Instruction Manual Dräger MSI ALV

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Instruction Manual Dräger MSI ALV

Dräger Safety MSI GmbH Rohrstraße 32

D - 58093 Hagen

Tel.: 049-2331 / 9584 - 0 Fax: 049-2331 / 9584 - 29 e-mail: [email protected]

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Any use of a Dräger MSI 150 PRO2 with option " Pipe Leak Test ", requires a full under-standing 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 calcu-lation of the leak rate of the gas pipe. From the leak rate follows the calcucalcu-lation of the vol-ume of the gas pipe.

The leak volume and the volume of the gas pipe are displayed and may be printed to-gether with date and time.

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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 selec-tion 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.)

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3. Automatic Tightness Test

After choosing " Tightness test ", the display reads: Tightness

Connect hoses

Start Cancel

With "!" (Cancel) 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".

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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 65.4 mbar

T 21 s

Cancel

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 "!" (Cancel) 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 113.5 mbar

T 20 s

Cancel

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 "!" (Cancel) 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 113.5 mbar P 113.5 mbar T 89 s Cancel

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 "!" (Cancel) you may cancel the " Tightness Leak Test" and skip to "Pipe Leak Test".

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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 10 min

Start 113.5 mbar

End 113.5 mbar

Stab.time 2 min Cont. Cancel

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 "!" (Cancel) 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.

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4. Leak Rate Measurement

After choosing " Leak rate ", the function "Determination of Gas Type and Pressure Refer-ence 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 22.00 mbar

Cont. + - With "

▲

" or "!" you may change the pressure reference value.

With pushing "F" (Continue) the displayed pressure reference value is accepted, the pur-ge pump of the PRO2 starts working and closes the pneumatic valve in the ALV.

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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. Cancel

With "!" (Cancel) 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.

Leckmenge ►

Leak volume

Leak measurement adapter ALV

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.

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After you have pushed "F" (Cont.) the display reads: Purge

P 22.54 mbar

t 5 sek.

Cancel

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 22.54 mbar

t 75 sec. dP 0.04 mbar

Cancel

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 val-ues mean the pressure in the gas pipe has risen).

If a sufficient stabilization is achieved (dP < 1% of the gas pressure) the stabilization pe-riod will be finished and the measuring of the leak rate is started (4.4).

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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. Cancel

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 ambi-ent air temperature.

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 18.62 mbar dP 0.29 mbar 55 sec.

Cancel After 60 seconds the leak measurement is automatically started.

The start of the measurement will be announced acoustically, the display reads: Leakage measurement

P 22.54 mbar

t 75 sek.

dP 0.04 mbar

Cancel

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.

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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 20. 40 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 "Stabiliza-tion" (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.

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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 choos-ing 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 calibra-tion.

Disconnect hose from ALV, switch off Dräger MSI 150 PRO2 and switch it on again.

Service Pump time overflow

or

Pressure cannot be developed

pressure generation lasts too

long Connect hose between ALV and gas pipe Tighten the plug of the gas pipe

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6. Technical Data

6.1 Technical Data ALV

Humidity: 10 - 90 % RF not condensing barometric pressure: 800 ... 1100 hPa

Operating temperature: +5 °C ... + 40 °C Storage temperature: -20 °C ... + 50 °C

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: 0,3 bis 0,5 Liter / min Test pressure: 110,1 bis 119,9 mbar

Resolution: 0,1 mbar

Stabilisation time: 2 … 10 min, depends of pressure change

Measuring time: 10 min

6.3 Technical Data Leak Rate Measurement Gas types: natural gas, propane, air

Leak rate Range: 0 ... 10 l / h Resolution: 0,01 l / h Volume Range: 1... 300 l Resolution: 0,1 l Pressure Range: 10 ... 100 mbar Resolution: 0,1 mbar

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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 re-quested 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 5600401 Paper for IR-Printer 5690151

Consumable set 2 5600411

consisting of:

10 x Disc filter 20 x Filter fleece ø 26

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Instruction Manual Dräger MSI ALV

Instruction Manual Dräger MSI ALV

Contents

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F

▲

F

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