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Price:
on request
Product information updated 11 December 2024.
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Warranty:
12 months.
Warranty extension up to 5 years.
Terms of delivery:
To all regions of the country, international delivery.
Product information updated 11 December 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.
Technical characteristics
Shch302 device combined
Also, this device may be referred to: Shch-302, Shch 302.
Shch302 combined instrument used to measure DC, DC voltage and DC resistance.
Specifications Shch302:
Measuring ranges:
- Voltage - from 0 to 1 kV;
- Current - from 0 to 10 mA;
- Resistance - from 0 to 100 MOhm.
Measurement ranges and the corresponding limits of permissible basic error are presented in the table below:
| Instrument parameter | Measurement range | Output accuracy |
| Voltage | 1 mV | ±(0,2+0,2 (Uk/U-1)) |
| 10 mV | ±(0,1+0,05 (Uk/U-1)) | |
| 100 mV | ±(0,05+0,02 (Uk/U-1)) | |
| 1 V | ||
| 10 V | ±(0,06+0,02 (Uk/U-1)) | |
| 100 V | ||
| 1 kV | ||
| Current |
1 mA; 10 mA; 100 mA; 1 mA; 10 mA |
±(0,1+0,04 (Ik/I-1)) |
| Resistance |
100 Ohm; 1 Ohm; 10 Ohm; 1 MOhm; 10 MOhm |
±(0,1+0,04 (Rk/R-1)) |
| 100 MOhm | ±(0,5+0,2 (Rk/R-1)) |
For input devices Shch302 characteristics presented in the table below:
| Measurement range | Input characteristic | Permissible overload for 10 seconds | Measurement time | |
| 1 mV | Input impedance | ≥ 1 MOhm | 10 mV | 5 s |
| 10 mV | ≥ 10 MOhm | 100 mV | 0,6 s | |
| 100 mV | ≥ 100 MOhm | 1 V | 0,04 s | |
| 1 V | ≥ 1000 MOhm | 10 V; 100 V | ||
| 10 V | 10±0,1 MOhm | 200 V | 0,08 s; 0,2 s | |
| 100 V |
Voltage drop across the input |
≤ 0,1 mV | 10 mcA; 100 mcA | 0,128 s |
| 1 kV | ||||
|
1 mcA 10 mcA |
≤ 1 mV | 1 mA | 0,04 s | |
| ≤ 10 mV | 10 mA | |||
| 100 Ohms | Maximum current through the measured resistance | 10 mA | 1 kOhm | 0,04 s |
| 1 kOhm | 1 mA | 10 kOhm | ||
| 10 kOhm | 100 mcA | 100 kOhm | ||
| 1 MOhm | 10 mcA | 1 MOhm | ||
| 10 MOhm | 1 mcA | 10 MOhm; 100 MOhm | 0,2 s; 1 s | |
| 100 MOhm | 100 nA | 1000 MOhm | 8 s | |
Number of characters for the reference device Shch302 - 5.
Polarity selection of subbands and measurement - automatic (except subband 1 kV).
Selecting the type of work and measurements of sub-bands - manual and remote.
Output parameters:
- Logic "1" - from 2,4 V to 5,25 V;
- Logical "0" - from 0 to 0,4 V.
Input Signal:
- Logical "1" - from 2,0 V to 5,25 V;
- A logical "0" - from -0,4 V to 0,8 V.
Maximum permissible additional error caused by the deviation of the ambient temperature from normal to any temperature range from +10° C to +35° C is equal to the permissible basic error for every 10 K temperature deviation.
Warm-up time - no more than 1 hour.
Operating time without calibration and zeroing:
- On subband 1 mV - for at least 1 hour;
- The remaining subbands - not less than 16 hours.
Devices provide interference mitigation:
- Serial type voltage amplitude 50 Hz max Uk at U=0 and not more than 0,2 Uk at U=Uk is not less than 60 dB;
- Parallel type voltage frequency of 50 Hz at 1 kW input unbalance at least 80 dB;
- Parallel type DC voltage unbalance at the entrance 1k at least 100 dB.
Power supply is Shch302:
- Frequency - (50±1) Hz;
- Voltage - 220 V.
MTBF - not less than 2500 hours.
Life - at least 6 years.
Power consumption - 50 V·A.
Dimensions - 488×130×380 mm.
Unit weight Shch302 - not more than 11 kg.
In terms of resistance to mechanical stress and protection against environmental Shch302 devices are categorized ordinary.
Photos: Shch302
Shch302 device image.
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