Hand-Held Readout and Datalogger – Service Master Easy, 4 Inputs


The HPM540 (Service Master Easy) is ideal for use as a portable hydraulic display and data logger as well as for permanent installation on small hydraulic test benches.

Powered by a rechargeable NiMH battery, this easy-to-use diagnostic test system is a invaluable tool for comparative testing as well as preventive maintenance, verifying component settings, pinpointing poor system performance, and measuring differential pressure and capturing harmful pressure spikes. Accessories include a wide range of pressure transducers and flow meters as well as temperature and speed sensors.


  • Measure and record flow, pressure, temperature, speed plus peak and differential pressure
  • “Plug and play” automatic sensor recognition
  • Four multi-purpose inputs (8 channels if you measure temperature using PTT pressure transducer)
  • Large back-lit display MIN/MAX memory and differential measurements
  • Data log continuously, auto trigger or log by point
  • Connect to a PC quickly and easily via USB
  • Analyse data quickly and easily using free Windows© compatible HPMcomm software
  • Via PC HPMcomm software define ‘projects’ to simplify repeat tests
  • Directly control continuous logging from your PC and graph data in real time
  • Robust design
  • Easy operation with menu driven functions
  • Store up to 1 million values
  • Sample Rate 0.25 ms (Input 1) 1 ms (Inputs 2-4)


Technical Data:

  • Display: Digital LCD text display; Type:128 x 64 pixels; Visible area: 72 mm x 40 mm; Resolution: 128 x 64 pixels; Character height: 6mm
  • Memory: Measured value memory: 1,000,000 points; Curve memory: 250,000 points; Variable measuring period up to 100 hours; Manual and automatic triggering
  • Functions: Differential Value Measurement; MIN/MAX Memory; Online data transfer; Battery level indicator; Power calculation (display only); Flow run-out (display only); Auto power off
  • Interfaces: USB 2.0 online speed ; Four 5-pin push-pull style connectors; Automatic Sensor Recognition for pressure, temperature or rotational speed sensors; 12 Bit A/D Converter (4096 steps); Selectable scanning rate in 1 ms intervals
  • Battery: Internal rechargeable Ni-MH battery; Recharge circuit for use with external power supply; Operating time – 8 hours; Charge time – 3 hours; Excitation voltage (12-30 VDC)
  • Weight: 540 grams (1.19 lbs)
  • Dimensions: 9.25″ x 4.19″ x 2.09″ (235 x 106 x 52mm)
  • Operating Temperature: 32°F to 122°F (0°C to 50°C)
  • Storage Temperature: -4°F to 140°F (-20°C to 60°C)
  • Housing: Glass reinforced polyamide ; 12-Key tactile touch membrane
  • EMC Protection: Electromagnetic interference (DIN/EN 50081, Part 1); Immunity to emitted interference (DIN/EN 50082, Part 2)
  • Protection Category: IP54 (EN60529)

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Additional information

Weight 1.9 lbs
Dimensions 9.25 × 4.19 × 2.09 in