Devices for control, monitoring dimension
and diagnostics of machinery


ELECTRONIC TACHOMETERS -04, S-4


-04

Version 1


-04

Version 2


-04

Back view

ELECTRONIC TACHOMETER -04

Purpose:

Electronic digital tachometers -04 (hereinafter referred to as tachometers) are intended for non-contact remote measurement and control of angular velocity of rotor-type machinery.

Description:

Its principle of operation is based on measurement of the pulse-repetition interval from the sensing device and conversion from measured value to rounds per minute.

Tachometer is composed of a sensing device with transducer-integrated and indicating gage unit.

A sensing device with transducer-integrated, the input value of which will be angular velocity, provides the pulse shaping with the pulse-repetition interval proportional to angular velocity of the rotating object.

Two versions of tachometer are produced - one with a four-digit display (version 1) and the other with a five-digit display (version 2).






Technical data
Rotation frequency measurement (version 1), rpm 10 to 9990
Rotation frequency measurement (version 1) , rpm 10 to 50000
Limits in permissible relative error of rotation frequency measurement, % (0.1% Nm + 1),
Nm - current value of the rotation frequency measured
Range of analog uniform output signal, m* 4 - 20
Limits of reduced error of analog output signal, % 1
Electric insulation strength of the feed circuit ,V, no less than 1500
Electric insulation resistance of the feed circuit, megaohm:
    - under standard conditions, no less than 20
    - under working conditions, no less than 2
Supply:
    - alternating voltage,V 22022
    - frequency, Hz 501
Consumed power, VA, no less than 12
Weight, kg no less than:
    - sensing device ready-mounted with preamplifier 0.3
    - gage unit 0.9
Dimensions of gage unit, mm
    - width 145 2
    - length 190 2
    - height 72 2
Dimensions of sensing device, mm
    - length 75 2
    - diameter 101
Dimensions of driver amplifier for optical and eddy-current sensing device, mm
    - width 35 2
    - length 90 2
    - height 35 2
Length of connecting cable, m up to 200

Application conditions
Ambient temperature, ° -10 to +60
Maximum permissible relative air humidity at 35 °, % 95
Maximum permissible sinusoidal vibrations in the frequency range 10 - 100 Hz, amplitude,
    mm 0.15
    m/sec 19.2
Atmospheric pressure, kPa 84 to 106.7 (630 - 800)
Mean-time-between-failures, h, no less than 20000
Average life, year, no less than 8

* Tachometer is completed with a defined type of transducer and current terminal on the customer's request


 COT-4

ELECTRONIC TACHOMETER SOT-4

Purpose:

An industry-oriented electronic tachometer SOT-4 is used to measure and display the rotation frequency of rotor-type machinery. It transfers the measured values of rotation frequency to the recording systems.

Extra capabilities:

  • Operation in the pulse counter conditions
  • Frequency measurement
  • Remembering of peak values
  • Application of safety setting limits with the under-over-speed peak values

Technical data
Measurement range of rotating speed, rpm 5...60000
Measurement error, % ±0.1 +1 units of low order
Supply voltage, V 220±22
Input signal TTL-compatible
Power consumption, W 3
Overall dimension (block design) WDH, mm 14317272
Tachosensor sensitive region, mm:
    - eddy current up to 2
    - magnetic up to 20
    - optical up to 40
Mass , kg:
    - gage unit 0.6
    - tachosenser with an extender 0.3
Interface RS232, RS485, 4...20 m

Operating conditions
Ambient temperature, °C
    - gage unit from +5 to +55
    - tachosensor from -10 to +120
Relative humidity at 25 °, % to 98
Atmospheric pressure, mm mercury column from 84 to 106.7 (630...800)
Value of external magnetic field 50 Hz frequency to 400 /m

On the customer's request the electronic tachometer SOT-4 is delivered with optical, eddy cur-rent or magnetic speed sensors, it may have different measurement ranges and interfaces. Tachometer passes test to approve the type of the gage.


Delivery conditions:
Delivery date - 3 - 4 weeks.
Guarantee period: 1 year.


Engineering information:

E-mail: market@niioep.ru
Pyotr N. Rudenko
Phone: +7(81369) 42914