Fluke Current Shunt
A40B Series Fluke Current Shunt
A40B Series Fluke Current Shunt

A40B Series Fluke Current Shunt

The A40B dc and ac Fluke Current Shunt set is a collection of 14 current shunts, adapters, and connectors. It is designed for measuring currents ranging from 1 mA to 100A in laboratory settings.

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Features of A40B Series Fluke Current Shunt

  • Simplified calibration/verification of precision calibrators and current sources
  • Shunt sizes available for currents ranging from 1mA to 100A
  • Usable across the dc to 100 kHz frequency range
  • Includes 14 individual dc and ac current shunts covering a 1, 2, 5 sequence over 6 decades of current
  • Allows for simple direct measurements, eliminating the need for ac/dc transfers
  • Demonstrates stability typically better than ± 5.0 µΩ/Ω for one year
  • Offers a typical angular accuracy better than ± 0.003º at 1 kHz

 

Applications of A40B Series Fluke Current Shunt

  • Commonly used for controlling large air conditioning systems.
  • Used in the control of lighting systems.
  • Commonly utilized for compressor control in refrigeration systems.
  • Enables normal start-stop and reverse operation in motor control.
  • Used to control the connection and disconnection of capacitors in power capacitor banks.
  • Applied in the automation control of industrial production lines.

Specification of A40B Series Fluke Current Shunt

Basic Electrical Specification Summary

Shunt
Nominal
Current		 Nominal
Resistance
(Ohms)		 Basic Specification ±μA/A, TCal ±1 °C, ≤50 % RH
DC 1 kHz 10 kHz 30 kHz 100 kHz
1 mA 800 20 55 75 75 150
10 mA 80 20 26 26 26 26
20 mA 40 20 26 26 26 26
50 mA 16 20 23 23 23 23
100 mA 8 20 24 24 24 24
200 mA 4 20 26 26 26 26
500 mA 1.6 21 27 27 27 28
1 A 0.8 21 27 28 28 31
2 A 0.4 21 27 30 30 48
5 A 0.16 21 31 32 40 71
10 A 0.08 26 37 60 61 92
20 A 0.04 26 43 52 70 113
50 A 0.016 32 55 80 81 144
100 A 0.008 35 65 90 98 174

Maximum AC-DC Difference

Shunt Nominal Current: Maximum AC-DC Difference (± ppm)1,2
1 kHz 100 kHz
1 mA3 53 150
10 mA 20 40
20 mA 18 30
50 mA 13 16
100 mA 14 27
200 mA 17 28
500 mA 17 21
1 A 17 23
2 A 17 44
5 A 23 69
10 A 28 98
20 A 37 150
50 A 47 180
100 A 60 300
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.

General Specifications
Calibration Documentation 17025 accredited report of calibration included
Dimensions (maximum)
Shunt Value:  1 mA to 2 A
Height:  70 mm (2.75 in)
Width:  70 mm (2.75 in)
Overall Length1: 124 mm (4.9 in)
Shunt Value:  5 A to 20 A
Height:  130 mm (5 in)
Width:  130 mm (5 in)
Overall Length1: 210 mm (8.25 in))
Shunt Value:  50 A and 100 A
Height:  200 mm (7.9 in)
Width:  200 mm (7.9 in)
Overall Length1:  343 mm (13.5 in))
1 Includes input and output connectors; subject to change by component vendor.
Physical/mechanical parameters
Shunt Value:  1 mA to 20 A
Weight:  0.7 kg (1.6 lb)
Input Connector:  Type-N (female)
Output Connector:  Type-N (female)
Shunt Value:  50 A and 100 A
Weight:  3.4 kg (7.5 lb)
Input Connector:  Type-LC (female)
Output Connector:  Type-N (female)
Operating environment
Temperature: 13 °C to 33 °C
Calibration temperature (TCal) range: 18 °C to 28 °C
Humidity range for best specification 1,2: ≤ 50 % RH
Altitude: 0 m to 3,000 m
1 Resistance stability is affected by humidity, but changes are reversible.
2 If the shunts are calibrated outside this RH, stability specifications will be met as long as the shunts are stored and used at the same relative humidity ± 10 % RH.
Storage and transit environments (for models other than the 1 mA current shunt)
Temperature to avoid damage: -20 °C to 140 °C
Temperature and humidity to maintain performance1: 5 °C to 45 °C; 15 % to 80 % RH
Non-operating altitude: 0 m to 12,000 m
1 Storage at extremes of temperature or humidity will cause a temporary change of shunt resistance by up to ± 20 ppm. When subsequently stored or used within the limits of the operating environment, the shunts will recover to their original resistance value within 30 days.
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 specifications
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
Less than 90 days:  -20 °C to 40 °C
Less than one year:  -20 °C to 30 °C
Charging time (from fully discharged):  100 minutes
Maximum operating time between charges
Maximum output load (11 mA):  18 hours
High impedance load:  24 hours
Recommended cooling period:  100 minutes
  To prevent loss of battery capacity recharge at least twice per year.

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