The smart memo is a pressure test case with menu-guided test sequences for easy execution of pressure tests on test pipelines or test objects. By booking the corresponding software options, test sequences according to various standards and regulations are available. In the field of drinking water pipelines, for example, these are tests according to the Austrian ÖVGW W 101, EN 805 or tests according to the German worksheet DVGW W 400-2. Especially for the tests according to worksheet W 400-2, there are strict requirements for the measurement technology, the personnel and the execution of the test since the publication of the revision of the regulations in 08/2022. Details on the individual procedures and the requirements from Code of Practice W 400-2 can be found here.

Our testing technology based on the smart memo meets all the requirements of the current regulations and enables you to carry out the tests easily, without errors and in compliance with the regulations. Details on the measurement technology and the associated components for tests according to W 400-2 can be found here.

Nevertheless, due to the complexity of the requirements and details in the rules and regulations, errors can occur during execution, operating errors or simply unfortunate coincidences that influence the result of the test. Furthermore, according to the current rules of worksheet W 400-2, in some test procedures significantly more time must be invested in the procedure itself than before, which will increase your time or personnel expenditure. We therefore offer you the possibility of having your tests carried out fully automatically in the future. And we really mean completely automatically, i.e. start the test and let it run through to the end without any further operation. You will learn how this works in the following paragraphs.

The following basic components of our measuring devices make it possible to carry out a fully automatic pressure test on water pipelines:

  1. smart memo: The smart memo is the central operating device for carrying out the test. It acts as a command generator for the other, following components, i.e. it controls e.g. the pump and reads sensor data.
  2. Motor test pump MPP (the new generation “NGP”) e.g. MPP 30-30 or in future MPP 70-35: The MPP is used to build up the test pressure and to maintain the pressure.
  3. EDS2 sensors:
  4. EDS2-P pressure sensor: measurement and transmission of pressure data
  5. EDS2-V flow meter: measurement and digital transmission of discharge volume to the smart memo
  6. DS2-T temperature sensor: measurement and transmission of temperature data
  7. EDS2 automatic water drain: This module replaces the mechanical ball valve on the test head. It is also controlled by the smart memo and opens and closes automatically to generate a defined pressure drop, e.g. during a pressure drop test or a pressure drop in the influence-minimised standard procedure.

Except for the EDS2 automatic water drain, all components are already described here, so we will concentrate on the additional function of the EDS2 automatic water drain in the following.

Functional range EDS2 automatic water drain

The EDS2 automatic water drain is an optional module for automatically performing pressure drop tests or pressure reductions during water pressure tests. It is controlled by the smart memo and carries out pressure reduction in accordance with the regulations at the right time in the test sequence as specified by the smart memo. The measurement of the discharge quantity during the pressure reduction is not carried out by the EDS2 automatic water drain, but is carried out separately by an EDS2-V flow meter.

Test preparation

Test stand pipe and test head HANS should already be mounted. The EDS2-P pressure sensor is connected to the test head HANS. The EDS2 automatic water drain can be hooked onto the test stand pipe. If no test stand pipe is available, the module must be mounted otherwise in an upright position. The hose connection of the EDS2 automatic water drain is connected to one coupling of the HANS test head (the other coupling is connected to the pressure hose of the MPP).

The ball valve of the test head in the direction of the EDS2 automatic water drain is opened completely. An EDS2-V sensor with a suitable measuring range is plugged into the coupling on the top of the EDS2 automatic water drain. The drain hose of the EDS2-V is mounted and the outlet end should be fixed at a suitable place so that the water can drain out properly during the automatic water drain.

Sensor connection

Smart memo and MPP are connected to each other via the MPP/smart memo connection cable (article 401100).

The EDS2 automatic water drain is connected to the smart memo via a B11 5 metre connection cable (article 227002). If the valve of the EDS2 automatic water drain was not yet closed, it will close automatically after starting the smart memo (see “Default” status).

Via additional B11 connection plugs integrated on the underside of the housing of the EDS2 automatic water drain, the other EDS2 sensors can be connected by means of connection cable B11 1 meter (article 227220). You therefore do not need any additional T-connectors B11.

Basic status (default status) for EDS2 automatic water drain​

The power supply for the EDS2 automatic water drain is provided by the smart memo, no additional power source is required. The basic status of the valve in the EDS2 automatic water drain is set to “closed”. As soon as the cable connection between the EDS2 automatic water drain and the switched-on smart memo is established, the valve of the EDS2 automatic water drain basically moves to the closed status.

Menu item EDS2 water drain valve for flushing or manual opening/closing

BEFORE carrying out the test, the complete EDS2 automatic water drain, including hose line and connected EDS2-V, must be flushed (in addition to the obligatory flushing of the test stand pipe). Air components within the various parts can cause faulty feedthroughs and measurement errors of the drain quantity.

Since the default status of the EDS2 automatic water drain is set to “closed”, the valve must be opened manually to flush the components. To do this, the menu item “EDS2 water drain valve” appears in the main menu of the smart memo after connecting the EDS2 automatic water drain. In this menu item, the valve can be opened for the flushing process by pressing “Open” (F1 key) once. Now, for example, the flushing process can be carried out via “manual operation” on the MPP 30-30 with a low-speed setting. In this way, you also bleed the MPP at the same time, if this has not yet been done!

When you return to the main menu of the smart memo, the valve of the EDS2 automatic water drain automatically returns to the closed status.