3 Fluke Calibration

734A DC Reference Standard

Why should you prefer the 734A?

•

Independence. The 734A is the only standard

of its type offering complete mechanical and

electrical independence of each of its four

standards.

•

Portability. Each 732B Standard is designed

for portability. Each is small, light, rugged and

has a long operating battery life.

•

Confidence. The 732B is based on the proven

technology of the Fluke Calibration 732A.

The 732A was the first standards lab quality

electronic reference to gain wide acceptance

as a replacement for saturated standard cells.

Originally designed for internal transfers of

Fluke’s corporate volt to the production floor,

thousands are now in service worldwide in a

variety of applications—from maintaining an

institutional reference to transferring values

from national labs or privately-operated 10 V

Josephson Arrays.

The 732B’s reference amplifier and resistors

are identical to those used in the 732A. But the

package is now half the weight, 75 % smaller,

more rugged and offers greatly extended battery

life. The rack-width enclosure provides a con-

venient way to store cells in your lab. And the

internal battery is now a common, off-the-shelf

model that can be purchased from a wide range

of electronic components suppliers, simplifying

your support. Or you can use your own battery,

connecting it to the 12 V to 15 V dc input on

each 732B.

The advantages to maintaining your

reference at 10 V

The primary benefits of maintaining your voltage

reference at 10 V rather than 1.018 V center on

efficiency and ease-of-use. At 10 V, you can

intercompare standards directly with a digital

voltmeter. The effects of noise and thermal EMFs

are diminished by a factor of 10 compared to

standard cells. And with 10 V Josephson Arrays

becoming more common, working at the 10 V

level further simplifies the process of estab-

lishing traceability. Finally, most modern dc

instrumentation today requires a 10 V standard

for calibration. When you ratio up to 10 V from

1.018 V, you lose considerable performance.

The 734A Reference and 732B Standards are a practical way to maintain and disseminate your volt and to support artifact calibration of instruments like the

5700A and 5720A Calibrators.