Fluke 7004N - Nanoscan Volt Maintenance System

• Ultra-Stable Statistical 10-Volt DC Voltage Reference Standard
• Accepts between 4 and 10 Reference Modules
• 10-Volt Average, Buffered 10-Volt Average and Average 1.018-Volt Outputs
• Built-in Solid-State Scanner and Null Detector for Intercomparing Reference Modules or External References with 10-Volt Average
• Automatic Intercomparisons Using Fluke"s PC-based Volt Maintenance Software
• Input for Josephson Junction Standard
• Full Polarity Reversal Capabilities

Between 4 and 10 reference modules

Each Nanoscan system consists of one or more Model 7000 solid-state zener reference modules that plug into a mainframe chassis. The 10-Volt ouputs from these modules are routed via an analog signal backplane to the Nanoscan module where they are averaged to produce an ultra low-noise hardware Average 10 Volt output.

High sensitivity null detector

The Nanoscan module also contains a high-sensitivity (0.01ppm resolution) null detector that compares individual 10-Volt reference outputs with the Average output, enabling you to verify the stability of each reference to a very high confidence level. Individual references can also be switched in and out of the hardware average to evaluate their overall contribution.

Simple integration of external reference standards

In addition to intercomparing individual internalreferences to the system average, the null detector can also be used to measure external reference standard, providing an easy method of importing or exporting traceability from the Nanoscan system.

10-Volt Average, Buffered 10-Volt Average and Average 1.018-Volt Outputs

The Nanoscan module also generates a buffered 10V output to drive resistive loads such as Kelvin Varley dividers, and a 1.018V output for comparison with Weston cells.

Automatic intercomparison using 7050 volt maintenance software

Although the Nanoscan can be driven manually via its front panel controls, the full benefits of process automation is achieved when you use it with the 7050 Volt Maintenance Software. This software, which runs under WindowsTM95 or NT, enables you to initiate scan sequences and log all the results into an ExcelTM spreadsheet for later analysis.

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7004N/7010N

10V Output Stability 7004N: 90 days: 0.8ppm 1 year: 1.2ppm 7010N: 90 days: 0.7ppm 1 year: 1.0ppm Predictability 7004N: ±0.2 ppm/year typicalAfter 5 points, 3 mo. apart 7010N ±0.1 ppm/year typical After 5 points, 3 months apart Temperature Coefficient (15 - 35°C) 7004N: < 0.03 ppm/° 7010N: < 0.02 ppm/° Noise (rms) 7004N: 0.05 to 10Hz: < 0.05 ppm RMS Standard deviation of 90 day regression: < 0.06 ppm 7010N: 0.01 to 10Hz: < 0.03 ppm RMS Standard deviation of 90 day regression: < 0.04 ppm Hysteresis recovery 7004N: < 0.1 ppm (after conditioning cycle and battery discharge) 7010N: < 0.07 ppm (after battery discharge) Output Resistance 7004N/7010N: 500/n Ohm Where n = number of modules fitted 10V 4 wire Output (relative to Average) Offset < ±1µV Output Current 12mA max. Load Regulation Zero to 2mA: < 0.1 ppm 2mA to 12mA: < 0.5 ppm External Standard Input Range: +9.990 to +10.010V Input Impedance: 100 Mohm + 10pF (typic Null Detector Range -9999.9 µV to +9999.9 µV Measurement Errors Chan. to Average: ± 0.3% of difference Chan.to out of Average: ± 0.1% of difference External Standard: ± 0.001% Chan. to Chan.: ± 0.1 µV Oven Temperature Monitor Accuracy: ± 3°C Stability/Repeatability: : ± 0.1°C/year Battery Type NiMH Backup Period 16 hrs from fully charged Recharge time (typical) 2 hours Half Life 5 yrs Environment Temperature Operating: +15°C to 35°C Transit: -18°C to 45°C Warm-up period: 20 min to ±0.2 ppm 2 hours to final value General Specifications Power, battery life 7004N: < 6W 7010N: < 12W 12V DC Connection Yes Dimensions 7004N: 133 x 449 x 355 mm (5.24 x 17.68 x 13.19 inch) 7010N 265 x 449 x 355 mm (10.43 x 17.68 x 13.19 inch) Weight 7004N: 9.6kg (21.2Ibs) 7010N: 20kg (44.1Ibs) Safety UL3111, CE marked EN61010-1-1:1993/A2:1995 CETL