Customer-specific measurement technology, including individual and series production

The electronics development from ATESTEO, which is integrated into the field of customer-specific measurement technology, has extensive competence in further developing and newly developing electronic measurement systems.

Measuring amplifier for strain gauges

The ATESTEO strain gauge measuring amplifier processes the signals of sensors that are delivered on the basis of strain gauges in a Wheatstone bridge circuit. The SAFO makes available a reference voltage for supplying the bridge and converts the arriving differential voltage into a frequency in the range of 60 kHz + 20 kHz. In SAFO 1.3, ex works, a temperature compensation curve for the internal electronics is captured and deposited in an EEPROM. The user can switch the temperature compensation on or off at will.

SAFO 1.3 — Features

  • Torque-proportional frequency output [Hz] of 60 kHz + 20 kHz
  • Amplifier adjustable with a DIL (dual in line) switch in the range 1-10000
  • Automatic zero-point adjustment (16-bit resolution) at the touch of a button or serial interface
  • Serial interface with terminal function
  • Calibration jump (shunt calibration)
  • Measurement and display of the electronics temperature in the range of 0°C-125°C (0.5°C resolution) with measuring site compensation feature
  • Resettable operating hour counter
  • Optional external temperature measurement using a thermoelement with a measuring point compensation possibility
  • Optional switchable input of voltage +10 V/+5 V on the strain gauge amplifier
  • Optional one-line seven-digit display

SAFO 2.3 — Features

  • Strain gauge amplifier with frequency output [Hz] in the range of 60 kHz + 20 kHz
  • Galvanically separated analogue output +10V and +20 mA and 4-20 mA
  • Amplifier adjustable by a serial interface in the range 0.3077mV/V and 14.2857mV/V
  • Automatic zero-point adjustment at the touch of a button or serial interface
  • Serial interface with terminal function
  • Measurement and display of the electronics temperature in the range of 0°C-125°C (0.5°C resolution) with measuring site compensation feature (maximum operating temperature of the electronics: 70°C)
  • Resettable operating hour counter
  • Optional CAN bus interface

Vibration monitoring systems

To monitor sensitive drive components, structure-borne sound monitoring systems are employed. These systems are equipped with a robust piezoelectric sensor as a vibration sensor. The sensor is mounted directly on critical bearing positions of fans, pumps, and other drive components. Damage to bearings is signalised by increased noise emissions. With the help of the internally or externally arranged sensor, the structure-borne sound monitoring system measures the structure-borne sound emissions that occur during operation, which enables changes to be determined. By exceeding a freely adjustable threshold, a switch output is set which is again cancelled after the threshold is fallen below. Usually, this output to the output serves as a warning. Further outputs can be used for switching off and locking the monitored machine.

Additional product developments

  • Break-out boxes
  • Gear/transmission activators (drivers for solenoid-controlled valves and sensors)
  • Strain gauge application service
  • Calibration of torque sensors and torque transducers
  • Development of special measurement equipment