Humidity 321 User Manual

Humidity & Temperature Meter

Model : 321

Technical Specifications

Display : Large 3-1/2 digital LCD display with backlight.
Sensor Type : Humidity : Precision capacitance sensor.

Temperature : Thermistor (probe) and type “K” thermocouple.
Response Time : Probe Temperature and Relative Humidity : 3 minutes.
Accuracy note : Accuracy is specified for the following ambient temperature range:
64 to 82℉ (18 to 28℃)
Sampling Rate : 2.5 samples per second.
Polarity : Automatic, (-) negative polarity indication.
Over-range : “OL” mark indication.
Low battery indication : The “ “ is displayed when the battery voltage drops below the operating level.
Operating Conditions : 32 to 122℉ (0 to 50℃); < 80%RH non-condensing.
Storage Conditions : 14 to 140℉ (-10 to 60℃); <80%RH non-condensing.
Auto Power Off : Meter automatically shuts down after approx. 15 minutes of inactivity.
Power : One standard 9V , NEDA 1604 or 6F22 battery.
Dimensions/Wt.: 225(H) x 45(W) x 34(D)mm/200g
Humidity/Temperature Measurement Range:
Humidity : 0%〜100%RH
Temperature : -20.0℃〜+60℃ (-4℉ to 140℉)
Resolution : 0.1%RH, 0.1℃/℉
Humidity Accuracy : ±3.5%RH (at 25db, 5%〜95%RH)
Note: The measuring range is from 0% to 100%, but above 95% and below 5% the deviation is not specified.
Air Temperature Accuracy: ±2.5℃; ±3.5℉

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