The A40B dc and ac precision current shunt set consists of 14 low-inductance coaxial current shunts, adapters, connectors, and a rugged transit/storage case
The A40B dc and ac precision current shunt set consists of 14 low-inductance coaxial current shunts, adapters and connectors, and a rugged transit/storage case. Designed for currents from 1 mA to 100A, the current shunts are for laboratory use in making directly measured absolute ac or dc current measurements as well as ac/dc current transfer measurements. They exhibit outstanding resistance value stability, with an excellent self-heating power coefficient, and a low temperature coefficient. With all of these characteristics combined, the shunts offer direct measurement of current from dc to 100 kHz with higher accuracy than previous commercially available shunt technology. Now precision measurements can be made in a single step process rather than by more complex traditional ac/dc transfer methods.
|The following table shows the 1-year absolute accuracy specification stated at k=2, approximately 95 % confidence for the calibrated value. The specifications include 1-year stability, temperature effects over TCal ± 1 °C, and the measurement uncertainty of the calibrated value.|
|Shunt Nominal Current:||Specification ± μA/A, TCal ±1 °C, ≤ 50 % RH 1,2,3,5|
|DC||1 kHz||100 kHz|
|1 The measured current is determined from: I = (V/Rcalibrated) ×(1 + (AC-DCcalibrated /1,000,000)); where AC-DC calibrated is expressed in ppm.
2 Above 1 kHz interpolate the specification (si) between frequencies fupperand flower using:
si = slower + (fi – flower) × (supper – slower) ÷ (fupper – flower)
3 Add 20 μA/A if relative humidity is outside specification limits.
4 1 mA specifications apply with the battery charger disconnected.
5 Specifications assume no loading effects due to the voltage-sensing device. See Output Voltage Measurement – Loading Effects in the operating information.
|Shunt Nominal Current:||Maximum AC-DC Difference (± ppm)1,2|
|1 kHz||100 kHz|
|1 Specifications indicate the maximum flatness deviation from dc, and include both measured AC-DC difference and the uncertainty of measurement. They are stated at k=2, approximately 95 % confidence.
2 Includes 1-year stability of the AC-DC difference.
3 Specifications for the 1 mA current shunt are for TCal ± 1 °C.
|Calibration Documentation||17025 accredited report of calibration included|
|Storage and transit environments (for models other than the 1 mA current shunt)||
|Additional 1 mA current shunt specifications|
|Output resistance||8 mΩ|
|Maximum safe output current||11 mA (e.g., 1 V output into 90 Ω)|
|Maximum capacitive load||800 pF|
|Output voltage regulation||15 ppm/100 pF|
|Maximum output dc v offset||± 100 μV (typical ± 25 μV)|
|Typical error @ 1 MHz||< 2 %|
|Battery size||AAA (44.5 mm x 10.5 mm)|
|Battery technology||Nickel-Metal Hydride (NiMH)|
|Number of batteries required||8 (in 2 groups of 4)|
|Nominal battery voltage||1.2 V (4.8 V per group of 4)|
|Typical battery capacity||800 mAh|
|Storage and transit environment to preserve the batteries||
|Maximum operating time between charges||
|A40B-ADAPT/LC||LC Male to LC Male adapter|
|A40B-ADAPT/LCN LC||Female to N Male inter-series adapter|
|A40B-CAL/LC||High current adapter to connect two shunts in series for measurement (LC to LC)|
|A40B-CAL/N||Low current adapter to connect two shunts in series for measurement (N to N)|
|A40B-CASE||Fiberglass Transit Case|
|A40B-LEAD/4MM||N to 4 mm double banana connector|
|A40B-LEAD/N||N Male to N Male lead|