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Friday, 07 28th

Last updateMon, 15 Sep 2014 5am

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

 

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