600 mm Helmholtz Coils - Versión en Español (clic aquí)

Ferronato® - BH600-3-A

---  Desktop set of three pairs of Helmholtz coils, for laboratory and general purposes.

---  Suited for many magnetic measurements and experiments, in DC and AC.

  • Equal generating field rate for the three pairs: 216 µT/A

  • Accurately made, with error smaller than ±1% in the generated field.

  • Thanks to its simple support and its joins by screws the coil arrengement can be modified with relative facility.

  • Coils on aluminium alloy forms.

  • Each aluminium form provides a usable extra turn, with connection in the terminal block. An application example is the generation of a small magnetic field (DC or AC) to modulate the main one. Also it can be wired to generate small gradients. (- Click here for more details -)

  • The aluminium forms also act like electrostatic screens.

  • The coils can undergo heatings of until at least 100 ºC without damage.

  • Robust construction but with a reasonable weight.

  • Totally constructed with non-ferromagnetic materials.

  • Excellent quality/price ratio.

  • There are versions of one and two axis available, with similar characteristics:

    • BH600-2-A  Set of two pairs (two axes), X and Y.

    • BH600-1-A  Set of one pair (one axis), X.

 

SPECIFICATIONS OF THE SET

Field/Current ratio: 216 µT/A (2,16 Gauss/A). For each pair, X, Y or Z. Maximum error: ±1%.
Maximum field: 864 µT (8.64 Gauss) in permanent mode / 2.2 mT (22 Gauss) during 2 minutes. Each pair.
Maximum current: 4.0 A in permanent mode / 10 A during 2 minutes (start temperature: 20 ºC). Each pair.
Isolation voltage: 250 V DC minimum, between windings and their forms and between pairs. Tested to 500 V DC.
Magnetic field homogeneity: Differences smaller than ±1% with respect to the centre, in a spherical volume of 150 mm of diameter centred in the coils. Differences smaller than  ±5%  in a spherical volume of 220 mm of diameter. Volumes to 1% and 5% greater in some directions.
Connection: Connection block with Ø4 mm screws (M4).
Maximum working temperature: 80 ºC for the set / 100 ºC for the coils.
Coil cross section: Winding: 8.5 x 10 mm, maximum. Total (form): 10 x 13 mm
Materials: Copper winding. Coil forms of aluminium alloy, with connection blocks of resin/glass fibre (FR4) with PVC covers. Stand support of PVC (rigid PVC in pillars, foamed PVC in plates superior and inferior), with brackets of Acetal. Screws of nickel-plated brass and Nylon.
Maximum dimensions: Height 678 mm x Wide 609 mm x Depth 576 mm.
Weight: 10.8 kg for the BH600-3-A set (smaller for BH600-1-A/2-A).
Accessories: Delivered with Instructions of Use in Spanish and English.
Warranty: Two years.

SPECIFICATION FOR EACH COIL PAIR

  X pair (large) Y pair (medium) (2) Z pair (small) (3)
Effective diameter: 600 ±1 mm 567 ±1 mm 533 ±1 mm
Turns number: 72 68 64
DC Resistance, at 20 ºC:                                      (1) 5.9 Ω ±3% 5.3 Ω ±3% 4.7 Ω ±3%
Self-inductance: 18.2 mH  ±5% 15.2 mH  ±5% 12.6 mH  ±5%
Self-resonance Frequency:
(With one form end connected to one coil end)		 ~ 16 kHz ~ 17 kHz ~ 19 kHz
 
Secondary field generated by the forms when used as coils (Xs, Ys, Zs):                                              (4) 2.99 µT/A  ±1% 3.17 µT/A  ±1% 3.37 µT/A  ±1%

(1) - Resistance measured at the general connection block.

(2) - Pair not included in the BH600-1-A set version.

(3) - Pair not incluided in the BH600-1-A and BH600-2-A set versions.

(4) - We call this constuctive idea "In-Circuit Coils Forms".  - Click here for more details -

- These specifications are subject to change without prior notice -

- The set is supplied mounted and ready to use, in a wooden box.

- BH1300-3-A model page - click here -

- BH300-3-A model page - click here -

- To obtain this page in PDF format,click here -

 

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  Updated: 28 nov 2006