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Cropico RH9A Series

The RH9A Series by Cropico includes high resistance, high voltage decade boxes ideal for calibration of insulation testers rated up to 5000 VDC. These instruments use precision SP1 switches and specially selected resistors, housed in a rugged case, making them suitable for laboratory, workshop, or field environments.

  • Total Resistance: Up to 1 TΩ (1,000 GΩ)

  • Resolution: 1 kΩ

  • Maximum Voltage: 5000 VDC

  • Use Case: Calibration of high-voltage insulation testers and precision resistance simulation.

Model Options

Technical Specifications

Decade Accuracy @ 1kV Max Max V/Step Power Rating Temperature Coefficient
10 × 1 kΩ ±0.1% 30 V 1 W ±50 ppm/°C
10 × 10 kΩ ±0.1% 100 V 1 W ±50 ppm/°C
10 × 100 kΩ ±0.1% 300 V 1 W ±50 ppm/°C
10 × 1 MΩ ±0.1% 350 V 1 W ±50 ppm/°C
10 × 10 MΩ ±1% 3500 V 1.5 W ±100 ppm/°C
10 × 100 MΩ ±1% 4000 V 1.5 W ±100 ppm/°C
10 × 1 GΩ ±1% 5000 V 3.5 W ±100 ppm/°C
10 × 10 GΩ ±1% 5000 V 3.5 W ±250 ppm/°C
10 × 100 GΩ ±3% 5000 V 1.3 W ±2000 ppm/°C
10 × 1 TΩ ±3% 5000 V 1.3 W ±2000 ppm/°C

Model Configuration Table

Resistance Decade RH9A RH9A-1 RH9A-2 RH9A-3
10 × 1 kΩ Yes   Yes Yes
10 × 10 kΩ Yes   Yes Yes
10 × 100 kΩ Yes   Yes Yes
10 × 1 MΩ Yes   Yes Yes
10 × 10 MΩ Yes   Yes  
10 × 100 MΩ Yes   Yes Yes
10 × 1 GΩ Yes Yes   Yes
10 × 10 GΩ Yes   Yes Yes
10 × 100 GΩ Yes     Yes
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