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B&C Electronics OD 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
Scales: PPM – mg/l – % air sat. – mmHg Autoranging

Temperature readout
Dual filter software

Calibration parameters display
Dual set-point and alarm conditions display

Autocalibration in air
Automatic or manual temperature compensation

Pressure, R.H., salinity compensation
Isolated output:
• 0/20 mA or 4/20 mA selectable
• programmable input on the span

Automatic or manual operation
Dual set-point with hysteresis, delay, and min/max programmable
functions

Alarm:
• continuous/flashing
• min/max and delay programmable
• on set-points timing
• Autoclean relay and holding function for input and outputs

EEPROM parameters storage
Automatic overload protection and reset
Extractable terminal block
96×96 (1/4 DIN) housing

Technical Specifications

Temperature
Input: RTD Pt100 2/3 wires
Set point A and B:
Operation: ON/OFF
Hysteresis: adjustable
Delay: 0.0/99.9 s
* Function: Max/Min
Relay contacts: SPDT 220 V 5 A (resistive load)
Alarm:
Low/High: adjustable
Delay: 0.0/99.9 s
* Relay status: activated/deactivated
* Alarm on max. operating time of set-point A/B: ON/OFF
* Max operating time of set-point A/B: 0/60 minutes
* Relay contacts: SPDT 220 V 5 A (resistive load)
Analog output N° 1
* Input corresponding to the analog output (option 091.371x):
selectable
* Output range: 0-20/4-20 mA (it can be made to represent any
segment of the measuring scale
Response time: 2.5 s for 98%
Isolation: 250 Vac
Load: 600 ohm max
Analog outpunt N° 2 (option 091.371x)
* Input corresponding to the analog output: selectable
* Output range: 0-20/4-20 mA (it can be made to represent any
segment of the measuring scale
Response time: 2.5 s for 98%
Isolation: 250 Vac
Load: 600 ohm max
Configuration (*)
The above parameters indicated by asterisks “*”, may be selected in the
Configuration menu
General Specification
Alphanumeric display: 1 line x 16 characters
Operating temperature: 0/50 °C
Humidity: 95% without condensation
Power supply: 110/220 Vac ± 10% 50/60 Hz
Isolation: 4 kV between primary and secondary (IEC 348)
Power: 5 VA max.
Terminal block: extractable
Weight: 850 g
Dimensions: 96 x 96 x 155 mm
Options
091.701 RS 232 isolated output The output sends the data to the serial port of the
computer.
091.404 24 Vac power supply
091.414X 9/36 VDC power supply

 

• water treatment
• drinking water
• fish pond
• food industry
• biotechnology

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