Fluke Calibration 5730A, Operator'S Manual, Page: 26 / 260

5730A
Operators Manual
1-12
732B Direct Voltage Reference Standard
The Fluke Calibration 732B is a rugged, easily transported solid state direct voltage
reference standard with a highly predictable 10 V output. The 732B can be short-
circuited, even for extended periods of time, without damage or loss of stability. It
maintains full specified stability over a temperature span of 18
°
C to 28
°
C.
The 5730A Calibrator uses a 10 V reference standard such as the Fluke Calibration 732B
in its semi-automated calibration procedure to establish external voltage traceability.
Chapter 7 describes this procedure.
732B-200 Direct Volt Maintenance Program (USA Only)
The Fluke Calibration 732B-200 Direct Volt Maintenance Program provides laboratories
with NIST-traceable 10 V calibration uncertainty as low as 0.6 parts per million (ppm).
The program maintains the 732B that is kept in the laboratory. To do this:
1. Fluke Calibration sends a calibrated Fluke Calibration-owned 732B standard,
together with all-necessary connection cables and instructions for comparison with a
customer 10 V reference standard.
2. The customer takes a series of readings over five days, and returns the results to the
Fluke Calibration Standards Laboratory.
3. The Fluke Calibration Standards Laboratory assigns a value to the customer 10 V
standard relative to the NIST legal volt and sends a report of calibration.
742A Series Resistance Standards
The 5730A Calibrator uses 1
Ω
and 10 k
Ω
resistor standards such as the 742A Series in
its semi-automated calibration procedure to establish external traceability of resistance
and current. Chapter 7 describes this procedure.
The 742A Resistance Standards are constructed of arrays of Fluke Calibration wirewound
precision resistors and are ideally suited as support standards for the Calibrator. Stability
of the resistance transfer standards and their temperature coefficients make them ideal for
easy transport to the Calibrator work environment.
Wideband AC Module (Option 5700A-03) Calibration Support
The Wideband AC Module (Option 5700A-03) requires two kinds of calibration: gain
and flatness. Gain constants are checked and recalibrated as part of the normal 5730A
Calibrator semi-automated calibration process.
Since frequency flatness is determined by such stable parameters as circuit geometry and
dielectric constants, flatness of the Wideband AC Module has excellent long-term
stability. This stability gives the Wideband AC Module a two-year calibration cycle for
flatness calibration. Flatness calibration is required only infrequently, and can be done
when the Calibrator is returned to a standards laboratory for periodic verification.
Chapter 7 of this manual contains the wideband gain and flatness calibration procedures.