Instruction Manual Dräger MSI ALV

Transcription

1 Dräger Safety MSI GmbH Rohrstraße 32 D Hagen Tel.: / Fax: / info@draeger-msi.de D 914; Edition

2 Contents 1. Hints page 2 2. Pipe Leak Test page 3 3. Automatic Tightness Test page 4 4. Leak Rate Measurement page Determination of Gas Type and Pressure Reference Value 4.2 Preparing for Leak Rate Measurement page Stabilization page Measurement of the Leak Rate page Result of Leak Rate Measurement page Finish Leak Rate Measurement page Error Messages 6. Technical Data page Maintenance and Service page 14 D of 15 Edition

3 1. Hints Any use of a Dräger MSI 150 PRO2 with option " Pipe Leak Test ", requires a full understanding and strict adherence to this instruction manual, to the manual of the Dräger MSI 150 PRO2 and to national and international standards. Observe especially the regulations concerning the handling of explosive gases. The instrument is only to be used for the purposes specified in here. 1.1 Automatic Tightness Test The Dräger MSI ALV together with the stack gas analyzer Dräger MSI 150 PRO2 makes it possible to do a tightness test completely automatic. The user has to connect the gas pipe with the Dräger MSI ALV by only one pressure tube. The pressure in the gas pipe then will be pumped up to a little more than 110 mbar automatically. After a time of stabilization for temperature equalization etc. the pressure in the gas pipe will be measured for 10 min, without that the user has to open or close a valve. After the measurement the pressure at the beginning and at the end of the measurement (after 10 minutes) is displayed. The result together with date and time may be printed. 1.2 Leak Rate Measurement The Dräger MSI ALV together with the stack gas analyzer Dräger MSI 150 PRO2 makes it possible to measure the leak rate of a gas pipe at operating pressure. The used method is patent pending. After closing all valves of the gas consumer loads the user has to connect the gas pipe with the Dräger MSI ALV by only one pressure tube. After a time of stabilization for temperature equalization etc. the analyzer asks the user to close the gas supply (e. g. main valve direct behind the gas meter). The instrument measures the pressure in the gas pipe and opens after an automatically calculated period an comparison leak. The measured pressure variation with and without the comparison leak leads to the calculation of the leak rate of the gas pipe. From the leak rate follows the calculation of the volume of the gas pipe. The leak volume and the volume of the gas pipe are displayed and may be printed together with date and time. Edition of 15 D 914

4 2. Pipe Leak Test If this function is not part of the instrument, use the Dräger MSI Set-up-CD and a PC for installing the new firmware into the Dräger MSI 150 PRO2. See the instructions on the CD (pdf-file). After switching on the Dräger MSI 150 PRO2 (see Instruction Manual Dräger MSI 150 PRO2), call the menu of functions by pushing "! ", if the PRO2 shows the fuel type selection menu. The display will read: Functions Reset Pipe leak test Qa average Stack leak test Cont. With pushing " " you may mark the function " Pipe Leak Test ". with " F " you start this function and the display reads: Pipe leak test Leak rate Tightness End Sel. With pushing " " ( ) you may mark the wanted function. With " F " (Selection) you may start the marked function. Selectable functions are: End = calls "Menu of Functions" (see Instruction manual of Dräger MSI 150 PRO2) Tightness = calls "Automatic Tightness Test" (see 3.) Leak rate = calls "Automatic Leak Rate Test" (see 4.) D of 15 Edition

5 3. Automatic Tightness Test After choosing " Tightness test ", the display reads: Tightness Connect hoses Start With "!" () you may stop the "Tightness test " and skip to "Pipe Leak Test" (see 2). By pushing "F" (Start) you may start the " Tightness test ". Mount the Leak measurement adapter ALV onto the gas outlet and the pressure inlet of the PRO2 so, that you are able to read the words "Hauptprüfung" and "Tightness", during you are looking onto the display of the PRO2. Hauptprüfung Tightness Leak measurement adapter ALV Gas outlet Pressure inlet Put the hose coupling of the supplied pressure probe on the upper connector of the Dräger MSI ALV and mount the hose of the pressure probe on the nipple of the gas pipe. Now you may start the "Tightness Test". Edition of 15 D 914

6 Immediately after you started the test the flushing pump of the PRO2 begins to increase the pressure in the gas pipe. The display reads: Tightness Pumping P T 65.4 mbar 21 s The display shows that the pump is working and it informs you about the actual pressure in the tested gas pipe (P) and how much time has passed since the pump starts (T). With "!" () you may cancel the " Tightness Test" and skip to "Pipe Leak Test". If the pressure in the tested gas pipe exceeds 115 mbar, the flushing pump of the PRO2 is automatically stopped and the valve in the ALV closes. Now starts the stabilisation period (2 until 10 minutes) to get temperature balance. During this stabilisation period the display reads: Tightness Stabilisation P T mbar 20 s The display shows that the stabilisation time is running and it informs you about the actual pressure in the tested gas pipe and for how many seconds stabilisation is running. With "!" () you may cancel the " Tightness Test" and skip to "Pipe Leak Test". Is the temperature balance reached, the PRO2 switches to measurement mode. During this the display reads: Tightness Measurement Start mbar P T mbar 89 s The display shows that the measurement is running and it informs you about the pressure at the beginning (Start), the actual pressure (P) and how long the measuring is running. With "!" () you may cancel the " Tightness Leak Test" and skip to "Pipe Leak Test". D of 15 Edition

7 After 10 minutes of measuring the " Tightness Leak Test" is automatically finished and the next display screen is called and the display will read e.g.: Tightness Test time Start End Stab.time Cont. 10 min mbar mbar 2 min The display informs you how long the measuring has been done (Test time), about the pressure at the beginning (Start), the pressure at the end of the measurement (End) and how long stabilisation has needed (Stab.time). With "!" () you may cancel the " Tightness Test" and skip to "Pipe Leak Test". After pushing the key "F" (Continue) the display reads: Print NO YES With "F" (NO) you skip to the last display screen. After pushing the key "!" (Yes) the printout of the Tightness Test is done together with date and time. After that the instrument switches to the last display screen. Edition of 15 D 914

8 4. Leak Rate Measurement After choosing " Leak rate ", the function "Determination of Gas Type and Pressure Reference Value" is started immediately. 4.1 Determination of Gas Type and Pressure Reference Value After the start of this function the display reads: Select gas Air Propane Natural Gas Cont. With " " ( ) or "!" ( ) you mark the gas type. With pushing "F" (Continue) the marked gas type is chosen The display now reads: Select nom. pressure Pn mbar Cont. + - With " " or "!" you may change the pressure reference value. With pushing "F" (Continue) the displayed pressure reference value is accepted, the purge pump of the PRO2 starts working and closes the pneumatic valve in the ALV. Now the function "Preparing for Leak Rate Measurement " (see 4.2) is called D of 15 Edition

9 4.2 Preparing for Leak Rate Measurement If "Preparing for Leak Rate Measurement" has been called, the display reads: Connect ALV P 0.08 mbar Cont. With "!" () you may cancel the "Leak Rate Measurement " and skip to "Finish Leak Rate Measurement" (see 4.6). Mount the leak rate measurement adapter ALV onto the gas outlet and the pressure inlet of the PRO2, so that you are able to read the words "Leckmenge" and "Leak volume" if you are looking onto the display of the PRO2. Leak measurement adapter ALV Leckmenge Leak volume Gas outlet Pressure inlet Put the coupling of the pressure probe on the lower connector of the ALV and mount the hose of the pressure probe on the nipple of the gas pipes plug. Open the plug, the PRO2 now displays in the second line the current pressure in the gas pipe. Observe national and international regulations concerning the handling of explosive gases. Edition of 15 D 914

10 After you have pushed "F" (Cont.) the display reads: Purge P t mbar 5 sek. After 5 seconds the purge pump of the PRO2 is stopped and the pneumatic valve in the Dräger MSI ALV opens. Now gas exhausts from the gas pipe through the capillary tube in the ALV. The gas gets to the air through the small holes on top of the Dräger MSI ALV. (Observe national and international regulations concerning the handling of explosive gases). After 15 seconds the purge pump of the PRO2 starts again and the pneumatic valve in the Dräger MSI ALV is closed. The capillary tube (comparison leak) now is filled with gas from the gas pipe. The Dräger MSI 150 PRO2 now skips to " Stabilization " (see 4.3). 4.3 Stabilization The measuring system waits for stabilization of the gas pressure (ca. 2 to 6 min.) et al. to get temperature balance. The display reads now: Stabilise P t dp mbar 75 sec mbar The display informs you about the current pressure in the gas pipe, how much time has passed since the stabilization period started and the decrease of pressure (negative values mean the pressure in the gas pipe has risen). With "!" () you may cancel the "Leak Rate Measurement " and skip to "Finish Leak Rate Measurement" (see 4.6). If a sufficient stabilization is achieved (dp < 1% of the gas pressure) the stabilization period will be finished and the measuring of the leak rate is started (4.4). D of 15 Edition

11 4.4 Measurement of the Leak Rate The end of the stabilization period will be announced acoustically, the display reads now: Close main valve P 18,62 mbar dp 0,29 mbar T 25,3 C Cont. The measuring system asks to close the gas supply (e. g. main valve direct behind the gas meter), and informs about the current pressure, the pressure decrease and the ambient air temperature. With "!" () you may cancel the "Leak Rate Measurement " and skip to "Finish Leak Rate Measurement" (see 4.6). If the gas supply has been closed and the gas pipe has a leak, the PRO2 with ALV will recognize a pressure decrease. If the pressure decrease is > 0,4 mbar, the measurement will start immediately. If the gas pipe is tight or the volume of the pipe very large and the leak very small ( > very small pressure decrease), you may push "F" (Cont.). The display now reads: Start measurement P mbar dp 0.29 mbar 55 sec. After 60 seconds the leak measurement is automatically started. The start of the measurement will be announced acoustically, the display reads: Leakage measurement P mbar t 75 sek. dp 0.04 mbar With "!" () you may cancel the "Leak Rate Measurement " and skip to "Finish Leak Rate Measurement" (see 4.6). The display informs you about the current pressure (P) in the gas pipe, how much time has passed since the measurement has been started (t) and the decrease of pressure dp. Edition of 15 D 914

12 If the pressure decrease in the gas pipe is > 0,9 mbar or the measurement lasts longer than 5 minutes, then the purge pump is stopped and the pneumatic valve in the Dräger MSI ALV is open. Now gas from the gas pipe will exhaust through the comparison leak. The leak rate of the comparison leak is about 5 l/h. The begin of the comparison leak measurement is announced acoustically. The gas gets to the air through the small holes on top of the Dräger MSI ALV (Observe national and international regulations concerning the handling of explosive gases). The display of the Dräger MSI 150 PRO2 reads: Comparison P mbar t 15 sec. dp 0.14 mbar Abbr. After the comparison leak measurement (dp > 0,9 mbar or t > 5 minutes) the purge pump is started, the pneumatic valve closes and the "Result of the Leak Rate Measurement" is called. The end of the comparison leak measurement is announced acoustically. 4.5 Result of the Leak Rate Measurement If the Result of the Leak Rate Measurement has been called the display reads: Result P 21.8 mbar L(P) 0.01 l/h L(n) 0.02 l/h Vol 13.5 l End New Print You are informed about the mean pressure value "P" during the leak rate measurement, the measured leak rate "L(P)", the calculated leak rate for the pressure reference value "L(n)" and the measured volume "Vol" of the gas pipe. With "F" (End) you may finish the "Leak Rate Measurement" and skip to "Finish Leak Rate Measurement" (see 4.6). With " " (New) you may start a new leak rate measurement. The PRO2 will ask you to open the gas supply (e. g. main valve) and skips after pushing "F" ( Cont.) to "Stabilization" (see 4.3). By pushing "!" (Print) the printout of the measurement results is started. After the printing the above readout of the display is called again. D of 15 Edition

13 4.6 Finish Leak Rate Measurement If the Leak Rate Measurement has been finished or cancelled the display reads: Please disconnect hose and shut gas pipe. Cont. Close the plug of the nipple of the gas pipe and remove the hose. Observe national and international regulations concerning the handling of explosive gases. By pushing "F" (Cont.) you may leave the leak rate measurement and the menu for choosing the functions leak rate or tightness (see 2.) is called. 5. Error messages The Dräger MSI 150 PRO2 with the option Pipe Leak Test recognizes the following errors: Message Error Remedy P-Sensor Signal of pressure sensor too high during zero calibration. Disconnect hose from ALV, switch off Dräger MSI 150 PRO2 and switch it on again. Pump time overflow or Pressure cannot be developed pressure generation lasts too long Service Connect hose between ALV and gas pipe Tighten the plug of the gas pipe Service Edition of 15 D 914

14 6. Technical Data 6.1 Technical Data ALV Humidity: barometric pressure: Operating temperature: +5 C C Storage temperature: -20 C C % RF not condensing hpa Dimensions: 105 mm x 50 mm x 15 mm (L x H x W) Weight: 140 g 6.2 Technical Data Tightness Test Pump power: Test pressure: Resolution: Stabilisation time: Measuring time: 0,3 bis 0,5 Liter / min 110,1 bis 119,9 mbar 0,1 mbar 2 10 min, depends of pressure change 10 min 6.3 Technical Data Leak Rate Measurement Gas types: natural gas, propane, air Leak rate Range: l / h Resolution: 0,01 l / h Volume Range: l Resolution: 0,1 l Pressure Range: mbar Resolution: 0,1 mbar D of 15 Edition

15 7. Maintenance and Service 7.1 Service In order to assure accurate measurements and the reliability of the functions the Dräger MSI 150 PRO2 together with the leak test adapter ALV should be checked and if requested be calibrated by an authorised service point once a year. (See instruction manual of PRO2 too) 7.2 Consumables and accessories Printer with infra-red data transmission Paper for IR-Printer Consumable set consisting of: 10 x Disc filter 20 x Filter fleece ø 26 Edition of 15 D 914

16 Remarks: D of 15 Edition