KROHNE OPTISENS ODO2000 Bedienungsanleitung

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OPTISENS ODO 2000

Quick Guide

The documentation is only complete when used in combination with the

relevant documentation for the signal converter.

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Optical dissolved oxygen sensor for waste water analysis

Optical dissolved oxygen sensors are widely used to control and monitor oxygen concentration

during the biological treatment of sewage water.

The dissolved oxygen sensor OPTISENS ODO 2000 from KROHNE has a standardized robust

design and a long lifespan. Therefore the sensor is especially designed for small and medium-

sized wastewater treatment plants, where regular calibration and cleaning of the sensors is

difficult due to limited maintenance resources.

OPTISENS ODO 2000’s use of the optical principal interacting with a fluorescent membrane

means there’s no need for recalibration. Precision and reliability remain constant. The integrated

spray cleaning system minimizes the need for manual cleaning, which means longer intervals

between maintenance.

OPTISENS ODO 2000

Highlights

No recalibration necessary

Reliable measurement via fluorescence

measurement

Fast response time in all application

No media flow required

Long-term stability due to reduced

clogging by integrated spray cleaning

system

Low cost of ownership

Suitable for installation with telescopic

rod SENSOFIT IMM 2000

SENSOFIT IMM 2000

Industries

Waste water industry

Applications

Monitoring the oxygen content in mg/l

in aeration basins

Controlling biological treatment in

aeration basins, which can also be

combined with measuring nitrate and

ammonium

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1. Dimension

(1) Attached cable

(2) Air input

(3) Thread

(4) Air nozzle

(5) Sensing element

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2. Electrical Connections

Safety instructions

DANGER!

All work done on the electrical connections may only be carrier out with the power disconnected.

Take note of the voltage data on the nameplate!

DANGER!

Oberserve the national regulations for electrical installations!

WARNING!

Observe without fail the local occupational health and safety regulations. Any work done on the

electrical components of the measuring device may only be carried out by properly trained

specialists.

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check

for the correct supply voltage printed on the nameplate.

Connecting sensor cable to signal converter

Sensor connection terminals MAC 100

(1) Sensor connection terminals

(2) Terminal block S (protective earth)

(3) Terminal block A: terminals for sensor and temperature

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INFORMATION!

For OPTISENS ODO 2000 there is only the single channel version is available and the interface

"Pos.A" is populated.

INFORMATION!

Connecting the sensor cable to the MAC 100 signal converter

• Thread the sensor cable through the cable gland (1).

• To connect the cable to the signal converter, press down the wire (7) on the corresponding

terminal.

• To remove a cable, press down the white clip (8) on the corresponding terminal and pull the

cable out.

Wire

Terminal block A

White

Green

Yellow

Grey

Not connected

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3. Power supply

Open the cover of the electrical terminal compartment by pressing down and pulling forwards

at the same time.

Figure 1: Power supply connection

(1) 100…230 VAC (-15%/+10%), 8 VA

(3) 24 VAC/DC (AC: -15%/+10%; DC: -25%/+30%)

Close the cover after the power has been connected.

24 VAC/DC (tolerance range: AC: -15% / +10%; DC: -25% / +30%)

• AC: Note the power supply voltage and frequency (50…60 Hz) on the nameplate.

• DC: When connecting to functional extra-low voltages, provide a facility for protective

separation (PELV) (acc. To VDE 0100 / VDE 0106 and IEC 364 / IEC 536 or relevant national

regulations).

INFORMATION

12 V is not included in the tolerance range.

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4. Calibration

INFORMATION

If the sensitivity of the sensor has to be calibrated the zero point has also to be calibrated.

Sensitivity calibration in saturated water or in air must be performed before the zero

calibration.

For product calibration the air pressure (100 000 Pa), the relative humidity (50%) and the

salinity (00 000 mg/l) has to be configured.

For the zero point calibration use nitrogen (N2) or sodium sulfite.

1. Sensitivity calibration

Press > for 2,5 sec., then release the button. You are now on the main menu level.

You are on the main menu level. In the upper line on the right side of the display "A"

appears, beneath the main menu quick setup is highlighted.

Press the ▲or ▼until the main menu setup is highlighted.

Main menu

A quick Setup

B test

> C setup

D service

Press > to enter the chosen menu.

The submenu process input A is highlighted.

Press > to enter the chosen menu.

Press ▲or ▼to select the air pressure in Pa

Press to confirm the entered value.

Press ▲or ▼to select the humidity in %

Press to confirm the entered value.

Press ▲or ▼to select the salinity in mg/L

Press to confirm the entered value.

The submenu start calib. is highlighted.

Start now the sensitivity calibration and press to confirm the entered value.

On the display the actual concentration is highlighted. Wait till the value is stable

and then press to start the calibration.

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The message sensitivity calibration successful is highlighted if the calibration was

successful.

In this case press and proceed with the zero point calibration by pressing .

If the message sensitivity calibration unsuccessful is highlighted if the calibration was not

successful. Press and answer the question to repeat the calibration with yes or no. Press

▲or ▼and confirm with .

2. Zero point calibration

After the successful sensitivity calibration press to perform a zero point calibration.

Submenu start calib. is highlighted.

Start the zero point calibration and press .

On the display the actual concentration is highlighted. Wait till the value is stable and then

press to start the calibration.

The message zero point calibration successful is highlighted if the calibration was

successful.

In this case press several times to leave the calibration menu.

If the message zero point calibration unsuccessful is highlighted if the calibration was not

successful.

Press and answer the question to repeat the calibration with yes or no. Press ▲or ▼and

confirm with .

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5. Technical data

Low maintenance optical sensor for dissolved

oxygen measurements with automatic

cleaning

OPTISENS ODO 2000

Parameter

Dissolved oxygen

Measuring principle

Optical

Type

Digital sensor with 4…20 mA current output or

to connect to MAC 100

Electrode

luminophore disc

Measuring range

0 … 20 ppm

Accuracy

+/- 0.1 ppm @ < 1ppm

+/- 0.2 ppm @ >1 ppm

Process temperature

-5…+50°C / +23…+122°F

Process pressure

1 bar; 14.5 psi

Installation conditions

Immersion installation

Materials

PVC

Enclosure rating

IP 68

Cleaning system

Integrated cleaning nozzle for compressed air

Connector

core ends

Cables

10 m/32,8 ft fixed cable

Others

Integrated temperature compensation;

luminophore disc life >1 year (not exposed to

sunlight)

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6. Order Code

Order Code OPTISENS ODO 2000 Sensors and Cable, optical - Dissolved Oxygen

VGAO 4 Sensor type

A* OPTISENS ODO 2000

Measuring Range

1* 0 ... 20 mg/L (ppm)

Sensor Features

A* 1x 4..20mA/RS485

Process conditions

1* -5...50°C/23...122°F; 1 bar/14.5psi

Enclosure type

B* submersible with flush nozzle

Body material

1* PVC

Process connection

A* Submersible; 2"NPT male threat for mounting

Power supply

1* 9...36 VDC/loop powered

Cable

B* Cable ODO-W 2000

Cable Features

A* Attached cable

Cable length

3* 10 m(33 ft.)

Cable Options

1* core sleeves ends

Sensor Options

1* Flush nozzle plus 10 m/33ft. flush hose

Documentation

0none

1* English

2German (available fromQ2 2012)

3French (available fromQ2 2012)

4Spanish (available fromQ2 2012)

VGAO 4 Order code

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