Permanent Dynamometer PDM

Permanent Dynamometer PDM

 

 

A Dynamometer measures the operation of a rod pumping system. A dynamometer card shows the position of the polished rod (x-axis) versus the load on the rod string (y-axis). Dynamometer cards are the main tool to determine the status of the rod pumping system.

The Leutert Permanent Dynamometer PDM records and displays these surface cards. The cards are redrawn with each complete stroke. The dynocards can be sent to the office via wired or wireless network. With the Leutert Dycomaster software installed on a laptop, on-site measuring of live data is also possible. The PDM also automatically switches off the pumping unit if preset limits are reached.

The Leutert PDM consists of four components: load sensor, stroke sensor, current sensor and the data acquisition unit. The data acquisition unit is installed near the pumping system and connected to the sensors installed on the pumping system.

Features

  • Improvement of pump efficiency and elimination of fluid pound
  • Analysis of the pumping unit and detection of malfunction to prevent damage
  • Alarms, when preset limits are reached
  • Cost reduction
  • Data storage via USB stick
  • Continuous recording and the possibility to compare dynamometer diagrams
  • Flash memory for quick updates without hardware changes
  • Explosion proof according to ATEX
  • Wireless / wired remote access (TCP/IP based)
  • 4 to 20 mA, unsusceptible to interference, allows very long connection cables
  • Real-time on-site measurements (dynocards, valve check, counterbalance)
  • Real stroke measurement, no value assumption

 

The Load Cell

Dimensions: (Ø 3.9 x H 6.5) in | (Ø 100 x H 165) mm
Temperature range: -4 to 140 °F | -20 to 60 °C
Measuring range: 0 to 14 t, 0 to 22 t
Signal: 4 to 20 mA
Transmitter: 2-wire transmitter with ATEX

The Stroke Sensor

Dimensions: (5.5 x 5.5 x 3.5) in | (140 x 140 x 90) mm
Temperature range: -4 to 140 °F | -20 to 60 °C
Measuring range: ± 45°
Signal: 4 to 20 mA
Transmitter: 3-wire transmitter

The Current Sensor

Dimensions: (3.5 x 2.2 x 2.8) in | (90 x 55 x 70) mm
Temperature range: -4 to 140 °F | -20 to 60 °C
Measuring range: 4 to 200 A
Signal: 4 to 20 mA
Transmitter: 2-wire transmitter with ATEX

The Data Acquisition Unit

Electronics: Embedded microcomputer
Power supply: 100 to 240 V with internal UPS
Temperature range: -4 to 140 °F | -20 to 60 °C
Total error: < 1.5%
Input signal: 4 to 20 mA, 2- and 3-wire system
Degree of protection: IP 67 / NEMA 6
Stroke range 0 to 250 in | 0 to 635 cm
Current range: 0 to 200 A
Dimensions: (19.7 x 15.8 x 15.8) in | (500 x 400 x 400) mm