VSWR SENSOR (MB1) AND DETECTOR HEAD (DH1) TO THE R2-102 MEASURING DEVICE 

We are offering the VSWR sensor (measuring bridge(MB1)) and detector head (DH1), which are used in a set with measuring units (sweep frequency generator (SFG) and indicator unit (Я2Р-70) of P2-102 device.

Designation  of P2-102 device are:  panoramic displaying on the indicator  and measurement of VSWR frequency characteristics and attenuation of elements of the coaxial tract. It is used in laboratory and enterprises bay at measurement and adjustment of VSWR parameters and attenuation of various microwave devices.

VSWR sensor is a measuring bridge (MB1),which forming signal  proportional to reflection coefficient of the measured device in cross-section of a measuring connector at the expense of comparison of a reflected signal from internal reference loading with a signal, reflected from the measured device. The formed signal of unbalance is detected on the built — in detector and transferred in the measuring block.
It is 6dB resistance divider formed by three resistors; resistance of each is equal to a wave impendence of a coaxial line (50 Ohm).

VSWR sensor (MB1) parameters

Operating frequency 0,01…2,14 GHz
VSWR measurement range 1,05 — 14,0
Tract’s size 7/3,04 mm
Dynamical range 40 dB

Detector head (DH1) it intended for formation of low-frequency signals proportional to the power level of the microwave signals.
It is used for measurement of the module of transmission coefficient , amplification, attenuation, and for power measurement. Due to using of special designs (with the built — in amplifier with frequency F0=100 kHz) and resent element base the detector head has a bandwidth of frequencies and measured powers, small irregularity amplitude-frequency characteristics, low value of VSWR input.

DH1 Parameters
Frequency range 0,01…4 GHz
Measurable power range minus 20…60 dBm
Limit of effective range of attenuation 0…40dB
Wave impendence 50 Ohm
Input VSWR, no more than 1,2
Tract’s size 7/3,04 mm

MULTICHANNEL DIGITAL ANALYZERS

Multichannel digital analyzers is a high-performance, fast(response) device with a standard PC, intended for checking and characterization of digital circuits. Carries out grouping of input channel in serial bus.

Analyzer’s  operates in two different modes:
  • internal synchronization mode(at recording of input data is used the internal clock frequency oscillator);
  • external synchronization mode (at recording of input data is used the external clock frequency oscillator)

Multichannel digital analyzer includes:

  • module of the logical analyzer;
  • personal computer (PC);
  • software.

 

Analyzer’s modifications Number of input channel Clock frequency Number of analog inputs
DA 16/20,40,80  16 20,40,80 ———
DA 32/20,40,80  32 20,40,80 ———
DA-À1 16/20,40,80  16 20,40,80 1
DA-À2 16/20,40,80  16 20,40,80 2
DA-À1 32/20,40,80  32 20,40,80 1
DA-À2 32/20,40,80  32 20,40,80 2
DA-À3 32/20,40,80  32 20,40,80 3
DA-À4 32/20,40,80  32 20,40,80 4

Modifications DA-A1…DA-A4 have the additional opportunity to measure the analog signal from 10 mV to 10 V.

SPECIFICATIONS

Memory capacity of data acquisition for one channel 128 Kb
Program decoding of serial bus RS 232, SPI. 12C
PC connection LPT
DC Supply voltage from external source 5V
Max. power consumption 5W
User interface WINDOWS 95/98/NT/XP

CONTROLLER BY TECHNOLOGICAL PROCESSES 

The controller by technological processes is indented for organization of remote switching ON/OFF,controlling and measuring up to 8 (with opportunity to increase up to 24), and regulation up to 8 (with opportunity to increase up to 16) parameters.

Provides the following types of adjustment:

  • manual (by inserted the necessary value);
  • automatic (the algorithm and value of limits of adjustable parameters are set ). The accuracy of adjustment depends on the given algorithm.

 

The main units of the controller are:
  • micro-controller (MC) with analog-digital converter based on pulse-duration modulation (ADC-PDM);
  • analog-digital converter based on pulse-code modulation (ADC);
  • nonvolatile RM;
  • interface of sequential standard ports RS-232 and RS-485;
  • interface of control and indication (ICI). Consists of the keyboard (16 keys) and liquid-crystal detector (LCD) with lighting control;
  • analog commutator (AC);
  • clock with RAM;
  • attenuator (Att);
  • analog filter and level converter (AFLC);
  • keys (photon-coupled and transistor).

SPECIFICATIONS

Interface with central computer RS 232C or RS 485
Voltage: 
— input control signals 0…5 V
— output  control signals (six digit ADC has 64 discrete values of voltage) 0…12 V
Power consumption:
 — in operation mode, no more than 1 W
 — in STAD BY mode 0,001 W
Measurement accuracy of input signals 0,02 V
Storage time of values of the adjustable parameters
-independently of power supply, not less than 10 years

THIN-FILM TEMPERATURE SENSORS

We propose the thin film temperature sensors made ​​on the basis of the platinum resistor and having long term stability, durability and reproducible of performance. It is used for precise temperature control of processes.

SPECIFICATIONS

Temperature range of  measurements minus 200…+1000 0С
Sensor’s resistance at ТENV = 00С (R0) 100,  200, 500, 1000 Ohm
Temperature coefficient of sensor (αT) 0,00385 ± 0,63 x 10-4
Spread at R0 minus 0,6 …+ 0,2 %
Response time 0,15 …05 s
Overall dimensions without leads 3,1×1,3 x1,2 mm
Leads length 10…15 mm

Sensitive Hydrogen Sensor 

 We are offering the thin-film high-speed hydrogen sensors, operated at low operating temperature

Provides:

  • high sensitivity and selectivity to hydrogen gas;
  • low operating temperature;
  • low power consumption;
  • fast response and recovery times;
  • continuous time of stabile operation at  up 0 to 98% humidity.

 Fields of application 

Automated systems for explosion prevention.

Control of space power generating system.

Safety systems for automobiles working by hydrogen fuels.

Fuel cells.

Explosibility monitoring of powerful electric accumulators and oscillators for leak coolant detection.

Monitoring systems of  flow processes and detectors of hydrogen leak.

Smoke’s multisensory detector.

Electron pumps.

SPECIFICATION

Hydrogen definition range 50…40000ppm
Sensitivity at 1000ppm H2 103
Power consumption of heater 120mW
Heater voltage 3,5V
Supply voltage of sensor 1…5V
Resistance of the heater at 20оС  temperature 75Ohm
Response time at 100ppm H 1…2 s
Operating temperature 130оС

 

The given product is developed together with the Center of semiconductor devices and nanotechnologies of the Yerevan State University