PH 7685.010
pH+ORP controller
• Applications:
- pH + ORP measuring
- chromate and cyanide treatment plants
- swimming pool
- autoclean sensors
- PFM / PWM regulations
• Dual input from:
- pH electrode (Glass or Antimony)
- ORP electrode
• Input from Pt100 3 wires
• pH/mV/Temperature readout
• Dual filter software
• Operating mode: automatic and manual
• Calibration parameters display
• Set-point and alarm conditions display
• Automatic or manual temperature compensation
• Dual isolated output:
- 0/20 mA or 4/20 mA selectable
- pH/ORP/°C selectable
• Dual set-points (pH/ORP selectable) with selectable action:
- ON/OFF
- PFM proportional Pulse Frequency Modulation
- PWM proportional Pulse Width Modulation
with hysteresis, delay and min/max programmable
functions
• Continuous/flashing alarm
• Min/max and set-points timing alarm relay
• Autoclean relay
• EEPROM parameters storage
• Automatic overload protection and reset
• Extractable terminal blocks
• 96X96 (1/4” DIN) housing
Specifications
Sensor type
Glass pH/Antimony pH/ ORP
Glass electrode
Zero: 0.0 mV at pH 7 ±2 pH
Slope: 59.16 mV/pH 25 °C 80/110 %
Antimony electrode
Zero: -325 mV at pH 7 ±2 pH
Slope: 50 mV/pH 25 °C 70/140 %
ORP electrode
Zero adjustment: ±1000 mV
Sens. adjustment: 80/110 %
Input scales
* pH: 0.00/14.00 ±0.01 pH
* ORP: -1000/+1000 mV ±1 mV
* Software filter 90%RT: 0.4/20.0 s for small/large variations
Temperature
Input: RTD Pt100 2/3 wires connection
Measuring and compensation range: -10/+110 °C
Zero adjustment: ±2 °C
Set point A and B
* ON/OFF action 0.00/14.00 pH -1000/1000 mV
Hysteresis: 0.00/1.50 pH 0/150 mV
Delay: 0.0/99.9 s
* Function: Min/Max
PFM action
Proportional band: 0.00/1.50 pH 0/150 mV
Pulse frequency: 0/120 pulse/min
* Function: Min/Max
PWM action
Proportional band: 0.00/1.50 pH 0/150 mV
Pulse Period: 0/99.9 sec
* Function: Min/Max
Relay contacts
SPDT 220 V 5 A (Resistive load)
Analog output N° 1 and N° 2
* Input corresponding to the analog output : pH/mV/°C
* Output range: 0-20/4-20 mA (it can be made to represent any
segment of the measuring scale)
Options
091.701 RS 232 isolated output.
The output sends the data (pH, mV, °C) to the
serial port of the computer.
091.404 24 Vac power supply
091.4143 9/36 VDC power supply