A40B Series Fluke Current Shunt

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.