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Dissolved Oxygen Meter
521-050
OPERATING INSTRUCTIONS
Dissolved Oxygen Meter
521-050
ELE International
Chartmoor Road, Chartwell Business
Park
Leighton Buzzard, Bedfordshire, LU7
4WG England
phone: +44 (0) 1525 249200
fax: +44 (0) 1525 249249
email: ele@eleint.co.uk
http://www.ele.com
ELE International, a division of Hach Lange Ltd.
In the interests of improving and updating its equipment, ELE reserves the right to alter
specifications to equipment at any time ELE International 2006 ©
Distributor:
1
9907X0046 Issue 1
ELE International
Soiltest Product Division
PO Box 389, Loveland, CO 80539
USA
phone: +1 (800) 323 1242
fax: +1 (970) 663 9781
email: soiltest@eleusa.com
http://www.eleusa.com
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Summary of Contents for Ele 521-050
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Page 1: Operating Instructions
ELE International, a division of Hach Lange Ltd. In the interests of improving and updating its equipment, ELE reserves the right to alter specifications to equipment at any time ELE International 2006 © 9907X0046 Issue 1... -
Page 2: Table Of Contents
Dissolved Oxygen Meter 521-050 Contents Section Page Introduction Specification Installation Displays Controls Preparation for Use Operation Calibration Performing Measurements Data Storage Good Practice Guidelines Maintenance Troubleshooting Guide Battery Replacement Auto Shut Off Health & Safety EC Declaration of Conformity WEEE Directive... -
Page 3: Introduction
Dissolved Oxygen Meter 521-050 Introduction The 521-050 is a general purpose, hand held Dissolved Oxygen Meter allowing accurate measurement with ease of use. The custom liquid crystal display simultaneously shows percentage dissolved oxygen or oxygen concentration (mg/l) and temperature. The dissolved oxygen reading is automatically corrected for temperature. -
Page 4: Displays
Dissolved Oxygen Meter 521-050 Displays Primary display - 3½ digit display providing direct readout of % oxygen saturation, % air saturation, mg/l oxygen. Underrange (-1) and Overrange (1) symbols will be displayed if the instrument is reading outside the ranges as shown below:... -
Page 5: Controls
Dissolved Oxygen Meter 521-050 Controls STO RCL STO stores the current data reading. RCL enters recall mode to view the stored readings. Switches the instrument on and off. This key should be pressed and held for 1-2 seconds to operate. -
Page 6: Operation
Dissolved Oxygen Meter 521-050 Whilst still holding the module upright, screw the probe slowly down onto the thread, allowing the excess electrolyte to escape through the screw thread. Ensure no air bubbles are present and that the membrane is not creased. - Page 7 Dissolved Oxygen Meter 521-050 Air saturation This will directly assign a percentage dissolved oxygen to air saturated water and further readings are then given as a percentage of this air saturated water sample. All measurements in this range are given to a resolution of 1%.
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Page 8: Performing Measurements
Dissolved Oxygen Meter 521-050 Fill a suitable container with a sample of clean water. Press the Cal key. Hold the probe so that the membrane is close to, but not touching, the surface of the water (approximately 1 cm above). -
Page 9: Good Practice Guidelines
Dissolved Oxygen Meter 521-050 10.2 Recalling data Pressing the RCL key recalls the last stored reading onto the display. The instrument is now in RCL mode, indicated by the RCL annunciator at the top of the display. The ▲▼ keys are used to select previously stored data. The storage location is indicated by rCL and a number (1-32) momentarily displayed prior to the data. -
Page 10: Maintenance
Dissolved Oxygen Meter 521-050 Ensure the sample is moving across the membrane at a speed greater than 15cm/min to avoid oxygen starvation at the membrane. If the flow rate is insufficient then the sample should be stirred (eg. either by a gentle stirring motion with the probe or with a magnetic stirrer). -
Page 11: Troubleshooting Guide
Dissolved Oxygen Meter 521-050 Rinse with deionised water prior to re-assembly. If the probe is not to be used for 24 hours, store with the protective sheath fitted to prevent the electrolyte from drying out due to evaporation through the membrane, which is porous to water vapour as well as oxygen. - Page 12 If a fault is identified during the start up self check routine, an error code will be displayed. This indicates an internal hardware or software problem. In the event of this, please contact the ELE Service Department. 9907X0046 Issue 1...
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Page 13: Battery Replacement
Dissolved Oxygen Meter 521-050 Battery Replacement Switch the unit off using the I/O key. To fit new batteries; loosen the battery compartment cover (the screws are captive in the cover), remove and carefully discard the used batteries. Fit the new batteries, type R6, AA or AM3, ensuring the correct polarities are observed, as indicated on the moulding. -
Page 14: Ec Declaration Of Conformity
Dissolved Oxygen Meter 521-050 EC Declaration of Conformity The 521-050 Dissolved Oxygen Meter complies with the following European Standards: EN 50081-1:1992 Electromagnetic compatibility – Generic emission standard EN 61326:1998 Electrical equipment for measurement, control and laboratory use – EMC requirements. - Page 15 DIRECTIVE ON WASTE ELECTRICAL & ELECTRONIC EQUIPMENT (WEEE)
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