Ele 521-050 Operating Instructions Manual Download

Page: 2 / 16

Dissolved Oxygen Meter
521-050

2 9907X0046 Issue 1

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

Summary of Contents for 521-050

Page 1: ...ax 44 0 1525 249249 email ele eleint co uk http www ele com ELE International a division of Hach Lange Ltd Distributor 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 In the interests of improving and updating its equipment ELE reserves the right to alter specifications to equipment a...

Page 2: ...on 3 4 Displays 4 5 Controls 5 6 Preparation for Use 5 7 Operation 6 8 Calibration 6 9 Performing Measurements 8 10 Data Storage 8 11 Good Practice Guidelines 9 12 Maintenance 10 13 Troubleshooting Guide 11 14 Battery Replacement 13 15 Auto Shut Off 13 16 Health Safety 13 17 EC Declaration of Conformity 14 WEEE Directive ...

Page 3: ...d in a robust ergonomically designed case An indication of battery life is also permanently shown on the display An automatic switch off facility helps to conserve battery life 2 Specification DO2 Ranges 5 to 199 5 to 25 0 5 to 19 99 mg l Resolution 1 0 1 0 01 mg l Accuracy 2 within 10 C of calibration temperature Temperature Ranges 10 to 105 C 14 to 220 F Resolution 0 1 C 1 F Accuracy 0 5 C 1 F A...

Page 4: ...C or F Manually adjusted pressure values Bar and salinity values g l will be shown when the relevant mode is selected 4 3 CAL annunciator indicates when a calibration is being performed 4 4 Battery Life Indication 4 levels will be shown ranging from 25 25 50 50 75 and 75 100 Sensor calibration data and user parameters are retained during battery replacement 4 5 Mode annunciator indicates which mod...

Page 5: ... primary measurement parameter from DO2 to mg l as required When temperature is displayed holding this key for 3 seconds changes the display to read in C or F 6 Preparation for Use NOTE Prior to using the chemicals listed please refer to the Health Safety information at the rear of the manual The probe is delivered with the membrane module detached Prior to use the membrane module must be fitted t...

Page 6: ...ments will be illuminated for approximately 2 seconds An internal self check routine is run during this display and on successful completion normal operating mode is activated The display will either power up in DO2 or mg l mode depending upon previous usage 7 1 DO2 mode This gives a direct readout of the DO2 of the sample under test as either oxygen saturation or air saturation When the instrumen...

Page 7: ... as a percentage of oxygen in the sample All measurements in this range are given to a resolution of 0 1 Calibrate the probe in zero solution see section 8 Fill a suitable container with a sample of clean water Press the CAL key Use the keys to adjust the primary display to read 20 9 The MAN annunciator will be displayed Hold the probe so that the membrane is close to but not touching the surface ...

Page 8: ...measurements 9 Performing Measurements Select the mode required and immerse the probe in the sample to be measured 40mm depth minimum A flow rate of 15cm min in the sample is required to avoid errors due to oxygen starvation at the membrane If the flow rate is insufficient then the sample should be stirred either by a gentle stirring action with the probe or by use of a magnetic stirrer 10 Data St...

Page 9: ...ed water For longer periods overnight the protective sheath should be fitted with the sponge insert soaked in distilled water This will prevent the electrolyte fill solution from drying out due to loss of water through the porous membrane b Ensure the probe is polarised prior to use It is essential to perform this procedure after replacement of the membrane or probe A 30 minute period of polarisat...

Page 10: ...inity 12 Maintenance Although the oxygen probe is supplied in a clean and tested condition it may after some time become sluggish or erratic due to contamination of the gold cathode silver anode or membrane 12 1 Membrane replacement a Hold the probe in a vertical position and carefully unscrew the membrane module b Take the new membrane module and holding it in a vertical position fill with electr...

Page 11: ...ncorrect Refit batteries Unstable display DO2 probe defective Replace DO2 probe Probe not fitted correctly Check connections Calibration to 100 with zero solution Repeat zero calibration procedure with fresh zero solution Calibrate the probe to 100 in air Display permanently Intermittent or no connection Check electrode connection to instrument under or over range DO2 probe defective Replace DO2 p...

Page 12: ...sh zero solution and recalibrate Erratic or slow response open Measurement Incorrect salinity Reset salinity values errors Calibration error Recalibrate instrument Contaminated solution Replace solution Incorrect standards Replace standards Incorrect barometric pressure Reset barometric pressure Unable to calibrate to 100 Calibrating to previously set value Manually reset value to 100 Permanently ...

Page 13: ...water If discomfort persists OBTAIN MEDICAL ATTENTION Lungs Remove from exposure Skin Wash off thoroughly with soap and water Mouth Wash out mouth thoroughly with water In severe cases OBTAIN MEDICAL ATTENTION 16 2 PRODUCT Sodium Sulphite Anhydrous HEALTH HAZARD If ingested in quantity can cause gastric irritation colic diarrhoea central nervous system depression and death due to liberation of sul...

Page 14: ...ds EN 50081 1 1992 Electromagnetic compatibility Generic emission standard EN 61326 1998 Electrical equipment for measurement control and laboratory use EMC requirements EN 61010 1 1993 Safety requirements for electrical equipment for measurement control and laboratory use Following the provision of EMC Directive 89 336 EEC and Low Voltage Directive 73 23 EEC ...

Page 15: ...DIRECTIVE ON WASTE ELECTRICAL ELECTRONIC EQUIPMENT WEEE ...

Page 16: ......

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