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levr

 

LIM-05 user manual 

Dated 25/5/2017 

http://www.levr.pl/

 

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4.11  “ENT” key 

Use the “ENT” key to confirm your selection. 

4.12  “ESC” key 

Use the “ESC” key to leave your selection. 

4.13  “•” key 

Decimal  sign  key.  Press  it  to  cyclically  change  the  displayed  measurement  channels 
with  their  recorded  runs.  It  is  also  used  to  enter  numerical  values  that  require  higher 
precision (e.g. tenths of a metre when entering the length of the alarm loop).  

4.14  “

” and “

” keys 

The  role  of  the  keys  with  the  symbols  indicated  above  depends  on  the  selected 
function. Consequently, they are referred to as: right-left; up-down; increase-decrease. 

5

5

.

.

 

 

M

M

a

a

i

i

n

n

 

 

m

m

e

e

n

n

u

u

 

 

The  main  menu  only  appears  on  the  screen  after  you  press  the  “FN”  key,  and  only 
when a chart is displayed. The options available in the main menu are specified below. 
The digits refer to symbols on the keys. 
 

1 - Kanal (Channel) 
2 - Start/Stop 
3 - Kalibracja (Calibration) > [haslo] ([password]) 
– Historia (History) 
– Przebieg roznicowy (Differential run) 
6 - Przebieg wej

ś

ciowy (Input run) 

– Przebieg odniesienia (Reference run) 
– Info 

5.1  “Kanał” (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,  enter  the 
identification  code  of  the  channel  (digits  1–4;  see  section  0).  The  same  function  is 
performed by the decimal sign (“·”) key. 

5.2 “Start/Stop” option 

The  LIM-05  instrument  is  designed  for  continuous  operation.  However,  during  its 
operation,  the  measurement  process  may  be  stopped  for  an  unlimited  period.  This  is 
done  using  the  Start/Stop  option.  The  setting  is  changed  to  the  opposite  setting 
whenever  you  press  the  “2”  key.  The  Start  setting  activates  cyclical  measurements. 
This is continuously indicated by the “>AUTO<” description displayed in the bottom 
right corner of the screen. The Stop setting (measurement interruption) is not indicated 
on the screen. 

5.3  “Kalibracja” (Calibration) screen 

This option can only be used after you enter the password – a preset sequence of digits. 
The  factory  password  is  “123”.  You  can  use  this  password  to  enter  the  “Kalibracja” 
(Calibration) option and replace it with your own password. This option can be used to 
set the measurement conditions, e.g. value of the VOP coefficient, length of the alarm 
loop, etc. 

Содержание LIM-05

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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