Service manual

Test Accuracy
Ratio (TAR)
Calculations
For the Agilent E1326B multimeter Test Accuracy Ratio (TAR) =
[High Limit - Input Value]/Measurement Uncertainty where the source
input
value is in DCV, ACV, or Ohms.
Example: Calculate DCV Test Accuracy Ratio
For a 7.0 DCV measurement if the High Limit value = 7.000750 DCV
and the Measurement Uncertainty = .0000115 DCV, Test Accuracy
Ratio (TAR) = (7.000750 V - 7.0000000 V)/.0000115 V = 65:1
(rounded to the nearest integer value). Since this value is >10:1, the
entry in Table 4-1 is " >10:1".
A-6 Calculating Multimeter Accuracy