ecom-DP Digital Pressure Measurement Instruction Manual

Setting Clock

The internal clock and the internal RAM memory of the ecom-DP are buffered via a capacitor. If the instrument is without current supply during more than approx. 10 minutes, the recorded information gets lost. Before using the ecom- DP for the first time, adjust the internal clock and delete the internal RAM memory.

Press to switch on the ecom-DP. The instrument displays the following:

• Clock set

• Delete RAM

• Press OK to continue!

• Press twice the key and the measurement value menu will be displayed.

• Press (wrench symbol) to call up the menu “In-strument settings”.

• With the cursor keys <UP/DOWN> scroll until the menu point “Set clock”.

• Press to activate.

Date and time can be set as follows:

1. Select with the cursor keys <RIGHT/LEFT> the position to be changed (corresponding field blinks).
2. Adjust the correct numbers with the cursor keys <UP/DOWN>.
3. Press to confirm correct date and time settings.

Numerical Indication

If “Pressure Auto -> O by start” is set on “YES”, so the internal pressure sensors should be flown with pressure first after the switch-on of the instrument, as they are zeroed during said switch-on procedure.

After switch-on, the specifications of the pressure sensor will be displayed: denomination, measurement range and connection seizure (+/-). Press to access to the measurement value menu.

1. Before making measurements, the instrument must have adapted the ambient temperature!
2. Make sure, that the ambient temperature remains constant during measurement!

Zeroing the Internal Pressure Sensor

If the instrument is attached to a metal surface with the magnetic holders, the zero point may shift.
Please reset the zero point before measurement.

As the difference pressure sensor can drift because of its sensitivity in the zero point (also by attaching to met-al surfaces by magnetic holder), it is possible to reset the zero point.

• Press (DP->0) to activate the function for zero point correction of the pressure sensors.
• Press (DP1) to zero the value of the pressure sensor 1.
• Press (DP2) to zero the value of the pressure sensor 2.
• Press (ESC) to quit the menu.

Different functions can be called up with the function key . The current seizure of the other function keys ( – ) is shown on the display. Press one time to display the functions “Hold”, “Min/Max” and “Print”.

Freezing of Measurement Value

• Press (Hold) to “freeze” that measurement value displayed at the time the key is pressed (active function = Hold indication blinks).
• Press again (Hold) to quit the “freezing” and the current value will be displayed.

Minimal / Maximal Measurement Values

With (Min/Max) the determined minimal and maximal values since unit switch-on (or deleting via “CLR”) can be called up.

• Press one time (Min/Max) to view the lowest determined values (Min/Max blinks).
• Press (CLR) to delete the minimal values (new scanning begins).
• Press again (Min) to view the highest values (Min/Max blinks).
• Press (CLR) to delete the highest values (new scanning begins).
• Press one more time (Max) to quit the menu.

Measurement Values Printout

Press (Print) to transmit the current measurement values via the infrared interface to the IR printer (option).
Condition hereto is a trouble free connection (direct sight) between the sending diode at the front of the instrument and the receiving diode of the printer. The distance between both instruments should not exceed 40 cm (1.3 foot), otherwise a trouble free transmission is not warranted at any time.

Contrast Adjustment and Lighting

Basing on the previous function seizure, the functions “LUMI” and “Light” are displayed after pressing . The graphic display of the ecom-DP can be adjusted to different visual conditions. The contrast can be adjusted in 5 steps (each key pressing = one step) while pressing (LUMI). Additionally the backlighting of the display can be activated while pressing (Light).

Check Programs

1. Use only air or inert gas for check !
2. Respect the “Technical Rules for Gas installations!”

Call up the pre-programmed measurement routines “Preliminary Check”, “Main Check” and “Usability Check” in the menu (PROC).
Parameters to each measurement routine can be adjusted in the menu “Setup”.

Setup

Scroll with <UP/DOWN> until the menu “Setup”. Press to activate the menu. The following parameters can be adjusted for the corresponding measurement routine:

Pressure Check

• Stabilization time (1 – 10 min, default: 1 min)
• Measurement time (10 – 120 min, default: 5 min)

Preliminary Check

• Stabilization time (1 – 10 min, default: 1 min)
• Measurement time (10 – 120 min, default: 10 min)
• Test pressure (900 – 1200 hPa, default: 1000 hPa)

Main Check

• Stabilization time (1 – 10 min, default: 1 min)
• Measurement time (10 – 120 min, default: 10 min)
• Test pressure (90 – 160 hPa, default: 110 hPa)

Usability Check

• Stabilization time (1 – 270 min, default: 1 min)
• Measurement time (10 – 240 min, default: 10 min)
• Test pressure (20 – 160 hPa, default: 50 hPa)
• Max. operation pressure (10 – 100 hPa, default: 20 hPa)
• Air pressure (800 – 1200 hPa, default: 1013 hPa)

Each parameter can be adjusted the same way:

1. Select the parameter with <UP/DOWN>.

2. Press to activate.

3. Use the cursor keys <RIGHT/LEFT> to select the position to be changed (corresponding field blinks).
   

4. Adjust the correct figure using <UP/DOWN>.

5. Press to confirm the corrected value.
   

Pressure Check

Proceed as follows:

1. Close the conduit with a suitable adapter (part of ecom-DPK).
   

2. Connect the components a described in ecom-DPK manual.

3. Scroll with <UP/DOWN> until the menu “Pressure check”. Activate with -Taste.

4. With the compressed-air pump create the pre-adjusted test pressure (the unit beeps as soon as the pressure level is achieved).

5. Interrupt the connection to the air pump (switch-off the ball valve).
   

6. Wait for stabilization time (if the pressure remains in the range “test pressure +/- 10% during stabilization time, so the measurement time will start).
   

7. Once the measurement time is over, the result is displayed and can be sent to the IR printer (option) thus pressing (Print).
   

8. If the menu “Pressure Check” is selected again, so the result can be called up with (as long as the ecom-DP is on) or a new measurement can be started with .
   

Preliminary Check

The preliminary check acc. to DVGW – TRGI Process Instructions G 600 by pipes (operation pressure up to 100 hPa) is registered as a measurement routine in the ecom-DP.

Proceed as follows:

1. Close the conduit with a suitable adapter (part of ecom-DPK).
   

2. Connect the components a described in ecom-DPK manual.

3. Scroll with <UP/DOWN> until the menu “Preliminary check”. Activate with -Taste.

4. With the compressed-air pump create the pre-adjusted test pressure (the unit beeps as soon as the pressure level is achieved).

5. Interrupt the connection to the air pump (switch-off the ball valve).

6. Wait for stabilization time (if the pressure remains in the range “test pressure +/- 10% during stabilization time, so the measurement time will start).

7. Once the measurement time is over, the result is displayed and can be sent to the IR printer (option) thus pressing (Print).

8. If the menu “Preliminary Check” is selected again, so the result can be called up with (as long as the ecom-DP is on) or a new measurement can be started with .

Main Check

The main check acc. to DVGW – TRGI Process Instructions G 600 by conduits (operation pressure up to 100 hPa) is registered as a measurement routine in the ecom-DP. Proceed as follows:

1. Close the conduit with a suitable adapter (part of ecom-DPK).

2. Connect the components a described in ecom-DPK manual.
   

3. Scroll with <UP/DOWN> until the menu “Main Check”. Activate with -Taste.

4. With the compressed-air pump create the pre-adjusted test pressure (the unit beeps as soon as the pressure level is achieved).

5. Interrupt the connection to the air pump (switch-off the ball valve).
   

6. Wait for stabilization time (if the pressure remains in the range “test pressure +/- 10% during stabilization time, so the measurement time will start).

7. Once the measurement time is over, the result is displayed and can be sent to the IR printer (option) thus pressing (Print) .
   

8. If the menu “Main Check” is selected again, so the result can be called up with (as long as the ecom-DP is on) or a new measurement can be started with .
   

Usability Check

The usability check acc. to DVGW – TRGI Process form G 624 by conduits is memorized as a measurement routine by the ecom-DP. The calculation of the leak rate happens automatically according to the following equation and corresponds herewith to the procedure of the DVGW-TRGI Process Form G 624:
*VB = V/TM ((PA + P1)/(PA + P2)-1) PB/P1 f**

with: VB = Gas leak volume in operation state (l/h)
V = Pipe content in litres
TM= Measurement duration in hours
PA = Barometer stand in hPa
P1 = Test pressure at meas. beginning in hPa
P2 = Test pressure at measurement end in hPa
PB = Maximal gas operation pressure in hPa
f = Factor for consideration of gas type

Proceed as follows:

1. Close the conduit with a suitable adapter (part of ecom-DPK).

2. Connect the components a described in ecom-DPK manual.

3. Scroll with <UP/DOWN> until the menu “Suitability/Leak rate”. Activate with .
   

4. The pipe volume to be checked (V) is needed for the calculation of the leak rate. The ecom-DP offers two input possibilities:

   • Direct input of pipe volume after having pressed (ADD) (by repeated input the value will be added).
     

   • The ecom-DP will calculate the pipe volume in sections basing on the diameter and the length for thread pipe acc. to DIN 2440 (middle heavy):
     

   • Press (CAL).

   • Use <UP/DOWN> to select the pipe diameter (1/2″ to 4″) and confirm with .

   • Select pipe length with the cursor keys and confirm with .

   • The volume for thread pipe acc. to DIN 2440 (medium heavy) will be calculated and added.

   • Repeat procedure until all pipes sections are registered.

5. Quit the volume input with .
   

6. The maximal operation pressure adjusted in the set-up (PB) will be displayed. If need be, the value can be changed using the cursor keys. Confirm the value with .

7. The air pressure (PA) adjusted in the setup is dis-played. If need be, the value can be changed using the cursor keys. Confirm with .
   

8. Use <UP/DOWN> to select the used gas type (f) and confirm with . The following gas types are record-ed with their respective factors:

   • Natural gas
   • Air
   • City gas
   • Propane
   • Butane
   • Hydrogen

9. With the compressed-air pump create the pre-adjusted test pressure (the unit beeps as soon as the pressure level is achieved).
   

10. Interrupt the connection to the air pump (switch-off the ball valve).

11. Wait for stabilization time (if the pressure remains in the range “test pressure +/- 10% during stabilization time, so the measurement time will start).

12. Once the measurement time is over, the result is displayed and can be sent to the IR printer (option) pressing (Print).

13. If the menu “Usability Check” is selected again, so the result can be called up with (as long as the ecom-DP is on) or a new measurement can be started with .
    

Clock Set

• Scroll with <UP/DOWN> until the menu point “Set clock”.

• Press to activate. Date and time can be adjust-ed as follows:

  1. Select with <RIGHT/LEFT> the position to be changed (corresponding field blinks).

  2. Adjust the correct figures using <UP/DOWN>.

  3. Confirm with .

Internal Instrument Settings

Further instrument settings can be performed in the menu “Internal”. Press