सधनुर्ग्रहः पौतवविवीतमानम् ॥ कZ_०२.२०.१३ ॥
sadhanurgrahaḥ pautavavivītamānam
The sadhanugraha is the officially verified (vivīta) measure under the department of weights and measures (pautava).
That instruments/standards are tested, sealed, or otherwise approved so field officials cannot substitute manipulated measures.