Keithley DMM7510 Calibration Manual

Section
2: Performance verification Model DMM7510 7½ Digit Graphical Sampling Multimeter
Calibration Manual
2-8 DMM7510-905-01 Rev. A / April 2015
Verification limits
The verification limits stated in this section have been calculated using only the Model DMM7510
one-year accuracy specifications, within 30 days of auto calibration and T
oper
±5 °C from T
acal
. They do
not include test equipment uncertainty. If a particular measurement falls outside the allowable range,
recalculate new limits based on both the Model DMM7510 specifications and corresponding test
equipment specifications. The Customer Calibration Data Report does not include zero verification or
analog trigger tests.
Specifications and characteristics are subject to change without notice; please refer to the
Keithley
website (http://www.keithley.com) for the most recent specifications.
Example reading limit calculation
Assume you are testing the 10 VDC range using a 10 V input value. Using the Model DMM7510
one-year accuracy specification for 10 VDC of ± (14 ppm of reading + 1.2 ppm of range), the
calculated limits are:
Reading limits = 10 V ± [(10 V × 14 ppm) + (10 V × 1.2 ppm)]
Reading limits = 10 V ± (0.00014 + 0.000012) V
Reading limits = 10 V ± 0.000152 V
Reading limits = 9.999848 V to 10.000152 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 Model DMM7510 one-year 10 kΩ range accuracy of ± (30 ppm of reading +
3 ppm of range), the calculated reading limits are:
Reading limits = 10.03 kΩ ± [(10.03 kΩ x 30 ppm) + (10 kΩ x 3 ppm)]
Reading limits = 10.03 kΩ ± [(0.3009) + (0.03)] Ω
Reading limits = 10.03 kΩ ± 0.3309 Ω
Reading limits = 10.029669 kΩ to 10.030331 kΩ

Keithley DMM7510 Specifications

General

Brand	Keithley
Model	DMM7510
Category	Multimeter
Language	English