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levr

 

LIM-05 user manual 

Dated 25/5/2017 

http://www.levr.pl/

 

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Number of monitored alarm loops ................................................................................. 4 
Maximum length of the alarm wire ....................................................... 3518 m · VOP)

1 

Location measurement resolution ............................................................±0.23 m · VOP 
Range of VOP values ................................................................ 0.300–1.000 (30–100%)  
Location error ........................................................................................................... ±1 m 
Input impedance of the instrument ........................................................................ 200 

 

Indication of faults ................................................................... red LED (every channel) 
 
Measurement pulse characteristics: 
Duration  ............................................................................... 12.5 ns, 25 ns, 50 ns, 75 ns 
Voltage amplitude (unloaded output) .......................................... adjustable: 4.8–14.6 V 
 
Method of measurement information display .................... LCD screen, 128x240 pixels 
Method of presentation of measurement results ...................................... annotated chart  
Method of instrument programming .................................... 16 numerical/function keys 
Voltage measuring range ................................................................................ ±2047 mV 
Maximum measurement sensitivity ............................................................... 1 mV/pixel 
Sensitivity threshold voltage range ............................................................... 1–1024 mV 
Dead time range .............................................................................................. 1–255 min 
 
Methods of communication with external devices: 
Alarm output .............................................. volt-free relay contacts (capacity 1 A/60 V) 
Digital transmission ............................................................................................ RS232C  
Radio transmission (optional) ............................................... GSM transmission module 
 
Supply voltage ............................................................................................. 230 V 50 Hz 
Power drawn from the power supply network ............................................... up to 6 VA 
 
Operating temperature range ...........................................................................0 to +50°C 
Relative humidity ............................................................................................. up to 80% 
Housing protection rating ........................................ IP54 (IP65 available upon request) 
Electrical protection of measuring inputs ............................................. 250 V (AC+DC) 
Appliance class ............................................................................................................. B 
Dimensions ...................................................................... 262 mm x 235 mm x 143 mm 

 

)

1

 

– 

(VOP) speed of propagation of the measurement pulse in the alarm wire in relation to the speed of light 

propagation in vacuum. This value is specified in percentage (from 0 to 100%) or in relative quantities (from 
0.00 to 1.00). 

 

 

EZUP LEVR” s.c. 

03-193 Warsaw 
ul. Krzy

ż

ówki 5 

tel./fax: +48 22 639 85 66 

e-mail: 

[email protected]

 

www.levr.pl

 

 

Summary of Contents for LIM-05

Page 1: ...LIM 05 pulse fault locator user manual Software version 17 05 USER MANUAL EZUP LEVR s c 03 193 Warsaw ul Krzy wki 5 tel fax 48 22 639 85 66 Ver 17 12...

Page 2: ...0 FN key 9 4 11 ENT key 10 4 12 ESC key 10 4 13 key 10 4 14 and keys 10 5 Main menu 10 5 1 Kana Channel option 10 5 2 Start Stop option 10 5 3 Kalibracja Calibration screen 10 5 4 Historia History opt...

Page 3: ...16 Calibration procedure Kalibracja Calibration option D ugo p tli Loop length entry 16 Channel number entry 18 Initiate or stop automatic measurements 18 Creating and recording the reference run 18...

Page 4: ...t calculates the distance between the measurement station and the point of reflection i e location of the fault The method of fault location in preinsulated district heating pipelines with a detector...

Page 5: ...epicts the actual distance in m Figures 1 and 2 depict the method of presentation of measurement information Fig 1 Depiction of the reflected measurement pulse on the detector screen in case of a leak...

Page 6: ...ength of the section of the alarm wire between these cursors x default axis x y default axis y Up Up voltage thresholds for initiation of automatic fault detection and indication the dead area is 2Up...

Page 7: ...he operating conditions return to normal 3 1 Connection of the locator to the alarm system of the district heating pipeline The locator is connected to the carrier pipe and copper sensor wire with a c...

Page 8: ...nment and the speed of light propagation in vacuum For district heating pipelines with a copper sensor wire this coefficient adopts values of the 0 91 0 93 range 4 2 2 zoomH key Press the 2 zoomH key...

Page 9: ...of the screen after pressing the 6 K2 key 4 7 7 PING key Activating the PING function will force a measurement cycle in the selected measurement channel and display the measured run Depending on the...

Page 10: ...ia Reference run 8 Info 5 1 Kana Channel option This option can be used to display measurement information about one of the monitored sections of the district heating pipeline To select the channel en...

Page 11: ...iowy Input run option enables presentation of the collected digital data in the form of a chart These data refer to the last measurement When the input run is displayed the screen will display a descr...

Page 12: ...ion method also ensures that the image corresponds to reality For instance if a fault occurs near the end of the network it will be represented near the end of the x axis and not for instance in the c...

Page 13: ...ge value of measured results i which will be recorded as the reference run See section 0 6 5 Czas martwy Dead time entry The automatic measurement cycle of the fault locator consists of measurements c...

Page 14: ...nitial stages of its development The shape of the reflected pulse will be represented within the range of voltage thresholds determining the measuring range Extending the voltage measuring range will...

Page 15: ...ce of this message means that there is no communication between the computer and the locator In such a situation make sure that the devices are correctly connected and check the status of the selected...

Page 16: ...ed only after the locator screen displays the run Calibration procedure Kalibracja Calibration option D ugo p tli Loop length entry Note Locator calibration should be carried out 30 minutes after the...

Page 17: ...he section of the x axis visible on the chart does not reflect the actual length of the alarm wire In section 3 increased length of the line was specified precisely in order to ensure that the image o...

Page 18: ...on of automatic measurements is indicated by the AUTO description It will appear in the bottom right corner of the screen Stopping automatic measurements will cause the description to disappear The se...

Page 19: ...1 10 0 M Ma ai in nt te en na an nc ce e o of f t th he e L LI IM M 0 05 5 i in ns st tr ru um me en nt t A clean dry cloth should be used to remove dust from the housing of the instrument Other dirt...

Page 20: ...range 2047 mV Maximum measurement sensitivity 1 mV pixel Sensitivity threshold voltage range 1 1024 mV Dead time range 1 255 min Methods of communication with external devices Alarm output volt free r...

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