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Kobold NGM-HART, Руководство по эксплуатации

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Configuration Set NGM-HART 

page 32 

 

NGM-HART K05/0922 

5.4.18 

Signal Discussion 4  

 

Level Rod Probe

 

  
• Stable reference reflection at the beginning 
• Negative level reflection at 168mm 
• No end of probe reflection as energy is completely reflected at water surface 
• Positive coupling reflection in saturation as amplification factor increased 
 

Dead band parameter at 30 mm. 
20 mA parameter at 50 mm. 
4 mA parameter at 230 mm. 
Amplitude threshold at 1000.  

 

 
 
 
 
 
 
 
 
 
 

Содержание NGM-HART

Страница 1: ...Operating Instructions for Configuration Set HART Modem Model NGM HART...

Страница 2: ...ed products can be improved and changed at any time without prior notice Copyright All rights reserved 1 Contents 1 Contents 2 2 Note 3 3 Instrument Inspection 3 4 Installation 4 4 1 Hard and Software...

Страница 3: ...specifying the relevant invoice number and serial number If you wish the operating instructions can also be sent to you by post in paper form against an applicable postage fee The devices are only to...

Страница 4: ...Windows 10 8 1 Server 2012 Server 2008 R2 7 Vista Server 2003 XP ME 98 Microsoft Excel version from 2007 32 Bit and 64 Bit version Excel Configuration Sheet NGM configuration tool LA V177 xls since 0...

Страница 5: ...2 Electrical connection The supplied HART modem must be connected on the device side via a current loop resistor 250 Ohm in the scope of supply On the PC side is a normal USB connection required Figur...

Страница 6: ...configuration of the NGM with a HART modem the baud rate of your USB communication must be reduced to 1200 bits s This is set to 9600Bit s in the standard If the parameter is not set no communication...

Страница 7: ...22 page 7 4 3 1 Connection of a NGM Probe to a PC Check the COM port assignment of the PC to the USB HART modem with the Device Manager http www computerhope com issues ch000833 htm In this case COM p...

Страница 8: ...the Excel file might help to activate the Macros 3 HOME 4 Enter the assigned COM port indicated at the device manager For the usage of the Excel tool a click on the necessary cell activates the commun...

Страница 9: ...lue SEND button J2 in step 1 get serial number Macros are running OK status H2 disappears and reappears after serial number read out and shown in G2 If OK status does not reappear check the connection...

Страница 10: ...n I6 and I7 With the command get lower upper range value the actual 4 20 mA values in mm are shown after the OK status disappeared and is visible again Change actual 4 20 mA settings by changing the v...

Страница 11: ...Configuration Set NGM HART NGM HART K05 0922 page 11 Reference point 0 mm...

Страница 12: ...is showing the actual response time multiplied with 0 1ms Change actual response time within a range of 2 100 0 2 10 sec in field G8 and clicking on I8 set response time Use high response times for s...

Страница 13: ...output mode 0 nc normally closed 1 no normally open Once the probe is powered the switch output can be open or closed The standard switch output mode is set to normally closed as it would open at a po...

Страница 14: ...reshold With the help of the thresholds a hysteresis can be programmed to avoid output switching at turbulent levels First the upper threshold must be passed to activate the output then the lower thre...

Страница 15: ...s or ringing caused by the installation can be blocked Increase the value for cutting signals left to the dead band whose position is indicated by a green line Any signal left to the green line will n...

Страница 16: ...ates the actual amplitude threshold Dynamic noise or ringing can be blocked if it is within the amplitude threshold band The level reflection should be always 1 3 bigger than the width of the amplitud...

Страница 17: ...l disturbance scan signal status 00 off raw echo curve 01 disturbance signal active on top 10 disturbance signal active on top and bottom Change actual disturbance signal scan status in field G20 and...

Страница 18: ...type status by clicking on I24 Field G24 indicates the actual probe type status 0 coaxial probe 1 single probe rod or rope Thresholds are adapted automatically by changing this parameter Change actual...

Страница 19: ...robe Length BASIC CONFIGURATION Read out actual probe length by clicking on I26 Field G26 indicates the actual probe length in mm Change actual probe length in field G25 and click on I25 set probe len...

Страница 20: ...2 5 4 6 Set Delivery Configuration BASIC CONFIGURATION Set actual parameters as delivery configuration by clicking on I27 Former delivery configuration parameters will be overwritten No reset to facto...

Страница 21: ...guration BASIC CONFIGURATION Reset unit back to delivery configuration by clicking on I28 4 20mA response time switching mode and thresholds upper dead band amplitude threshold disturbance scan probe...

Страница 22: ...tual level reading by clicking on I29 If you do not measure the current output in series with a Multimeter it is recommended to read out the level 3 5 times to recognize potential current fluctuations...

Страница 23: ...tion Set NGM HART NGM HART K05 0922 page 23 5 4 9 Software Revision BASIC CONFIGURATION Get actual software revision by clicking on I30 You can get the actual softwaretool on our homepage https www ko...

Страница 24: ...page 24 NGM HART K05 0922 5 4 10 Device Status BASIC CONFIGURATION Get actual devise status by clicking on I31 Important probe status information can be communicated Click on the small red upper righ...

Страница 25: ...al data or also called echo curve by clicking on I32 Once the OK status in field H32 does not disappear anymore the echo curve can be visualized by clicking on worksheet SIGNAL Reading out the echo cu...

Страница 26: ...signal range by entering values in field G33 34 and clicking on I33 34 Depending on the probe length the range within the echo curve in worksheet SIGNAL can be adapted A negative X1 range of 1000 is...

Страница 27: ...echo curves every second for calculating the level The most important parameters 4 20mA dead band and amplitude threshold are visualized With the arrows up down the amplitude threshold can be positio...

Страница 28: ...Configuration Set NGM HART page 28 NGM HART K05 0922 5 4 14 More Parameters ADVANCED CONFIGURATION Parameters within the worksheet ADVANCED CONFIGURATION are only recommended to change by experts...

Страница 29: ...Coaxial Probe Nice reference reflection at the beginning Perfect coupling into the coaxial probe Positive end of probe reflection which corresponds to the physical end of probe Dead band parameter at...

Страница 30: ...vel Coaxial Probe Stable reference reflection at the beginning Negative level reflection at 168mm No end of probe reflection as energy is completely reflected at water surface Dead band parameter at 3...

Страница 31: ...at the beginning Strong positive impulse at the transition of coupling to the single rod Reflection can change with mounting conditions Positive end of probe reflection which corresponds to the physic...

Страница 32: ...tion at the beginning Negative level reflection at 168mm No end of probe reflection as energy is completely reflected at water surface Positive coupling reflection in saturation as amplification facto...

Страница 33: ...55 C Enclosure Polystyrene Connection to PC USB 1 1 B connector Cable to PC USB A B 1 8 m Connection to HART filed KLEPS 2 Spiral cable length 0 6 m 1 1 m Ingress protection IP 20 Electrical protectio...

Страница 34: ...d international disposal regulations and environmental regulations Batteries Batteries containing pollutants are marked with a sign consisting of a crossed out garbage can and the chemical symbol Cd H...

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