MAPAN

, Volume 32, Issue 1, pp 23–23 | Cite as

Erratum to: Development of an Automated Precision Direct Current Source for Generation of pA Currents Based on Capacitance Charging Method at CSIR-NPL

Erratum
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1 Erratum to: MAPAN-Journal of Metrology Society of India DOI 10.1007/s12647-016-0186-0

Few entries in Table 5 were incorrect in the online published article.

The correct table is given below (Table 5).
Table 5

Uncertainty evaluation

Uncertainty contribution in current measurement

100 pA

10 pA

1 pA

1. Due to ramp

10 fA

1 fA

0.1 fA

2. Due to differentiating capacitor

0.5 fA

0.05 fA

0.005 fA

3. Due to electrometer

75.4 fA

13.6 fA

3.62 fA

4. Due to measurement repeatability

2.14 fA

0.9 fA

0.1 fA

Combined uncertainty

76.1 fA

13.6 fA

3.75 fA

Expanded uncertainty (k = 1.96)

149 fA

26.7 fA

7.36 fA

The original article has been updated accordingly.

Copyright information

© Metrology Society of India 2017

Authors and Affiliations

  • Bushra Ehtesham
    • 1
  • Poonam Sethi Bist
    • 1
  • Thomas John
    • 1
  1. 1.LF HF Impedance and DC Standards, ALSIMCSIR-National Physical LaboratoryNew DelhiIndia

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