Helmholtz Coils
Helmholtz Coils
• HS 5136  HallSensor
• HHS 520198 Helmholtz Coils
• HHS 52016 Helmholtz Coils
• HHS 520281  Circular Helmholtz Coil
• HHS 52029  Circular Helmholtz Coils
• HHS 520320 Helmholtz Coils  Build To Order ONly
• HHS 520436 Helmholtz Coils
• HHS 520412 Helmholtz Coils
• HHS 5204 Helmholtz Coils For Calibration Purposes  Build To Order ONly
• HHS 52068  Circular Helmholtz Coils
• HHS 520616 Circular Pair Of Helmholtz Coils
• HHS 5206132 Schwarbeck Circular Helmholtz Coil
• HHS 5210 Helmholtz Coils
• HHS 521010 Helmholtz Coils
• HHS 5210100 Helmholtz Coils
• HHS 5210100 2.5  Helmholtz Coils
• HHS 5212 Helmholtz Coils
• HHS 5213 Helmholtz Coils
• HHS 521350 Helmholtz Coils
• HHS 5213100 Helmholtz Coils
• HHS 5215 Helmholtz Coils
• HHS 5215100 Helmholtz Coils
• HHS 5218 Helmholtz Coils
• HHS 5230100 Pair Of Helmholtz Coils
• NFCN 9731100 Matching Network
• NFCN 9732 Compensation Network
HelmholtzCoils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The field strength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current.
Therefore HelmholtzCoils are ideally suited for the calibration of magnetic field probes or sensors.
Typical applications are magnetic immunity testing according to automotive standards or MIL461F. When generating magnetic fields with Helmholtz coils the coil current is directly proportional to the magnetic field strength.
Magnetic Field Distrubance Tests
The tests against magnetic field disturbances can be classified in two categories:
· DC testing: in this case the field doesn´t change with the frequency. In DC testing the maximum fields are in the order of 30004000 A/m. In DC testing you must use dedicated radiating loops or Helmholtz coils (FESP 51331330 can be only used in DC testing). In DC Testing you need a radiating loop or an Helmholtz coil, DC power supply and Hall sensor.
· AC testing: in this case the field changes with the frequency.
In AC testing the maximum fields are in the order of ~1000 A/m.
In AC testing you must use dedicated radiating loops or Helmholtz coils (FESP 5132, HHS 520616 for example). In AC testing you need a radiating loop or an Helmholtz coil, RF amplifier LFPA 9733, SHUNT, compensation network NFCN 9734 and monitoring loops.
To determine which coils are required, the following information must be provide the sizes of the device under test (DuT).
For DC testing: maximum field to be reached (3000 A/m, 4000 A/m?).
For AC testing the customer must check the attached document and inform us about the normative that they are using. Each normative gives a well defined field as a function of the frequency. When we will have these information, we can design a system.
HS 5136  HallSensor
The hall probe HS 5136 can be used to measure magnetic field strengths for immunity tests according to MIL STD 461 and various automotive standards. It measures static and dynamic magnetic fields with a field strength up to 8000 A/m. The HS 5136 is a transverse probe, i.e. the magnetic flux lines must be orthogonal to the longitudinal probe axis and orthogonal to the surface of the hallelement to obtain the maximum reading.
Nominal frequency range: 
DC  10 kHz 

Useable frequency range: 
DC  200 kHz 

Nominal measuring range: 
0  7000 A/m 

Extended measuring range: 
0  8000 A/m 

Nominal conversion factor: 
1 (A/m)/mV 

Load impedance: 
>2 kΩ 

Nonlinearity.: 
0.8 % 

Power supply: 
+(27  33) V / 50 mA 

Housing: 
Aluminium 

Dimensions: 
ca. 470 x 42 x 28 mm 

Mounting: 
22 mm Tube 

Weight: 
310 g 

Connector: 
BNCfemale 
HS 5136 Hall Sensor for Magnetic Field Measurements Data Sheet
HHS 520198 Helmholtz Coils
· Helmholtz Coils circular up to 64 kA/m
· 200 kHz for DuT size 45 mm
Schwarzbeck Circular Helmholtz Coils HHS 520198 Data Sheet
HHS 52016 Helmholtz Coils
· Helmholtz Coils circular up to 2860 A/m
· 5 MHz for DuT size 45 mm
Schwarzbeck Circular Helmholtz Coils HHS 52016 Data Sheet
HHS 520281  Circular Helmholtz Coil
HelmholtzCoils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The field strength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current. Therefore the HHS 520281 is ideally suited for the calibration of magnetic field probes or sensors. Due to the high temperature proof copper wire packet it is possible to generate magnetic fields up to approx. 3000 A/m for short times. Typical applications are magnetic immunity testing according to automotive standards or MIL461. When generating magnetic fields with Helmholtz coils the coil current is directly proportional to the magnetic field strength.
Number of turns: 
81 

Maximum Coil Current: 
6 A (5 min.) 

Nominal Coil Current: 
5 A continuous 

Coil Spacings (centered): 
116 mm / 132 mm 
The following data refers to a coil separation of 116 mm
Max. Magn. Field Strength: 
3000 A/m (5 min.) 

Nominal Magn. Field Strength: 
2000 A/m continuous 

Magn. Field Strength, 1 A Coil Current: 
500A/m 

Coil Diameter: 
232 mm 

Mechanical Dimensions: 
0.20 m x 0.25 m x 0.39 m 

Max. cubical shaped DuT: 
11.3 cm x 11.3 cm x 11.3 cm 

Terminals: 
4 mm female 

Inductance (Single Coil): 
2.83 mH 

Inductance (Coil Pair): 
6.42 mH 

Usable Frequency Range: 
DC  300 kHz 

Resonance Frequency: 
> 400 kHz 

Weight: 
4.7 kg 
Schwarzbeck HHS 520281 Circular Helmhotz Coil Data Sheet
HHS 52029  Circular Helmholtz Coils
HelmholtzCoils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The field strength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current. Therefore the HHS 52029 is ideally suited for the calibration of magnetic field probes or sensors. Due to the high temperature proof copper wire packet it is possible to generate magnetic fields up to approx. 3000 A/m for short times. Typical applications are magnetic immunity testing according to automotive standards or MIL461. When generating magnetic fields with Helmholtz coils the coil current is directly proportional to the magnetic field strength.
Number of turns: 
9 

Maximum Coil Current: 
55 A (5 min.) 

Nominal Coil Current: 
33 A continuous 

Coil Spacings (centered): 
116 mm / 132 mm 
The following data refers to a coil separation of 116 mm
Max. Magn. Field Strength: 
3053 A/m (5 min.) 

Nominal Magn. Field Strength: 
1832 A/m continuous 

Magn. Field Strength, 1 A Coil Current: 
55.52 A/m 

Coil Diameter: 
232 mm 

Mechanical Dimensions: 
0.20 m x 0.25 m x 0.39 m 

Max. cubical shaped DuT: 
11.3 cm x 11.3 cm x 11.3 cm 

Terminals: 
4 mm female jacks 

Inductance (Single Coil): 
36 µH 

Inductance (Coil Pair): 
80 µH 

Usable Frequency Range: 
DC  2.5 MHz 

Resonance Frequency: 
> 3.5 MHz 

Weight: 
4.9 kg 
Schwarzbeck Maximum Magnetic Field Strenght of HHS 52029 with LFPA 9733
Schwarzbeck HSS 52029 Circular Helmhotz Coil Data Sheet
Schwarzbeck Overview MagTestSystem combinations for Immunity Testing Data sheet
HHS 520320 Helmholtz Coils  Build To Order ONly
· Helmholtz Coils
· circular
· Diameter 300 mm
· 330 A/m for Calibration or Immunity
Schwarzbeck Circular Helmholtz Coils HHS 520320 Data Sheet
HHS 520436 Helmholtz Coils
· Helmholtz Coils
· circular
· diam. 400 mm
· 2500 A/m
· 150 kHz
· MILSTD 461E
Schwarzbeck Circular Helmholtz Coils HHS 520436 Data Sheet
HHS 520412 Helmholtz Coils
· Helmholtz Coils
· circular
· diam. 400 mm
· 2500 A/m
· 500 kHz
· MILSTD 461E
Schwarzbeck Circular Helmholtz Coils HHS 520412 Data Sheet
files for the MagTest software
HHS 5204 Helmholtz Coils For Calibration Purposes  Build To Order ONly
· Helmholtz Coils for Calibration purposes
· circular
· diam. 420 mm
· 5 turns f. 60 A/m
Schwarzbeck Circular Helmholtz Coils HHS 5204 Data Sheet
HHS 52068  Circular Helmholtz Coil
Number of turns: 
8 
Maximum Coil Current: 
55 A (5 min.) 
Nominal Coil Current: 
34 A continuous 
Coil Spacings (centered): 
300 mm 
Max. Magn. Field Strength: 
1060 A/m (5 min.) 
Nominal Magn. Field Strength: 
650 A/m continuous 
Magn. Field Strength, 1 A Coil Current: 
19.23 A/m 
Coil Diameter: 
600 mm 
Max. Cubical shaped DuT: 
32.5 x 32.5 x 32.5 cm 
Mechanical Dimensions: 
0.64 m x 0.79 m x 0.42 m 
Terminals: 
4 mm female 
Inductance (Single Coil): 
91 µH 
Inductance (Coil Pair): 
200 µH 
Usable Frequency Range: 
DC  800 kHz 
Resonance Frequency: 
> 1500 kHz 
Weight: 
17.0 kg 
Recommended accessories: 
NFCN 9732 85 kHz 
Schwarzbeck HHS 52068  Circular Helmholtz Coil Data Sheet
Recommended accessories:
NFCN 9732 85 kHz  Compensation Network
The compensation network NFCN 9732 85 kHz consists of a high current/ high voltage variable capacitor. The compensation capacitor reduces the total impedance of the series circuitry consisting of the Helmholtz coil HHS 52068 and the NFCN 9732 85 kHz at the operating frequency band of 8090 kHz. It allows continuous currents of up to 15 Arms at generator voltages of less than 40 Vrms. Application: Immunity test induktive changing 85 kHz
Schwarzbeck NFCN 9732 85 kHz  Compensation Network Data Sheet
HHS 520616 Circular Pair Of Helmholtz Coils
· Circular pair of Helmholtz coils
· diameter 600 mm
· up to 2100 A/m
· max. current 55 A
Schwarzbeck Circular Helmholtz Coils HHS 520616 Data Sheet
HHS 5206132 Schwarbeck Circular Helmholtz Coil
Schwarbeck Circular Helmholtz Coil HHS 5206132
HelmholtzCoils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The fieldstrength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current. Therefore the HHS 5206132 is ideally suited for the calibration of magnetic field probes or sensors. Typical applications are magnetic immunity testing according to automotive standards or MIL461F. When generating magnetic fields with Helmholtz coils the coil current is directly proportional to the magnetic field strength. The calibration of the magnetic field is finally traceable to a current measurement (or to a voltage drop at a known resistor). The Helmholtz Coil itself is usually considered as primary standard due to the easily calculable relation between current and field strength. If this relation should be controlled, a loop sensor or monitoring loop can be used to determine the actual field strength.
Specifications 

Number of turns (per Coil): 
132 
Maximum coil current: 
15 A, 5 min. 
Nominal coil current: 
10 A continuous 
Coil spacing: 
300 mm 
Maximum magnetic field strength: 
4713 A/m, 5 min. 
Nominal magnetic field strength: 
3142 A/m continuous 
Magnetic field strength @ 1 A Coil Current: 
314.2 A/m 
Current required for 1 A/m: 
3.183 mA 
Conversion Current Field strength (Coil factor): 
50 dB/m 
Coil diameter: 
600 mm 
Mechanical dimensions: 
0.64 m x 0.79 m x 0.42 m 
Max. cubical shaped DuT: 
32.5x32.5x32.5 cm 
Terminals: 
4 mm banana jacks 
Usable frequency range: 
DC  30 kHz 
Inductance (per coil): 
22.4 mH 
Inductance (pair of coils): 
49.9 mH 
Resistance by 20°C (per coil): 
1.42 
Resistance by 120°C (per coil): 
1.96 
Coil capacitance (pair of coils): 
174 pF 
Resonance frequency (Pair of coils): 
> 50 kHz 
Weight: 
27.5 kg 
Schwarbeck Circular Helmholtz Coil HHS 5206132 Data Sheet
HHS 5210 Helmholtz Coils
· Helmholtz Coils
· up to 300 A/m constant H field
· 1 m x 1 m
· 10 turns per coil
· EN 6100048, VDE 0847 part 48
Schwarzbeck Helmholtz Coils HHS 5210 Data Sheet
HHS 521010 Helmholtz Coils
Number of turns: 
10 
Maximum Coil Current: 
20 A (5 min.) 
Nominal Coil Current: 
10 A continuous 
Max. Magn. Field Strength: 
300 A/m (5 min.) 
Nominal Magn. Field Strength: 
150 A/m continuous 
Magn. Field Strength, 1 A Coil Current: 
15 A/m (Coil Dist. 0.4 m) 
Mechanical Dimensions: 
1.0 x 1.0 x 0.63 m 
Coil Separation acc. IEC 100048: 
0.40 m 
Coil Separation for best uniformity: 
0.57 m 
Terminals: 
4 mm female 
Inductance (per Coil): 
0.36 mH 
Usable Frequency Range: 
DC  150 kHz 
Resonance Frequency: 
> 600 kHz 
Weight: 
10 kg 
Schwarzbeck Helmholtz Coils HHS 5210 Data Sheet
HHS 5210100 Helmholtz Coils
· Helmholtz Coils
· up to 2183 A/m constant H field
· 1 m x 1 m
· 100 turns per coil
· EN 6100048, VDE 0847 part 48
Schwarzbeck Helmholtz Coils HHS 5210100 Data Sheet
HHS 5210100 2.5  Helmholtz Coils
HelmholtzCoils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The fieldstrength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current. The calibration of the magnetic field is finally traceable to a current measurement (or to a voltage drop at a known resistor).
Number of turns: 
100 

Maximum Coil Current: 
20 A (5 min.) 

Nominal Coil Current: 
15 A continuous 

Inner side length of the coil: 
1.0 m 

Electrical side length of the coil: 
1.04 m 

Maximum Coil Separation: 
0.70 m 

Usable Frequency Range: 
DC  10 kHz 

Inductance (per Coil): 
31.3 mH 

Resonance Frequency (Pair of Coils): 
>25 kHz 

Weight: 
56 kg 

Terminals: 
4 mm female 
The following data is valid for 0.4 m coil distance:
Coil Separation acc. IEC 100048: 
0.40 m 

Max. Magn. Field Strength: 
2900 A/m (5 min.) 

Nominal Magn. Field Strength: 
1746 A/m continuous 

Magn. Field Strength, 1 A Coil Current: 
145.54 A/m (Coil Dist. 0.4 m) 
The following data is valid for 0.566 m coil distance:
Coil Separation for best uniformity along an axes through the coil center: 
0.566 m 

Magn. Field Strength, 1 A Coil Current: 
124.66 A/m (Coil Dist. 0.566 m) 
Datasheet HHS 5210100 2.5
HHS 5212 Helmholtz Coils
· Helmholtz Coils
· up to 250 A/m H field
· 1.20m x 1.20 m
· 10 turns
Schwarzbeck Helmholtz Coils HHS 5212 Data Sheet
HHS 5213 Helmholtz Coils
· Helmholtz Coils
· 1.25 m x 1.25 m
· 50 turns per coil
· according to EN 551032 A.2.1.b)
Schwarzbeck Helmholtz Coils HHS 521350 Data Sheet
HHS 521350 Helmholtz Coils
Number of turns: 
50 
Maximum Coil Current: 
8 A (5 min.) 
Nominal Coil Current: 
5 A continuous 
Max. Magn. Field Strength: 
390 A/m (5 min.) 
Nominal Magn. Field Strength: 
240 A/m continuos 
Magn. Field Strength, 1 A Coil Current: 
48.5 A/m (coil Dist. 0.75 m) 
Coil Separation acc. IEC 100048: 
0.75 m 
Maximum Coil Separation: 
0.82 m 
Mechanical Dimensions: 
1.36 m x 1.36 m x 0.9 m 
Usable Frequency Range: 
DC  20 kHz 
Inductance (per Coil): 
10.5 mH 
Resonance Frequency (Pair of Coils): 
>30 kHz 
Weight: 
18 kg 
Terminals: 
4 mm female 
Schwarzbeck Helmholtz Coils HHS 521350 Data Sheet
HHS 5213100 Helmholtz Coils
· Helmholtz Coils
· 1.29 m x 1.29 m
· 100 turns per coil
Schwarzbeck Helmholtz Coils HHS 5213100 Data Sheet
HHS 5215 Helmholtz Coils
· Helmholtz Coils
· up to 200 A/m constant H field
· 1,5 m x 1,5 m
· 10 turns per coil
Schwarzbeck Helmholtz Coils HHS 5215 Data Sheet
HHS 5215100 Helmholtz Coils
· Helmholtz Coils up to 2000 A/m
· constant H field
· 1,5 m x 1,5 m
· 100 turns per coil
Schwarzbeck Helmholtz Coil HHS 5215100 Data Sheet
HHS 5218 Helmholtz Coils
· Helmholtz Coils up to 126 A/m
· constant H field
· 1,8 m x 1,8 m
· 10 turns per coil
Schwarzbeck Helmholtz Coils HHS 5218 Data Sheet
HHS 5230100 Pair Of Helmholtz Coils
· Pair of Helmholtz coils according to SAE J55117:
· 2 square coils with a side length of 3 m
· 100 turns
· max. 650 A/m
· each coil movable separately on a wheeled platform.
Schwarzbeck Helmholtz Coil Pair HHS 5230100 Data Sheet
Assembly Instructions for Helmholtz Coil Pair HHS 5230
NFCN 9731100 Matching Network
· Matching network for HHS 5230100 for the following frequencies: 16,666 Hz; 50 Hz; 60 Hz; 150 Hz; 180 Hz.
Recommended amplifiers:
· 2 units of AE Techron 7224.
Schwarzbeck Compensation Network NFCN 9731100 Data Sheet
NFCN 9732 Compensation Network
The compensation network NFCN 9732 is used for a series compensation of the HHS 5210100 at energetical mains frequencies of 50 to 60 Hz.
Datasheet NFCN9732
Schwarzbeck DC Magnetic Field Immunity Testing Overview
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