BigRef

Large-area reference cell for sun simulators

Calibrate your sun simulators with utmost precision thanks to IMT Technology’s large-scale BigRef reference cell.

With its extremely precise calibration, BigRef allows users to determine the irradiance intensity of sun simulators precisely. BigRef is also suitable for determining local non-uniformities in sun simulators for PV modules. 

The size of the solar cell as a sensor element brings considerable advantages compared to more compact WPVS reference cells since the size of the cell surface compensates for the non-uniformities in irradiation intensity to a certain extent.

Big Ref was developed and designed in cooperation with the solar cell calibration laboratory at the ISFH CalTeC in the German town of Hamelin.

Benefits & Features

  • PV reference cell for calibrating and measuring sun simulators
  • PV reference cell to measure non-uniformities in sun simulators as per IEC 60904-9
  • Excellent linearity for Isc, significantly above IEC 60904-10 requirements
  • Design as per IEC 60904-2
  • Excellent thermal attachment of the PV cell to the rear panel
  • Pt100 as per IEC 60751 class A to measure cell temperature
  • Developed and designed in cooperation with the Institute for Solar Energy Research (ISFH)
  • Developed and manufactured in Germany

Further information

Type Bild Signal Uncertainty witch DAkkS calibration ISO 17025Bild
BigRef-IV-03

I-V curve, 4-wire connection Typ. 1,2% (max. 1,4%)
BigRef-mV-03

Shunt voltage approx. 80 mV @ STC Typ. 1,6% (max. 1,8%)
Sensor elementMonocrystalline silicon PV cell 156.75 x 156.75 mm², pseudo-square, 
vendor: BigSun, type: B156X1D4A-2020
Linearity at 25°CTypical 0.1 % in the range of 100 to 1200 W/m²
Temperature coefficient IscTypical 0,0005 1/K
Temperature measurement PV cellPt100 Klasse A as per IEC 60751
Case size / degree of protection210 mm x 210 mm x 12,4 mm / IP 50
 Case materialBlack anodized aluminium
Connection cable PV cellASS 3x2x0.5 mm², shielded, red, 2 m length
Connection cable Pt100LiYCY 2x2x0.14 mm², shielded, black, 2 m length
Operating temperature+5 to +70 °C
Customs tariff number90 25 19 20

Optionen

  • DakkS / IS0 17025 calibration in relation to spectrum as per IEC 60904-3
  • Measurement of spectral response as per IEC 60904-8
  • Measurement of linearity as per IEC 60904-10
  • Custom-specific PV cell

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