4 Fluke Calibration

734A DC Reference Standard

The 734A supports 1.018 V as well

In applications where saturated standard cells

are still used, the 1.018 V output of each 732B

Standard in the 734A Reference greatly simpli-

fies intercomparisons of cell banks. And, like the

10 V output, each 1.018 V output is completely

electrically and mechanically independent to

preserve the integrity of your reference. Unlike

standard cells, the 1.018 V output of the 732B

may be used immediately after shipment,

eliminating the need to let cells stabilize for an

extended period.

Supporting your traceability

requirements

Fluke Calibration provides the products and

services you need to manage your traceability

requirements. New 732Bs can be ordered with

or without calibration certificates. The standard

732B comes without any calibration certifi-

cate, with the intention of the owner providing

traceability as required locally. When delivery

of a new 732B with a calibration certificate is

required, then three alternatives are possible:

•

Calibration. The 732B/H is a 732B where

Fluke Calibration performs an output volt-

age calibration on your new standard. Before

shipment, your standard is compared to direct

voltage standards maintained at Fluke. Your

standard, shipped under power, includes a

Report of Calibration showing the deviation

from nominal and the uncertainty of the cali-

bration. This certificate is traceable to NIST via

Fluke’s Josephson Array, an intrinsic standard

of voltage.

•

Calibration and drift characterization. The

732B/C is similar to the 732B/H, but it adds

drift rate characterization before shipment.

The output voltage is compared to a Fluke

standard for 90 days. Once the drift rate is

known, total uncertainty as a function of

time is greatly reduced. The projected output

voltage is tabulated for 12 months following

calibration. Uncertainty of the projection varies

linearly, from + 0.5 ppm at the time of calibra-

tion to + 1.5 ppm after 12 months.

•

Accredited calibration. Normally, the 732B

calibration certificates are traceable to NIST

but are not considered accredited calibrations.

For an extra charge, an accredited calibra-

tion certificate is available. Contact your Fluke

Calibration representative for details.

Both the 732B/H and 732B/C require that the

standard is shipped to you under power. This

continuous power on condition is required

during shipment through delivery to your lab

for the calibration to remain valid. If continuous

power is not maintained, then the validity of

the calibration certificate may be compromised.

Contact your Fluke Calibration representative to

determine if the 732B/H or 732B/C alternatives

are available in your area.

The Fluke Calibration 732B Standard uses the same specially selected

zener reference technology pioneered in the popular 732A.

732B Standards are small, light and rugged.

Their 72-hour battery life, which can be

extended to 130 hours with the optional

external battery and charger, make them ideal

for transfer standards.