As a part of xDevs.com support for metrology experiments comparison of the 10 V and 7 V voltage reference standards of the xDevs US Lab and hobby CA lab was carried out from September 2020 to December 2020. xDevs.com US Lab is pilot lab in this comparison. One Zener diode-based travelling standard were transported by FedEx 2-day air freight between the labs. The reference standard for DC voltage is 7V unbuffered module, providing 7 V level by means of a LTZ1000A-based circuit, manufactured by Hewlett Packard as module for 3458A DMM module A9. The thermal voltage EMF was measured by direct comparison with the lab commercial and process standards. At the CA Lab, the travelling standard were calibrated at 7 V output before and after the measurements at xDevs US Lab, using Keysight 3458A 8½-digit voltmeter. Results of all measurements were NOT corrected for the dependence of the output voltages on internal temperature and ambient pressure. h2. Initial results for first comparisons at CA Lab p(pdf_link). "-Transfer DCV, OCT.4.2020, F732B to 3458A-A9 module, GUARD TO LO, *VOID*-":/doc/xDevs.com/FF/FFXFER_TEST1_732B_to_A9_OCT_4_2020.pdf p(pdf_link). "Transfer DCV, OCT.4.2020, F732B to 3458A-A9 module, GUARD FLOAT":/doc/xDevs.com/FF/FFXFER_TEST2_732B_to_A9_OCT_4_2020.pdf p(pdf_link). "Transfer DCV, OCT.4.2020, F732B to F732A, GUARD FLOAT":/doc/xDevs.com/FF/FFXFER_TEST1_732B_to_732A_OCT_4_2020.pdf p(pdf_link). "-Transfer DCV, OCT.4.2020, F732A to 3458A-A9 module, GUARD FLOAT, *VOID*-":/doc/xDevs.com/FF/FFXFER_TEST3_732A_to_A9_OCT_4_2020.pdf p(pdf_link). "Transfer DCV, OCT.4.2020, F732B to Datron 4708 10V output, GUARD FLOAT":/doc/xDevs.com/FF/FFXFER_TEST3_732B_to_4708_10VDC_OCT_4_2020.pdf p(pdf_link). "Transfer DCV, OCT.4.2020, 3458A-A9 to Datron 4708 10V output, GUARD FLOAT":/doc/xDevs.com/FF/FFXFER_TEST3_A9_to_4708_10VDC_OCT_4_2020.pdf h2. Process calibration results for second comparison at xDevs US Lab h2. Second set of results for third comparisons at CA Lab h2. Final results and summary Excel file with transfer experiment plot "!/doc/xDevs.com/FF/xfer_oct2020.png!":/doc/xDevs.com/FF/ff_lab_oct2020_xfers.xlsx