Hydac HMG 2500 Portable Data Recorder, 4 Sensor Inputs

Hydac HMG 2500 portable data recorder with four sensor inputs

The Hydac HMG 2500 is a portable measuring and data acquisition instrument for hydraulics and pneumatics. It is built for maintenance, commissioning and service engineers who need to measure pressure, temperature and flow, record the curves and document the result. The unit has a 3.5 in. colour display, four sensor inputs and automatic recognition of HYDAC sensors, so the engineer connects a pressure transmitter, a temperature transmitter or a flow sensor and the HMG 2500 sets the measured variable, range and unit on its own. It records up to 500,000 values per measurement and stores at least 100 curves. Seven Star LLC supplies Hydac products in Oman and the GCC as an independent supplier in Muscat.

HMG 2500 technical specifications

HMG 2500 ordering code and sensors

The ordering code on the data sheet is HMG 2500 – 000 – X, where the last letter selects the language of the operating manual and documentation: D for German, E for English and F for French. The instrument itself is the same in all cases. Sensors and accessories are not part of the delivery and must be selected to suit the task. The HMG 2500 accepts HYDAC HSI analogue sensors, including pressure transmitters, temperature transmitters such as the ETS 4100-H, and flow sensors, as well as SMART sensors for condition monitoring, which carry more measured variables. The fourth input takes a digital signal for speed or frequency.

Measuring modes and functions

The data sheet describes several measurement modes. Normal measuring shows the live values. Fast curve recording captures dynamic events at high sampling rates, such as pressure peaks when a valve switches. Long-term measurement records slowly changing values over hours. Two independent triggers can be combined logically to start a recording on an event, for example when pressure on one channel passes a limit while a second channel is above a threshold. The virtual channel E calculates the difference between channels A and B, or hydraulic power from pressure and flow.

The display can show values as numbers, curves or text, with zoom, ruler and differential value tools, and user settings can be stored and loaded again so that repeat measurements on a machine are made under identical conditions. The unit can be updated with future software, a point mentioned by the maker as an advantage for the user.

HMGWIN software and PC connection

The HMGWIN software is supplied with the instrument and runs on Windows from Vista and XP up to Windows 10 as stated in the data sheet. The software analyses and archives recorded curves, can overlay a new curve with an earlier one to document wear, and can add calculated curves through mathematical and filter functions. A snapshot function saves the graph as a jpg file, and the software can build a measurement report as a PDF with table of contents, descriptions and graphs. In online mode, the PC can start and display measurements live, similar to an oscilloscope. Connection is by the built-in USB or RS 232 interface.

Where HMG 2500 fits in a service toolkit

The HMG 2500 belongs to the HMG range, which also includes the HMG 5X0 pocket instruments, the HMG 30X0 and the HMG 4000. For simple spot checks, a handheld with fewer channels may be enough; for diagnostics that need four inputs, fast sampling and trigger recording, the HMG 2500 is the practical choice. It works with the HDA pressure transmitters, the EVS flow transmitters and the ETS temperature transmitters, and with the CS ContaminationSensors through HSI.

Selection and ordering checklist for HMG 2500

• Documentation language: German, English or French.
• Number and type of sensors: pressure, temperature, flow, SMART or digital speed signal.
• Pressure ranges of the transmitters, to cover the system test pressure with margin.
• Cables, adapters, test points and carrying case from the accessories catalogue.
• Calibration certificates or recalibration intervals required by the maintenance procedure.

Use, care and maintenance of the HMG 2500

The instrument has an IP 40 rating, which means it is for use in a service environment and not for splashing water or dust deposits, so carry it in its case and clean the connectors before use. Operating temperature is 0 to +50°C, so avoid leaving it in a vehicle in the Gulf summer sun or on a hot hydraulic unit. Check the power supply before site visits, check the sensor cables and sockets, and use the correct ranges to avoid overloading transmitters. Check the sensors at intervals according to the maintenance schedule, since the stated accuracy applies to the instrument input and the sensors add their own error.

HMG 2500 applications in Oman and the GCC

Service providers and plant maintenance departments use portable data recorders at power stations, desalination plants, refineries and workshops to commission and troubleshoot hydraulic power packs, valve actuator systems, presses, test benches and lubrication systems. Typical jobs include logging pressure and temperature on a hydraulic unit over a shift, capturing the pressure peak of a valve closing, measuring pump performance with flow and pressure, and documenting before-and-after results for a repair.

Information to send with an HMG 2500 RFQ

• Language of the documentation and number of units.
• Sensors needed, with ranges and thread connections.
• Cables, adapters and case.
• Delivery location and any calibration requirement.

Documents and quotation

The Hydac HMG 2500 data sheet is attached on this page with the functions, technical data and ordering details.

Send the sensor list and language choice and Seven Star LLC will confirm the HMG 2500 package and quote supply to Oman and the GCC.