FAQ

Frequently asked questions and answers – Drive technology & measurement technology

Here you will find helpful tips and FAQ’s in the field of measurement and drive technology. For example, you will learn the difference between calibration and adjustment of a measuring device, how a high-voltage test station is protected in accordance with standards, as well as setting and parameterization aids for the ST500, ST9000, ST8100 and ST7800 frequency inverters.

This FAQ does not only provide answers to all questions regarding parameterization, but also answers to questions about the correct dimensioning of the frequency inverter in relation to your motor.

  1. ST500 | How do I commission the ST500 frequency inverter?

    To parameterize the frequency inverter ST500, you can follow the following flow chart (click on the picture for a higher resolution):   […]

  2. How can I switch the benchtop multimeter to current measurement?

    The explanation can be easily explained using the ST1941 benchtop multimeter.     The functions of the measuring instrument are located to […]

  3. What is the difference between a 4 and 4½ digit multimeter?

    A whole digit can represent digits from 0-9. A half digit can only represent a “1”, but a 2 can no longer […]

  4. For which tasks is a digital multimeter best suited?

    As the name suggests, multimeters can be used as all-rounders in various application areas.  Whether in the laboratory, in production or in […]

  5. What do I have to consider when using an LCR meter?

    When using an LCR meter, a zero calibration should be performed before each measurement with a new setup or the use of […]

  6. Firmware upgrade for milliohmmeter ST2515

    Download firmware here:  download.sourcetronic.com/2515_001.sec Copy the attached file to a small USB stitch (1 to 4 GB, formatted with FAT or FAT32) […]

  7. ST500 | Analog output signals – for example, for motor voltage, motor current, motor power

    With the inverter ST500, it is possible to display 15 different measured variables via the terminals DA1 and DA2, one for each […]

  8. ST500 | Braking and acceleration times

    With ST500 frequency inverter it is possible to retrieve various functions via the terminals DI1 to DI8. One of them is to […]

  9. ST500 | Limit starting current e.g. for fan motors

    To keep the starting current low, there are various F / V characteristics. The different characteristics must be chosen using F4.00. For […]

  10. ST500 | Introduction to Operating: By Changing the Target Frequency

    To change the target frequency of F0.19 = 50.00Hz (the default factory setting) to e.g. F0.19 = 250.00Hz, proceed as follows: In […]

  11. ST500 | DC braking to hold engine into position

    With the ST500 frequency inverter, it is possible to vary the braking behaviour with a superimposed DC braking voltage, so as to […]

  12. ST500 | External Potentiometer – How to connect it and which one is compatible?

    An external potentiometer, which is connected to AI1, +10V and GND will have a resistance of 1kΩ and a power of 2W. For […]

  13. ST500 | Initial operation – What should I watch for (motor data)?

    Before a initial operation of a frequency inverter you should absolutely check that the factory settings are loaded y0.00 = 3. Then the […]

  14. ST500 | Power Class – Which Model Do I Need?

    Normally, the power class of the inverter should be the same as the motor’s. With heavy-duty starting motors however, it may be […]

  15. ST500 | Minimum Frequency for External Potentiometer

    To have the external potentiometer during operation with minimun frequency in the left hand position, the parameters have to be adjusted. On […]

  16. ST500 | Activate Panel Potentiometer – Control Motor Frequency via Dial

    The frequency inverter ST500 has a potentiometer on the panel, which can be used to adjust the motor frequency. For this purpose […]

  17. ST500 | Pump Control

    To use the frequency inverter as a pump control, for example at a pressure sensor for the “actual pressure”, these parameters are […]

  18. ST500 | Program Sequences – PLC Programming

    With the frequency inverter ST500 it is possible to let run program sequences timed. A site of operation would be a grinding […]

  19. ST500 | Multi-speed function – Simple frequency or change of rotating direction

    Multi-speed Function: Speed1=50Hz, Speed2=40Hz and Speed3=30Hz   F0.03 = 6 frequency control on multi-speed F0.11 = 1 regulator release on terminal clamps […]

  20. ST500 | Keep last frequency after resetting

    To get back the frequency, which has been adjusted by buttons, even after a power loss, you only need to change one […]

  21. ST500 | Forward, reverse, stop – Which parameter and terminal assignment?

    The frequency inverters ST500 have the clamps DI1, DI2 and DI3 with which the inverter can be switched via control signals or simple […]

  22. ST500 | Target frequency over 320Hz

    To set a target frequency greater than 320Hz, it is necessary to make an resolution adjustment of the target frequency F0.02 = […]

  23. ST500 | Forward, reverse, stop with buttons

    The frequency inverter ST500 uses the terminals DI1, DI2 and DI3 which with the inverter can be switched via control pulses or […]

  24. ST500 | Forward and reverse with panel potentiometer

    To control the inverter with the panel potentiometer in both directions the following parameters have to be changed. F0.03 4 frequency control […]

  25. ST500 | Factory Settings – How do I reset the inverter?

    To reset the frequency inverter ST500 to factory settings, the parameter must be y0.00 = 1 or y0.00 =3 . In y0.00 =1 […]

  26. ST500 | Wiring diagram

    In order to always wire the frequency inverter correctly, you will find the connection diagrams of inverters of all power classes here. […]

  27. ST500 | Change display (rpm)

    In order to have another value displayed by the frequency inverter during the process, e.g. the output voltage or the current, parameter […]

  28. ST9000 | Braking and acceleration times

    With ST9000 frequency inverter it is possible to retrieve various functions via the terminals DI1 to DI8. One of them is to […]

  29. ST9000 | Factory Settings – How do I reset the inverter?

    To reset the frequency inverter ST9000 to factory settings, the parameter must be y0.00 = 1 or y0.00 =3 . In y0.00 =1 […]

  30. ST9000 | Wiring diagram

    In order to always wire the frequency inverter correctly, you will find the connection diagrams of inverters of all power classes here. […]

  31. ST9000 | Initial operation – What should I watch for (motor data)?

    Before a initial operation of a frequency inverter you should absolutely check that the factory settings are loaded y0.00 = 3. Then the […]

  32. ST9000 | Forward, reverse, stop with buttons

    The frequency inverter ST9000 uses the terminals DI1, DI2 and DI3 which with the inverter can be switched via control pulses or […]

  33. ST9000 | Limit starting current e.g. for fan motors

    To keep the starting current low, there are various F / V characteristics. The different characteristics must be chosen using F4.00. For […]

  34. ST9000 | Keep last frequency after resetting

    To get back the frequency, which has been adjusted by buttons, even after a power loss, you only need to change one […]

  35. ST9000 | Forward and reverse with panel potentiometer

    To control the inverter with the panel potentiometer in both directions the following parameters have to be changed. F0.03 = 4 F1.44 […]

  36. ST9000 | Power Class – Which Model Do I Need?

    Normally, the power class of the inverter should be the same as the motor’s. With heavy-duty starting motors however, it may be […]

  37. ST9000 | Minimum Frequency for External Potentiometer

    To have the external potentiometer during operation with minimun frequency in the left hand position, the parameters have to be adjusted. On […]

  38. ST9000 | Introduction to Operating: By Changing the Target Frequency

    To change the target frequency of F0.19 = 50.00Hz (the default factory setting) to e.g. F0.19 = 250.00Hz, proceed as follows: In […]

  39. ST9000 | Activate Panel Potentiometer – Control Motor Frequency via Dial

    The frequency inverter ST9000 has a potentiometer on the panel, which can be used to adjust the motor frequency. For this purpose […]

  40. ST9000 | Target frequency over 320Hz

    To set a target frequency greater than 320Hz, it is necessary to make an resolution adjustment of the target frequency F0.02 = […]

  41. ST9000 | Program Sequences – PLC Programming

    With the frequency inverter ST9000 it is possible to let run program sequences timed. A site of operation would be a grinding […]

  42. ST9000 | Multi-speed function – Simple frequency or change of rotating direction

    Multi-speed Function: Speed1=50Hz, Speed2=40Hz and Speed3=30Hz   F0.03 = 6 frequency control on multi-speed F0.11 = 1 regulator release on terminal clamps […]

  43. ST9000 | Analog output signals – for example, for motor voltage, motor current, motor power

    With the inverter ST9000, it is possible to display 15 different measured variables via the terminals DA1 and DA2, one for each […]

  44. ST9000 | DC braking to hold engine into position

    With the ST9000 frequency inverter, it is possible to vary the braking behaviour with a superimposed DC braking voltage, so as to […]

  45. ST9000 | Change display settings (r/min)

    To display a different value during the process on the display, the value of F6.01 must be changed. This parameter is specified […]

  46. ST9000 | Forward, reverse, stop – Which parameter and terminal assignment?

    The frequency inverters ST9000 have the clamps DI1, DI2 and DI3 with which the inverter can be switched via control signals or simple […]

  47. ST9000 | External Potentiometer – How to connect it and which one is compatible?

    An external potentiometer, which is connected to AI1, +10V and GND will have a resistance of 1kΩ and a power of 2W. For […]

  48. ST9000 | Pump Control

    To use the frequency inverter as a pump control, for example at a pressure sensor for the “actual pressure”, these parameters are […]

  49. First use – To what I have to pay attention?

    After powering up the inverter for the first time, it is very important to program the motor paramters which can be found […]