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Model 2790 SourceMeter Switch System Reference Manual
Ohms temperature coefficient
TC % of reading = (0.001 + 0.025/ISOURCE) % / °C
TC ohms offset = (0.001/ISOURCE) Ω / °C
where: I
Example – Determine temperature coefficient for an I-source setting of 30mA:
% of reading
Ohms offset
Ohms temperature coefficient (30mA) = (0.00183% + 0.033mΩ) / ºC
7751/7753 V-source
Ohms accuracy
High ohms specifications using the V-source of the 7751/7753 are provided in the specifica-
tions for the 500V and 50V settings. Use the graphs in
Figure A-2
is the current output setting in mA
SOURCE
= (0.001 + 0.025/30) % / °C
= (0.001 + 0.00083) %
= 0.00183% / °C
= (0.001/30) Ω / °C
= 0.033mΩ / °C
(7753) for other V-source settings.
Specifications
Figure A-1
(7751) and
A-9
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