Contents
- Intro
- Disclaimer
- Manuals and documentation
- Unit 1 – 5700NAF complete box
- Unit 2 – 5700NAF parts mule restoration
- Component level repairs, parts lists, repair notes for obsolete items
Intro
Only at xDevs.com you can find articles, covering not just one expensive instrument but two in a row. Thanks to support from our members, here we will go thru restoration hurdles of two different Fluke 5700/NAF multifunction calibrators. Hopefully we will see these units, at different locations to be used in our international metrology experiments, transfers and long-term stability evaluation reports. 5700A is a known work horse of any serious calibration laboratory, but very rare sight in personal man’s cave labs due to high cost, even today after many years of obsolecense. Current MSRP for modern Fluke 5730A series even in vanilla option-less package is over $60000 USD. Once you add Wideband option, some Fluke low-thermal cable sets, transit case the price tag will shoot up to over $75000 USD, easily. And metrology-level calibration is not included in that price.
5700A Series II and later 5720A were 1994 refresh of original calibrator design, to improve reliability, noise performance on low mV ranges and stability. 5720A was a current model in production for few decades. Today 5720A is obsoleted and replaced by facelifted 5730A in 2016. However in this article, we will be looking at special military-grade version of Series I 5700A units.
Remember, buying broken or even listed “good” used 5700A below market price and fixing it likely will end up as very bad expensive exercise, when all hidden costs considered and accounted for. Cost of ownership of 5700A unit WITH proper repair, long-term verification and calibrations often easily exceed buying a fully tested and calibrated modern unit from reputable source/distributor. So even if you buy complete calibrator for $10K, you can be easily be rewarded with pile of unstable/non-fixable custom Fluke parts that would need thousands more and hundreds of hours to get even just working properly again, leave alone meeting very strict 5700A level specifications.
Disclaimer
Redistribution and use of this article, any parts of it 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:
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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, including Fluke 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 add your experience regarding instrument repairs or provide extra information, you can do so following these simple instructions
Manuals and documentation
Fluke does provide all main manuals, including service information for these older calibrators, right on the product page, without requirement of any registration or access requests, unlike Tektronix or Keysight web-sites. Thumbs up for Fluke, way to host the data on your product page, not hiding behind registration forms, “ask a consultant” or other big-dollar marketing obscurity.
Brochure: The 5700A/5720A MFC: Taking Accuracy to New Level
Fluke 5700A/5720A Series II Operator Guide, May 1996, Rev.1
Fluke 5700A/5720A Series II Operators Manual, May 1996, Rev.2
Fluke 5700A/5720A Series II Operators Manual Supplement, Feb 2008, Issue 5
Fluke 5700A/5720A Series II Operators Manual Supplement, Feb 2008, Issue 9
Fluke 5700A/5720A Series II Service Manual, Nov 2007 w/o schematics
Fluke 5700A/5720A Series II Service Manual Supplement, Issue 6
Fluke 5700A/5720A Series II Service Manual Supplement, Issue 9
Fluke 5700A/5720A Series II Getting started, March 2002, Rev.2
Fluke 5700A/5720A Series II Getting started Supplement, Issue 6
Fluke 5700A/5720A Series II Remote Programming Reference Guide
Fluke 5700A Instrument Security Procedures
Fluke 5720A Instrument Security Procedures
Fluke 5725A Instrument Security Procedures
Fluke 5725A Getting Started, April 2014
Fluke 5725A Getting Started Supplement, Issue 3
Fluke 5725A Instruction Manual, Jan 1989 Rev.7
Fluke 5725A Instruction Manual Supplement, Issue 4
Fluke 5725A Instruction manual
Tech data: 5700A->5720A Upgrade Service
Model 5440A-7002 Low Thermal Test Lead Set – Specification
Fluke 5700A, 5720A CE Declaration of Conformity
An evaluation of the 5700A Series II Artifact Calibration
Service notes
First goes the most important document for repairs/maintenance – 570-page service manual. Credits for hosting it freely going to KO4BB portal. We are lucky to also have schematics, list of parts, assembly drawings of the boards included in it!
Fluke 5700A MFC Service Manual with schematics, Rev.9,3/96, March 1996
Fluke 5700A Series II/5720A MFC Service Manual with schematics, Rev.1,3/02, June 1996
In this article we will repair and perform testing of two Fluke 5700A/NAF calibrators. These are purchased from online auction, so it will be interesting to see how much extra funding will it require to bring them back in service.
Unit 1 – 5700NAF complete box
This board came as “complete, but condition unknown”. For safety it’s best to assume that box is 100% bad and every board and module must be carefully inspected, tested and verified before assembly into live tests. This calibrator does come with Wideband output A5/A6 option, to provide 30MHz output at Type-N port.
Exterior
Chassis and internal parts review
A7 assembly
A8 assembly
A9 assembly
A10 assembly
A11 assembly
A12 assembly
A13 assembly
A14 assembly
A15 assembly
A16 assembly
A17 assembly
A18 assembly
A19 assembly
A20 assembly
Unit 2 – 5700NAF parts mule restoration
Exterior
This board came as “broken, non-working”, likely used as parts donor. For safety it’s best to assume that box is 100% bad and every board and module must be carefully inspected, tested and verified before assembly into live tests. This calibrator also come with Wideband output A5/A6 option, to provide 30MHz output at Type-N port.
Chassis and internal parts review
A3 board
A4 board
A8 board
A12 board
A13 board
Component level repairs, parts lists, repair notes for obsolete items
Here is initial BOM for Digikey order to get essential replacement/spare parts, that can be helpful for 5700A backup/repairs.
| Digikey P/N | Manufacturer P/N | Description | Qty | 5700A board |
|---|---|---|---|---|
| 1688-1357-ND | 9A0924S401 | FAN 92×25MM 24VDC TACH | 2 | Frame |
| 478-8990-1-ND | TAP476K035CRW | CAP TANT 47UF 10% 35V RADIAL | 6 | A2,A9,A10,A17,A20 |
| 478-11562-1-ND | TAP106M035SRW | CAP TANT 10UF 20% 35V RADIAL | 16 | A10,A12,A14,A15,A17 |
| 478-7382-1-ND | TAP475K035CRW | CAP TANT 4.7UF 10% 35V RADIAL | 30 | A6,A9,A12,A13 |
| 478-1898-ND | TAP337K006CCS | CAP TANT 330UF 10% 6.3V RADIAL | 2 | A12 |
| 478-4175-ND | TAP226K025CCS | CAP TANT 22UF 10% 25V RADIAL | 11 | A7,A13,A14,A15,A17 |
| 478-7372-1-ND | TAP225K035SRW | CAP TANT 2.2UF 10% 35V RADIAL | 4 | A11,A15 |
| 1189-3784-1-ND | 63YXF10MEFCTA5×11 | CAP ALUM 10UF 20% 63V RADIAL | 10 | A14 |
| 565-3449-ND | EGXL250ELL471MJ20S | CAP ALUM 470UF 20% 25V RADIAL | 4 | A14,A18 |
| 493-5178-1-ND | UPJ2W3R3MHD1TO | CAP ALUM 3.3UF 20% 450V RADIAL | 5 | A16,A18 |
| 732-9369-1-ND | 860130573001 | CAP ALUM 22 UF 20% 35 V | 10 | A16,A17,A18,A19 |
| 493-14664-1-ND | UBY1H102MHL1TN | CAP ALUM 1000UF 20% 50V RADIAL | 2 | A18 |
| 493-6802-ND | UHW1E222MHD6 | CAP ALUM 2200UF 20% 25V RADIAL | 2 | A18 |
| 565-4020-ND | EKYB101ELL331ML25S | CAP ALUM 330UF 20% 100V RADIAL | 5 | A18,A19 |
| 565-3931-ND | EKYB350ELL472MMN3S | CAP ALUM 4700UF 20% 35V RADIAL | 5 | |
| 565-3907-ND | EKYB250ELL682MMN3S | CAP ALUM 6800UF 20% 25V RADIAL | 5 | A18,A19 |
| 493-14871-ND | UBT1J101MPD | CAP ALUM 100UF 20% 63V RADIAL | 10 | |
| 338-2545-ND | 381LX332M050J022 | CAP ALUM 3300UF 20% 50V SNAP | 4 | A18 |
| 565-4817-ND | EKZE630ELL471ML20S | CAP ALUM 470UF 20% 63V RADIAL | 2 | A18 |
| 1189-4171-ND | 25ZLG220MEFC8×11.5 | CAP ALUM 220UF 20% 25V RADIAL | 1 | A18 |
| 565-1465-ND | EKXG401ELL470ML25S | CAP ALUM 47UF 20% 400V RADIAL | 4 | A18 |
| 493-2626-ND | LGU2C471MELZ | CAP ALUM 470UF 20% 160V SNAP | 1 | A19 |
| 338-2511-ND | 381LX103M025K022 | CAP ALUM 10000UF 20% 25V SNAP | 1 | A19 |
| 493-13233-1-ND | UBX2C100MPL1TD | CAP ALUM 10UF 20% 160V RADIAL | 1 | A19 |
| 493-8663-ND | LGY1H682MELC30 | CAP ALUM 6800UF 20% 50V SNAP | 4 | A18 |
| 1189-2894-ND | 50MXG10000MEFCSN35×30 | CAP ALUM 10000UF 20% 50V SNAP | 2 | A18 |
| 1189-3355-ND | 50MXG8200MEFCSN35×30 | CAP ALUM 8200UF 20% 50V SNAP | 2 | A19 |
| 338-4172-ND | SLP223M025H5P3 | CAP ALUM 22000UF 20% 25V SNAP | 1 | A19 |
| 338-3808-ND | SLPX223M016E3P3 | CAP ALUM 22000UF 20% 16V SNAP | 1 | A19 alternative |
| P15348CT-ND | EEU-FR1E101B | CAP ALUM 100UF 20% 25V RADIAL | 10 | A19 |
| P19551CT-ND | ECA-2AHG100B | CAP ALUM 10UF 20% 100V RADIAL | 35 | A11,A13,A14,A17,A18,A19 |
| 732-9345-1-ND | 860130473003 | CAP 47 UF 20% 25 V | 10 | |
| 732-9357-1-ND | 860130675005 | CAP 47 UF 20% 50 V | 8 | A7,A12 |
| 399-12626-ND | R79IC2220Z345J | CAP FILM 0.022UF 5% 250VDC RAD | 2 | A16 |
| 235-1278-ND | YQS5853PTF | PTC RESET FUSE 50V 170MA RADIAL | 2 | A18 |
| F3052-ND | V27ZA1P | VARISTOR 27V 250A DISC 7MM | 2 | A3,A4 |
| F10951-ND | V275LA10CP | VARISTOR 430V 3.5KA DISC 10MM | 1 | A4 |
| 1N4007-TPMSCT-ND | 1N4007-TP | Diode 1N4007 DO-41 | 10 | A8 |
| LT1007ACN8#PBF-ND | LT1007ACN8#PBF | IC OPAMP GP 8MHZ 8DIP | 4 | A12,A7 |
| DG211BDJ-E3-ND | DG211BDJ-E3 | IC SWITCH QUAD SPST 16DIP | 5 | A12 |
| DG444DJ-E3-ND | DG444DJ-E3 | IC SWITCH QUAD SPST 16DIP | 5 | A12 |
| BC4183CT-ND | MRS25000C4709FCT00 | RES 47 OHM 0.6W 1% AXIAL | 10 | A14,A16 |
| BC4530CT-ND | MBE04140C2203FC100 | RES 220K OHM 1% 1W AXIAL | 6 | A14,A16 |
| BC4461CT-ND | MBB02070C3001FCT00 | RES 3K OHM 1% 0.6W AXIAL | 2 | A14,A17 |
| BC4181CT-ND | MRS25000C4704FCT00 | RES 4.7M OHM 0.6W 1% AXIAL | 2 | A14 |
| CMF2.00KHFCT-ND | CMF552K0000FHEB | RES 2.00K OHM 1/2W 1% AXIAL | 2 | A15 |
| BC4533CT-ND | MBE04140C4700FC100 | RES 470 OHM 1% 1W AXIAL | 3 | A15 |
| PPC68KW-1CT-ND | PR01000106802JR500 | RES 68K OHM 1W 5% AXIAL | 4 | A16 |
| CMF1.0KHBCT-ND | CMF551K0000BEEB | RES 1.0K OHM 1/2W 0.1% AXIAL | 1 | A16 |
| 989-1203-1-ND | GS-3-100-2203-F-LF | RES 220K OHM 3W 1% AXIAL | 4 | A18 |
| MOX5002002GSE-ND | MOX5002002GSE | RES 20K OHM 2W 2% AXIAL | 4 | A18 |
| 1N4745AVSCT-ND | 1N4745A-TR | DIODE ZENER 16V 1.3W DO41 | 10 | |
| 1N5952BRLGOSCT-ND | 1N5952BRLG | DIODE ZENER 130V 3W AXIAL | 10 | A18 |
| SMBJ5382B-TPMSCT-ND | SMBJ5382B-TP | DIODE ZENER 140V 5W DO214AA (SMD, no stock for TH zener) | 4 | A18 |
| 1N5386BRLGOSCT-ND | 1N5386BRLG | DIODE ZENER 180V 5W AXIAL | 4 | A18 |
| 1N5263B-TAPCT-ND | 1N5263B-TAP | DIODE ZENER 56V 500MW DO35 | 10 | A18 |
| BZX85C10-T50RCT-ND | BZX85C10-T50R | DIODE ZENER 10V 1W DO41 | 10 | A18 |
| 1N5388BGOS-ND | 1N5388BG | DIODE ZENER 200V 5W AXIAL | 10 | A18 |
| ATF22V10C-15PU-ND | ATF22V10C-15PU | IC PLD 10MC 15NS 24DIP for A17 inguard Rev.B FW | 1 | A17 |
| AT28C256-15PU-ND | AT28C256-15PU | IC EPROM 256K PARALLEL 28DIP | 1 | A20 |
| AT27C256R-70PU-ND | AT27C256R-70PU | IC EPROM 256K PARALLEL 28DIP OTP | 1 | A17 |
| AT27C010-70PU-ND | AT27C010-70PU | IC EPROM 1M PARALLEL 32DIP Firmware A20 | 6 | A20 |
| 5-1571552-0-ND | 5-1571552-0 | CONN IC DIP Collet SOCKET 32POS GOLD for 5720A mod | 2 | A20 |
| OPA627BP-ND | OPA627BP | IC OPAMP GP 16MHZ 8DIP | 1 | A16 |
| LF256H/NOPB-ND | LF256H/NOPB | IC OPAMP JFET 5MHZ TO99-8 | 2 | A16 |
| LF412ACN/NOPB-ND | LF412ACN/NOPB | IC OPAMP JFET 4MHZ 8DIP | 2 | A15 |
| BC3180-ND | 440LS20-R | CAP CER 0.02UF 760VAC Y5U RADIAL | 2 | A16 |
| TIP121TU-ND | TIP121TU | TRANS NPN DARL 80V 5A TO-220 | 5 | A11,A7,A16 |
| H710-ND | PMSSS 632 0038 PH | MACHINE SCREW PAN PHILLIPS 6-32 | 100 | Frame |
| H713-ND | PMSSS 632 0075 PH | MACHINE SCREW PAN PHILLIPS 6-32 | 100 | Frame |
| TC74HC4051APF-ND | TC74HC4051APF NCNR | IC MUX/DEMUX 8×1 16DIP | 10 | A16 |
| 497-2628-5-ND | TIP32C | TRANS PNP 100V 3A TO-220 | 5 | |
| 497-2543-5-ND | TIP122 | TRANS NPN DARL 100V 5A TO-220 | 5 | |
| 255-2931-ND | DSP1-DC5V-F | RELAY GENERAL PURPOSE DPST 5A 5V | 5 | A14,A15 |
| 255-1062-ND | DS2E-S-DC5V | RELAY GEN PURPOSE DPDT 2A 250V | 10 | various boards |
| 255-1066-ND | DS2E-SL2-DC5V | RELAY GEN PURPOSE DPDT 2A 250V | 10 | various boards |
| H153-ND | HMSSS 632 0125 | MACH SCREW HEX #6-32 | 10 | |
| VN0550N3-G-ND | VN0550N3-G | MOSFET N-CH 500V 50MA TO92-3 | 10 | A18 |
| LND150N3-G-ND | LND150N3-G | MOSFET N-CH 500V 30MA TO92-3 | 10 | A18 |
| IRF820APBF-ND | IRF820APBF | MOSFET N-CH 500V 2.5A TO-220AB | 5 | A15 |
| FQP3P50-ND | FQP3P50 | MOSFET P-CH 500V 2.7A TO-220 | 5 | A15 |
| A24205CT-ND | 350980-3 | CONN SOCKET 18-24AWG SL156 GOLD | 25 | Contacts for trafo cables |
| EG1026-ND | P227EE1CXC | SWITCH PUSHBUTTON DPST 7A 125V | 1 | Donor switch for spare |
| TSM2N7000KCTA3GCT-ND | TSM2N7000KCT A3G | MOSFET N-CHANNEL 60V 300MA TO92 | 20 | Spare FET |
| MPSA56CS-ND | MPSA56 | TRANS PNP 80V 0.5A TO92 | 10 | Spare PNP |
Summary
xDevs.com will definitely cover more about these calibrators and their performance in future articles and experiments. We have access to other 5700A, 5720A and 5730A data to perform more interesting comparisons in coming years.
Discussion about this article and related stuff is welcome in comment section or at our own IRC chat server: irc.xdevs.com (standard port 6667, channel: #xDevs.com). Web-interface for access mirrored on this page.
Modified: Dec. 15, 2019, 7:20 a.m.