A. Kelvin-Varley. Voltage Divider. Instruction Manual. P/N mm (8) In the event of failure of a product covered by this warranty, John Fluke Mfg. Co., . The Fluke A Kelvin-Varley Voltage Divider generates V and 11W of power. A models provide an absolute linearity of ppm, a temperature. Find great deals for Fluke A Kelvin Varley Voltage Divider Shop with confidence on eBay!.

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Showing Results for Fluke 720A

Output terminals are on most right corner. Well, our quest with Decade A does flyke end so quick with only bad wiring, as even after reassembly of wiring properly, divider does circuit does not work as expected.

This reveals that all decade A resistors are wired incorrectly by one position counter-clockwise from switch rear view. Fluke A Instruction manual Fluke A schematics Instruction manual provide use, calibration and servicing information for the unit.

Close-up on exterior controls and ports. Maximum voltage and current limits are indicated as well. Incorrect wiring on decade switch.

A Kelvin-Varley Divider

It has a 1. And as expected, after decade switch replacement unit came back to life. Plastic shafts used to rotate decade switches were replaced as 720.


Schematic section of Decade A network. Maybe except screw or two… Internal switch for calibration for third decade. The main switches are sealed.

720A Kelvin-Varley Divider

It is a highly accurate, stable, and linear primary ratio standard suitable for use in many applications requiring known voltage or current ratios. That reveals 40 year age of this instrument. Instruction manual provide use, calibration and servicing information for the unit.

Gold also allows the use with low level signals. 72a0 A page AN High quality gold plated tellurium-copper fpuke posts serve to minimize the thermal emf effects which would artificially reflect a change in dc resistance measurements.

Later decades only fine-tune resistance of primary resistors in decade A. Markings on rotary switch and resistors If reading correct, date-code on on decade A switch is 6th weekand resistors on A trimmer board are 37th week Redistribution and use of this flukd or any images or files referenced in it, in source and binary forms, with or without modification, are permitted provided that the following conditions are met:.

Little board with beautiful Fluke-made teal resistors mounted just above the oil tank from the top side. Sticker on the unit. The single turn pots are wire wound, manufactured by CTS.


Also connection to input and output binding posts has got my attention, as soldering does not look very good. Function switch have many long rotary sections.

Oil-filled main decade A fill port Here comes first trap for young metrologists and precision nuts. Placing all resistors inside same oil-filled container does not make them more stable or precise, but instead equalize resistor temperatures even with different power dissipation of resistor network.

Fluke A used or new for sale at used-line

If you would like to support us by making a donation please click the Paypal button: Our unit still have old-style Fluke logo, bit yellowed switches and of course dirty connectors: This instrument will be used in xDevs. Wiring harness, all fixed in place. Fluke A front and rear features. Temperature coefficient of linearity is 0.

The front panel is clearly labeled showing step size for each decade. All readers are welcome to leave your commends and feedback.