Table 3 Specification of instruments.
From: Dataset of ultralow temperature refrigeration for COVID 19 vaccine distribution solution
Instruments | Measurement | Measurement Range | Accuracy |
|---|---|---|---|
Type-T thermocouple | Temperature distribution of container and packages, Supply and return air temperature of refrigeration system | Element temp range is −195 °C(−320°F) to 371 °C(700 °F), insulation rated to 221 F | ±0.5 °C (±0.9 °F) |
CO2 sensor, NDIR Non-Dispersive InfraRed, pass through type, 5VDC input | CO2 level inside of container | 1 to 4.7 VDC for 0 to 30% Vol. CO2 Concentration linear | ±[0.2%vol. CO2 ± 3% of measured value] ± [20 mV ± 2% of measured volts]*8.11%/V |
Figaro O2 sensor, Electrochemical Fuel Cell, pass through type, Amplified with 5 VDC input | O2 level inside of container | 0.144 to Span Voltage (Calibration 20.8% Vol., value) | +/− 1% |
Omega Differential Pressure Transmitter, Diaphragm Differential Pressure, 12 to 36 VDC input | pressure difference between inside and outside of refrigeration container unit | 1 to 5 VDC for −10 to 10 IWG (Inch Water Gauge) | As good as calibrated 0.05% |
Scale (Mechanical) | weight | 0–31.75 kg (70 lbs) | 0.567 kg (1/8 lbs) |
