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Measuring system for determination and control of calcit saturation
The measurement is based on the pH-difference method described in DIN 38404-10 : 1995-04 Calcit saturation of water. Automatic zero-point calibration of the pH-difference measurement.
Reaction time in the marble filter controlled by stepmotor-driven peristaltic pumps. Two separate controllers both of which can be assigned to the pH value of the incoming water or after the marble filter or to the pH difference. High operation safety by defined reaction time in the marble filter
Low maintenance by automatic zero calibration. Integrated controller for optimum decarbonisation
Applications: Drinking Water / Beverages, Cooling And Boiler Feed Water
Characteristics
2 limit values with delay, assigned to alarm relay for pH value or difference
2 separate PI controllers for pH value or difference
Automatic zero calibration of the pH difference in adjustable time interval
Semi-automatic two-point-calibration
Manual or automatic temperature compensation by integrated Pt100
Background illuminated two-line LC-Display for pH value and pH difference or pH value before and after marble filter or pH value and temperature
Serial interface RS 485 - optional
4x scaleable, galvanically isolated 0/4 .. 20 mA outputs
Display of relay status
Technical Data
Measuring parameter:
pH-value 0.00 .. 14.00 pH measuring value 1: before the filter
0.00 .. 14.00 pH measuring value 2: after the filter
-14.00 .. +14.00 pH pH difference (measuring value 1 - measuring value 2)
Input characteristics
accuracy +/- 0.02 pH
temperature measuring range -30 .. +140°C display range
Conditions
max. pressure 1 bar
flow min 15 l/h
ambient temperature 0 .. 50 °C
min. conductivity >150 µS/cm
output characteristics
output signal 4x 0 .. 20 mA (scaleable, galvanically isolated)
load max. 500 Ohm
registration range free adjustable within the measuring ranges
serial interface RS 485 - optional
baud rate 9600
data format 8 bit
Power supply
line voltage broad range power supply 85 .. 265 V AC or DC
power consumption 36 VA
Process Fluid Connections
Water inlet: Tube connector DN4/6, PP, with manual valve for flow adjustment (Q=5 .. 50l/h, pressure 0.5 - 1bar, temperature max. 40°C)
Water outlet: Tube connector DN10, PVC (free outlet, pressureless)
Ambient conditions
ambient temperature operation 0 .. +50 °C, storage -20 .. + 65°C
exception sensors: 0 .. 30°C
relative humidity max. 90% at 40°C non-condensed
protection class
wall mounted housing IP 65
IP 54 (with two pumps)
Controller
control response On/off controller (adjustable hysteresis)
P/PI/PID-controller (pulse-pause, pulse-frequency or continous controller output)
relays 2 x potential-free NO-contact, max. 250 V, 6 A, 550 VA for activation dosing pumps / Servo-motor
1 x potential-free CO-contact, max. 250 V, 6A, 550 VA for alarm
onset delay 0 .. 2000 sec
digital input 1) External controller stop
2) Surveillance of the measurements
3) Ext. Initiation of the automatic zero-point calibration
Certificates and approvals
CE-symbol Declaration of conformity: The product meets the requirements of the harmonized European standards. It thus complies with the legal
requirements of the EC directives.
Mechanical construction
material board: PVC, assembly: PVC, cocks: PP instrument: ABS, sensors: Glas
dimensions 550 x 545 x 150 mm
water coupling pipe connection DN 4/6, pre-pressure 0.5 .. 1 bar
outlet pipe connection DN 10, free outlet
Order information
BalanceCon 77612729K - Measuring system to measure and control calcite solubility
BalanceCon 57000000K - Refill-Set Refill set for the filter accessories
Sensor AH-300-K-2-1(-PG)
The AH-300-K-2-1(-PG) is a combination electrode for pH measurement in all-purpose applications. The sensor is gel filled, not refillable and requires little maintenance.The reduced junction size Increases the expected life time of the sensor in contact with deionised media.
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