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B&C Electronics pH 7685

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General information The 7685 Series ncludes all of the most complete and most performing analyzers of B&C Electronics. They include all of the following measures: • pH - ORP • Conductivity - Resistivity • Free residual chlorine, combined and total • Residual chlorine dioxide • Residual dissolved ozone • Dissolved oxygen • Turbidity and Suspended Solids • Residual dissolved Sulfide/Sulfite • ISE All controllers are manufactured in robust aluminum enclosures DIN 43700, with front panels in polycarbonate. Their reliability and precision, along with their functionality, make them easy to use in all applications. Finally, 7685 Series guarantees one of the best performance-price ratio in the marketplace.
FeaturesTechnical DataApplications

 

Main features

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

 

 

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

• water treatment
• food industry
• drinking water
• swimming pool
• biotechnology

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