OD 7685.010
Autoclean Dissolved Oxygen controller
Add the following to the common Features/Specifications
of the 7685 Series shown overleaf
• Applications:
- water treatment
- activated sludge
- de-nitrification
- fish pond
• Input from galvanic cell
• Scales: PPM - mg/l - % air sat. - mmHg
• Autoranging
• Temperature readout in °C or °F
• 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
• Dual 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
• Autoclean relay and holding function for input and outputs
• EEPROM parameters storage
• Automatic overload protection and reset
• Extractable terminal block
• 96x96 (1/4 DIN) housing
Probes and accessories
This instrument uses the OD 8182 dissolved oxygen probe.
It is normally installed in the OD 8112 autoclean assembly
Specifications
* Galvanic cell
membrane: 1 mil - 2 mil - 5 mil (5 mil standard)
cable length: 15 m
* Scales
0/400 - 0/200.0 - 0/20.00 mmHg
0/400 - 0/200.0 - 0/20.00 % air saturation
0/40.0 - 0/20.0 PPM - 0/2000 PPB
0/40.0 - 0/20.00 mg/lt - 0/2000 μgr/lt
* Software filter 90%RT: 0.5/50.0 s for small/large variations
Zero: ± 1 mV
Sensitivity: 62.5/212.5 %
Temperature
measuring and compensation range: +2/+52 °C or 28,4/125,5 °F
Zero: ± 2 °C or ±3,6 °F
Input: Pt100 3 wires
Temperature compensation
Internal table for each membrane type
Reference temperature: 20 °C or 68 °F
Manual compensation: 0/50.0 °C or 32/122 °F
Secondary parameters
Pressure: 500/800 mmHg
Salinity: 0/60,000 PPM
Relative humidity: 0/100 %
Analog outputs
Dual isolated for D.O and temperature
Set points
Dual with ON/OFF programmable functions
* Autoclean function
Disable - manual - auto + manual
* Repetition cycle: 0.1/24 hours
* Number of cycles: from 1 to 10
* Compressor time: 0.5/60.0 sec.
* Discharge time: 0.5/10.0 sec.
* Holding time: 0/20.0 min. (for measuring, outputs, relays)
Option 091.4143
9/36 VDC power supply