magnetoelectric tachometer

SZM-4 magnetoelectric tachometer, made up of indicators and sensors, using the wide angle instrument as a journal-type indicator, shock and vibration resistant performance, instruction and stability reliability. Connected by transmission line without external power supply, can long-distance speed measurement of various power equipment.

Speed range: (0 ~ 1500) r / min (speed ratio of 1:1) 

(0 ~ 3000) r / min (speed ratio of 1:2) 

Accuracy class: 1.5 (20 ℃± 5 ℃) 

Working environment: temperature -25 ℃ ~ 55 ℃

5 ~ 100% relative humidity (including Cream) 

Additional temperature error: When the temperature is 10 ℃, showing every change in the value of additional measurement error is not greater than the upper limit of 1.2%. 

Tolerance to mechanical force: able to withstand 10g acceleration and impact frequency of 60 to 100 times per minute, continuous transport of Britain the impact of 1000 earthquake. 

Weight: 330g sensor indicator 590g

Dimensions: ø107 × 97 mm sensor indicator ø64 × 66.5 mm

Work 

Permanent magnet and the sensor mainly composed of induction coil, the permanent magnets connected by flexible shaft and power equipment. When the permanent magnet is driven in rotation after the induced current in the coil, by wire transfer to the indicator, after driving through the step-down rectifier measured direct current meter speed wide angle. 

Use 

  ● use of time could be used, use Needless to add oil. 

  ● supporting the use of sensors and indicators. 

  ● transmission line resistance is less than 1.2Ω, the equivalent of using RVV2 × 16 × 0.15 size of wire transmission distance of 10m. If not used to increase the size of the wires will increase accordingly 10m fundamental error of 0.2%. 

  ● In the following cases need to fine-tune the electrical adjustment of the negative indicators: 

  Transmission line resistance is too large can cause errors become larger. 

  Sensors and indicators need to swap one of them when re-matching. 

  Special needs, such as a sensor to drive two hours indicator. 

  ● in the regulation of micro-electrical lock nut should be loose, still speaking after adjustment locking nut.