Contents
- Intro
- Disclaimer
- Exterior and connections, S/N 36149
- Teardown of unit S/N 324XX
- Calibration test for S/N 36272
- Temperature stability
- Frequency flatness comparisons
- Summary & Conclusion
Intro
This is stub for Wavetek 4953 Shunt. This shunt is designed and sold in bundle with Wavetek 4950 Multi-function Transfer Calibrator.
| xDevs.com | Wavetek 4953 | Fluke A40B-10A | Units |
| Nominal shunt current | 0 to 11 | 0 – 10 | A |
| Nominal DC resistance | 0.01 | 0.08 | Ω |
| Input / output connector | 5-way binding posts | N female connector | |
| Frequency range | DC, 10 – 20k | DC, 10 – 100k | Hz |
| Short-term stability, ±1 °C | ± 20 | ± 26 | ppm of FS |
| Temperature coefficient | 10 | 10 | ± ppm/°C |
| AC Flatness Low band | 200 ppm, 10 Hz – 1 kHz | 26 to 37 ppm, 10 Hz – 1 kHz | |
| AC Flatness Hi band | 300 ppm 5kHz, 600 ppm 10 kHz, 1000 ppm, 20 kHz | 60 ppm 10kHz, 92 ppm 100 kHz | |
| Temperature coefficient, AC | 40 ppm Low band, up to 120 ppm Hi band | 4.5 ppm |
Table 1: Specification of the Wavetek 4953
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/article/w4953/) 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/article/w4953/), 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 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.
Exterior and connections, S/N 36149
Image 1-2. Wavetek 4953 AC/DC 10A shunt facepanel
Image 3. Original labels on the bottom of the shunt
Image 1-2. Owner’s calibration results
Teardown of unit S/N 324XX
This unit was evaluated some years back and found to be functional.
Also rare chance presented to look inside of the shunt for internal construction review.
Pretty large shunt element was placed between two dielectric plates. Wiring to the current input ports is done with heavy braid to lower inductance and AC errors from the connection.
Output is routed to output therminals with two short wires soldered to tab rings. Joints at the shunt secured with brown epoxy for mechanical stability.
Shunt element marked as 408941-1 with date code 14th week 1996.
Calibration test, S/N 36272
To perform actual performance test on this model shunt we used yet another sample, S/N 36272 from a friendly lab here in USA.
Top looks exactly like the other two, no surprises here.
To maintain any history and repeatability of results no disassembly or any intrusive operations were done to this shunt. Connectors were cleaned with 99% isopropyl alcohol and light brushing with paper prior to measurements.
This datatable provides calibration result solely for performance evaluation and educational purposes.
It is important to note that these measurements are not accredited documentation and therefore cannot be used as such.
For ANSI Z540-1 or ISO 17025 accredited calibration, please contact your preferred commercial calibration facility or instrument manufacturer.
| Model and serial | Calibration date | Test current | Assigned value | Uncertainty | Measured deviation | Notes |
|---|---|---|---|---|---|---|
| W4953 36272 | 27.OCT.2023 by xDevs | 0.245 A DC | 0.010008608 Ω | ± 1.2 µΩ/Ω | REFERENCE | 10 hours, 6010B DCC vs MPx-0R1 |
| W4953 36272 | 29.OCT.2023 by xDevs | 0.245 A DC | 0.010008573 Ω | ± 2.5 µΩ/Ω | -3.5 µΩ/Ω | 10 hours, Fluke 5720A + HPAK 34420A |
| W4953 36272 | 30.OCT.2023 by xDevs | 0.500 A DC | 0.010008606 Ω | ± 3 µΩ/Ω | -0.2 µΩ/Ω | 24 hours, Fluke 5720A + HPAK 34420A |
| W4953 36272 | 30.OCT.2023 by xDevs | 1.0 A DC | 0.010008620 Ω | ± 4 µΩ/Ω | +1.2 µΩ/Ω | 24 hours, Fluke 5720A + HPAK 34420A |
| W4953 36272 | 1.NOV.2023 by xDevs | 2.0 A DC | 0.010008697 Ω | ± 6 µΩ/Ω | +8.9 µΩ/Ω | 24 hours, Fluke 5720A + HPAK 34420A |
| W4953 36272 | 3.NOV.2023 by xDevs | 4.0 A DC | 0.010008980 Ω | ± 6 µΩ/Ω | +37 µΩ/Ω | 24 hours, Fluke 5720A + HPAK 34420A |
| W4953 36272 | 5.NOV.2023 by xDevs | 6.0 A DC | 0.010009052 Ω | ± 8 µΩ/Ω | +44 µΩ/Ω | 24 hours, Fluke 5720A + HPAK 34420A |
| W4953 36272 | 7.NOV.2023 by xDevs | 8.0 A DC | 0.010009117 Ω | ± 8 µΩ/Ω | +51 µΩ/Ω | 24 hours, Fluke 5720A + HPAK 34420A |
| W4953 36272 | 8.NOV.2023 by xDevs | 10.0 A DC | 0.010009226 Ω | ± 8 µΩ/Ω | +62 µΩ/Ω | 24 hours, Fluke 5720A + HPAK 34420A |
| W4953 36272 | 8.NOV.2023 by xDevs | 2.0 A DC/AC 1kHz | 0.010011435 Ω | ± 1900 µΩ/Ω | +274 µΩ/Ω AC/DC | 6 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 8.NOV.2023 by xDevs | 4.0 A DC/AC 1kHz | 0.010012433 Ω | ± 1580 µΩ/Ω | +345 µΩ/Ω AC/DC | 4 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 8.NOV.2023 by xDevs | 6.0 A DC/AC 1kHz | 0.010012512 Ω | ± 990 µΩ/Ω | +346 µΩ/Ω AC/DC | 4 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 10.NOV.2023 by xDevs | 10.0 A DC/AC 10 Hz | 0.010009381 Ω | ± 920 µΩ/Ω | +16 µΩ/Ω AC/DC | 8 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 8.NOV.2023 by xDevs | 10.0 A DC/AC 40 Hz | 0.010009422 Ω | ± 700 µΩ/Ω | +20 µΩ/Ω AC/DC | 8 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 9.NOV.2023 by xDevs | 10.0 A DC/AC 60 Hz | 0.010009456 Ω | ± 700 µΩ/Ω | +23 µΩ/Ω AC/DC | 8 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 10.NOV.2023 by xDevs | 10.0 A DC/AC 100 Hz | 0.010009470 Ω | ± 700 µΩ/Ω | +24 µΩ/Ω AC/DC | 8 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 9.NOV.2023 by xDevs | 10.0 A DC/AC 300 Hz | 0.010010176 Ω | ± 700 µΩ/Ω | +94 µΩ/Ω AC/DC | 8 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 8.NOV.2023 by xDevs | 10.0 A DC/AC 1 kHz | 0.010012817 Ω | ± 700 µΩ/Ω | +359 µΩ/Ω AC/DC | 8 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 10.NOV.2023 by xDevs | 10.0 A DC/AC 5 kHz | 0.010022438 Ω | ± 1190 µΩ/Ω | +1320 µΩ/Ω AC/DC | 10 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
| W4953 36272 | 11.NOV.2023 by xDevs | 10.0 A DC/AC 10 kHz | 0.010036484 Ω | ± 2460 µΩ/Ω | +2724 µΩ/Ω AC/DC | 13 hours, Fluke 5720A + Fluke 5790A, INPUT2 HiZ |
Summary & Conclusion
In this article we looked at the design of 10A AC/DC shunt from Datron/Wavetek. These shunts were sold as accessory for various Wavetek meters and instruments such as Model 1281, 4920, 4950 and used for AC and DC current metrology uses. Model 4953 are useful for measurements at 10A and smaller currents and can be used to improve uncertainties of calibrators and sources.
Real-time discussion about this article and related stuff is very welcome at our own xDevs.com IRC-chat server: xdevs.com (standard port 6010, channel: #xDevs.com).
Modified: Oct. 2, 2024, 6:29 p.m.