toshcon

Thursday, 09 21st

Last updateMon, 15 Sep 2014 5am

PH 7685
pH/ORP controller

 

Add the following to the common Features/Specifications

of the 7685 Series shown overleaf 

Applications:

- water treatment

- food industry

- drinking water

- swimming pool

- biotechnology 

Input from:

- pH electrode (Glass or Antimony)

- ORP electrode

- Pt100 3 wires 

• Temperature readout

• Calibration parameters display

• Set-point and alarm conditions display 

• Automatic or manual temperature compensation

• Operating mode: automatic and manual 

• 0/20 mA or 4/20 mA programmable isolated output

• Dual set-points with hysteresis, delay and min/max

   programmable functions 

• Min/max and set-points timing alarm relay

• Continuous/flashing alarm 

• EEPROM parameters storage

• Automatic overload protection and reset

• Extractable terminal blocks

• 96X96 (1/4” DIN) housing 

Specifications 

Sensors type

Glass pH - Antimony pH - ORP - 080102.1 preamplifier

RTD Pt 100 3 wires 

Glass electrode

Zero: 0.0 mV at pH 7 ±2 pH

Slope: 59.16 mV/pH at 25 °C 80/110 % 

Antimony electrode

Zero: -325 mV at pH 7 ±2 pH

Slope: 50 mV/pH at 25 °C 70/140 % 

ORP electrode

Zero adjustment: ±100 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

Measuring and compensation range: -10/+110 °C

Resolution: +/- 0.1 °C

Zero adjustment: ±2 °C

Manual Temp. comp: -10.0/110.0 °C 

Option 091.211

Set-point A/B selectable actions: ON/OFF - PFM – PWM 

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 s

Function: Min/Max 

Option 091.3711

Dual isolated output.

The user may select the temperature output 

Option 091.4143

9/36 VDC power supply

 

You are here: Home Products Process Control (Analytical) Analyzer Dissolved Oxygen 7685 ( Microprocessor Based With Alphanumeric Display)