Cropico RM8

Compact 8 decade resistance box with double pole switching

- Wide Range 0.01Ω to 1MΩ
- Accuracy 0.1%
- Power Rating 1W / Coil

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Cropico RM8

RM8 Resistance Decade / Total Resistance 1.1111111Megohm, Resolution 0.01ohm.

The model RM8 decade resistance box is designed to complement our range of resistance boxes, offering a very wide range 0.01ohm to 1Megohm in a compact and versatile unit. The low decade steps of 0.01ohm enables very high resolution, when simulating resistance values and the power rating is 1.0 watt per coil.

The RM8 uses double pole switching to minimize the effects of contact resistance. The lower value decades (0.01 and 0.1ohm) are manufactured from manganin resistance wire and the other decades from selected metal film resistors. This offers good stability combined with excellent load and temperature coefficients.

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Technical Specifications

Technical specification
Resistors	Rotary 2 pole in parallel, contacts silver plated brass with positive click mechanism. Insulation > 50,000 Megohm
Maximum Continuous Working Voltage	70Vdc / 33vrms
Switches	Insulated will accept 4 mm banana plugs and spade tags.
Residual Resistance	<0.1ohm
Terminals	2 binding posts will accept 4 mm banana plugs and spade tags. 1 terminal for connection to panel/earth
Test Voltage	1kV dc between terminals and panel
Size	254 x 145 x 80mm
Weight	0.95kg

Decade
10 x 100kohm	Accuracy: ± 0.1% Max. Current: 0.003A
10 x 10kohm	Accuracy: ± 0.1% Max. Current: 0.01A
10 x 1kohm	Accuracy: ± 0.1% Max. Current: 0.33A
10 x 100ohm	Accuracy: ± 0.1% Max. Current: 0.1A
10 x 10ohm	Accuracy: ± 0.5% Max. Current: 0.3A
10 x 1ohm	Accuracy: ± 1% Max. Current: 1.0A
10 x 0.1ohm	Accuracy: ± 5% Max. Current: 1.0A
10 x 0.01ohm	Accuracy: ± 10% Max. Current: 1.0A

Technical specification
Resistors	Rotary 2 pole in parallel, contacts silver plated brass with positive click mechanism. Insulation > 50,000 Megohm
Maximum Continuous Working Voltage	70Vdc / 33vrms
Switches	Insulated will accept 4 mm banana plugs and spade tags.
Residual Resistance	<0.1ohm
Terminals	2 binding posts will accept 4 mm banana plugs and spade tags. 1 terminal for connection to panel/earth
Test Voltage	1kV dc between terminals and panel
Size	254 x 145 x 80mm
Weight	0.95kg

Decade
10 x 100kohm	Accuracy: ± 0.1% Max. Current: 0.003A
10 x 10kohm	Accuracy: ± 0.1% Max. Current: 0.01A
10 x 1kohm	Accuracy: ± 0.1% Max. Current: 0.33A
10 x 100ohm	Accuracy: ± 0.1% Max. Current: 0.1A
10 x 10ohm	Accuracy: ± 0.5% Max. Current: 0.3A
10 x 1ohm	Accuracy: ± 1% Max. Current: 1.0A
10 x 0.1ohm	Accuracy: ± 5% Max. Current: 1.0A
10 x 0.01ohm	Accuracy: ± 10% Max. Current: 1.0A