User manual

1 Calibration Procedures
Recommended Test Equipment
4 U1271A/U1272A Service Guide
Recommended Test Equipment
The test equipment recommended for the performance
verification and adjustment procedures is listed below in
Table 1- 1. If the exact instrument is not available, substitute
with another calibration standard of equivalent accuracy.
Table 1 - 1 Recommended test equipment
Application
Recommended
equipment
Recommended accuracy requirements
DC voltage Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
DC current Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
Resistance Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
AC voltage Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
AC current Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
Frequency Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
Capacitance Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
Duty cycle Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
Diode Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
Temperature Fluke 5520A
<20% of the U1271A/U1272A accuracy
specification
Short
Shorting plug — a dual banana plug with a copper wire
shorting the two terminals