LEGACY MODEL- New model available DCA
The Model 2000 Mixed Liquor Analyser is a two channel analyser designed for the continuous measurement of dissolved oxygen and/or suspended solids in mixed liquor aeration basin. The microprocessor-based electronics of the Model 2000 analyser provide a high degree of flexibility and ease of use. The instrument is designed to operate with any combination of InsiteIG sensors in a variety of applications.
The DO sensor to be used with this analyser is an optical type sensor that measures the fluorescence and quenching reactions of a ruthenium complex that is immobilised in a sol-gel matrix. The SS sensor operates on the principle of single gap infra-red light absorption as a means of detecting the presence of suspended solids.
Ambient condition requirements
Temperature – minus 40 degrees C to 55 degrees C
Humidity – 0 to 100 percent
Altitude – 0 to 10,000 feet
Display LCD Graphic Display with 128 x 64 pixels
Readable from 0 to 70 degrees C (display temperature)
Contrast adjustable through keypad
LED Backlighting
Sensor Check Automatic self diagnostics
Sensor to Analyser Distance 2000 feet (610 meters)
Power Requirements 115 VAC 60 Hz/230 VAC 50 Hz
Accuracy
Dissolved Oxygen – 1% of reading or 0.02 ppm, whichever is greater
Suspended Solids – 3% of reading or 20 mg/l, whichever is greater
Sensitivity or Resolution
Dissolved Oxygen – 0.01 ppm
Suspended Solids –
1 mg/l below 1000 mg/l
10 mg/l between 1,000 and 9,999 mg/l
100 mg/l above 10,000 mg/l
Repeatability
Dissolved Oxygen – 0.01ppm
Suspended Solids – +/- 0.5%
Measuring ranges
Dissolved Oxygen –
0 to 25.0 ppm
0 to 50 degrees C
Suspended Solids –
0 to 30,000 mg/l
Temperature compensation 0 to 50 degrees C
Calibration Method Dissolved Oxygen –
Not required nor recommend during start-up. Cal to reference.
Suspended Solids –
In situ using gravimetric or portable as reference.
Analyser/Transmitter Outputs
Analogue
0 to 20 or 4 to 20 milliamp (user selectable) for DO
0 to 20 or 4 to 20 milliamp (user selectable) for SS
Digital communication Modbus RTU RS-232
Relay There is one independent programmable set point control relay for each channel. These relays are Form-C with contacts rated 10/6 amps resistive load at 125/250 VAC. Two Form-A relays with contacts rated 10/6 amps resistive load at 125/250 VAC are used for the jet clean function. The connections for the relay outputs are available from TB6.
Ordering Information:
DUAL CHANNEL ANALYSERS
2000-1 System–2 D.O. sensors
2000-2 System–1 D.O. + 1 S.S.
2000-3 System–2 S.S. sensors
ADDITIONAL CABLE over 25′ =
ACCESSORIES
AM1 Analyser mounting hardware
SS1 S.S.Sensor mounting hardware
DO1 D.O. Sensor mounting hardware
IH1 Internal heater
CA1 Compressor assembly
model-2000