VOLTCRAFT LWT-100, Operating Manual

Page 1: ...Operating manual EN LWT 100 Conductivity measuring device Permanently connected graphite 2 pole measuring cell Waterproof Precise and fast ...

Page 2: ...nt 12 6 1 Conductivity principles 12 6 2 Conductivity measurement 12 6 3 Total dissolved solids TDS measurement 12 6 4 Salt content salinity measurement 13 6 5 Electrodes measuring cell 13 6 5 1 Design and selection 13 6 5 2 Calibration adjustment of the measuring cell 13 6 6 Temperature compensation 14 6 6 1 NLF temperature compensation according to EN 27888 14 7 Maintenance 15 7 1 Operating and ...

Page 3: ...Table of contents B H87 0 01 DB214 1 0 3 26 9 Error and system messages 23 10 Disposal 24 11 Technical data 25 12 Service 26 12 1 Manufacturer 26 ...

Page 4: ...Legal address of the manufacturer LWT 100 4 26 B H87 0 01 DB214 1 0 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 ...

Page 5: ...rking safely and efficiently with the product In addition to the quick reference guide with all relevant legal and safety content in hard copy this document is a detailed reference option for the product 2 3 Correctness of content The contents of this document were checked for corrected and are subject to a con tinuous correction and updating process This does not rule out potential errors In the ...

Page 6: ...anical controls Product functions Product labels Cross reference p 5 Foot notes 2 5 Further information Software version of the product V1 3 or later For the exact product name refer to the type plate on the rear side of the product NOTE For information about the software version press and hold the ON button to switch on the product for longer than 5 seconds The series is shown in the main display...

Page 7: ...ions and the device specific safety instructions for this document are observed If these notices are disregarded personal injury or death as well as property damage can occur DANGER Incorrect area of application In order to prevent erratic behaviour of the product personal injury or property dam age the product must be used exclusively as described in the chapter Description p 9 in the operating m...

Page 8: ...tteries are avoided as a result NOTE This product does not belong in children s hands For this purpose also refer to 2 Technical data 25 3 4 Intended use The product is designed for measuring the conductivity in liquids The measuring cell is connected permanently See Technical data p 25 3 5 Qualified personnel For commissioning operation and maintenance the relevant personnel must have ad equate k...

Page 9: ...ed and reliability in a compact ergonomic housing Additional impressive features include the dust proof and waterproof design in accord ance with IP 65 67 and the 3 line illuminated display which offers overhead display at the push of a button The product can be switched on switched off and configured and the measurements and parameters can be adjusted and held with the operating ele ments The pro...

Page 10: ...e for the value shown in the main display If applicable alternating with the temperature compensation NOTE The unit display shows a rotating circle segment in the first position as long as the measurement is unstable if the position is unoccupied by the unit display 5 3 Operating elements On Off button Press briefly Switch on the product Activate deactivate lighting Long press Switch off the produ...

Page 11: ...t a glance 5 B H87 0 01 DB214 1 0 11 26 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 ...

Page 12: ... Total dissolved solids TDS measurement The total dissolved solids measurement TDS measurement determines the total dissolved solids which also called evaporation residue based on the conductivity and a conversion factor CtdS of the total dissolved solids Well suited to conduct simple concentration measurements of salt solutions The display shows mg l Range 1 0 to 2000 mg l Display value TDS condu...

Page 13: ...35 according to the IOT The salt composition can also influence the relationship of the salinity display and the actual amount of salt present Corresponding tables are available for many salts in salt water aquarium applications Salt weight to salinity according to the IOT or conductivity In consideration of these tables very precise salinity measurements can be conducted 6 5 Electrodes measuring ...

Page 14: ...ature de pendency varies greatly according to the type of solution With temperature compens ation the solution is calculated back to a uniform temperature in order to compare it independently of the temperature The normal operating temperature for this is 25 C 6 6 1 NLF temperature compensation according to EN 27888 For most applications such as fish husbandry applications and measurement of sur f...

Page 15: ...e This is only necessary for normal use See Adjust ment of the measuring input p 20 7 2 Battery 7 2 1 Battery indicator If the empty frame in the battery display blinks the batteries are depleted and must be replaced However the device will still operate for a certain length of time If the BAT display text appears in the main display the battery voltage is no longer ad equate for operation of the ...

Page 16: ...he batteries Prerequisites The product is switched off Instruction 1 Unscrews the Phillips screws and remove the cover 2 Carefully replace the two Mignon AA batteries Ensure that the polarity is correct It must be possible to insert the batteries in the correct position without using force 3 The O ring must be undamaged clean and positioned at the intended depth In or der to facilitate assembly an...

Page 17: ...rrection of the conductivity measur ing cell was made The product is now ready for measurement NOTE The device is calibrated at the factory and ready for measurement The offset and gradient correction of the temperature measurement and gradient correction of the conductivity measurement can be carried out when exact references are available This is only necessary in exceptional cases 8 2 Configura...

Page 18: ...n menu is closed after the last parameter NOTE If the product is switched off without saving the configuration the last save value is re produced on the next start up of the product 8 2 3 Configuring parameters of the configuration menu Description The following representation shows the available parameters and various configura tion options Prerequisite The Configuration menu is open See Opening ...

Page 19: ...E OFF Backlighting deactivated 15 30 60 120 240 Automatic shut off of the backlighting after a selec ted time in seconds during which no buttons have been pressed ON No automatic shut off of the backlighting Temperature unit UN T Temperature display in C F Temperature display in F Factory settings IN T NO Use current configuration YES Reset product to factory settings IN T DONE appears in the disp...

Page 20: ...menu Release the Down button The display shows the first parameter 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 5 In order to save the new parameter value press and hold the Function key for...

Page 21: ...e 32 F T OF 1 T SL 100 32 F Gradient correction γ Display measured value T SL Example calculation Temperature Zero point correction T OF to 0 00 Gradient correction T SL to 0 00 Display unit UNIT to C Display in ice water 0 2 C Display in ice water setpoint T OF 0 0 C Display in water bath 36 6 C Display in water bath setpoint T SL 37 0 C T OF display zero point correction setpoint zero point T OF...

Page 22: ...ted to 25 C With different temperatures the table value of the corresponding tem perature must be used as a setpoint Outcome of an action The changed value is saved and the Configuration menu is closed NOTE If the product is switched off without saving the configuration the last save value is re produced on the next start up of the product ...

Page 23: ...re pressed Battery depleted System error Product is defective Battery depleted Error in the product Product is defective Replace battery Send in for repair BAT Battery depleted Battery depleted Replace battery ERR 1 Measuring range ex ceeded Measurement too high Measuring cell de fect The measurement is above the permissible range Check the measuring cell Send in for repair ERR 2 Measuring range i...

Page 24: ...ase 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 We will then arrange for the proper and environment ally friendly disposal Please dispose of empty batteries at the collection points inten ded for this purpose ...

Page 25: ...eight 108 54 28 mm without measuring cell or kink protection 180 g incl battery and measuring cell Operating conditions 20 to 50 C 0 to 95 r h temporarily 100 r h Storage temperature 20 to 70 C Power supply 2 AA battery included in the scope of delivery Current requirement battery life approx 2 2 mA approx 3 5 mA with lighting Service life 1000 hours with alkaline batteries without back lighting B...

Page 26: ...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 WEEE reg no DE 28001718 ...