| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. REGISTER COLUMN DEFINITIONS | |||
| A1 | Column 1: EQUIPMENT ID — unique asset code (e.g., CUBE-MOULD-01, COMP-MACHINE-01) Acceptance: Unique code per item; consistent with asset register and labels on equipment | Cl. 6.4 — Equipment | OK NC NA HOLD |
| A2 | Column 2: DESCRIPTION / TYPE — equipment name, make, model, capacity / range Acceptance: Full description including make, model, serial no.; example cube mould 150×150×150 mm per IS 10086 | Cl. 6.4 — Equipment info | OK NC NA HOLD |
| A3 | Column 3: LAST CALIBRATION DATE — most recent certificate date Acceptance: Date matches certificate; calibration agency's accreditation (NABL) noted | Cl. 6.4.8 — Records | OK NC NA HOLD |
| A4 | Column 4: CALIBRATION INTERVAL — defined frequency per OEM / standard / use Acceptance: Interval defined: compression machine 1 year; cube moulds annual dimensional; thermometers 6 months | Cl. 6.4.7 — Interval | OK NC NA HOLD |
| A5 | Column 5: NEXT DUE DATE — auto-calculated from last cal + interval Acceptance: Due date calculated; colour-coded status (green/amber/red) for visibility | Cl. 6.4.7 — Traceability | OK NC NA HOLD |
| A6 | Column 6: CALIBRATION AGENCY — NABL-accredited lab name and accreditation number Acceptance: Only NABL-accredited agency; accreditation number and validity verified | Cl. 6.5 — Metrological traceability | OK NC NA HOLD |
| A7 | Column 7: CERTIFICATE NO. & STATUS — pass/fail/adjusted Acceptance: Certificate number recorded; status clearly indicated; fail items taken out of service | Cl. 7.8 — Reporting | OK NC NA HOLD |
| A8 | Column 8: REMARKS — calibration uncertainty, adjustments made, deviation notes Acceptance: Uncertainty values captured; corrections/adjustments logged | Cl. 7.6 — Uncertainty | OK NC NA HOLD |
| B. EQUIPMENT CATEGORIES COVERED | |||
| B1 | Compression testing machine (CTM) — calibration annual by NABL agency Acceptance: CTM calibrated per IS 14858 / IS 516 annex; certificate covers required load range | Cl. 6.4 — Equipment | OK NC NA HOLD |
| B2 | Weighing scales and balances — calibration semi-annual against standard weights Acceptance: Accuracy class declared; traceable weights used; certificate on file | Cl. 6.4 — Balances | OK NC NA HOLD |
| B3 | Cube moulds (e.g. per IS 10086) — dimensional check annual and on receipt Acceptance: Inside dimension ±0.2 mm; flatness ≤ 0.03 mm; perpendicularity 90° ± 0.5° per IS 10086 | Cl. 4 — Mould tolerances | OK NC NA HOLD |
| B4 | IS sieves — aperture verification annual; visual inspection before each use Acceptance: Sieve apertures conform to IS 460; damaged sieves withdrawn | Cl. 6.4 — Sieves | OK NC NA HOLD |
| B5 | Thermometers, ovens, curing tanks — temperature verification every 6 months Acceptance: Oven 105 ±5°C verified; curing tank 27 ±2°C verified; data logger retained | Cl. 6.4 — Environmental | OK NC NA HOLD |
| B6 | Slump cone, density apparatus, core cutter, penetrometer — annual verification Acceptance: Dimensional and functional checks per respective IS; traceable standards used | Cl. 6.4 — Field equipment | OK NC NA HOLD |
| C. CALIBRATION PLANNING AND SCHEDULING | |||
| C1 | Monthly review of items due in next 60 days; calibration POs raised in advance Acceptance: 60-day look-ahead list generated; PO raised ≥ 30 days before due date | Cl. 6.4.7 — Intervals | OK NC NA HOLD |
| C2 | Spare / backup equipment arranged during calibration downtime Acceptance: Backup identified for critical equipment to prevent testing interruption | Cl. 6.4 — Continuity | OK NC NA HOLD |