Dräger P7-TDX Quick Reference Manual

Dräger MSI GmbH Tel.: [phone] / 9584 - 0 5695071
Rohrstr. 32 Fax: [phone] / 9584 – 29 Edition 02 – January 2019 (Edition 01 – May 2017)
58093 Hagen Email: [e-mail] en

Dräger P7-TDX – Quick Reference Guide

Any use of the Dräger P7-TDX requires the full understanding of and compliance with the
instruction manual 5695070 (P7-TDX) for this device.

The instruction manual can be found on our website www.draeger-msi.de/en in the menu item
Services >Downloads>P7 >Operating Instructions.
You can find the measurement data management software PC200P, which you can download after a brief
registration using your device number and your address data, in the menu item Services >Downloads >P7>

Software.

Only charge the Dräger P7 using the corresponding charger.

Key functions

Switching on: Simultaneously press the keys “F” and “H” for 1 second.
Switching off: Press the “F” key for more than 3 seconds or select “Switch off” in the “Functions” area.

All other key functions are shown on the display directly using the keys!

Functions

The individual tests and measurements are accessed via the “Functions” menu.

Pressure measurements

1. High pressure up to 0.35 MPa (3.5 bar)

Use pressure hose with pneumatic quick coupling NW5

2. Medium pressure up to 150 hPa (mbar)

3. Micro pressure up to 100 Pascal

4. Medium pressure up to 150 hPa (mbar) with pump function

5. High pressure up to 2.5 MPa (25 bar) (with external high pressure sensor)

6. Pressure monitor

7. Differential pressure (+/- 2 MPa (20 bar))

Follow the instructions for the Dräger P7 for pipeline testing!

Manual tightness test with absolute pressure and temperature compensation

Test pressure, stabilization period and measurement period can be set during the manual tightness test.

1. Select measuring channel 0 - 150 hPa (mbar), 0 - 3,500 hPa (mbar) or 0 - 25,000 hPa (mbar)

2. Select test pressure: 10 - 150 hPa (mbar), 100 - 3,500 hPa (mbar) or 1,000 - 25,000 hPa (mbar)
If a tightness test was selected in the 0 - 150 hPa (mbar) measuring channel, the internal or an external
pump can be used, to build up the test pressure. Tests with the 3,500 hPa (mbar) or 25,000 hPa (mbar)
channels can only be conducted using an external pump.

3. Select stabilization period: 00:01 - 48:00 h

4. Select measurement period: 00:01 - 48:00 h

5. Enter temperature correction factor: 0 - 100% (only effective if temperature sensor is connected)
The percentage of the exposed pipeline can be entered for partially underground pipelines (constant
temperature). Only the temperature change in the exposed pipeline is then corrected.

Dräger MSI GmbH Tel.: [phone] / 9584 - 0 5695071
Rohrstr. 32 Fax: [phone] / 9584 – 29 Edition 02 – January 2019 (Edition 01 – May 2017)
58093 Hagen Email: [e-mail] en

Gas pipelines:

1. Serviceability (TRGI G 600) without dismantling the gas meter

Gas leak rate < 1l/h = unrestricted serviceability
Gas leak rate 1 l/h < 5 l/h = reduced serviceability (repair within 4 weeks)
Gas leak rate > 5 l/h = no serviceability (shut down immediately)
The actual operating pressure must be set as the nominal operating pressure for operating
pressures > 30 hPa (mbar); otherwise the operating pressure must be set to 23 hPa (mbar).
Use “leak measurement with regulator in line” for pipelines with a pressure regulator. The test pressure
is released under operating pressure, to fully open the regulator. The quick test and the measurement
for expanded volume are not DVGW (German competence network for all questions related to gas
and water supply) tested and cannot be stored. Depending on the stability in the gas pipeline, a quick
test can be conducted in approx. 7 minutes. The measurement for expanded volume enables
measuring pipelines with up to 800 liters of volume.

2. Automatic tightness test (TRGI G 600) 150 hPa (mbar)

3. Tightness test with external pump (TRGI G 600) 150 hPa (mbar)

Our recommendation for pipeline volumes exceeding 100 l.

Adaptation time and test duration for tightness tests according to TRGI G 600

4. Stress test (TRGI G 600) 0.1 MPa (1 bar) (0.3 MPa (3 bar) for medium pressure systems)

always with external pump
Use pressure hose with pneumatic quick coupling NW5.
Stabilization period 2 - 10 minutes
Measurement period 10 minutes
Medium pressure systems: Stabilization period: 180 minutes
Measurement period: 120 minutes
The test duration must be prolonged by 15 minutes per additional 100 l of pipeline volume for
medium pressure systems with pipeline volumes exceeding 2000 l.

LPG pipelines:

1. Automatic tightness test (TRF) 150 hPa (mbar)

Stabilization period 10 minutes
Measurement period 10 minutes

2. Tightness test with external pump (TRF) 150 hPa (mbar)

Stabilization period 10 minutes
Measurement period 10 minutes

3. Strength test (TRF) 0.1 MPa (1 bar) 10 minutes for pipelines above ground

always with external pump
Use pressure hose with pneumatic quick coupling NW5.
Stabilization period 10 minutes
Measurement period 10 minutes

4. Strength test (TRF) 0.1 MPa (1 bar) 10 minutes for partially underground pipelines

always with external pump
Use pressure hose with pneumatic quick coupling NW5.
Stabilization period 30 minutes
Measurement period 10 minutes

Pressure Volume Adaptation time

Test

duration

150 hPa (mbar) < 100 l

10 min 10 min

150 hPa (mbar)

≥ 100 l
< 200 l

30 min 20 min

150 hPa (mbar) ≥ 200 l

60 min 30 min