Electrical measuring instruments >> combination devices

Shch302

39 999 RUB
15 999 UAH
available:
2 pieces

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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.
Shch302 device image.


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