PowerTek 9010, Руководство пользователя

Страница: 51 / 75

Once range level of the tree structure is reached, calibration points are displayed in following format:
Upper part shows selected function and range on the left, selected calibration point on the left and remote
control command used to access this specific point in tooltip bar on top. Lower part of the display shows:
- Nominal value
- Requested accuracy of used calibration standard
- Last calibration date of this point
- Calibration value (only this can be modified)
History of each calibration point can be recalled using History softkey. History shows all previously
saved values in a table, including date and relative drift from the first value ever recorded.
Two different approaches to calibration value adjustment are applied in 9010:
- Values denoted in % or without any unit (mostly used in source functions with continuous ranges
like V
dc
function in fig. 42 above) show relative position within selected range. Such points can be
adjusted by changing the value so that the standard readout gets as close to nominal value as
possible.
- Values with other units (mostly used in meter functions or fixed source standards) can be calibrated
indirectly by typing in meter readout. Figure 43 below shows an example of 100Ω point of fixed
resistance function which has been adjusted by measuring resistance on output terminals with
standard meter and typing in the standard readout (99.9955 Ω)
Powertek MC9010 User Manual