6
Thermo-Hygrometer Model CA846
CHAPTER 3
SPECIFICATIONS
3.1
Environmental Specifications
Temperature Scale:
Celsius (°C) or Fahrenheit (°F) user-selectable
Temperature Sensor:
NTC
Measurement Range:
-4° to 140°F, -20° to 60°C
Resolution:
0.1°F/°C
Accuracy:
-4° to 32°F ± 2°F (-20° to 0°C ± 1°C)
32° to 140°F ± 1°F (0° to 60°C ± 0.5°C)
Temperature Coefficient:
0.1 times the applicable accuracy specification
per °C from 0° to 18°C and 28° to 50°C (32° to 64°F and 82° to 122°F)
Humidity Sensor:
Electronic capacitance polymer film sensor.
(The sensor is unaffected by water condensation, and is immune to most
reagent vapors)
Measurement Range:
0% to 100% RH
Resolution:
0.1% RH
Accuracy (@ 25°C):
10%-90% RH ± 5.0%
0%-10% RH; 90% to 100% RH ± 10.0%
Sensor Response Time for 90% of Range:
60s typical
Sensor Stability:
±2% RH, 2 years typical
Sensor Hysterisis (10% to 90% to 10% RH):
±1% RH typical
Sensor Temperature Dependence:
Negligible from 32° to 140°F (0° to 60°C)
Operating Temperature:
32° to 122°F (0°C to 50°C) at < 80% RH
Storage Temperature:
-4° to 140°F (-20° to 60°C), 0 to 80% RH with battery removed
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