Tab 04 SOW.pdf

List of NASA Stennis B2 Test Stand

Pacific Instruments Hardware Evaluation/Recalibration/Repairs

August 2026

Statement of Work:

The listed serial numbers of Pacific Instruments hardware are in need of evaluation, testing, recalibration, and (where necessary) repairs. These items were bought years ago from Pacific Instruments for use at the B2 Test Stand at NASA Stennis Space Center. The items need maintained to ensure we have sufficient working critical spares on hand to record data on the B2 test stand’s data acquisition systems.

The vendor will:

1) Receive the listed serial numbers of items, which SSC will ship to them.

a. The items are 40 Pacific Instruments Model 6068-3006 cards and 1 Pacific Instruments Model 6000UB chassis

2) Perform testing/evaluation, diagnosis of any problems, troubleshooting, and electronic repairs

3) Perform recalibration

4) Provide a repair report listing work performed

5) Ship back the hardware fully tested and refurbished as needed to a repaired/recalibrated “refurbished - like-new” state.

6) In the event certain items, upon vendor evaluation, are diagnosed as beyond economical repair, contact SSC for further guidance.

Note: The Pacific Instruments $675 per card service level (PIRPR-6000) instead of the $925 per card service level (PISVC-6000) is acceptable as while we want testing and calibration, detailed calibration data and a formal calibration certificate is not required.

Sole Source Justification:

Pacific Instruments (of Concord, California) is the manufacturer of the items in need of evaluation/repair. Due to the proprietary design of these items, Pacific is the only organization capable of handling this work. No other supplier would have the knowledge of the proprietary design and proprietary test/evaluation processes for handling these items. Due to the specialized nature of these items (signal conditioning hardware systems for rocket propulsion testing), it is critical that they be repaired solely by the organization that has proprietary knowledge of the design (e.g. the OEM that designed it in the first place).

Note Regarding IT Security:

This would not be considered an IT acquisition because NASA is not buying anything new. The items are already owned by NASA Stennis and we are just paying for evaluation and repair of items we already own. Furthermore, the items are primarily analog signal conditioning hardware (like analog amplifiers and excitation power supplies) and are not necessarily IT (they’d more be OT – Operational Technology). Finally, no items need added to a security plan as we are not buying any new items.

List of NASA Stennis 6068-3006 cards for repair/recalibration - August 2026

Item

6068- Base Board Serial Number

Filter Board Serial Number (all Bessel)

Ch 0 Feature Card Serial Number

Ch 1 Feature Card Serial Number

Feature Card Type

FC1=Bridge / Voltage

FC4=IEPE

(mostly 6 mA)

Notes (such as errors seen in Panel 60)

Note: Cards have input channels 0 and 1, but channels have analog outputs 1 and 2.

1 6191103 5551129 5242157 5242134 FC1 Ch 0 Aout 2 can’t cross zero 2 5273108 5201146 5204146 5204331 FC1 Ch 0 Aout 1 can’t cross zero 3 6191116 5274185 5692178 5242244 FC1 Ch 0 azro didn’t cross zero, coarse -

4 4085108 4017175 5692293 5692296 FC1 Ch 0 azro didn’t cross zero, coarse

5 4005126 4004111 5204180 5242216 FC1 Samples occasionally read 256 counts too low when card is in VCAL mode. Channel 1 is now locked at -10V when re-testing.

6 5236154 5274154 5242165 5204209 FC1 Ch 1 Aout 2 can’t cross zero 7 4085178 4017122 5204203 5242177 FC1 Ch 1 Aout 2 can’t cross zero 8 5200145 5274208 5242178 5204198 FC1 Reported as suspected bad and changing card fixed problem (no further information).

9 4005123 4004101 5204213 5692122 FC1 Reported as suspected bad and changing card fixed problem (no further information).

10 4085171 4017126 5204137 5692164 FC1 Reported as suspected bad and changing card fixed problem (no further information).

11 4005112 4004106 5242156 5692344 FC1 Reported as suspected bad and changing card fixed problem (no further information).

12 4085135 4017157 5204193 5242111 FC1 Reported as suspected bad and changing card fixed problem (no further information).

13 4005127 5551101 5676162 5676116 FC4 Ch 0 flat line in response to VCAL sine wave input. Ch 0 reports azro didn’t cross zero, coarse -5.

14 4005116 5551112 5676181 5676115 FC4 Reported as suspected bad and changing card fixed problem (no further information).

15 6191128 5201142 5676159 5676165 FC4 Reported as suspected bad and changing card fixed problem (no further information).

16 4005106 5551118 5676179 5676191 FC4 Reported as suspected bad and changing card fixed problem (no further information).

17 4005102 4004116 5676160 5676161 FC4 Ch 0 flat line in response to VCAL sine wave input. Ch 0 reports Aout2 can’t cross zero.

18 4085172 4017120 5676101 5676111 FC4 Ch 0 flat line in response to VCAL sine wave input. Ch 0 reports Aout2 can’t cross zero.

19 4005117 5551109 5676131 5676136 FC4 Ch 0 flat line in response to VCAL sine wave input. Ch 0 reports azro didn’t cross zero, coarse 2.

20 4005107 5551122 5676188 5676134 FC4 Ch 0 flat line in response to VCAL sine wave input. Ch 1 reports Aout2 can’t cross zero.

21 4005125 5551121 5676177 5676180 FC4 Ch 1 flat line in response to VCAL sine wave input. Ch 1 reports azro didn’t cross zero, coarse 82.

22 4085102 4017153 5676185 5676178 FC4 Ch 1 flat line in response to VCAL sine wave input. Ch 1 reports azro didn’t cross zero, coarse 82.

23 4085182 4017121 5676198 5676166 FC4 Both channels have odd square wave (clipping at -0.37 and +1.05V) in response to a VCAL sine wave input (6Vrms with gain 1).

24 4005130 4004114 5204293 5204244 FC1 Problem with digital side of channel 1: reads 256 counts too low one sample every 10 minutes or so

25 5200133 5201114 5242245 5242258 FC1 Card noted as “may have problems with filter”

26 5236168 5274168 5676126 5676140 FC4 Card noted as “seems to have problems with filters or amplifiers”

27 4005119 4004107 4023117 5676148 FC4 Card noted as “card has dropouts – one sample is sometimes 256 counts too low”

28 4005109 3987101 5204315 5692304 FC1 Problem with digital part of channel

0. Sometimes 256 counts too low for 1 sample (out of every ~200,000). Card sent to Pacific in Fall 2020 but problem didn’t get fixed. (July 2026 – put spare feature cards on)

29 5236186 5274186 5204272 5204273 FC1 Problem reported as “channel 0 does not cal or zero”

30 5236124 5274146 5240102 5692225 FC1 Card noted as “bad channel 0” 31 5273164 5201529 5204344 5204181 FC1 Problems reported as “ch 0 pegged at -32768 counts and ch 0 won’t cross zero – coarse -32768”

32 5200167 5274211 5676156 5676208 FC4 Problems suspected with excitation on Channel 1 – changing FC4 card didn’t appear to help so it’s presumably on the base board

33 4005101 4004105 5676119 4023171 FC4 Problem documented as “sometimes stops communicating with software and appears as a 6033 card”

34 5200132 5274235 5242253 5692150 FC1 Noted that “both channels look like a ragged square wave; changing feature cards did not solve problem.”

35 6191112 5201540 5204233 5242211 FC1 Noted that “card seems to have problems with filters”

36 4085189 401741 5676169 5676103 FC4 Noted that Channel 0 was having issues – Azero didn’t cross zero, and gain wasn’t as expected.

37 4085168 4017149 5204294 5692309 FC1 Channel 0 suspected bad 38 5236137 5274137 5677185 5240210 FC8 Ch 1was seen to have data dropouts on Low Speed Data Acquisition System; replacing the feature cards didn’t fix the problem

39 4005129 4004113 4023148 4023102 FC4 Was seen to have dropouts – went down 256 counts below expectations for one sample every few seconds

40 5273179 5436104 5204289 5204230 FC1 Ch 0 – Excitation issues – excitation significantly too high with XMONV. Ch 1 – FC1 card serial number “unknown” in Panel 60.

Item #41 for repair is a Pacific 6000UB chassis, S/N 5000117. A -15V power supply appears to be bad.