Appendix F pump-failure test budget for a four-rack teaching zone
5.0 s nominal response budget < 6.0 s assumed screen; hardware acceptance HOLDmodeled
| Value kind | modeled — Interpret this value according to its displayed kind, scope, source, and as-of date. |
|---|---|
| Scope | Exact nominal teaching inputs, displayed to two significant figures: four racks at 100 kW liquid heat each (100 specified to two significant figures); sensing 0.50 s, logic 0.50 s, recovery 3.0 s, allowance 1.0 s, candidate limit 6.0 s. HPE’s separate 115 kW liquid duty bounds the load scale. Uptime’s single-phase cold-plate pump-failure category is seconds, not an OEM six-second limit. The allocations and limit remain assumptions; arithmetic precision is not engineering accuracy. |
| As of | 2026-09-08 |
| Source | Guide derivation — stated assumptions and arithmetic, September 8, 2026; Uptime Intelligence Report 117M (November 2023), p. 10, Table 3 scenario 2, bounds the illustrative time scale; Chapters 5.11 and 13.6 require product qualification. · Chapter 5.11, loss-of-flow response and qualified protection boundary; Appendix F, F-R02.1/.2 teaching calculation and assumed response budget. |
| Derivation | 4×100=400 kW (two significant figures). Sequential nominal response=0.50+0.50+3.0=4.0 s; plus 1.0 s allowance gives 5.0 s, below the assumed 6.0 s screen. At recovery 4.0 s, budget=6.0 s: equality fails the strict before-limit criterion. Actual allowable time must exceed the measured total plus uncertainty under Chapter 5.11. HOLD hardware acceptance until that envelope and the independent control/power path are demonstrated. |
| Review | checking…cadence-derived review 2027-01-06 · standard cadence |
| Recorded changes | none recorded |
| Claim id | guide2-t214-f-pump-protection-test |
Where the guide uses it
Not quoted in a chapter yet; it is kept in the curated register.
← Full numbers register — every date-stamped figure in the guide, with revision history.