Omega Engineering DOCN600, Dissolved Oxygen System Troubleshooting and Service, Isolate the cause

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9.0TROUBLESHOOTING AND SERVICE

9.1Isolate the cause

9.1.1When a measurement problem occurs, the first step is to try to isolate the cause. If the DOCN600 is powered, go through the menu and check your settings. A convenient way to do this is to call TEST. See Section 5.5.

9.1.2If your DOCN600 appears dead or intermittent, check the breaker, make sure that the instrument is set up for the available line voltage and make sure the line voltage is actually available at the terminals. Now measure that sufficient voltage is available at all times; it should be 98 Vac to 132 Vac or 187 Vac to 243 Vac respectively. Shut line power off, making sure it is off. CAUTION: Power to the relays may be supplied from a separate source, shut it off too. Check and if necessary replace the internal 0.25A fuse. Push the connector of the ribbon cable firmly into its socket. If these steps do not solve the problem it may be necessary to replace the power supply board. See Section 9.3.1 below.

9.1.3If the process value seems wrong, clean the sensor as described in Section 6.1.3. Inspect the sensor, wire, terminal block connections and interconnections. Calibrate and resume operation.

9.1.4To find out whether the problem is in the sensor, or in the analyzer, use the self- testing features. Leave the instrument in RUN mode and proceed as follows:

a)Move the slide switches S40 and S41 on the back of the swing-out panel from position "ON LINE" to position "TEST."

b)Press CALL to enter the menu and go to “%sat/ppm.”

c)Set the D.O. simulation DIP switch Bank S42 switch No. 1, On, Switches No. 2, 3, and 4, Off. The display should show 4 ppm ±5%.

d)Now proceed to turn each of the other S42 switches On with the remaining switches Off.

The display should read within 5% of 10 ppm with switch 2 On, 16 ppm with switch 3 On, and 20 ppm with switch 4 On.

If this is the case the analyzer is in order and the problem is with the probe.

e)Return S40 and S41 to “On line” and ensure that all S42 switches are Off.

9.1.5a) To check the temperature channel move the slide switches S40 and S41 from position “On line” to position “TEST”.

f)Set the DIP switch 1 Bank S1 On.

g)Go to the TEMPERATURE menu item.

d)Set the temperature simulation DIP switch Bank S43 switch No. 1 On, switches No. 2 and 3 Off. The display should show 10 degrees Celsius ±5%.

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Contents DOCN600 Servicing North America Table of Contents General Information Specifications Power RequirementsModel DOCN600 Additional Features Installation LocationType of Mounting Conduit ConnectionsSensor Installation, Flotation Mounting Page Sensor Installation, Submersion Mounting Probe ConnectionsExtension Cable Junction Box Description of Functions OverviewTemperature Compensation Membrane Alarm RelayCalibration Relay OutputsAnalog Outputs Operation MenuDIP Switches OFFSimulated Input for Testing Watchdog Timer and Self DiagnosticsOutput Hold Parameter and Operation CheckingPassword START-UP and OperationPercent Saturation/ppm Analog Output Range Expand TestTemperature StatusRelay a Setpoint Relay a Deadband Relay B SetpointRelay B Deadband Alarm High Alarm LowOperating Hints Cell CareReset Access to Utility MenuUtility Menu Utility Menu FunctionsTemperature Output Adjust 0-1 mA / 0-5 Vdc OutputAdjust 4-20 mA Output Diagnostics Altitude CompensationDescription Invalid OutputTroubleshooting and Service Isolate the causeEscape Printed Circuit Board Replacement Sensor FaultRelay Replacement Statements of Conformity from the Manufacturer WARRANTY/DISCLAIMER Shop online at omega.com

DOCN600, Dissolved Oxygen System specifications

Omega Engineering has set a standard in the field of environmental testing and monitoring with its advanced Dissolved Oxygen System, the DOCN600. This sophisticated device is engineered for precision and reliability, making it a preferred choice for various applications, from wastewater treatment to aquaculture, and laboratory settings. The DOCN600's primary mission is to accurately measure dissolved oxygen levels, a critical parameter in assessing water quality and supporting aquatic life.

One of the standout features of the DOCN600 is its state-of-the-art optical dissolved oxygen sensor technology. Unlike traditional Clark-style electrochemical sensors, which can be subject to interference and require frequent calibration, the optical method uses luminescence to measure oxygen levels. This technology offers several advantages, including lower maintenance requirements, enhanced stability, and improved accuracy over a broad range of conditions.

The DOCN600 boasts a user-friendly interface, complete with a high-resolution LCD display that provides real-time data visualization. Users can access multiple display modes, allowing for quick reference of key metrics, including temperature and oxygen saturation levels. Furthermore, the system is designed with intuitive menus that facilitate easy navigation, ensuring that both seasoned professionals and beginners can operate the device with confidence.

For data management, the DOCN600 is equipped with advanced connectivity options, including USB and RS-232 ports. This allows for seamless integration with external devices and enables users to export data for further analysis. Coupled with its internal memory, which can store extensive historical data, this system empowers users to monitor trends over time, aiding in decision-making processes.

Another notable characteristic of the DOCN600 is its robust build quality, ideal for deployment in various environmental conditions. The system is engineered to be resistant to water, dust, and harsh chemicals, ensuring longevity and reliable performance even in challenging environments. Additionally, with its compact and portable design, it can be conveniently used in field applications as well as in stationary setups.

In summary, the Omega Engineering DOCN600 Dissolved Oxygen System combines cutting-edge optical technology, user-friendly features, advanced connectivity, and a durable design. It stands out as an invaluable tool for anyone needing precise and reliable dissolved oxygen measurements. Whether used in research, environmental monitoring, or industrial applications, the DOCN600 is an excellent investment for achieving accurate water quality assessments.
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