Cropico 5/6/8 Decade Resistance Box
005/6/8 High Accuracy Resistance Decade Boxes
5, 6 & 8 Decades + Special Models for Pt100 Simulation
A versatile range of resistance boxes available in 5, 6 & 8 decades. High Accuracy and wide range 0.001 ohm to 11 Megohms are combined in a compact lightweight case. The switches have gold plated contacts to ensure a low contact resistance and negligible thermal emf.
Some models are particularly suited to Pt100 simulation with resolution as low as 0.001 ohm (0.0025°C).
Technical Specification
|
Model |
No. Decades |
Total Resistance |
Resolution Ω |
Resolution °C when simulating Pt100 |
Residual Resistance |
|
005-B |
5 |
1,112.10 ohm |
0.01 |
0.025 |
1 ohm |
|
006-A |
6 |
1,112.11 ohm |
0.001 |
0.0025 |
1 ohm |
|
006-B |
6 |
11,112.10 ohm |
0.01 |
0.025 |
1 ohm |
|
006-C |
6 |
111,111 ohm |
0.1 |
N/A |
70 milliohm |
|
008-A |
8 |
111,112.11 ohm |
0.001 |
0.0025 |
1 ohm |
|
008-B |
8 |
1,111,112.1 ohm |
0.01 |
0.025 |
1 ohm |
|
008-C |
8 |
11,111,111 ohm |
0.1 |
N/A |
80 milliohm | |
|
008-C |
008-B |
008-A |
006-C |
006-B |
006-A |
005-B |
Decade |
Accuracy |
Current Max |
|
|
|
✓ |
|
|
✓ |
|
10 x 0.001 Ω |
± 2% |
1.4 A |
|
|
✓ |
✓ |
|
✓ |
✓ |
✓ |
10 x 0.01 Ω |
± 1% |
1.4 A |
|
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
10 x 0.1 Ω |
± 0.5% |
1.4 A |
|
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
10 x 1 Ω |
± 0.1% |
300 mA |
|
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
10 x 10 Ω |
± 0.01% |
100 mA |
|
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
10 x 100 Ω |
± 0.01% |
30 mA |
|
✓ |
✓ |
✓ |
✓ |
✓ |
|
|
10 x 1 kΩ |
± 0.01% |
18 mA |
|
✓ |
✓ |
✓ |
✓ |
|
|
|
10 x 10 kΩ |
± 0.01% |
5 mA |
|
✓ |
✓ |
|
|
|
|
|
10 x 100 kΩ |
± 0.01% |
1.8 mA |
|
✓ |
|
|
|
|
|
|
10 x 1 M Ω |
± 0.01% |
0.5 mA | |
| Switches |
Contact material gold plated brass
Contact Resistance <5 m W
Insulation Resistance (all paths > 1012 Ω)
Proof Voltage 1 kV |
| Resistance Coils |
Temperature Co-efficient
± 3ppm/ +20°C to +85 °C
±5ppm maximum over -55 °C to +125 °C
0.1, 0.01 and 0.001 dials
10 ppm/°C
Full Load Stability
±35 ppm/ 10,000 hours
±50ppm/ 26,000 hours
No Load Stability
±25 ppm/ 10,000 hours
±35ppm/ 26,000 hours
over full temperature range: -55°C to 125 °C |
| Power Rating |
0.33 watt (+85 °C)
0.25 watt (+110 °C) |
| Maximum Continuous Working Voltage |
Up to 250V DC |
| Noise |
Essentially non-measurable
<1.5µV/µ°C max |
| Thermal EMF |
<0.4µV/°C typical |
| Encapsulation |
Moulded Epoxy |
| Leads |
22 SWG tinned copper |
| Windings |
Exclusive 'air cushion' technique provides virtually stressless elements for improved performance. Non inductively wound. Direction of winding reversed at half turns point. |
| Size |
350 x 100 x 80 mm |
| Weight |
< 2.2 lbs. (1 kg) NAMAS Certification Optional | |
Product Matrix
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