{"id":14192,"date":"2025-02-25T22:08:19","date_gmt":"2025-02-25T14:08:19","guid":{"rendered":"https:\/\/www.wbyq.cn\/product\/14192.html"},"modified":"2025-02-28T09:24:43","modified_gmt":"2025-02-28T01:24:43","slug":"%e5%a4%8d%e5%88%b6-18","status":"publish","type":"product","link":"https:\/\/ad.wbyq.cn\/en\/product\/14192.html","title":{"rendered":"732C and 734C DC Voltage Reference Standards"},"content":{"rendered":"

Product Overview: 732C and 734C DC Voltage Reference Standards<\/h2>\n
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Accurate, stable 10 V reference in your lab<\/h2>\n

With the 734C, establishing and maintaining the primary voltage standardizer in your laboratory is simple. Over time, you can reduce the uncertainty of the 734C by a factor of three by making frequent comparisons of the four units and by performing periodic calibrations of one or more of the units.<\/p>\n

From 1984 until the acquisition of our Josephson Array, Fluke Calibration's primary standards laboratory maintained its corporate voltages in such a way as to reduce absolute uncertainty to \u00b1 0.35 \u00b5V\/V, traceable to national standards.<\/p>\n

734C Supports 1 V and 0.1 V<\/h2>\n

1 V and 0.1 V are the primary calibration\/verification points for digital multimeters. Thanks to a network of high-precision thin-film resistors (manufactured in Fluke's own thin-film factory facility), the 734C now comes standard with these two additional outputs. No external separator is required, making measurement setup easier and less likely to go wrong.<\/p>\n

Selected models for demanding applications<\/h2>\n

Fluke Calibration offers select models for customers who need primary standards lab capabilities to calibrate demanding workloads and to independently send standards to other labs for calibration. The calibration process is the same for the Basic and Select models. The only exception is that the Select models (732C\/S\/C or 734C\/S\/04) are compared to the Fluke Calibration J-array for 180 days of drift characterization data and provide up to twice the stability at 10 V. This process ensures that the standard selected meets the stringent drift requirements of the standard lab. This process ensures that the best possible standard is selected to meet the stringent drift performance requirements.<\/p>\n

Supporting your traceability requirements<\/h2>\n

Fluke Calibration provides the products and services you need to manage your traceability requirements Fluke Calibration performs an output voltage calibration on a new 732C by comparing the new 732C to its own factory maintained J-array. The base model 732C is shipped cold (\"unpowered\") and is accompanied by a Certificate of Failure to Calibrate attesting to its operability. The owner is responsible for providing traceability to local requirements.<\/p>\n

The 732C unit with approved calibration and drift characteristic data is shipped \"hot\" (energized) when ordered. During manufacture, each 732C is compared to a Fluke Calibration direct voltage standard for at least 90 days to obtain drift characteristic data. Once the drift rate is known, the projected output voltage for December is determined. The unit is then shipped under power. The continuous power condition needs to remain active from the time of shipment until delivery to the laboratory. If continuous power cannot be maintained, the validity of the calibration may be significantly reduced. Contact your Fluke Calibration representative to determine if a 732C Replacement is available in your area.<\/p>\n

Why use a four-device reference?<\/h2>\n

The Four Unit Voltage Reference Standard is great for any situation where you need to maintain and pass on a reference voltage. At least three units are compared to each other in order to detect and recognize variations in the output of any one unit. The fourth unit may be used as a backup or for delivering voltage to and from a remote location. When it is returned to the laboratory, it may be compared to the other three units in order to determine whether its output has drifted during transportation.<\/p>\n

But a four-device reference is not just that simple. According to NBS Technical Note 1239, published by the National Bureau of Standards (now NIST) in 1987, four to six references are required to provide measurement integrity and redundancy, as well as to minimize the number of measurements required. The references must be completely independent of each other. Otherwise, common elements such as power supplies or ovens may affect the correlation of the reference outputs. In addition, by utilizing frequent intercomparisons of the four units, you can detect at what point any one unit begins to drift out of specification or needs to be repaired.<\/p>\n

Each 732C is a self-contained DC standard with its own power supply, oven, auxiliary electronics and packaging. Each unit can be purchased individually or as a complete 734C system, which consists of four 732Cs that slide into a rack-width enclosure.<\/p>\n

Why should you choose the 732C or 734C?<\/h2>\n