4 Calibration Procedures
68 Keysight 34970A/34972A Service Guide
Recommended Test Equipment
The test equipment recommended for the performance verification and
adjustment procedures is listed below. If the exact instrument is not available,
substitute calibration standards of equivalent accuracy.
A suggested alternate method would be to use the Keysight 3458A 8½digit
Digital Multimeter to measure less accurate yet stable sources. The output value
measured from the source can be entered into the instrument as the target
calibration value.
Application Recommended Equipment Accuracy Requirements
Zero Calibration
[a]
None 4 -terminal all copper short
DC Voltage
[a]
Fluke 5700A <1/5 instrument 24 hour spec
DC Current
[a]
Fluke 5700A/5725A <1/5 instrument 24 hour spec
Resistance
[a]
Fluke 5700A <1/5 instrument 24 hour spec
AC Voltage
[a]
Fluke 5700A/5725A <1/5 instrument 24 hour spec
AC Current
[a]
Fluke 5700A/5725A <1/5 instrument 24 hour spec
Frequency
[a]
Keysight 33220A <1/5 instrument 24 hour spec
Analog Output 34907A Keysight 34401A <1/5 instrument 24 hour spec
Thermocouple Reference Junction
34901A
34902A
34908A
Thermistor YSI 44031 (two)
[b]
J Type Calibrated Thermocouple Triple
Point Cell
±0.1 °C
Relay contact resistance
All switch modules
Keysight 34401A ±0.001W resolution
[a] In addition to the internal DMM, these applications require an input multiplexer module. The Keysight 34901A is recommended.
[b] Thermistor YSI 44031 is available as Keysight part number 34308A (package of five).