OD 7685.110 Dissolved oxygen analyzer for autoclean optical probe

The controller uses the OD 8382 optical dissolved oxygen probe. It provides manual and automatic temperature compensation. The instruments provides also the temperature reading.
FeaturesTechnical DataApplications

Specifications

  • Selectable scales in ppm – mg/l – % of air – mmHg
  • Temperature readout by means of Pt1000 in °C or °F
  • Dissolved oxygen range: 0/19,99 ppm – 0/19,99 mg/l- 0/199,9 % of air saturation – 0/199,9 mmHg
  • Temperature range: -2/+52 °C or 28,4/125.5 °F
  • Automatic or manual temperature compensation
  • Pressure, salinity and relative humidity compensation
  • Oxygen solubility table stored into the microcomputer
  • Autocalibration in air
  • Operating mode: automatic and manual
  • Set-point and alarm conditions display
  • Dual analog output: 0-20 – 4-20 mA isolated
  • 2 set-point with min/max function, hysteresys and delay time programmable
  • Min/max and set-points timing alarm relay
  • Sensor cleaning relay, with programmable cleaning cycle and waiting time
  • Power supply: 110/220 V,  5 VA.
  • Dimensions: 96x96x155 mm.  DIN 43700

Technical Specifications
in addition to those common in the series 7685
* Optical D.O. sensor
cable length: 10 m
* Scales
0/400 – 0/200.0 mmHg
0/400 – 0/200.0 % air saturation
0/40.0 – 0/20.0 PPM
0/40.0 – 0/20.00 mg/lt
* Software filter 90%RT: 0.5/50.0 s for small/large variations
Zero: ± 40 mV
Sensitivity: 20/250 %
Temperature
measuring and compensation range: +2/+52 °C or 28,4/125,5 °F
Zero: ± 2 °C or ±3,6 °F
Input: Pt1000 2 wires
Temperature compensation
Internal table
Reference temperature: 20 °C or 68 °F
Manual compensation: 0/50.0 °C or 32/122 °F
Secondary parameters
Pressure: 500/850 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 9/36VDC power supply