Meter P-321M - a portable measuring device for measuring operational voice frequency channels, predgruppovyh paths and communication lines, as well as for measuring the signal levels and frequencies of control checks. The device can be installed in the hardware of mobile communications units and hardware maintenance, maintains operability when changing the ambient temperature of minus 30 to plus 50 ° C, relative humidity 98% at a temperature not higher than 35 ° C, as well as under the effect of frost and dew.
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& nbsp; Device P-321M provides:
& nbsp; - Measurement of the residual attenuation (gain).
& nbsp; - Measurement of the amplitude-frequency characteristics.
& nbsp; - Measurement of the working attenuation lines.
& nbsp; - Measurement of the signal levels in the frequency range from 0.2 to 150 kHz.
& nbsp; - Measurement of the integrated noise levels in the voice channel.
& nbsp; - performance testing group of primary paths at frequencies 62 and 101 kHz.
P-321M is mounted in a metal casing, equipped with a carrying handle on the upper surface of the device, the legs for mounting on a flat surface on the bottom surface and the lid front panel. On the back of the unit resealable screw cap connector and power switch toggle-type power supply.
& nbsp; you must carefully examine the specifications and instructions for use, location and purpose of controls for proper operation of the unit P-321M. The instrument should be operated under the conditions specified in the technical specification and in strict compliance with the instruction manual. The device contains hazardous to human life voltage of 220 V and 115 V AC. In this connection it is necessary to observe safety precautions, consisting of the mandatory connection of earth clamp device with a good grounding device and the power cord is connected to AC power only after connecting the cable connector to the device and grounding the enclosure. Touching the body included in the network and not grounded device life-threatening. Personnel involved in the measurements, should be trained in safe work practices and follow the regulations in force on electrical safety.
& nbsp; For the measurement instruments should be:
& nbsp; - to make the whole range of preparatory activities in relation to the object being measured, and the device;
& nbsp; - to carry out the measurement in accordance with the procedure and rules of work with the meter and the generator of the operating instructions;
& nbsp; - produce clotting after completion of the work according to the order of the instruction manual.
The operating principle of the measuring device U-321M based on the generation and measurement of the analog measurement signal. Functionally, the instrument consists of a flow generator (IG) and a level meter (DUT) analog measurement signal, typically arranged in one compact enclosure table execution. Measuring generator and level meter work together during calibration DUT and installation or control the output level of the analog measuring signal IG at the DUT, in other modes can operate independently of each other. Unveiling of the measured signal level is carried out by dial indicator gauge according to the level measurement limit set position.
& nbsp; Metrological and technical specifications
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Measuring generator provides a sinusoidal signal at the frequency range from 0.3 to 101.0 kHz fixed frequency setting in accordance with Table 1. Table 1 - Values of nominal frequency signal IG
Position switch kHz 0,3 < / td> 0,4 0,6 0,8 1,2 1,4 1,6 2,0 2,4 2,7 3,0 3,4 5,0 < / center> 8,0 Nominal frequency, Hz < td> 300 400 600 800 1200 1400 1600 2000 2400 2697 3000 3404 | < center> 5000 | 8000
& nbsp; Switch kHz 12,3 | < center> 14,0 | 16,0 18,0 20,0 22,0 23,4 32,0 62,0 101,0 < / tr> Nominal frequency, Hz 12306 14118 16000 18113 20000 < td> 22326 23400 32000 61930 101,050
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& nbsp; Note: If the frequency values of 62 and 101 IG kHz output parameters are normalized only with the output impedance of 150 ohms. Limits of main absolute error of the frequency setting signal IG output ± 0,001 f c d e / - nominal frequency in Hz, in accordance with Table 1.
& nbsp; Level Meter
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& nbsp; measured signal levels of the frequency range of 0.2 IU to 150.0 kHz.
& nbsp; Range of measured levels from plus 20 to minus 60 dB with the indicator scale.
& nbsp; Switching limits measurements at 5 dB.
& nbsp; dial gauge scale from minus 1 to plus 10 dB.
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& nbsp; powered devices:
& nbsp; from AC voltage of 187 to 242 V, frequency 48 to 52 Hz;
& nbsp; from the DC voltage source of 22 to 30 V.
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& nbsp; Current not exceed:
& nbsp; 0.15 A AC;
& nbsp; 1.4 A of constant current source.
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& nbsp; Operating conditions of devices:
& nbsp; ambient temperature in the range from minus 30 to plus 50 ° C;
& nbsp; upper value of relative humidity at 35 ° C not more than 98%;
& nbsp; atmospheric pressure in the range from 84 to 106.7 kPa.
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& nbsp; Apparatus for resistance to climatic and mechanical influences correspond to 5 group GOST 22261.
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& nbsp; Dimensions instrument with the lid closed (height x depth x width) less than : 205h255h320 mm.
& nbsp; devices Weight: no more than 13 kg.
& nbsp; Independent user MTBF: not less than 7500 hours
& nbsp; Average life: min. 15 years. Benefits E of this instrument are:
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& nbsp; - a dial gauge, which allows not only to read the measured value, but also to observe its establishment;
& nbsp; - appliance design for performance check and the calibration without additional instruments and accessories;
& nbsp; - a wide range of operating temperatures and humidity;
& nbsp; - powered by a variety of sources.
Terms and Conditions Shipping and payment Warranties & Returns Contacts
Documentation for download of the device not available
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