Contents
- Intro
- Disclaimer
- Manuals
- Design and construction
- Restoration
- Temperature coefficient performance
- Temperature coefficient results with oven
- Comparison with Fluke 732B
- Summary & Conclusion
Intro
In this article legacy, but still very good Fluke 732A DC Voltage standard will be serviced and tested. We have multiple units so inter-comparisons will be performed to obtain relative drift rate.
Disclaimer
Redistribution and use of this article 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:
- Redistributions of article must retain the above copyright notice, this list of conditions, link to this page (https://xdevs.com/fix/f732a/) and the following disclaimer.
- Redistributions of files in binary form must reproduce the above copyright notice, this list of conditions, link to this page (https://xdevs.com/fix/f732a/), and the following disclaimer in the documentation and/or other materials provided with the distribution, for example Readme file.
All information posted here is hosted just for education purposes and provided AS IS. In no event shall the author, xDevs.com site, or Fluke or any other 3rd party be liable for any special, direct, indirect, or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortuous action, arising out of or in connection with the use or performance of information published here.
If you willing to contribute or have interesting documentation to share regarding pressure measurements or metrology and electronics in general, you can do so by following these simple instructions.
Manuals and service information
Fluke 732A DC voltage standard system instruction manual
Fluke 732B/734A DC voltage standard instruction manual
Fluke 7001 series DC voltage standard system instruction manual
Comparison for known specifications of production resistance standards:
| Specification | Fluke 732A | Fluke 732B | Fluke 734A | Datron 4910 | Fluke 5720A calibrator |
|---|---|---|---|---|---|
| Output voltage, DC | 1V, 1.018V, 10V | 1.018V, 10V | 4 × 1.018V, 10V | 4 × 1.018V, 10V | up to 1100V |
| Accuracy (1y, 10V) | ±6 ppm | ±2 ppm | ±2 ppm | ±1 ppm | ±2 ppm |
| Accuracy (30 day, 10V) | ±0.5 ppm | ±2 ppm | ±2 ppm | ±1 ppm | ±2 ppm |
| Temperature coefficient, ppm | ±0.05 ppm/°C | ±3 ppm | ±1.5 ppm | <±0.1 ppm/°C | ±3 ppm max (18-28°C) |
| Adjustment range | 50µV, <0.05ppm | ||||
| Long term 1 year stability, ppm | ? , ? | ±8 ppm | ±4 ppm | ±0.5 ppm | ±2 ppm |
| Reference design solution | Motorola SZA263/LTFLU-1 | up to 4 x Linear LTZ1000ACH | 2 x LTFLU-1 | ||
| Max load current | 12 mA | 200 mA | 600 µA | 10 mA | 418 mA |
| Output noise | <1 µVRMS, 0.1-10Hz | ||||
| Construction type | Rugged half-rack module | Rugged ¼-rack module | Full-width 19” rack frame | Rugged half-rack module | Full-size rackmount |
| Active thermal compensation | Yes, +45° C oven assembly | Yes, multiple sections | |||
| Temperature sensor | Yes | ||||
| Operation range, ambient °C | +0…+40 | 0…+50 | |||
| Power requirements | 100,120,220,240VAC or 24-40VDC | Not required, passive device | |||
| Backup/offline power supply | Internal +24V Battery bank, 12 hours life | Not required, passive device | |||
| Dimensions, weight | 191 × 221 × 603 mm, 12.3kg | 254 × 206 × 311 mm, 4.8kg | 86 × 105 × 127 mm, 730g | ||
| MSRP | ~$2000 USD | $9000 USD | $37000+ USD | $9000+ USD | $30000+ USD |
Design and construction
Modified: Oct. 3, 2018, 11:45 a.m.