus RTU slave, for connecting to a PLC or gateway
- 1 Modbus RTU master, for connecting a Pyxis fluorometer sensor
- 2 electrically isolated analogue outputs 0/4-20 mA for the output of measured values or control variables
Module CA Modbus RTU + 2 mA outputs + 2 mA inputs (slot 3):
- 1 Modbus RTU slave, for connecting to a PLC or gateway
- 1 Modbus RTU master, for connecting a Pyxis fluorometer sensor
- 2 electrically isolated analogue outputs 0/4-20 mA for the output of measured values or control variables
- 2 sensor inputs for connecting, e.g. chlorine sensors, such as CBR or pH transducer pHV1
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