Calibrator
Calibration Verification of the Product
31
38. Input the value of the 742A-10k resistor into the Transfer Resistor column steps 23 and 24 of
Table 10 in
Ω.
39. Starting with step 23, output the resistance value from the Product.
40. Measure the voltage across the SENSE terminals with the 8588A and record in the DMM
Measurement on Transfer Resistor column of Table 10 in V.
41. Move the connection to the Product SENSE terminals and measure the voltage across the SENSE
terminals with the 8588A and record in the DMM Measurement on Product column of Table 10 in V.
42. Output the resistance value for step 24 from the Product.
43. Measure the product SENSE terminals voltage across the SENSE terminals with the 8588A and
record in the DMMPROD column of Table 10 in V.
44. Return the connection as in Figure 16.
45. Measure the voltage across the 742A-10k SENSE terminals with the 8588A and record in step 24
in the DMMSTD column of Table 10 in V.
46. Calculate the Product Output as follows:
For steps 1 through 14:
Product Output = DMM
PROD
For steps 15 through 22: Product Output = DMM
PROD
- (DMM
STD
-R
STD
)
For steps 23 through 26: Product Output = DMM
PROD
* (1 - DMM
Err
*10
-6
)
For steps 27 through 28:
47. With the entire table populated, evaluate each step for compliance to limits. If Guardbanding is to
be applied, create a table from the example in this manual, where the acceptance limits are
properly modified by your Guardbanding method.
Table 10. Calibration Steps for Resistance
Step
Product
Range
Product
Output
DMM Mode/
Method
Transfer
Resistor
Transfer
Value
DMM
Measure-
ment on
Transfer
Resistor
DMM
Measure-
ment on
Product
Calculated
Product
Output
Limits
1
12
Ω 0 Ω
Normal 10 Ω /
Direct
N/A N/A N/A
ΩΩ±1.0 mΩ
2
12
Ω 1 Ω
Normal 10 Ω /
Direct
N/A N/A N/A
ΩΩ±1.0 mΩ
3
12
Ω 10 Ω
Normal 10 Ω /
Direct
N/A N/A N/A
ΩΩ±1.2 mΩ
4
120
Ω 12.1 Ω
Normal 10 Ω /
Direct
N/A N/A N/A
ΩΩ±1.3 mΩ
5
120
Ω 100 Ω
Normal 100 Ω /
Direct
N/A N/A N/A
ΩΩ±3.2 mΩ
6
1.2 k
Ω 0.121 kΩ
Normal 100 Ω /
Direct
N/A N/A N/A
k
Ω kΩ ±4.7 mΩ
Product Output = R
STD
* DMM
PROD
DMM
STD
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