CH3-49 CH3-49
4.9 63
Frequency CH3-49 electron-counting with a choice of limits (CH349, CH3 49, CH-349, CH 349)
Intended 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.
The instrument measures the frequency and sinusoidal wave signal:
- 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.

Products catalog

Radiometric devices
frequency counters, synthesizers, frequency standards (CHrs, frequency standards (Ch2-, Ch3-, Ch7-, RCh and others)
frequency counters Ch3
Ch3-49 device image.

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Product information updated 08 October 2024.

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12 months.

Warranty extension up to 5 years. 

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Product information updated 08 October 2024.

Found cheaper?

Let us know. Our price is the best. 

Warranty:

12 months.

Warranty extension up to 5 years. 

Terms of delivery:

To all regions of the country, international delivery. 

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Technical characteristics

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
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.
Rate the product: CH3-49
Number of views: 1791
Product rating: 4.3
Number of grades: 436
* rating and all product statistics are updated once a month; information is current as of 22 October 2024

Photos CH3-49

Ch3-49 device image.

Ch3-49 device image.

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Ch3-49 side view.

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