SZMJ-302轉速記錄儀SZMJ302轉速表

本儀表用于遠距離測量轉速，記錄轉速，并達到二點轉速報警目的，其作用類似于SZMJ－102。儀表配用SZMB－3型傳感器時，能測量低轉速。

SZMJ302 SZMJ-302 tachograph tachometer

This instrument is used for remote measuring recordingspeed, speed, speed alarm and reached two points, its function is similar to the SZMJ102. The instrument withSZMB3 type sensor, capable of measuring low speed.

The main technical index

Conditions of use: the instrument in the environment temperature is 5 ~ 40 ℃, normal relative humidity > 85%range.

The basic error: instrument at an ambient temperature of 20 ± 2 ℃, the basic value shall not exceed the upper limitof the measuring error of ± 1% relative humidity > 85% range.

The influence of temperature: when the temperature from 20 ± 2 ℃ to 5 ~ 40 ℃, instrument variation of the indicating value conversion for the temperature 10 ℃every change should not exceed the absolute value of the basic error limit.

Recording error: instrument recording error of indication error of ± 0.5%.

Additional electric contact capacity: 220 volts, AC 1A, orDC 30 V, 0.5A, setting range for the full scale of 10% ~90%.

Instrument power supply: 220 V AC 50 Hz voltage changes, when the rated value 10/15%, frequency change is rated the range of ± 5%, normal work.

Power consumption: ≤ 12VA

Weight: 3.7 kg

□ principle

Adjusting apparatus consists of SZMB 0 (or SZMB 1)magnetoelectric speed sensor, f/l converter and EL936 01 automatic balance record of three parts.

The measured speed through the magnetic sensor tofrequency f, shaping frequency f after amplification,integration, 4 ~ 20 mA constant current, lost to the EL936 - 01 type recording instrument, indicating, recording,alarm and can output two adjustable signal.