Section 2: Performance verification
DAQ6510 Data Acquisition and Multimeter System Calibration and Adjustment Manual
2-4
DAQ6510-905-01 Rev. D June 2022
Calibration verification limits
The calibration verification limits stated in this section have been calculated using only the DAQ6510
one-year accuracy specifications and ambient temperature ±5 °C from T
CAL
(the temperature at which
the instrument was calibrated). They do not include test equipment uncertainty. If a particular
measurement falls outside the allowable range, recalculate new limits based on both the DAQ6510
specifications and corresponding test equipment specifications.
Specifications and characteristics are subject to change without notice; please refer to
for the most recent specifications.
Example reading limit calculation
Assume you are testing the 10 V dc range using a 10 V input value. Using the DAQ6510 one-year
accuracy specification for 10 V dc of ± (25 ppm of r 5 ppm of range), the calculated limits are:
•
Reading limits = 10 V ± [(10 V × 25 ppm) + (10 V × 5 ppm)]
•
Reading limits = 10 V ± (0.00025 + 0.00005) V
•
Reading limits = 10 V ± 0.00030 V
•
Reading limits = 9.99970 V to 10.00030 V
Calculating resistance reading limits
Resistance reading limits must be recalculated based on the actual calibration resistance values
supplied by the equipment manufacturer. Calculations are performed in the same manner as shown
in the preceding example. Use the actual calibration resistance values instead of the nominal values
in the example when performing your calculations.
For example, assume that you are testing the 10
kΩ range using an actual 10.03
kΩ calibration
resistance value. Using DAQ6510 one-year 10
kΩ range accuracy of ± (75
ppm of r 6 ppm of
range), the calculated reading limits are:
•
Reading limits = 10.03
kΩ
± [(10.03
kΩ x 75
ppm) + (10
kΩ x 6
ppm)]
•
Reading limits = 10.03
kΩ ± [(0.7523) + (0.06)] Ω
•
Reading limits = 10.03
kΩ ± 0.8123 Ω
•
Reading limits = 10.029188
kΩ to 10.030812
kΩ