Radiometric devices >> frequency counters, synthesizers, frequency standards >> frequency counters Ch3

CH3-49

69 999 RUB
28 000 UAH
available:
3 pieces

Online prices include VAT.

For order is possible effectively delivery of any quantity.
Frequency CH3-49 electron-counting with a choice of limits (CH349, CH3 49, CH-349, CH 349)
 
Frequency of electron-counting with the choice of the limits of CH3-49 is designed for:
- Measurement of frequency, period and frequency ratio of electric sinusoidal and pulse signals;
- Counting the number of pulses with the ability to count from any number up to the limit;
- Processing of the measurement result with respect to the prescribed limits;
- Issuing reams of pulses or reference the measured frequency;
- Release of information about the results of measurements on the recorder.
 
Technical characteristics of the devices CH3-49 frequency meters electron-counting with a choice of limits:
 
Working conditions of use (operation):
The ambient air temperature - from +5 º C to +40 ° C;
Relative humidity - up to 95% at +30 ° C;
Atmospheric pressure - from 60kPa to 106kPa (from 460mm.rt.st. Up to 800mm. MmHg);
The fixture frequency CH3-49 electron-counting with a choice of limits - AC, 50 Hz ± 0,5 Hz and 220V ± 22V with harmonic content up to 5% or 400 Hz frequency and voltage of 28 Gts/-12Gts 115 ± 5,75 V or 220V ± 11V;
It can be used for:
- Setup and calibration generators of sinusoidal and pulse signals, the reference generator, frequency divider, receiving and transmitting circuits and other devices;
- Tolerance control the output frequency generators;
- Measurement of mechanical and electrical quantities (assuming conversion of a frequency or time) and maintain them within the specified limits with a high degree of accuracy;
- As a generator with adjustable pulse packets number of pulses in a packet, in automatic control, etc.
Frequency device CH3-49 electron-counting with a choice of limits and measures the frequency of sine wave signal range:
- From 0.01 Hz to 12MHz - DC coupled;
- 10Hz to 12MHz - AC coupled with a voltage input signal;
- 0.1 V to 100 V for sinusoidal signals;
- 0.5V to 100V for pulsed signals of either polarity rectangular pulses and the duration of not less than 0.1 ms at 0.5;
Result of the measurement instrument frequency electron-counting CH3-49 with the choice of the limits defined by the formula:
 
D = ∙ ƒizm tsch (1)
 
where D - the measurement result obtained on a digital display; ƒizm - measured frequency, MHz tsch - time accounts, us, from 1mks to 99,999 s, defined by the formula:
 
tsch = M ∙ N (2)
 
where M - the time stamp equal to 0.1 ms; 1mks; 10mks, 10, 2 ms, and 10 3 ms; N - averaging factor (multiplier) is equal to 1,2,3 ... 99 999;
Allowable voltage high-frequency noise on the most sensitive limit input attenuator must be no more than 10kV;
The input resistance and input capacitance of the device frequency CH3-49 electron-counting with a choice of limits - at least 100 ohms and not more than 200 pF, respectively;
The relative error in measuring the frequency of sinusoidal signals and pulse signals δ ƒ - within the limits of the values ​​calculated by the formula:
 
δ ƒ = ± (δ a +1 / (ƒizm ∙ tsch)) (3)
 
where ƒizm ∙ - relative error in frequency internal reference oscillator or external reference frequency is used instead of the internal reference generator; ƒizm - measured frequency, MHz tsch - time accounts, us, from 1mks to 99,999 seconds;
Rated frequency 5 MHz reference oscillator. The limits of adjustment of the reference oscillator frequency with the release of the device frequency of electron-counting with a choice of limits H3-49 - not less than 5 ∙ 10 -7 to dinner parties of the nominal value;
The actual value of the reference oscillator frequency with the release of the device after samoprogreva for at least 1 hour sets with a relative error of ± 1 ∙ 10 -8;
Root-mean random variation of the relative frequency of the reference oscillator frequency counters devices CH3-49 electron-counting with a choice of limits for 10 minutes after 1:00 samoprogreva - less than 1 ∙ 10 -8;
The relative error of the reference oscillator frequency after 1:00 samoprogreva - in the range:
- ± 2,5 ∙ 10 -7 to 30 days;
- ± 5 ∙ 10 -7 for 12 months;
Time of 30 days. and 12 months, counted from the date of installation of a real frequency values ​​with a relative error of ± 1 ∙ 10 -8 (mode of operation with no shutdown and shutdown);
Temperature coefficient of frequency of the reference oscillator frequency device CH3-49 electron-counting with a choice of limits - within ± 5 ∙ 10 -9;
The instrument measures the unit and the average period of sinusoidal oscillations and pulse shapes in a range of up to 10 1mks 2 (from 1 MHz to 10 -2 Hz);
The measurement result is given by:
 
D = (N / M) Tizm (4)
 
where N - the averaging factor (factor time), equal to 1,2,3 ... 99 999, M - time stamp (time frequency fields), equal to 0.1 ms, 1mks, 10mks, 10, 2 ms, 10 3 ms; Semitism - measured period, mcs;
The relative error in the measurement instrument Frequency CH3-49 electron-counting with a choice within a period of sinusoidal signals and pulse signals with pulse rise more than half of the signal frequency of the δ mc - within the limits of the values ​​calculated by the formula:
 
δ n = ± (δ a + δ s / N + M / N ∙ Tizm) (5)
 
where δ o - watch the formula (3); δ s - relative error in the trigger level, M, N, magnetism - see formula (4);
The relative error in the trigger level δ r is given by:
 
δ s = Ush / 3 ∙ Uc (6)
 
where Ush - the amplitude of the noise signal, B; U with - the minimum amplitude of the input signal.In. The value of the relative error δ h depending on the ratio Uc / Ush are shown in Table 1;
 
Table 1
Uc / Ush
20dB
40dB
60dB
δ s
3 ∙ 10 -2
3 ∙ 10 -3
3 ∙ 10 -4
 
When the pulse shape with the input pulse rise time not more than half of the signal frequency of the relative error δ TI - Within the value calculated by the formula:
 
TI δ = ± (δ a + M / N ∙ Tizm) (7)
 
where δ o - watch the formula (3); M, N, Tizm - see formula (4);
Frequency device CH3-49 electron-counting with a choice of frequency ratio measures the extent of electrical oscillations.The signal range of high-frequency sinusoidal waveform compared ƒv (mate "10 -4 MHz-10 MHz") - from 100Hz to 10MHz, the input voltage - 0.5V to 10V;
Outcome measure D is defined as:
- Operation mode switch to the provisions of Part:
 
D = 10 ∙ M ∙ N ∙ ƒn / ƒv (8)
 
- Mode selector switch in position PERIOD:
 
D = N/10 ∙ ∙ ƒv M / ƒn (9)
 
where M - factor depending on the position of the switch and M is equal to 0.1; I; 10, February 10, March 10; N - the number assigned by the switch Multiplier N, equal to 1,2,3 ... 99 999;
The relative error in the measurement instrument Frequency CH3-49 electron-counting frequency limits the choice ofδ relative - in the range of values ​​calculated by the formula:
- Switch ROD WORKS in terms of Part:
 
δ rel = ± (δ h / 10 ∙ M ∙ N + ƒv/10 ∙ M ∙ N ∙ ƒn) (10)
 
where δ s - relative error in the trigger level, due to noise in the signal from the highest compared one hour - see formula (6);
M, N - see formula (9);
- Switch in position ROD WORK PERIOD:
When a sinusoidal waveform of lower frequency compared with the shape and pulse rise time pulses more than half of the signal from the higher frequencies being compared:
 
δ rel = ± (δ r / N +10 ∙ M ∙ ƒn / N ∙ ƒv) (11)
 
where δ s - relative error in the trigger level, due to noise in the signal from the highest compared one hour - see formula (6);
When the pulse waveform of lower frequency compared with a rise time pulses less than half of the signal of higher frequency compared:
 
δ = ± 10 rel ∙ M / N ∙ ƒn / ƒv) (12)
 
where δ s - relative error in the trigger level, due to noise in the signal from the highest compared one hour - see formula (6);
The instrument measures the frequency of the mode of self-control of its own reference signal of 10 MHz in order to verify that the instrument;
Frequency device CH3-49 electron-counting with a choice of limits is automatic, and manual external reset, manual or external start and stop;
External reset, start, stop, made a negative polarity pulse amplitude from 2.4 V to 4.5 V during no less 1mks at 0.5;
Frequency device CH3-49 electron-counting with a choice of limits the number of pulses produced by (summation) in the frequency range 0.01 Hz to 12MHz with a preliminary division of the input signal frequency of 10 ∙ M ∙ N (regime are summarized.);
Outcome measure D is defined as:
 
D = (1 / 10 M ∙ ∙ N) ∙ ∙ ƒsum tsch (13)
 
where ƒsum - average frequency of summed signals, Hz; tsch - time accounts, defined manually (Start and Stop), c;
Frequency device CH3-49 electron-counting with a choice of limits the number of pulses produced by a range of frequencies from 0.01 Hz to 1 MHz with a preliminary division of the input signal frequency of 10 ∙ M ∙ N and automatic stop counting when reaching the specified upper limit L2, equal to 1, 2,3 ... 99 999 (counting mode L2);
The unit is counting the number of pulses in the range from 0.01 Hz to 1 MHz in the preliminary division of the input signal frequency of 10 ∙ M ∙ N and automatic repetition of the cycle when the specified upper limit L2, equal to 1,2,3 ... 99999 casings time interval equal to the time display N (cycle mode);
Frequency device CH3-49 electron-counting with a choice of limits issue in all modes coded signal for comparison with the results of measurements of D with the established limits of L1 (lower limit) and L2 (upper limit), which can take values ​​1,2,3 .. .99999;
The signals correspond to the comparison table 2;
 
Table 2
Comparison conditions
The code for Connectors
down
normal
above
D ≤ L1
0
A
A
L1 <D ≤ L2
A
0
A
D> L2
A
A
0
 
0 - a logical "0" (voltage less than 0.4 V);
1 - a logical "1" (voltage less than 2.4 V);
Frequency device CH3-49 electron-counting with a choice of limits gives pulse packet after a time interval equal to the time display;
Pulse parameters:
- Number of pulses in a packet corresponds to the number on the display unit scale length;
- Polarity - positive;
- Amplitude - not less than 2V at a load of 10 ohms;
- Duration - not less than 60ns at 0.5;
Frequency device CH3-49 electron-counting with a choice of limits provides an indication of the measurement result in digital form with leading zeros quenching, the inclusion of memory (storing the measurement result on a subsequent measurement cycle), an indication of overflow (P) and the result of comparison (below - "< , "" Norma, "above - «>»);
The device provides all modes of reading the measurement result of the established values ​​of R, equal to 0, 1,2,3, 99999;
With automatic starting device frequency CH3-49 electron-counting with a choice of limits provides fine time setting display the measurement result and the time indicate:
- In the position of the switch rapidly from 0.1 ms to 10 ms;
- In the position of the switch from NORM 0.05 to 4c;
The allowable tolerance of ± 50% of these values;
In switch mode EXT indication saved until you press the RESET;
The device is an electron-counting frequency meter with a choice of limits CH3-49 provides the ability to work from an external reference frequency (instead of the internal reference generator) 1 MHz ± 10Hz, 10Hz ± 6MHz and 10MHz ± 10Hz voltage from 0.6V to 3V;
The device provides output signals of the reference frequency in the form of pulses of positive polarity amplitude of at least 2.4 V at a load of 10 ohms.Pulse repetition frequency coincides ƒ, MHz, is given by:
 
ƒ = 1 / M ∙ N (14)
 
where M and N - see formula (2);
Frequency device CH3-49 electron-counting with a choice of limits gives automatic control system constant voltage power supply of +5 V, 12.6 V, 180 V and-5V and the internal signal generator of opera in the form of positive pulses of 5 MHz amplitude at least 2.4 V into 10 ohms;
The device has the ability to remotely control an operating mode switch, the timestamp, the factor N, PRE-R, Lower..PR Yedelev 1 .1, Superior..LIMIT L2 in parallel BCD 8-4-2-1;
Frequency device CH3-49 electron-counting with a choice of limits on the recording device gives information about the mantissa of the measured value, overflow, and by comparing the parallel binary-decimal code 6-4-2-1;
The device generates a signal to start the recording device in the form of a pulse of positive polarity lasting at least 10mks at 0.5 amplitude of at least 2.4 V at a load of 10 ohms;
Frequency device CH3-49 electron-counting with a choice of limits takes the external potential signal "Prohibition-resolution."In the presence of a signal 'ban' (logic 0) the device switches to a standby mode when no signal "ban" - you performs its functions;
The device provides its specifications at the end of time required to establish the mode of 1 hour;
Time ready device without guaranteed accuracy of the internal reference oscillator frequency, or when working from an external reference frequency - less than 5 minutes;
The device is power from the AC, 50 Hz ± 0,5 Hz and 220V ± 22V with harmonic content up to 5% or 400 Hz frequency and voltage of 28 Gts/-12Gts 115 ± 5,75 V or 220 V ± 11 V;
The power consumed by the device on the network at a nominal voltage not exceeding 120V ∙ A;
Frequency device CH3-49 electron-counting with a choice of limits retains its specifications within 8 hours of continuous operation.Continuous operation time does not include the time required to establish the operating mode;
Normal conditions of use (operation):
Ambient temperature - 20 º C ± 5 º C;
Relative humidity - 65% ± 15%;
Atmospheric pressure - 100kPa ± 4kPa (750mm.rt.st. ± 30mm.rt.st.);
Power supply network - 220V ± 4,4 V;
Input frequency - 50 Hz ± 0,5 Hz;
Harmonic content - up to 5%;
Working conditions of use (operation) of the device frequency CH3-49 electron-counting with a choice of limits:
Ambient air temperature - from +5 º +40 º C SDS;
Relative humidity - 95% at +30 º C;
Atmospheric pressure - from 60kPa to 106kPa (from 460mm.rt.st. 800mm.rt.st before.);
Limiting conditions of transportation of the device frequency CH3-49 electron-counting with a choice of limits:
Ambient air temperature - from -50 º C +60 º SDS;
Relative humidity - 95% at +30 º C;
Atmospheric pressure - from 60kPa to 106kPa (from 460mm.rt.st. 800mm.rt.st before.);
After exposure to extreme conditions while holding the device in normal conditions for at least 2 hours;
Dimensions - 490h136h480mm;
Weight of the device frequency CH3-49 electron-counting with a choice of limits without packaging - no more than 18kg;
Mean time between failures - at least 3,000 hours;
Average life instrument frequency CH3-49 electron-counting with a choice of limits - 10 years;
Average life - 10,000 hours.

Photos CH3-49

Ch3-49 device image.
Ch3-49 device image.
Ch3-49 side view.
Ch3-49 side view.
Ch3-49 rear view.
Ch3-49 rear view.


Яндекс цитирования