Tweezers for Individual Calibration Weights

The W1000-TF is the calibration-weight handling tweezers for the Accuris W1000 F1 Grade Calibration Weight family (and any other OIML F1 / M1 grade calibration weight). Tweezers are workflow-mandatory for proper calibration-weight handling — skin oils and fingerprints contaminate calibration weights and compromise calibration accuracy by adding micrograms of organic mass to the weight surface.

Key Specifications

Why Tweezers Are Workflow-Mandatory

OIML F1 calibration weights have micrograms-level tolerance at the gram-mass scale (e.g., F1 100 g weight has ±0.5 mg tolerance = 5 ppm). Skin contact contaminates the weight with:

• Skin oils — adds micrograms of lipid mass; persistent contamination
• Fingerprints — adds micrograms of organic mass; visible after several handling cycles
• Salt residue — from perspiration; corrodes weight surface over time
• Moisture — from skin contact; can cause weight oxidation if not promptly cleaned

Consequence of contaminated calibration weights:

• Weight reads HIGHER than nominal mass → balance calibration biased high
• Calibration cycle gives wrong calibration parameters → all subsequent measurements biased
• Re-cleaning the weight is non-trivial and may require re-certification
• ISO 17025 / GLP audit findings on calibration-weight handling protocol

Tweezers eliminate these contamination risks — operator handles weights via tweezers, weights never contact skin, calibration accuracy is preserved across handling cycles.

When to Order This SKU

Workflow-mandatory accessory for any calibration-weight procurement. Order this SKU when:

1. Initial calibration weight procurement — order alongside the first W1000 calibration weight (or any OIML F1 / M1 weight) for proper handling protocol
2. Multi-investigator / multi-bench facility — facilities with multiple calibration-weight users need multiple tweezers (one per workstation typical)
3. Replacement — original tweezers damaged, contaminated, or lost
4. ISO 17025 / GLP compliance — regulated environments require documented calibration-weight handling protocol; tweezers are part of the SOP

The tweezer accessory is inexpensive ($42) relative to the cost of the calibration weights it protects ($77 for 100 g F1 weight up to $257 for 1 kg F1 weight, plus weight re-certification cost if contaminated). Do not procure calibration weights without tweezers.

Application Profile

All OIML calibration weight procurement — every lab procuring W1000 / W1005 calibration weights should pair with tweezers procurement.

Multi-investigator calibration facility — shared calibration-weight facilities benefit from multiple tweezers across workstations.

ISO 17025 / GLP regulated lab — regulated environments where calibration-weight handling protocol is part of the documented SOP.

Educational laboratory calibration training — graduate-level analytical chemistry programs introducing calibration concepts use tweezers for hands-on training.

Replacement after damage / loss — replacement procurement after equipment-relocation incidents.

Ordering & Configuration

Pair with calibration weight procurement. Confirm calibration weight inventory or pairing-procurement plan at order.

Stock multiple tweezers for multi-bench facilities. A typical 3–5 bench analytical-balance facility benefits from 3–5 tweezers (one per bench).

Confirm at quote: calibration weight inventory or pairing-procurement plan, multi-bench tweezers quantity, and lead time.

Warranty: Per Accuris standard accessory terms — confirm at quote.

Accuris calibration weight handling protocol:

- W1000 F1 grade weights (100 g / 200 g / 500 g / 1000 g)

- W1005 M1 grade weights (1 g / 10 g / additional pack-size variants)

- W1000-TF (this product) — Tweezers for individual calibration weights ($42) — workflow-mandatory

Pair tweezers procurement with every calibration weight procurement; do not handle calibration weights with bare hands.