Related Manuals for VOLTCRAFT LWT-110
Summary of Contents for VOLTCRAFT LWT-110
- Page 1 Operating manual LWT-110 Conductivity measuring device Permanently connected stainless steel 2-pole measuring cell Waterproof Precise and fast...
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Page 2: Table Of Contents
Qualified personnel.......................... 8 Description ............................ 9 Scope of delivery .......................... 9 Job description............................ 9 The product at a glance ........................ 10 The LWT-110............................ 10 Display elements .......................... 10 Operating elements .......................... 10 Bases for measurement ........................ 12 Conductivity principles ........................ 12 Conductivity measurement ......................... - Page 3 Table of contents Error and system messages...................... 23 Disposal............................. 24 Technical data........................... 25 Service ............................... 26 12.1 Manufacturer............................ 26 B-H87.0.02.DB214-1.0 3 / 26...
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Page 4: Legal Address Of The Manufacturer
1 | Legal address of the manufacturer LWT-110 1 Legal address of the manufacturer Conrad Electronic SE Klaus-Conrad-Str. 1 D-92240 Hirschau http://www.conrad.com WEEE reg. no. DE 28001718 4 / 26 B-H87.0.02.DB214-1.0... -
Page 5: About This Documentation
LWT-110 About this documentation | 2 2 About this documentation 2.1 Foreword Read this document carefully and familiarise yourself with the operation of the product before you use it. Keep this document ready to hand and in the immediate vicinity of the product so that it is available to the personnel/user for reference at all times in case of doubt. -
Page 6: Further Information
2 | About this documentation LWT-110 Outcome of an action Result, consequence or effect of an instruction. Emphases In order to simplify legibility and provide a clearer overview, various sections / informa- tion are emphasised. – 1234 Display elements – Mechanical controls –... -
Page 7: Safety
LWT-110 Safety | 3 3 Safety 3.1 Explanation of safety symbols DANGER This symbol warns of imminent danger which can result in death, severe bodily injury, or severe property damage in case of non-observance. CAUTION This symbol warns of potential dangers or harmful situations which can cause damage to the device or to the environment in case of non-observance. -
Page 8: Intended Use
3 | Safety LWT-110 CAUTION Erratic behaviour! On suspicion that the product can no longer be operated without danger, it must be decommissioned and prevented from recommissioning with appropriate labelling. The safety of the user can be impaired by the device if, for example, if it shows visible damage, it no longer works as specified or if it was stored for an extended period of time under unsuitable conditions. -
Page 9: Description
LWT-110 Description | 4 4 Description 4.1 Scope of delivery Please check to ensure the completeness of the product after opening the package. You should find the following components: – Quick reference guide – Handheld measuring device, ready for operation, including batteries –... -
Page 10: The Product At A Glance
5 | The product at a glance LWT-110 5 The product at a glance 5.1 The LWT-110 LCD Display LWT-110 LWT-110 5.2 Display elements Display Battery indicator Evaluation of the battery status Unit display Display of units, if applicable, with unstable symbol... - Page 11 LWT-110 The product at a glance | 5 Function key Press briefly Freeze measurement Return to measurement display Call up next parameter Long press, 2s Open menu, frozen measurement is displayed Close menu, changes are saved B-H87.0.02.DB214-1.0 11 / 26...
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Page 12: Bases For Measurement
6 | Bases for measurement LWT-110 6 Bases for measurement 6.1 Conductivity principles Conductivity γ Conductivity describes the capability of a material to conduct electrical current. It is also the inverse of specific resistance. The conductance is the inverse of the meas- ured resistance R. -
Page 13: Calibration / Adjustment Of The Measuring Cell
LWT-110 Bases for measurement | 6 2-pole measuring cell 4-pole measuring cell 6.4.2 Calibration / adjustment of the measuring cell In harsh applications and due to ageing processes, the cell constant of measuring cells changes. Depending on the application and precision requirement, the overall precision of the display device and measuring cell measuring chain should be checked regularly. - Page 14 6 | Bases for measurement LWT-110 = conductivity at Temperature 2 14 / 26 B-H87.0.02.DB214-1.0...
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Page 15: Maintenance
LWT-110 Maintenance | 7 7 Maintenance 7.1 Operating and maintenance notices NOTE The product and conductivity measuring cell must be handled with care and used in accordance with the technical data. Do not throw or strike. NOTE If the product is stored at a temperature above 50 °C, or is not used for an extended period of time, the batteries must be removed. - Page 16 7 | Maintenance LWT-110 NOTE Unnecessary screwing places the water-tightness of the product, among other things, at risk and should be avoided. NOTE Read the following handling instructions before replacing batteries and follow them step by step. If disregarded, the product could be damaged or the protection from moisture could be diminished.
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Page 17: Operation
LWT-110 Operation | 8 8 Operation 8.1 Commissioning 8.1.1 Explanation Description The product is switched on with the On/Off button. It may be necessary to configure the product after switching on. See Configuration [} p. 17]. Prerequisite – Sufficiently full batteries are inserted in the product. -
Page 18: Configuring Parameters Of The Configuration Menu
8 | Operation LWT-110 3. By briefly pressing the Function key, you can scroll through the parameters. Select the parameter you would like to configure. 4. When you have selected the desired parameter, change the parameter to the de- sired value with the Up button and the Down button. -
Page 19: Adjustment Of The Measuring Input
LWT-110 Operation | 8 Reference temperature for temperature compensation TREF 25 °( Reference temperature 25 °C or 77 °F Reference temperature 20 °C or 68 °F 20 °( Shut-off time POFF No automatic shut-off Automatic shut-off after a selected time in minutes,... -
Page 20: Configuring Parameters Of The Adjustment Menu
8 | Operation LWT-110 Prerequisites – Sufficiently full batteries are inserted in the product. – The product is switched off. – Ice water, regulated precision water baths or a water bath with a reference meas- urement are available as a reference. - Page 21 LWT-110 Operation | 8 Gradient correction for the conductivity value T.SL 1.000 No gradient correction Multiplier for the gradient correction 0.800 .. 1.200 Formula Zero point correction: Displayed value = measured value – T.OF Gradient correction °C: Display = (measured value – T.OF) * (1 + T.SL / 100) Gradient correction °F:...
- Page 22 8 | Operation LWT-110 22 / 26 B-H87.0.02.DB214-1.0...
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Page 23: Error And System Messages
LWT-110 Error and system messages | 9 9 Error and system messages Display Meaning Possible causes Remedy Range switching or Measuring cell de- Wait for the transient effect ---- measured value un- fect of the controller stable Contamination or air... -
Page 24: Disposal
10 | Disposal LWT-110 10 Disposal NOTE The device must not be disposed of with household waste. If the product is disposed of, please take it to a municipal collection point, where it will be transported to a dis- posal company in accordance with requirements of hazardous goods laws. Otherwise, return it to us, freight prepaid. -
Page 25: Technical Data
LWT-110 Technical data | 11 11 Technical data Measuring range Conductivity 0.000 .. 2.000 µS/cm 0.00 .. 20.00 µS/cm 0.0 .. 100.0 S/cm Specific resistance 10.0 .. 200.0 kΩ/cm 0.010 .. 2.000 MΩ/cm 0.01 .. 20.00 MΩ/cm Salinity Temperature -5.0 .. +105.0 °C (23.0 .. +221.0 °F) – the conductivity measur- ing cells can be exposed temporarily to temperatures of up to 100 °C and permanently to temperatures of up to 80 °C. -
Page 26: Service
12 | Service LWT-110 12 Service 12.1 Manufacturer If you have any questions, please do not hesitate to contact us: Contact VOLTCRAFT Distributed by Conrad Electronic SE Klaus-Conrad-Str. 1 92240 Hirschau, Germany Tel.: +49 9604 40 87 87 Fax: +49 180 5 312110 kundenservice@conrad.de...
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