The Valhalla Scientific 2701C is a programmable precision DC voltage calibrator engineered for calibration laboratories and industrial testing environments requiring high accuracy across extended voltage ranges. It delivers voltage outputs from 200 mV to 1200 V with resolution down to 100 nanovolts on the 200 mV range and adjustable stability to ±0.5 PPM at full scale. Factory accuracy spans ±20 ppm of setting + 1 µV (200 mV range) to ±15 ppm of setting + 2.5 µV (1200 V range), with one-year performance guaranteed to ±30 ppm or better. The instrument sources up to 25 mA drive current on all active ranges, with optional 0–120 mA capability at 80 ppm + 1.6 µA one-year accuracy.
Technical Specifications
Voltage Output Ranges:
• 200 mV, 2 V, 20 V, 120 V, 1200 V
Resolution & Accuracy:
• Resolution: 100 nV minimum (200 mV range); adjustable to ±0.5 PPM full scale
• Factory accuracy: 200 mV ±20 ppm + 1 µV; 2 V ±15 ppm + 4 µV; 20 V ±13 ppm + 13 µV; 120 V ±14 ppm + 250 µV; 1200 V ±15 ppm + 2.5 µV
• One-year accuracy: ±30 ppm of setting + 2 µV or better across all ranges
Current Sourcing:
• Standard: up to 25 mA on all active ranges
• Optional: 0–120 mA with one-year accuracy of 80 ppm + 1.6 µA
Noise Performance (10 Hz to 10 kHz):
• 200 mV: 25 µV RMS; 2 V: 80 µV RMS; 20 V: 130 µV RMS; 120 V: 500 µV RMS; 1200 V: 800 µV RMS
• Low Noise Option (LNF): Maximum output ±40 V with improved ultra-low-noise performance for ADC testing
Temperature Coefficient:
• 200 mV: 2.5 ppm/°C + 0.1 µV/°C; 2 V: 1.5 ppm/°C + 0.6 µV/°C; 20 V: 1.5 ppm/°C + 6 µV/°C; 120 V: 1.5 ppm/°C + 30 µV/°C; 1200 V: 1.5 ppm/°C + 300 µV/°C (applies outside ±5°C calibration window)
Output Impedance:
• 200 mV: 450 Ω; 2 V: <1 mΩ; 20 V: <5 mΩ; 120 V: <50 mΩ; 1200 V: <500 mΩ
– Key Features
• Automatic bipolar output capability
• 100% overrange protection
• Short-circuit damage-proof across all ranges
• Cover-on automatic calibration
• Illuminated high-voltage warning indicator
• Safety interlock for 1200 V range selection
• Warm-up: 15 seconds to 15 ppm; 30 minutes to rated specifications
– Typical Applications
Precision calibration of multimeters, data acquisition systems, and analog-to-digital converters in metrology laboratories and manufacturing test environments.
