Research grade helium is recommended. If unavailable, use helium with a dew point of -67 °C
(-88 °F) or lower. Carbon dioxide, argon, dry air, or nitrogen can also be used for different applic-
ations (a multigas option is available for connection of multiple gases).
Gases
1 cm
3
chamber 1.14 cm ID × 1.1 cm D (0.45 in. ID × 0.44 in. D)
10 cm
3
chamber 1.85 cm ID × 3.95 cm D (0.72 in. ID × 1.55 in. D)
100 cm
3
chamber 4.62 cm ID × 6.18 cm D (1.82 in. ID × 2.43 in. D)
350 cm
3
chamber 5.84 cm ID× 13.94 cm D (2.30 in. ID × 5.49 in. D)
2000 cm
3
chamber 9.52 cm ID × 26.00 cm D (3.80 in. ID × 10.20 in. D)
Sample Cups
Precision
Reproducibility is typically to within ±0.01% of the nominal full-scale
sample chamber volume.
Reproducibility is guaranteed to within ±0.02% of the nominal full-
scale volume on clean, dry, thermally equilibrated samples using
helium in the 15 to 35 °C range.
Accuracy Accurate to within 0.03% of reading, plus 0.03% of sample capacity
Gas Consumption
Approximately 0.1 cm³ STP times the nominal cell volume for each
cycle
Approximately 2 cm³ STP times the nominal cell volume per ana-
lysis
Analysis
Specifications for AccuPyc II
AccuPyc II 1345 Operator Manual
134-42851-01 (Rev A) — Jan 2021
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